Azure99/stackoverflow-qa-top-300k · Datasets at Hugging Face

46,707,339

How to filter column on values in list in pyspark?

I have a dataframe rawdata on which i have to apply filter condition on column X with values CB,CI and CR. So I used the below code: <pre><code>df = dfRawData.filter(col("X").between("CB","CI","CR")) </code></pre> But I am getting the following error: <blockquote> between() takes exactly 3 arguments (4 given) </blockquote> Please let me know how I can resolve this issue.

46,707,814

1

null

2017-10-12 10:30:13.277 UTC

3

2022-09-15 10:14:56.98 UTC

null

2,753,501

null

7,861,979

null

1

19

apache-spark|pyspark|apache-spark-sql

64,838

The function <code>between</code> is used to check if the value is between two values, the input is a lower bound and an upper bound. It can not be used to check if a column value is in a list. To do that, use <code>isin</code>: <pre><code>import pyspark.sql.functions as f df = dfRawData.where(f.col("X").isin(["CB", "CI", "CR"])) </code></pre>

28,020,001

Cannot apply indexing with [] to an expression of type 'System.Collections.Generic.ICollection<int> in mvc controller

<pre><code>public ActionResult addstandardpackage1(ICollection<int> SingleStay,ICollection<int> DOUBLESTAY,ICollection<int> TRIBLESTAY,ICollection<int> FAMILYSTAY,ICollection<int> EXTRABED) { var s = SingleStay; for (int i = 0; i < SingleStay.Count; i++ ) { var cal = SingleStay[i]; } foreach (var key in SingleStay) { var value = key; } } </code></pre> In for Loop i am get the error like Cannot apply indexing with [] to an expression of type But i need in for loop , in for each i am getting . because based on for loop i will bind the details with other collection lists. Please Help me. I am getting error in <code>var cal=Singlestay[i]</code>.

28,020,042

3

0

null

2015-01-19 07:47:47.11 UTC

2

2019-10-17 18:26:58.307 UTC

2017-08-28 15:22:50.403 UTC

user2160375

1,912,756

null

3,643,560

null

1

23

c#|model-view-controller

41,436

Just convert it to an array: <pre><code>var s = SingleStay.ToArray(); </code></pre> note that this will consume additional memory though. Better way would be to get an Array or any other collection-form that supports indexer in the first place. Yet another way would be to implement it with an index variable: <pre><code> var s = SingleStay; int i = 0; foreach (var cal in s) { //do your stuff (Note: if you use 'continue;' here increment i before) i++; } </code></pre>

51,700,425

what is the relation and difference between ipython and jupyter console

After the ipython notebook project renamed to jupyter, I always think that <code>ipython notebook</code> is the same as <code>jupyter notebook</code> and <code>ipython</code> shell is just an alias of <code>jupyter console</code>. Today I realize that <code>ipython</code> does not have <code>connect_info</code> magic defined and therefore is not able to be connected to from different backends. I have the following component installed in my conda: <pre><code>ipython 6.1.0 py36_0 defaults jupyter 1.0.0 py36_4 defaults jupyter_client 5.2.3 py36_0 defaults jupyter_console 5.2.0 py36he59e554_1 defaults jupyter_contrib_core 0.3.3 py36_1 conda-forge jupyter_contrib_nbextensions 0.5.0 py36_0 conda-forge jupyter_core 4.4.0 py36h7c827e3_0 defaults </code></pre> I have the following questions: <ol> <li>What is the relation between the <code>ipython</code> of this version and <code>jupyter console</code> of this version? </li> <li>Does the <code>ipython notebook</code> (deprecated as in <code>ipython 6.1.0</code>) another share some components with <code>jupyter</code> libraries; or <code>ipython notebook</code> is still self-contained?</li> <li>Do <code>ipython</code> and <code>jupyter</code> have any dependencies? </li> </ol>

51,703,852

1

0

null

2018-08-06 04:05:12.997 UTC

12

2020-11-19 14:19:10.293 UTC

null

7,026,980

null

1

38

python|ipython|jupyter

14,754

<a href="https://jupyter.readthedocs.io/en/latest/projects/architecture/content-architecture.html" rel="noreferrer">Architecture Guides — Jupyter Documentation</a> has the authoritative info on how IPython and Jupyter are connected and related. Specifically, as per <a href="https://jupyter.readthedocs.io/en/latest/use/advanced/migrating.html" rel="noreferrer">Migrating from IPython Notebook — Jupyter Documentation</a>: <blockquote> <a href="https://blog.jupyter.org/the-big-split-9d7b88a031a7" rel="noreferrer">The Big Split</a> moved IPython’s various language-agnostic components under the Jupyter umbrella. Going forward, Jupyter will contain the language-agnostic projects that serve many languages. IPython will continue to focus on Python and its use with Jupyter. </blockquote> <a href="https://test-jupyter.readthedocs.io/en/latest/architecture/how_jupyter_ipython_work.html" rel="noreferrer">Jupyter's architecture</a> includes frontends (web or console) and backends (kernels for various languages). IPython console is only about Python and terminal. "IPython Notebook", if it's still a thing (it doesn't work out of the box if I <code>pip install ipython</code> as of IPython 5.5.0), is probably a rudiment of the moved components for backward compatibility. IPython is a dependency of Jupyter: <pre><code>> pip show jupyter <...> Requires: ipywidgets, qtconsole, nbconvert, notebook, jupyter-console, ipykernel > pip show ipython <...> Required-by: jupyter-console, ipywidgets, ipykernel </code></pre>

8,394,357

What exactly are Delay signing and strong names in .net?

I have seen in many article it is written that Delay signing and strong name for an assembly prevents it from hi-jacked. What does that mean? The only thing that i know is without a strong name you can not install an assembly in GAC. So suppose i have an assembly without a strong name, Can it be hi-jacked? Someone please clarify my doubt.

8,394,506

1

0

null

2011-12-06 01:47:58.76 UTC

10

2014-06-24 10:43:08.687 UTC

2011-12-06 03:15:29.243 UTC

null

241,753

null

275,846

null

1

25

c#|.net|delay-sign

14,420

There is plenty of information about this on MSDN; for example: <a href="http://msdn.microsoft.com/en-us/library/xwb8f617.aspx">Strong Naming</a>, and <a href="http://msdn.microsoft.com/en-us/library/t07a3dye%28v=VS.100%29.aspx">Delay Signing</a> To summarize the basic idea: Strong naming is a way of stamping your assembly with a simple identification mark, that can be used later to validate that it has not been modified since it was deployed. The strong name is basically a hash of the assembly's name, version, and a "strong-name key" unique to the developer. References to strong name assemblies go through stricter validation that reference to non-strongly-named ones; in particular, strong-named references must match version numbers, and the strong name hash must match. This helps avoid two common sources of potential security vulnerabilities in your programs: <ol> <li>A malicious user replaces an assembly in your program with a different assembly with the same file name, but which contains malicious code, and convinces your program to load and execute it.</li> <li>A malicious user replaces an assembly in your program with a different version of the same assembly, but which has known bugs that have since been fixed.</li> </ol> The strong name process will reject both of these actions because the strong name data will not match. This is why assemblies in the GAC must be strong named: they are uses so ubiquitously, they would otherwise make major targets for this kind of hijacking. Note, however, that strong names do absolutely nothing to verify the identity of the publisher. Anyone can publish a strongly-named assembly claiming to be Microsoft and there's nothing in the strong name to refute that assertion. Verifying identify is the job of Authenticode digital signatures, which are different from strong naming. The two are often used together, but they are orthogonal concepts. Delay signing is a technique for signing assemblies outside of the build process. The idea here is, your company might have policies that don't allow the strong name keys from being available at build time (perhaps they are kept offline, or secured behind a password.) A delay signed assembly is marked with a blank strong-name key: it basically reserves space for the key to be added later, by an authorized user. In the mean time, a partial strong-name key is included -- just enough information for other assemblies to make a strong reference, but not enough to detect changes or modifications.

8,818,119

How can I run a function from a script in command line?

I have a script that has some functions. Can I run one of the function directly from command line? Something like this? <pre><code>myScript.sh func() </code></pre>

8,818,150

10

0

null

2012-01-11 11:01:08.57 UTC

53

2022-03-21 15:28:00.77 UTC

2017-02-14 23:36:59.257 UTC

null

3,266,847

null

726,706

null

1

176

linux|bash|scripting

221,331

If the script only defines the functions and does nothing else, you can first execute the script within the context of the current shell using the <code>source</code> or <code>.</code> command and then simply call the function. See <code>help source</code> for more information.

48,253,103

How to get input text value in ionic

I'm trying to get <code>input</code> text value and store it in a variable named <code>input</code> in <code>ionic</code>. But I tried and failed. Can anyone please tell me what I have faulty done? This is my <code>HTML</code> <pre><code> <ion-content> <ion-list> <ion-item> <ion-label stacked>display</ion-label> <ion-input type="text" text-right id="input" ></ion-input> </ion-item> </ion-list> </ion-content> </code></pre> and this is my <code>home.ts</code> in ionic <pre><code>import { Component } from '@angular/core'; import { NavController } from 'ionic-angular'; @Component({ selector: 'page-home', templateUrl: 'home.html' }) export class HomePage { constructor(public navCtrl: NavController) { var input=document.getElementById('input').nodeValue; document.getElementById('seven').innerHTML=input; } } </code></pre>

48,253,114

3

0

null

2018-01-14 19:01:51.393 UTC

2

2021-06-04 12:32:21.303 UTC

null

5,486,116

null

8,794,865

null

1

19

html|angular|ionic-framework

64,663

Actually you seems to be using angular not angularjs, use [(ngModel)] <pre><code> <ion-input type="text" [(ngModel)]="name" text-right id="input" ></ion-input> </code></pre> and inside the component, <code>name:string;</code> so whenever you need the value , you can use. <code>console.log(this.name);</code>

53,851,828

TS2740 Type is missing the following properties from ReadOnly<MyInterface> error in React Native with TypeScript app

Since <code>StatelessComponent</code> is deprecated, I am trying to turn all the components into classes. I have an interface, for example: <pre><code>interface MyInterface{ prop1: number; prop2: boolean; } </code></pre> And I use it in the class: <pre><code>class MyComponent extends React.Component<MyInterface> { ... public render(){...} } </code></pre> And when I try to use <code>MyComponent</code> like this: <pre><code><MyComponent prop1={3} prop2={false} /> </code></pre> I get this error: <blockquote> TS2740: Type {prop1: 3, prop2: false} is missing the following properties from type ReadOnly: render, context, setState, forceUpdate, and 3 more. </blockquote> Is there any workaround to this?

53,854,058

4

null

2018-12-19 13:01:15.153 UTC

2

2020-04-08 22:50:29.92 UTC

2018-12-19 13:26:12.433 UTC

null

6,662,393

null

6,662,393

null

1

6

typescript|react-native

45,905

I finally solved the problem by changing the declaration of the class to <code>class MyComponent extends React.Component<any, MyInterface></code>.

30,739,244

Python Flask shutdown event handler

I'm using Flask as a REST endpoint which adds an application request to a queue. The queue is then consumed by a second thread. <code>server.py</code> <pre><code>def get_application(): global app app.debug = True app.queue = client.Agent() app.queue.start() return app @app.route("/api/v1/test/", methods=["POST"]) def test(): if request.method == "POST": try: #add the request parameters to queue app.queue.add_to_queue(req) except Exception: return "All the parameters must be provided" , 400 return "", 200 return "Resource not found",404 </code></pre> <code>client.py</code> <pre><code>class Agent(threading.Thread): def __init__(self): threading.Thread.__init__(self) self.active = True self.queue = Queue.Queue(0) def run(self): while self.active: req = self.queue.get() #do something def add_to_queue(self,request): self.queue.put(request) </code></pre> Is there a shutdown event handler in flask so that I can cleanly shutdown the consumer thread whenever the flask app is shutdown (like when the apache service is restarted)?

30,739,397

2

0

null

2015-06-09 17:46:54.363 UTC

4

2022-04-12 16:18:55.753 UTC

null

2,912,843

null

1

28

python|multithreading|flask

31,885

There is no <code>app.stop()</code> if that is what you are looking for, however using module <code>atexit</code> you can do something similar: <a href="https://docs.python.org/2/library/atexit.html" rel="nofollow noreferrer">https://docs.python.org/2/library/atexit.html</a> Consider this: <pre><code>import atexit #defining function to run on shutdown def close_running_threads(): for thread in the_threads: thread.join() print "Threads complete, ready to finish" #Register the function to be called on exit atexit.register(close_running_threads) #start your process app.run() </code></pre> Also of note-<code>atexit</code> will not be called if you force your server down using Ctrl-C. For that there is another module- <code>signal</code>. <a href="https://docs.python.org/2/library/signal.html" rel="nofollow noreferrer">https://docs.python.org/2/library/signal.html</a>

1,236,485

How to access elements of a C++ map from a pointer?

Simple question but difficult to formulate for a search engine: if I make a pointer to a map object, how do I access and set its elements? The following code does not work. <pre><code>map<string, int> *myFruit; myFruit["apple"] = 1; myFruit["pear"] = 2; </code></pre>

1,236,492

3

0

null

2009-08-06 00:59:45.953 UTC

6

2009-08-06 01:02:46.887 UTC

null

user123003

null

1

34

c++

44,364

You can do this: <pre><code>(*myFruit)["apple"] = 1; </code></pre> or <pre><code>myFruit->operator[]("apple") = 1; </code></pre> or <pre><code>map<string, int> &tFruit = *myFruit; tFruit["apple"] = 1; </code></pre>

632,434

LINQ to SQL Where Clause Optional Criteria

I am working with a LINQ to SQL query and have run into an issue where I have 4 optional fields to filter the data result on. By optional, I mean has the choice to enter a value or not. Specifically, a few text boxes that could have a value or have an empty string and a few drop down lists that could have had a value selected or maybe not... For example: <pre><code> using (TagsModelDataContext db = new TagsModelDataContext()) { var query = from tags in db.TagsHeaders where tags.CST.Equals(this.SelectedCust.CustCode.ToUpper()) && Utility.GetDate(DateTime.Parse(this.txtOrderDateFrom.Text)) <= tags.ORDDTE && Utility.GetDate(DateTime.Parse(this.txtOrderDateTo.Text)) >= tags.ORDDTE select tags; this.Results = query.ToADOTable(rec => new object[] { query }); } </code></pre> Now I need to add the following fields/filters, but only if they are supplied by the user. <ol> <li>Product Number - Comes from another table that can be joined to TagsHeaders.</li> <li>PO Number - a field within the TagsHeaders table.</li> <li>Order Number - Similar to PO #, just different column.</li> <li>Product Status - If the user selected this from a drop down, need to apply selected value here.</li> </ol> The query I already have is working great, but to complete the function, need to be able to add these 4 other items in the where clause, just don't know how!

632,487

3

1

null

2009-03-10 21:50:08.82 UTC

45

2010-06-11 19:34:18.207 UTC

2009-09-30 04:42:08.543 UTC

RSolberg

55,747

RSolberg

55,747

null

1

72

c#|asp.net|linq|linq-to-sql

93,342

You can code your original query: <pre><code>var query = from tags in db.TagsHeaders where tags.CST.Equals(this.SelectedCust.CustCode.ToUpper()) && Utility.GetDate(DateTime.Parse(this.txtOrderDateFrom.Text)) <= tags.ORDDTE && Utility.GetDate(DateTime.Parse(this.txtOrderDateTo.Text)) >= tags.ORDDTE select tags; </code></pre> And then based on a condition, add additional where constraints. <pre><code>if(condition) query = query.Where(i => i.PONumber == "ABC"); </code></pre> I am not sure how to code this with the query syntax but id does work with a lambda. Also works with query syntax for the initial query and a lambda for the secondary filter. You can also include an extension method (below) that I coded up a while back to include conditional where statements. (Doesn't work well with the query syntax): <pre><code> var query = db.TagsHeaders .Where(tags => tags.CST.Equals(this.SelectedCust.CustCode.ToUpper())) .Where(tags => Utility.GetDate(DateTime.Parse(this.txtOrderDateFrom.Text)) <= tags.ORDDTE) .Where(tags => Utility.GetDate(DateTime.Parse(this.txtOrderDateTo.Text)) >= tags.ORDDTE) .WhereIf(condition1, tags => tags.PONumber == "ABC") .WhereIf(condition2, tags => tags.XYZ > 123); </code></pre> The extension method: <pre><code>public static IQueryable<TSource> WhereIf<TSource>( this IQueryable<TSource> source, bool condition, Expression<Func<TSource, bool>> predicate) { if (condition) return source.Where(predicate); else return source; } </code></pre> Here is the same extension method for IEnumerables: <pre><code>public static IEnumerable<TSource> WhereIf<TSource>( this IEnumerable<TSource> source, bool condition, Func<TSource, bool> predicate) { if (condition) return source.Where(predicate); else return source; } </code></pre>

39,512,260

calculating Gini coefficient in Python/numpy

i'm calculating <a href="https://en.wikipedia.org/wiki/Gini_coefficient" rel="noreferrer">Gini coefficient</a> (similar to: <a href="https://stackoverflow.com/questions/31416664/python-gini-coefficient-calculation-using-numpy">Python - Gini coefficient calculation using Numpy</a>) but i get an odd result. for a uniform distribution sampled from <code>np.random.rand()</code>, the Gini coefficient is 0.3 but I would have expected it to be close to 0 (perfect equality). what is going wrong here? <pre><code>def G(v): bins = np.linspace(0., 100., 11) total = float(np.sum(v)) yvals = [] for b in bins: bin_vals = v[v <= np.percentile(v, b)] bin_fraction = (np.sum(bin_vals) / total) * 100.0 yvals.append(bin_fraction) # perfect equality area pe_area = np.trapz(bins, x=bins) # lorenz area lorenz_area = np.trapz(yvals, x=bins) gini_val = (pe_area - lorenz_area) / float(pe_area) return bins, yvals, gini_val v = np.random.rand(500) bins, result, gini_val = G(v) plt.figure() plt.subplot(2, 1, 1) plt.plot(bins, result, label="observed") plt.plot(bins, bins, '--', label="perfect eq.") plt.xlabel("fraction of population") plt.ylabel("fraction of wealth") plt.title("GINI: %.4f" %(gini_val)) plt.legend() plt.subplot(2, 1, 2) plt.hist(v, bins=20) </code></pre> for the given set of numbers, the above code calculates the fraction of the total distribution's values that are in each percentile bin. the result: <a href="https://i.stack.imgur.com/YKOUG.png" rel="noreferrer"><img src="https://i.stack.imgur.com/YKOUG.png" alt="enter image description here"></a> uniform distributions should be near "perfect equality" so the lorenz curve bending is off.

39,513,799

6

1

null

2016-09-15 13:26:21.98 UTC

9

2022-03-29 15:46:26.307 UTC

2017-05-23 10:33:51.72 UTC

null

-1

null

5,768,196

null

1

27

python|numpy|statistics

61,958

This is to be expected. A random sample from a uniform distribution does not result in uniform values (i.e. values that are all relatively close to each other). With a little calculus, it can be shown that the expected value (in the statistical sense) of the Gini coefficient of a sample from the uniform distribution on [0, 1] is 1/3, so getting values around 1/3 for a given sample is reasonable. You'll get a lower Gini coefficient with a sample such as <code>v = 10 + np.random.rand(500)</code>. Those values are all close to 10.5; the relative variation is lower than the sample <code>v = np.random.rand(500)</code>. In fact, the expected value of the Gini coefficient for the sample <code>base + np.random.rand(n)</code> is 1/(6*base + 3). Here's a simple implementation of the Gini coefficient. It uses the fact that the Gini coefficient is half the <a href="https://en.wikipedia.org/wiki/Mean_absolute_difference#Relative_mean_absolute_difference" rel="nofollow noreferrer">relative mean absolute difference</a>. <pre><code>def gini(x): # (Warning: This is a concise implementation, but it is O(n**2) # in time and memory, where n = len(x). *Don't* pass in huge # samples!) # Mean absolute difference mad = np.abs(np.subtract.outer(x, x)).mean() # Relative mean absolute difference rmad = mad/np.mean(x) # Gini coefficient g = 0.5 * rmad return g </code></pre> (For some more efficient implementations, see <a href="https://stackoverflow.com/questions/48999542/more-efficient-weighted-gini-coefficient-in-python">More efficient weighted Gini coefficient in Python</a>) Here's the Gini coefficient for several samples of the form <code>v = base + np.random.rand(500)</code>: <pre><code>In [80]: v = np.random.rand(500) In [81]: gini(v) Out[81]: 0.32760618249832563 In [82]: v = 1 + np.random.rand(500) In [83]: gini(v) Out[83]: 0.11121487509454202 In [84]: v = 10 + np.random.rand(500) In [85]: gini(v) Out[85]: 0.01567937753659053 In [86]: v = 100 + np.random.rand(500) In [87]: gini(v) Out[87]: 0.0016594595244509495 </code></pre>

6,976,944

How does ArrowLoop work? Also, mfix?

I'm fairly comfortable now with the rest of the arrow machinery, but I don't get how loop works. It seems magical to me, and that's bad for my understanding. I also have trouble understanding mfix. When I look at a piece of code that uses <code>rec</code> in a <code>proc</code> or <code>do</code> block, I get confused. With regular monadic or arrow code, I can step through the computation and keep an operational picture of what's going on in my head. When I get to <code>rec</code>, I don't know what picture to keep! I get stuck, and I can't reason about such code. The example I'm trying to grok is from <a href="http://www.soi.city.ac.uk/~ross/papers/notation.html">Ross Paterson's paper on arrows</a>, the one about circuits. <pre><code>counter :: ArrowCircuit a => a Bool Int counter = proc reset -> do rec output <- returnA -< if reset then 0 else next next <- delay 0 -< output+1 returnA -< output </code></pre> I assume that if I understand this example, I'll be able to understand loop in general, and it'll go a great way towards understanding mfix. They feel essentially the same to me, but perhaps there is a subtlety I'm missing? Anyway, what I would really prize is an operational picture of such pieces of code, so I can step through them in my head like 'regular' code. Edit: Thanks to Pigworker's answer, I have started thinking about rec and such as demands being fulfilled. Taking the <code>counter</code> example, the first line of the rec block demands a value called <code>output</code>. I imagine this operationally as creating a box, labelling it <code>output</code>, and asking the rec block to fill that box. In order to fill that box, we feed in a value to returnA, but that value itself demands another value, called <code>next</code>. In order to use this value, it must be demanded of another line in the rec block but it doesn't matter where in the rec block it is demanded, for now. So we go to the next line, and we find the box labelled <code>next</code>, and we demand that another computation fill it. Now, this computation demands our first box! So we give it the box, but it has no value inside it, so if this computation demands the contents of <code>output</code>, we hit an infinite loop. Fortunately, delay takes the box, but produces a value without looking inside the box. This fills <code>next</code>, which then allows us to fill <code>output</code>. Now that <code>output</code> is filled, when the next input of this circuit is processed, the previous <code>output</code> box will have its value, ready to be demanded in order to produce the next <code>next</code>, and thus the next <code>output</code>. How does that sound?

6,980,343

1

10

null

2011-08-08 01:11:36.92 UTC

13

2014-08-05 19:12:56.537 UTC

null

2,597,135

null

753,990

null

1

31

haskell|monads|arrows

2,802

In this code, they key piece is the <code>delay 0</code> arrow in the <code>rec</code> block. To see how it works, it helps to think of values as varying over time and time as chopped into slices. I think of the slices as ‘days’. The <code>rec</code> block explains how each day's computation works. It's organised by value, rather than by causal order, but we can still track causality if we're careful. Crucially, we must make sure (without any help from the types) that each day's work relies on the past but not the future. The one-day <code>delay 0</code> buys us time in that respect: it shifts its input signal one day later, taking care of the first day by giving the value 0. The delay's input signal is ‘tomorrow's <code>next</code>’. <pre><code>rec output <- returnA -< if reset then 0 else next next <- delay 0 -< output+1 </code></pre> So, looking at the arrows and their outputs, we're delivering today's <code>output</code> but tomorrow's <code>next</code>. Looking at the inputs, we're relying on today's <code>reset</code> and <code>next</code> values. It's clear that we can deliver those outputs from those inputs without time travel. The <code>output</code> is today's <code>next</code> number unless we <code>reset</code> to 0; tomorrow, the <code>next</code> number is the successor of today's <code>output</code>. Today's <code>next</code> value thus comes from yesterday, unless there was no yesterday, in which case it's 0. At a lower level, this whole setup works because of Haskell's laziness. Haskell computes by a demand-driven strategy, so if there is a sequential order of tasks which respects causality, Haskell will find it. Here, the <code>delay</code> establishes such an order. Be aware, though, that Haskell's type system gives you very little help in ensuring that such an order exists. You're free to use loops for utter nonsense! So your question is far from trivial. Each time you read or write such a program, you do need to think ‘how can this possibly work?’. You need to check that <code>delay</code> (or similar) is used appropriately to ensure that information is demanded only when it can be computed. Note that constructors, especially <code>(:)</code> can act like delays, too: it's not unusual to compute the tail of a list, apparently given the whole list (but being careful only to inspect the head). Unlike imperative programming, the lazy functional style allows you to organize your code around concepts other than the sequence of events, but it's a freedom that demands a more subtle awareness of time.

36,533,739

Run function when an ionic 2 page has fully loaded

Is there a way to determine when an ionic 2 page has fully loaded? I need to insert some html into the page when all of the page html has been loaded. Ideally I would like to have a function in my @page class that runs when the page has been loaded. At the moment I am inserting an iframe containing a vine into a div container. I am experiencing, when running the app on an iPhone 5 running iOS 9, some peculiar behaviour where the same vine sometimes sizes to the container and sometimes doesn't. I am guessing that this might be due to timing (the source for the vine iframe is received as part of an http request).

36,534,687

2

1

null

2016-04-10 18:25:04.903 UTC

2

2019-03-27 08:13:32.227 UTC

null

1,726,579

null

1

12

ios|iframe|ionic-framework|angular|ionic2

39,021

You can use the <code>ionViewDidLoad</code> method: <pre><code>@Page({ templateUrl: 'build/pages/somepage/somepage.html' }) export class SomePage { constructor() { // ... } ionViewDidLoad() { // Put here the code you want to execute } } </code></pre> The lifecycle events as November 18, 2016 are: <ul> <li>ionViewDidLoad</li> <li>ionViewWillEnter</li> <li>ionViewDidEnter</li> <li>ionViewWillLeave</li> <li>ionViewDidLeave</li> <li>ionViewWillUnload</li> <li>ionViewCanEnter</li> </ul> Since Ionic 2 is in active development, things change all the time. If you would like to check the current lifecycle events, please refer to: <a href="https://ionicframework.com/docs/v2/api/navigation/NavController/#lifecycle-events" rel="noreferrer">https://ionicframework.com/docs/v2/api/navigation/NavController/#lifecycle-events</a>

28,420,724

How to determine the intended frame-rate on an html video element

Is there a way to determine the intended frame rate of content playing in the html video element? Does the video element even know the intended FPS or frame count, or does it simply "guess" (maybe 24fps) and play at the guessed speed? Here are my unsuccessful attempts: <ul> <li>Look for a FPS or FrameCount property on the video element itself--Nope!</li> <li>Look for cross-video-format header info about FPS or FrameCount--Nothing consistent!</li> <li>Look for an event that is triggered upon frame changing--Nope!</li> </ul> My next attempt is more complicated: Sample the video by capturing frames to a canvas element and count frames by determining when the pixels change. Does anyone have a simpler answer before I do the complicated attempt?

28,455,790

3

2

null

2015-02-09 22:32:41.493 UTC

11

2022-07-24 12:38:09.737 UTC

2015-02-09 22:50:52.227 UTC

null

411,591

null

411,591

null

1

23

javascript|html|video|canvas

25,413

Knowing the frame-rate of the video wouldn't be as useful as you might think. Browsers uses of some tricks to make a match between the frame-rate of the movie and the refresh-rate of the screen, so if you look at <code>currentTime</code> property, you'll see that the actual frame duration ( == <code>currentTime</code> - previous <code>currentTime</code>) is not a constant, it varies from frame to frame. On this sample video : <a href="http://jsfiddle.net/3qs46n4z/3/" rel="noreferrer">http://jsfiddle.net/3qs46n4z/3/</a> the pattern is : 4-1-5-1 : 4 frames at 21.3 + 1 frame at 32 + 5 frames at 21.3 + 1 frame at 32. So if you want to always display the latest frame on a canvas while avoiding overdraw, the solution might be to : - On each rAF, look at the current time of the video : • Same ? -> do nothing. • Changed ? -> update frame. And whatever you want to do, comparing two currentTime === two numbers might be faster than comparing two imageDatas ;-) Edit : looking into the specifications to find evidence of my saying, i found a nuance with this Note : <pre><code> Which frame in a video stream corresponds to a particular playback position is defined by the video stream's format. </code></pre> (Note of 4.8.6 at <a href="http://www.w3.org/TR/2011/WD-html5-20110113/video.html" rel="noreferrer">http://www.w3.org/TR/2011/WD-html5-20110113/video.html</a> ) So strictly saying we can only say that (the current time is the same) implies (the frames are identical). I can only bet that the reciprocal is true => different time means different frame. In the example above, Chrome is trying to match the 24Hz of the movie on my 60Hz computer by trying to get 45 Hz ( = 60 / 2 + 60 / 4), the nearest from 48 = 2*24. For the 21 created frames i don't know if it interpolates or merely duplicates the frames. It surely changes depending on browser/device (Gpu especially). I bet any recent desktop or powerful smartphone does interpolate. Anyway given the high cost of checking with the imageData, you'd much better draw twice than check. Rq1 : I wonder to which extent using Xor mode + testing against 0 32 bits at a time could boost the compare time. (getImageData is slow.) Rq2 : I'm sure there's a hacky way to use the playback rate to 'sync' the video and the display, and to know which frame is a genuine ( == not interpolated ) frame. ( so two pass here 1) sync 2) rewind and retrieve frames). Rq3 : If your purpose is to get each and every video frame and only the video's frame, a browser is not the way to go. As explained above, the (desktop) browsers do interpolate to match as closely as possible the display frame rate. Those frames were not in the original stream. There are even some high-end '3D' (2D+time) interpolation devices where the initial frames are not even meant to be displayed (! ). On the other hand, if you are okay with the (interpolated) output stream, polling on rAF will provide every frames that you see (you can't miss a frame (except obviously your app is busy doing something else) . Rq4 : interpolation ( == no duplicate frames ) is 99.99% likely on recent/decent GPU powered desktop. Rq5 : Be sure to warm your functions (call them 100 times on start) and to create no garbage to avoid jit / gc pauses.

20,368,832

Address family not supported by protocol

The following code is a socket programming sample for a TCP client. But when I run this, connect() is returned as Address family not supported by protocol. I have heard, this problem will happen if the platform does not support ipv6. But AF_INET I wrote is ipv4. Also my server, that is CentOS6.4, is configured within an inet6 addr . Does anyone know why? <pre><code>#include <stdio.h> #include <string.h> #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> int main(){ struct sockaddr_in server; int sock; char buf[32]; int n; sock = socket(AF_INET,SOCK_STREAM,0); perror("socket"); server.sin_family = AF_INET; server.sin_port = htons(12345); inet_pton(AF_INET,"127.0.0.1",&server,sizeof(server)); connect(sock,(struct sockaddr *)&server,sizeof(server)); perror("connect"); memset(buf,0,sizeof(buf)); n = read(sock,buf,sizeof(buf)); perror("read"); printf("%d,%s\n",n,buf); close(sock); return 0; } </code></pre>

20,369,264

3

0

null

2013-12-04 06:46:59.26 UTC

4

2021-07-08 19:04:00.423 UTC

null

3,739,391

null

1,345,414

null

1

17

c|sockets|centos|ipv6

116,880

The code passes the wrong destination address and wrong number of arguments to <code>inet_pton()</code>. (For the latter the compiler should have warned you about, btw) This line <pre><code> inet_pton(AF_INET, "127.0.0.1", &server, sizeof(server)); </code></pre> should be <pre><code> inet_pton(AF_INET, "127.0.0.1", &server.sin_addr); </code></pre> Verbatim from <a href="http://man7.org/linux/man-pages/man3/inet_pton.3.html" rel="noreferrer"><code>man inet_pton</code></a>: <blockquote> int inet_pton(int af, const char *src, void *dst); AF_INET [...] The address is converted to a struct in_addr and copied to dst, which must be sizeof(struct in_addr) (4) bytes (32 bits) long. </blockquote> <hr> Not related to the problem, but also an issue, is that <code>read()</code> returns <code>ssize_t</code> not <code>int</code>. The following lines shall be adjusted: <pre><code>int n; [...] printf("%d, %s\n", n, buf); </code></pre> to become: <pre><code>ssize_t n; [...] printf("%zd, %s\n", n, buf); </code></pre>

20,357,960

Drawing selection box (rubberbanding, marching ants) in Cocoa, ObjectiveC

I've currently implemented a simple selection box using mouse events and redrawing a rectangle on mouse drag. Here's my code: <pre><code>-(void)drawRect:(NSRect)dirtyRect { if (!NSEqualRects(self.draggingBox, NSZeroRect)) { [[NSColor grayColor] setStroke]; [[NSBezierPath bezierPathWithRect:self.draggingBox] stroke]; } } #pragma mark Mouse Events - (void)mouseDown:(NSEvent *)theEvent { NSPoint pointInView = [self convertPoint:[theEvent locationInWindow] fromView:nil]; self.draggingBox = NSMakeRect(pointInView.x, pointInView.y, 0, 0); [self setNeedsDisplay:YES]; } - (void)mouseDragged:(NSEvent *)theEvent { NSPoint pointInView = [self convertPoint:[theEvent locationInWindow] fromView:nil]; _draggingBox.size.width = pointInView.x - (self.draggingBox.origin.x); _draggingBox.size.height = pointInView.y - (self.draggingBox.origin.y); [self setNeedsDisplay:YES]; } - (void)mouseUp:(NSEvent *)theEvent { self.draggingBox = NSZeroRect; [self setNeedsDisplay:YES]; } </code></pre> Ref: <a href="http://cocoadev.com/HowToCreateWalkingAnts">http://cocoadev.com/HowToCreateWalkingAnts</a> Questions: Is this the most efficient way to do this? If the view was complex, would it be more efficient to draw a transparent view over the main view instead of continuously redrawing the view for the duration of the mouse drag (<a href="http://www.cocoabuilder.com/archive/cocoa/99877-drawing-selection-rectangle.html">http://www.cocoabuilder.com/archive/cocoa/99877-drawing-selection-rectangle.html</a>)? How is this done? I can't seem to find any examples.

20,359,552

4

0

null

2013-12-03 17:38:05 UTC

13

2020-04-20 02:26:05.027 UTC

2013-12-03 18:42:52.44 UTC

null

959,476

null

959,476

null

1

13

objective-c|macos|cocoa|nsview

5,068

You can use QuartzCore to animate the "marching ants" for you, if you want. This gets you completely out of the world of manually drawing the rubber-banded selection box, too. You just define the path that defines that box, and let Core Animation take care of drawing the box, as well as animating it. In the XIB's "View Effects" Inspector, turn on "Core Animation", and then you can do something like: <pre><code>#import <QuartzCore/QuartzCore.h> #import "CustomView.h" @interface CustomView () @property (nonatomic) NSPoint startPoint; @property (nonatomic, strong) CAShapeLayer *shapeLayer; @end @implementation CustomView #pragma mark Mouse Events - (void)mouseDown:(NSEvent *)theEvent { self.startPoint = [self convertPoint:[theEvent locationInWindow] fromView:nil]; // create and configure shape layer self.shapeLayer = [CAShapeLayer layer]; self.shapeLayer.lineWidth = 1.0; self.shapeLayer.strokeColor = [[NSColor blackColor] CGColor]; self.shapeLayer.fillColor = [[NSColor clearColor] CGColor]; self.shapeLayer.lineDashPattern = @[@10, @5]; [self.layer addSublayer:self.shapeLayer]; // create animation for the layer CABasicAnimation *dashAnimation; dashAnimation = [CABasicAnimation animationWithKeyPath:@"lineDashPhase"]; [dashAnimation setFromValue:@0.0f]; [dashAnimation setToValue:@15.0f]; [dashAnimation setDuration:0.75f]; [dashAnimation setRepeatCount:HUGE_VALF]; [self.shapeLayer addAnimation:dashAnimation forKey:@"linePhase"]; } - (void)mouseDragged:(NSEvent *)theEvent { NSPoint point = [self convertPoint:[theEvent locationInWindow] fromView:nil]; // create path for the shape layer CGMutablePathRef path = CGPathCreateMutable(); CGPathMoveToPoint(path, NULL, self.startPoint.x, self.startPoint.y); CGPathAddLineToPoint(path, NULL, self.startPoint.x, point.y); CGPathAddLineToPoint(path, NULL, point.x, point.y); CGPathAddLineToPoint(path, NULL, point.x, self.startPoint.y); CGPathCloseSubpath(path); // set the shape layer's path self.shapeLayer.path = path; CGPathRelease(path); } - (void)mouseUp:(NSEvent *)theEvent { [self.shapeLayer removeFromSuperlayer]; self.shapeLayer = nil; } @end </code></pre> This way, Core Animation takes care of the marching ants for you. <img src="https://i.stack.imgur.com/5dDND.gif" alt="marching ants demo">

20,123,147

Add line break to axis labels and ticks in ggplot

I'm looking for a way to use long variable names on the x axis of a plot. Of course I could use a smaller font or rotate them a little but I would like keep them vertical and readable. As an example: <pre><code>df <- data.frame(a=LETTERS[1:20], b=rnorm(20), c=rnorm(20), d=rnorm(20)) df_M <- melt(df, id="a") plot <- ggplot(data=df_M, aes(x=variable, y=a, fill=value)) + geom_tile() + scale_fill_gradient(low="green", high="red") plot </code></pre> here the x axis is just letters, but if I want to use the full name, the names use a disproportionate amount of space: <pre><code> plot + theme(axis.text.x=element_text(angle=90)) + scale_x_discrete(breaks=unique(df_M$variable), labels=c("Ambystoma mexicanum", "Daubentonia madagascariensis", "Psychrolutes marcidus")) </code></pre> So I would like to put a line break in the labels. Preferably in ggplot2 but other solutions are welcome of course. Thanks!

20,123,502

5

0

null

2013-11-21 14:09:10.147 UTC

16

2022-09-02 14:12:30.023 UTC

2019-02-07 11:01:14.87 UTC

null

1,951,485

null

2,997,794

null

1

34

r|ggplot2

69,079

You can add your own formatter ( see <code>scales</code> package for more examples). Here I replace any space in your x labels by a new line. <pre><code>addline_format <- function(x,...){ gsub('\\s','\n',x) } myplot + scale_x_discrete(breaks=unique(df_M$variable), labels=addline_format(c("Ambystoma mexicanum", "Daubentonia madagascariensis", "Psychrolutes marcidus"))) </code></pre> <img src="https://i.stack.imgur.com/0Njda.png" alt="enter image description here">

5,634,097

How can I change the description of a existing changelist in command line?

The command "p4 change" prompts a editor and needs a form. But I want to do this in command line. How can I achieve this?

5,634,141

3

2

null

2011-04-12 10:57:51.5 UTC

1

2017-05-28 18:41:43.003 UTC

null

238,118

null

1

12

perforce

38,884

There's always the <code>-i</code> command: <blockquote> Read a changelist description from standard input. Input must be in the same format used by the p4 change form. </blockquote> As Bryan points out in his comment the best approach is probably to run <code>change -o</code>, redirect the output to a file, process the file with other shell commands, and then send that file back to the server with <code>change -i</code>. <a href="http://www.perforce.com/perforce/doc.current/manuals/cmdref/change.html#1040665" rel="noreferrer">Source</a> But you can always change the description when you submit: <blockquote> p4 submit -d "description" </blockquote> This only works on the default change list. <a href="http://www.perforce.com/perforce/doc.current/manuals/cmdref/submit.html" rel="noreferrer">Source</a>

6,258,556

org.hibernate.hql.ast.QueryTranslatorImpl list ATTENTION: firstResult/maxResults specified with collection fetch; applying in memory

I'm facing a problem, I have a query in JPA. as I have some collections I need to use left join fetch or inner join fetch My problem is in using the <code>setFirstResult</code> and <code>setMaxResult</code> in order to bring back a precise number of result. every time i see the whole result is bring back AND only AFTER the maxResult is used. Is there any way to make the maxResult before ? Thanks a lot ! here it is more information : my problem is when i use that : <pre><code>startIndex = 0; maxResults = 10; query.setFirstResult(startIndex); query.setMaxResults(maxResults); </code></pre> I see this message in my log : <blockquote> 7 juin 2011 09:52:37 org.hibernate.hql.ast.QueryTranslatorImpl list ATTENTION: firstResult/maxResults specified with collection fetch; applying in memory! </blockquote> I see the 200 result coming back (in log) and after in the HashSet i have finally the 10 result i ask. its seems in memory is bring back the 200 result and after the maxResults is applied in memory. I'm searching if there is any way to be able to fetch and limit the number of result. I used a workaround, I make a first query to ask the id of my order , without any fetch, used the maxResult. everything work perfectly it's used the limit instruction. After I use my "big" query with the fetch and limit the result inside the list of id bring back in the first one. here it is my full query without my workaround (notice that there is no limit generated as talk by @Bozho ): <pre class="lang-sql prettyprint-override"><code>select o from Order o left join fetch o.notes note left join fetch o.orderedBy orderedBy left join fetch orderedBy.address addressOrdered left join fetch orderedBy.language orderedByLg left join fetch orderedByLg.translations orderedByLgTtrad left join fetch o.deliveredTo deliveredTo left join fetch deliveredTo.address addressDelivered left join fetch deliveredTo.language deliveredToLg left join fetch deliveredToLg.translations left join fetch o.finalReceiptPlace finalReceiptPlace left join fetch finalReceiptPlace.address addressFinalReceiptPlace left join fetch finalReceiptPlace.language finalReceiptPlaceLg left join fetch finalReceiptPlaceLg.translations inner join fetch o.deliveryRoute delivery left join fetch delivery.translations inner join fetch o.type orderType left join fetch orderType.translations inner join fetch o.currency currency left join fetch currency.translations left join fetch o.attachments left join fetch note.origin orig left join fetch orig.translations left join fetch o.supplier sup left join fetch sup.department dep left join fetch o.stateDetail stateD inner join fetch stateD.state stat where 1=1 and o.entryDate >= :startDat </code></pre>

10,727,653

3

4

null

2011-06-06 22:03:35.417 UTC

10

2018-01-16 21:26:51.61 UTC

2014-05-08 00:16:22.423 UTC

null

1,391,249

null

359,281

null

1

13

hibernate|jpa

16,526

<blockquote> TL;DR Hibernate doesn't know how many rows of the flattened, joined query it needs to get the specified number of the Order objects, so it has to load the whole query in memory. See below for an explanation. </blockquote> To understand why Hibernate does this, you need to understand how Hibernate does the ORM (Object-Relational Mapping) involved for JPA Entities. Consider a simplified set of Entities for your order. Class <code>Order</code> contains 2 fields: <code>number</code> and <code>customerId</code> and a list of order lines. Class <code>OrderLine</code> contains <code>productCode</code> and <code>quantity</code> fields, as well as a <code>uid</code> key and a reference to the parent Order. These classes may be defined thus: <pre><code>@Entity @Table(name = "ORDER") public class Order { @ID @Column(name = "NUMBER") private Integer number; @Column(name = "CUSTOMER_ID") private Integer customerId; @OneToMany(mappedBy = "order", fetch = FetchType.LAZY) @OrderBy private List<OrderLine> orderLineList; .... // Rest of the class } @Entity @Table(name = "ORDER_LINE") public class OrderLine { @ID @Column(name = "UID") private Integer uid; @Column(name = "PRODUCT_CODE") private Integer productCode; @Column(name = "QUANTITY") private Integer quantity; @Column(name = "ORDER_NUMBER") private Integer orderNumber; @ManyToOne(fetch = FetchType.LAZY, optional = false) @JoinColumn(name = "ORDER_NUMBER", referencedColumnName = "NUMBER", insertable = false, updatable = false) private Order order; .... // Rest of the class } </code></pre> Now, if you performed the following JPQL query on these Entities: <pre><code>SELECT o FROM Order o LEFT JOIN FETCH o.orderLineList </code></pre> then Hibernate performs this query as a 'flattened' SQL query similar to the following: <pre><code>SELECT o.number, o.customer_id, ol.uid, ol.product_code, ol.quantity, ol.order_number FROM order o LEFT JOIN order_line ol ON order_line.order_number = order.number </code></pre> which would give a result like this: <pre><code>| o.number | o.customer_id | ol.uid | ol.product_code | ol.quantity | |==========|===============|========|=================|=============| | 1 | 123 | 1 | 1111 | 5 | | 1 | 123 | 2 | 1112 | 6 | | 1 | 123 | 3 | 1113 | 1 | | 2 | 123 | 4 | 1111 | 2 | | 2 | 123 | 5 | 1112 | 7 | | 3 | 123 | 6 | 1111 | 6 | | 3 | 123 | 7 | 1112 | 5 | | 3 | 123 | 8 | 1113 | 3 | | 3 | 123 | 9 | 1114 | 2 | | 3 | 123 | 10 | 1115 | 9 | ...etc </code></pre> which Hibernate would use to 'reconstruct' <code>Order</code> objects with attached lists of <code>OrderLine</code> sub-objects. However, since the number of order lines per order is random, there is no way for Hibernate to know how many rows of this query to take to get the specified maximum number of <code>Order</code> objects required. So it has to take the whole query and build up the objects in memory until it has the right amount, before discarding the rest of the result set. The log warning it produces alludes to this: <pre><code>ATTENTION: firstResult/maxResults specified with collection fetch; applying in memory! </code></pre> We're only just discovering now that these queries can have a significant impact on server memory use, and we've had issues with our server falling over with out of memory errors when these queries are attempted. By the way, I will say now that this is mostly just theory on my part and I have no idea how the actual Hibernate code works. Most of this you can glean from the logs when you have Hibernate logging the SQL statements it generates. <hr> UPDATE: Recently I have discovered a little 'gotcha' with the above. Consider a third Entity called <code>Shipment</code> which is for one or more Lines of an Order. The <code>Shipment</code> entity would have a <code>@ManyToOne</code> association to the <code>Order</code> entity. Let's say you have 2 Shipments for the same Order which has 4 Lines. If you perform a JPQL query for the following: <pre><code>SELECT s FROM Shipment s LEFT JOIN s.order o LEFT JOIN FETCH o.orderLineList </code></pre> You would expect (or at least I did) to get 2 shipment objects back, each with a reference to the same Order object, which itself would contain the 4 Lines. Nope, wrong again! In fact, you get 2 Shipment objects, each referring to the same Order object, which contains 8 Lines! Yes, the Lines get duplicated in the Order! And yes, that is even if you specify the DISTINCT clause. If you research this issue here on SO or elsewhere (most notably the Hibernate forums), you'll find that this is actually a feature not a bug, according to the Hibernate powers that be. Some people actually want this behaviour! Go figure.

5,768,316

pop a specific element off a vector in c++

so suppose I have a vector called v and it has three elements: 1,2,3 is there a way to specifically pop 2 from the vector so the resulting vector becomes 1,3

5,768,347

4

0

null

2011-04-24 02:38:12.093 UTC

4

2011-04-24 02:59:09.507 UTC

null

380,714

null

1

24

c++|vector

62,909

Assuming you're looking for the element containing the value <code>2</code>, not the value at index <code>2</code>. <pre><code>#include<vector> #include<algorithm> int main(){ std::vector<int> a={1,2,3}; a.erase(std::find(a.begin(),a.end(),2)); } </code></pre> (I used C++0x to avoid some boilerplate, but the actual use of <code>std::find</code> and <code>vector::erase</code> doesn't require C++0x)

5,664,345

String to Binary in C#

I have a function to convert string to hex as this, <pre><code>public static string ConvertToHex(string asciiString) { string hex = ""; foreach (char c in asciiString) { int tmp = c; hex += String.Format("{0:x2}", (uint)System.Convert.ToUInt32(tmp.ToString())); } return hex; } </code></pre> Could you please help me write another string to Binary function based on my sample function? <pre><code>public static string ConvertToBin(string asciiString) { string bin = ""; foreach (char c in asciiString) { int tmp = c; bin += String.Format("{0:x2}", (uint)System.Convert.????(tmp.ToString())); } return bin; } </code></pre>

5,664,400

4

3

null

2011-04-14 13:57:14.343 UTC

10

2019-09-21 04:46:54.687 UTC

2011-04-14 14:28:24.727 UTC

null

6,461

null

159,818

null

1

28

c#|string|binary|types

128,042

Here you go: <pre><code>public static byte[] ConvertToByteArray(string str, Encoding encoding) { return encoding.GetBytes(str); } public static String ToBinary(Byte[] data) { return string.Join(" ", data.Select(byt => Convert.ToString(byt, 2).PadLeft(8, '0'))); } // Use any sort of encoding you like. var binaryString = ToBinary(ConvertToByteArray("Welcome, World!", Encoding.ASCII)); </code></pre>

6,178,366

backbone.js fetch results cached

I am using fetch in the index action of the following backbone.js controller: <pre><code>App.Controllers.PlanMembers = Backbone.Controller.extend({ routes: { "": "index" }, index: function () { var planMembers = new App.Collections.PlanMembers(); planMembers.fetch({ success: function () { var recoveryTeam = planMembers.select(function (planMember) { return planMember.get("TeamMemberRole") == "RecoveryTeam"; }); var otherMembers = planMembers.select(function (planMember) { return planMember.get("TeamMemberRole") == "Other"; }); new App.Views.Index({ collection: { name: "Team", members: recoveryTeam }, el: $('#recoveryTeam') }); new App.Views.Index({ collection: { name: "Team", members: otherMembers }, el: $('#otherTeam') }); }, error: function () { alert('failure'); showErrorMessage("Error loading planMembers."); } }); } }); </code></pre> The problem is that the results are being cached. It does not pick up database changes. Is there anyway to tell backbone.js not to cache the results? I know I could override the url of the collection and append a timestamp but I am looking for something a bit cleaner than that.

6,188,929

4

1

null

2011-05-30 15:55:15.99 UTC

12

2016-04-09 18:01:40.303 UTC

2011-05-30 16:19:00.92 UTC

null

489,560

null

11,755

null

1

41

backbone.js

25,235

This is a problem on IE usually and backbone has nothing to do with it. You have to go down to the jQuery ajax call and look at the doc. Backbone uses jquery ajax for its sync method. You can do something like this to force ajax call on all browsers: <pre><code>$.ajaxSetup({ cache: false }); </code></pre> <a href="http://api.jquery.com/jQuery.ajaxSetup/">http://api.jquery.com/jQuery.ajaxSetup/</a>

1,522,778

maven-assembly plugin - how to create nested assemblies

I have a project whereby I'm trying to create a distribution zip file, which contains (amongst other files) an executable jar with dependencies of my java project. So I sort of want it to look like this: <pre><code>-wiki-search-1.0.0-dist.zip -wiki-search.bat -wiki-search-help.html -wiki-search-1.0.0-jar-with-dependencies.jar -jar content... </code></pre> I'm using the assembly plugin, and the predefined descriptor "jar-with-dependencies" to create my executable jar file. I'm specifying a separate assembly plugin entry in my pom, referencing a custom descriptor to try and build the distributable zip file. So the part of my pom looks like this: <pre><code><plugin> <artifactId>maven-assembly-plugin</artifactId> <configuration> <descriptorRefs> <descriptorRef>jar-with-dependencies</descriptorRef> </descriptorRefs> <archive> <manifest> <mainClass>quicksearch.QuickSearchApp</mainClass> </manifest> </archive> </configuration> <executions> <execution> <id>make-assembly</id> <phase>package</phase> <goals> <goal>attached</goal> </goals> </execution> </executions> </plugin> <plugin> <artifactId>maven-assembly-plugin</artifactId> <configuration> <descriptors> <descriptor>src/main/assembly/dist.xml</descriptor> </descriptors> </configuration> <executions> <execution> <id>make-assembly</id> <phase>package</phase> <goals> <goal>attached</goal> </goals> </execution> </executions> </plugin> </code></pre> And my custom descriptor looks like this: <pre><code><assembly> <id>dist</id> <formats> <format>tar.gz</format> <format>tar.bz2</format> <format>zip</format> </formats> <fileSets> <fileSet> <includes> <include>${project.basedir}/target/wiki-search-0.0.1-SNAPSHOT-jar-with-dependencies.jar</include> </includes> <outputDirectory>.</outputDirectory> </fileSet> <fileSet> <directory>${project.basedir}/src/main/etc</directory> <includes> <include>*</include> </includes> <outputDirectory></outputDirectory> </fileSet> </fileSets> </assembly> </code></pre> Everything works fine. The jar-with-dependencies is being built. My dist zip file is being built. But the dist zip file does not contain the jar-with-dependencies file.

1,524,113

2

0

null

2009-10-05 22:40:25.347 UTC

16

2015-07-03 11:28:16.6 UTC

null

2,630,337

null

26,633

null

1

31

maven-2

12,576

With your existing configuration, your two separate configurations for the assembly plugin will be merged, and the configurations will also be merged. To achieve your goal you should define a single assembly-plugin configuration with multiple nested executions, then define the configuration for each execution inside it. The assembly plugin will then execute each assembly sequentially, so the <code>jar-with-dependencies</code> jar will be available for inclusion in the <code>dist</code> jar. Also note the <code>attached</code> goal is deprecated in favour of the <code>single</code> goal. Also note that paths in the assembly are relative to the root, and to include a particular file you should use the <code><files></code> element rather than the <code><filesets></code> element. You can also specify properties in the assembly to make it less fragile to change. The rearranged configuration and assembly below should do what you're after: Assembly descriptor: <pre><code><assembly> <id>dist</id> <formats> <format>tar.gz</format> <format>tar.bz2</format> <format>zip</format> </formats> <files> <file> <source> target/${project.artifactId}-${project.version}-jar-with-dependencies.jar </source> <outputDirectory>/</outputDirectory> </file> </files> <fileSets> <fileSet> <directory>${project.basedir}/src/main/resources</directory> <includes> <include>*</include> </includes> <outputDirectory>/</outputDirectory> </fileSet> </fileSets> </assembly> </code></pre> Assembly plugin: <pre><code><plugin> <artifactId>maven-assembly-plugin</artifactId> <executions> <execution> <id>jar-with-dependencies</id> <phase>package</phase> <goals> <goal>single</goal> </goals> <configuration> <descriptorRefs> <descriptorRef>jar-with-dependencies</descriptorRef> </descriptorRefs> <archive> <manifest> <mainClass>quicksearch.QuickSearchApp</mainClass> </manifest> </archive> </configuration> </execution> <execution> <id>dist</id> <phase>package</phase> <goals> <goal>single</goal> </goals> <configuration> <descriptors> <descriptor>src/main/assembly/dist.xml</descriptor> </descriptors> </configuration> </execution> </executions> </plugin> </code></pre>

1,530,736

How to print a null-terminated string with newlines without showing backslash escapes in gdb?

I have a variable <pre><code>char* x = "asd\nqwe\n ... " </code></pre> and I want to print it with newlines printed as newlines not backslash n. Is it possible?

1,530,774

2

4

null

2009-10-07 10:23:42.11 UTC

11

2015-07-21 11:41:58.503 UTC

2015-06-23 09:25:24.687 UTC

null

895,245

null

61,342

null

1

63

c|debugging|gdb

98,222

Update: Why not just use the gdb <code>printf</code> command? <pre><code>(gdb) printf "%s", x asd qwe ... (gdb) </code></pre> <hr> Old answer: From within the debugger you can execute commands. Just call <code>printf</code> <pre><code>(gdb) call printf("%s", x) asd qwe ... (gdb) </code></pre>

59,606,449

kubectl how to rename a context

I have many contexts, one for staging, one for production, and many for dev clusters. Copy and pasting the default cluster names is tedious and hard, especially over time. How can I rename them to make context switching easier?

59,606,450

2

0

null

2020-01-06 03:48:37.727 UTC

4

2021-06-17 12:59:52.5 UTC

null

5,838,056

null

1

35

kubectl

16,573

Renaming contexts is easy! <pre><code>$ kubectl config rename-context old-name new-name </code></pre> Confirm the change by <pre><code>$ kubectl config get-contexts </code></pre>

5,890,499

PCM audio amplitude values?

I am starting out with audio recording using my Android smartphone. I successfully saved voice recordings to a PCM file. When I parse the data and print out the signed, 16-bit values, I can create a graph like the one below. However, I do not understand the amplitude values along the y-axis. <ol> <li>What exactly are the units for the amplitude values? The values are signed 16-bit, so they must range from -32K to +32K. But what do these values represent? Decibels? </li> <li>If I use 8-bit values, then the values must range from -128 to +128. How would that get mapped to the volume/"loudness" of the 16-bit values? Would you just use a 16-to-1 quantisation mapping?</li> <li>Why are there negative values? I would think that complete silence would result in values of 0.</li> </ol> If someone can point me to a website with information on what's being recorded, I would appreciate it. I found <a href="https://ccrma.stanford.edu/courses/422/projects/WaveFormat/" rel="noreferrer">webpages</a> on the PCM file format, but not what the data values are. <img src="https://i.stack.imgur.com/W6SL8.png" alt="enter image description here">

5,891,128

5

2

null

2011-05-04 22:14:55.4 UTC

21

2014-04-11 14:01:09.613 UTC

2011-05-05 01:50:00.65 UTC

null

4,561,314

null

4,561,314

null

1

35

iphone|android|audio|audio-recording|pcm

17,732

Think of the surface of the microphone. When it's silent, the surface is motionless at position zero. When you talk, that causes the air around your mouth to vibrate. Vibrations are spring like, and have movement in both directions, as in back and forth, or up and down, or in and out. The vibrations in the air cause the microphone surface to vibrate as well, as in move up and down. When it moves down, that might be measured or sampled a positive value. When it moves up that might be sampled as a negative value. (Or it could be the opposite.) When you stop talking the surface settles back down to the zero position. What numbers you get from your PCM recording data depend on the gain of the system. With common 16 bit samples, the range is from -32768 to 32767 for the largest possible excursion of a vibration that can be recorded without distortion, clipping or overflow. Usually the gain is set a bit lower so that the maximum values aren't right on the edge of distortion. ADDED: 8-bit PCM audio is often an unsigned data type, with the range from 0..255, with a value of 128 indicating "silence". So you have to add/subtract this bias, as well as scale by about 256 to convert between 8-bit and 16-bit audio PCM waveforms.

6,309,472

matplotlib: can I create AxesSubplot objects, then add them to a Figure instance?

Looking at the <code>matplotlib</code> documentation, it seems the standard way to add an <code>AxesSubplot</code> to a <code>Figure</code> is to use <code>Figure.add_subplot</code>: <pre><code>from matplotlib import pyplot fig = pyplot.figure() ax = fig.add_subplot(1,1,1) ax.hist( some params .... ) </code></pre> I would like to be able to create <code>AxesSubPlot</code>-like objects independently of the figure, so I can use them in different figures. Something like <pre><code>fig = pyplot.figure() histoA = some_axes_subplot_maker.hist( some params ..... ) histoA = some_axes_subplot_maker.hist( some other params ..... ) # make one figure with both plots fig.add_subaxes(histo1, 211) fig.add_subaxes(histo1, 212) fig2 = pyplot.figure() # make a figure with the first plot only fig2.add_subaxes(histo1, 111) </code></pre> Is this possible in <code>matplotlib</code> and if so, how can I do this? Update: I have not managed to decouple creation of Axes and Figures, but following examples in the answers below, can easily re-use previously created axes in new or olf Figure instances. This can be illustrated with a simple function: <pre><code>def plot_axes(ax, fig=None, geometry=(1,1,1)): if fig is None: fig = plt.figure() if ax.get_geometry() != geometry : ax.change_geometry(*geometry) ax = fig.axes.append(ax) return fig </code></pre>

6,309,636

5

1

null

2011-06-10 16:38:43.09 UTC

41

2020-12-20 18:35:38.283 UTC

2011-06-12 08:13:14.627 UTC

null

661,519

null

661,519

null

1

99

python|matplotlib

92,201

Typically, you just pass the axes instance to a function. For example: <pre><code>import matplotlib.pyplot as plt import numpy as np def main(): x = np.linspace(0, 6 * np.pi, 100) fig1, (ax1, ax2) = plt.subplots(nrows=2) plot(x, np.sin(x), ax1) plot(x, np.random.random(100), ax2) fig2 = plt.figure() plot(x, np.cos(x)) plt.show() def plot(x, y, ax=None): if ax is None: ax = plt.gca() line, = ax.plot(x, y, 'go') ax.set_ylabel('Yabba dabba do!') return line if __name__ == '__main__': main() </code></pre> To respond to your question, you could always do something like this: <pre><code>def subplot(data, fig=None, index=111): if fig is None: fig = plt.figure() ax = fig.add_subplot(index) ax.plot(data) </code></pre> Also, you can simply add an axes instance to another figure: <pre><code>import matplotlib.pyplot as plt fig1, ax = plt.subplots() ax.plot(range(10)) fig2 = plt.figure() fig2.axes.append(ax) plt.show() </code></pre> Resizing it to match other subplot "shapes" is also possible, but it's going to quickly become more trouble than it's worth. The approach of just passing around a figure or axes instance (or list of instances) is much simpler for complex cases, in my experience...

5,978,510

Regex to match Date

I want to match dates with format mm/dd/yy or mm/dd/yyyy but it should not pick 23/09/2010 where month is 23 which is invalid nor some invalid date like 00/12/2020 or 12/00/2011.

5,978,549

7

2

null

2011-05-12 13:13:37.377 UTC

9

2020-04-21 16:06:17.503 UTC

2011-05-12 17:18:17.587 UTC

null

405,017

null

422,543

null

1

17

ruby|regex

29,970

You'd better do a split on / and test all individual parts. But if you really want to use a regex you can try this one : <pre><code>#\A(?:(?:(?:(?:0?[13578])|(1[02]))/31/(19|20)?\d\d)|(?:(?:(?:0?[13-9])|(?:1[0-2]))/(?:29|30)/(?:19|20)?\d\d)|(?:0?2/29/(?:19|20)(?:(?:[02468][048])|(?:[13579][26])))|(?:(?:(?:0?[1-9])|(?:1[0-2]))/(?:(?:0?[1-9])|(?:1\d)|(?:2[0-8]))/(?:19|20)?\d\d))\Z# </code></pre> Explanation: <pre><code>\A # start of string (?: # group without capture # that match 31st of month 1,3,5,7,8,10,12 (?: # group without capture (?: # group without capture (?: # group without capture 0? # number 0 optionnal [13578] # one digit either 1,3,5,7 or 8 ) # end group | # alternative (1[02]) # 1 followed by 0 or 2 ) # end group / # slash 31 # number 31 / # slash (19|20)? #numbers 19 or 20 optionnal \d\d # 2 digits from 00 to 99 ) # end group | (?:(?:(?:0?[13-9])|(?:1[0-2]))/(?:29|30)/(?:19|20)?\d\d) | (?:0?2/29/(?:19|20)(?:(?:[02468][048])|(?:[13579][26]))) | (?:(?:(?:0?[1-9])|(?:1[0-2]))/(?:(?:0?[1-9])|(?:1\d)|(?:2[0-8]))/(?:19|20)?\d\d) ) \Z </code></pre> I've explained the first part, leaving the rest as an exercise. This match one invalid date : 02/29/1900 but is correct for any other dates between 01/01/1900 and 12/31/2099

5,651,902

Android plurals treatment of "zero"

If have the following plural ressource in my strings.xml: <pre><code> <plurals name="item_shop"> <item quantity="zero">No item</item> <item quantity="one">One item</item> <item quantity="other">%d items</item> </plurals> </code></pre> I'm showing the result to the user using: <pre><code>textView.setText(getQuantityString(R.plurals.item_shop, quantity, quantity)); </code></pre> It's working well with 1 and above, but if quantity is 0 then I see "0 items". Is "zero" value supported only in Arabic language as the documentation seems to indicate? Or am I missing something?

5,671,704

7

4

null

2011-04-13 15:39:59.517 UTC

28

2021-02-23 18:45:38.063 UTC

null

565,798

null

1

102

android

24,442

The Android resource method of internationalisation is quite limited. I have had much better success using the standard <code>java.text.MessageFormat</code>. Basically, all you have to do is use the standard string resource like this: <pre><code><resources> <string name="item_shop">{0,choice,0#No items|1#One item|1&lt;{0} items}</string> </resources> </code></pre> Then, from the code all you have to do is the following: <pre><code>String fmt = getResources().getText(R.string.item_shop).toString(); textView.setText(MessageFormat.format(fmt, amount)); </code></pre> You can read more about the format strings in the <a href="http://download.oracle.com/javase/6/docs/api/java/text/MessageFormat.html" rel="noreferrer">javadocs for MessageFormat</a>

39,019,094

ReactJS - get json object data from an URL

How do I get data from an URL into ReactJS. The url is of the following type: <a href="http://www.domain.com/api/json/x/a/search.php?s=category" rel="noreferrer">http://www.domain.com/api/json/x/a/search.php?s=category</a> which, if typed in a browser, will display a json object. How do I load it to ReactJS. To start with, I started by: <pre><code>const dUrl = "http://www.the...."; console.log(dUrl); </code></pre> but obviously it displays the url not the content (which, I will be able to filter - it's just this initial step of loading it into an object that I don't know) Edit: I'd rather not use jQuery.

39,019,646

5

1

null

2016-08-18 13:07:47.843 UTC

2

2019-03-22 06:56:12.397 UTC

2016-08-18 13:41:16.107 UTC

null

1,945,363

null

1,945,363

null

1

16

json|reactjs

69,349

Edit: Use fetch for making API calls. <pre><code>fetch(http://www.example.com/api/json/x/a/search.php?s=category) .then(response => response.json()) .then((jsonData) => { // jsonData is parsed json object received from url console.log(jsonData) }) .catch((error) => { // handle your errors here console.error(error) }) </code></pre> Fetch is available in all modern browsers.

44,077,630

Ansible to check diskspace for mounts mentioned as variable

I am new to ansible and currently working on a play which will see if disk space of remote machines has reached 70% threshold. If they have reached it should throw error. i found a good example at : <a href="https://stackoverflow.com/questions/26981907/using-ansible-to-manage-disk-space">Using ansible to manage disk space</a> but at this example the mount names are hard coded. And my requirement is to pass them dynamically. So i wrote below code which seems to not work: <pre><code> name: test for available disk space assert: that: - not {{ item.mount == '{{mountname}}' and ( item.size_available < item.size_total - ( item.size_total|float * 0.7 ) ) }} with_items: '{{ansible_mounts}}' ignore_errors: yes register: disk_free name: Fail the play fail: msg="disk space has reached 70% threshold" when: disk_free|failed </code></pre> This play works when i use: <pre><code>item.mount == '/var/app' </code></pre> Is there any way to enter mountname dynamically ? and can i enter multiple mount names ?? I am using ansible 2.3 on rhel Thanks in advance :)

44,078,311

3

0

null

2017-05-19 19:24:20.933 UTC

4

2018-12-07 11:31:38.217 UTC

2017-05-23 12:10:43.367 UTC

null

-1

null

5,374,696

null

1

7

ansible

39,827

Try this: <pre><code>name: Ensure that free space on {{ mountname }} is grater than 30% assert: that: mount.size_available > mount.size_total|float * 0.3 msg: disk space has reached 70% threshold vars: mount: "{{ ansible_mounts | selectattr('mount','equalto',mountname) | list | first }}" </code></pre> <ol> <li><code>that</code> is a raw Jinja2 expression, don't use curly brackets in it.</li> <li>why do you use separate <code>fail</code> task, if <code>assert</code> can fail with a message?</li> </ol>

24,912,173

Django 1.7 - makemigrations not detecting changes

As the title says, I can't seem to get migrations working. The app was originally under 1.6, so I understand that migrations won't be there initially, and indeed if I run <code>python manage.py migrate</code> I get: <pre><code>Operations to perform: Synchronize unmigrated apps: myapp Apply all migrations: admin, contenttypes, auth, sessions Synchronizing apps without migrations: Creating tables... Installing custom SQL... Installing indexes... Running migrations: No migrations to apply. </code></pre> If I make a change to any models in <code>myapp</code>, it still says unmigrated, as expected. But if I run <code>python manage.py makemigrations myapp</code> I get: <pre><code>No changes detected in app 'myapp' </code></pre> Doesn't seem to matter what or how I run the command, it's never detecting the app as having changes, nor is it adding any migration files to the app. Is there any way to force an app onto migrations and essentially say "This is my base to work with" or anything? Or am I missing something? My database is a PostgreSQL one if that helps at all.

24,929,525

33

1

null

2014-07-23 13:44:54.297 UTC

27

2022-09-13 07:11:32.98 UTC

2014-07-28 11:36:30.34 UTC

null

1,433,392

null

572,845

null

1

149

python|django|django-1.7|django-migrations

133,615

Ok, looks like I missed an obvious step, but posting this in case anyone else does the same. When upgrading to 1.7, my models became unmanaged (<code>managed = False</code>) - I had them as <code>True</code> before but seems it got reverted. Removing that line (To default to True) and then running <code>makemigrations</code> immediately made a migration module and now it's working. <code>makemigrations</code> will not work on unmanaged tables (Which is obvious in hindsight)

44,523,828

Initialization from incompatible pointer type warning when assigning to a pointer

GCC gives me an 'Initialization from incompatible pointer type' warning when I use this code (though the code works fine and does what it's supposed to do, which is print all the elements of the array). <pre><code>#include <stdio.h> int main(void) { int arr[5] = {3, 0, 3, 4, 1}; int *p = &arr; printf("%p\n%p\n\n", p); for (int a = 0; a < 5; a++) printf("%d ", *(p++)); printf("\n"); } </code></pre> However no warning is given when I use this bit of code <pre><code>int main(void) { int arr[5] = {3, 0, 3, 4, 1}; int *q = arr; printf("%p\n%p\n\n", q); for (int a = 0; a < 5; a++) printf("%d ", *(q++)); printf("\n"); } </code></pre> The only difference between these two snippets is that I assign *p = &arr and *q = arr . <ul> <li>Exactly what different is the & making ?</li> <li>And why does the code execute and give the exact same output in both the cases ?</li> </ul>

44,524,152

5

2

null

2017-06-13 14:02:43.057 UTC

2

2017-06-13 14:26:41.333 UTC

2017-06-13 14:13:46.85 UTC

null

7,609,016

null

7,609,016

null

1

17

c|arrays|pointers

48,364

<ul> <li><code>&arr</code> gives an array pointer, a special pointer type <code>int(*)[5]</code> which points at the array as whole.</li> <li><code>arr</code>, when written in an expression such a <code>int *q = arr;</code>, "decays" into a pointer to the first element. Completely equivalent to <code>int *q = &arr[0];</code></li> </ul> In the first case you try to assign a <code>int(*)[5]</code> to a <code>int*</code>. These are incompatible pointer types, hence the compiler diagnostic message. As it turns out, the array pointer and the int pointer to the first element will very likely have the same representation and the same address internally. This is why the first example "works" even though it is not correct C.

21,585,326

Implementing SearchView in action bar

I need to create <code>SearchView</code> from my <code>arrayList<String></code> and show the suggestions in the drop-down list same this <a href="https://i.stack.imgur.com/y9ofu.png" rel="noreferrer"><img src="https://i.stack.imgur.com/y9oful.jpg" alt="enter image description here"></a> I look for tutorials that explain step by step how to build a <code>SearchView</code> in a action bar. I have read <a href="http://developer.android.com/guide/topics/search/search-dialog.html" rel="noreferrer">the documentation</a> and following the example google but it was not useful to me. I have created the search <pre><code><?xml version="1.0" encoding="utf-8"?> <menu xmlns:android="http://schemas.android.com/apk/res/android"> <item android:id="@+id/action_search" android:title="Search" android:icon="@android:drawable/ic_menu_search" android:showAsAction="always" android:actionViewClass="android.widget.SearchView" /> </menu>` </code></pre> But I do not know how to set the parameters of the array of strings. I tried to retrieve the result in a different Activity but not work.

22,302,422

4

1

null

2014-02-05 18:21:37.94 UTC

68

2019-10-23 10:53:43.2 UTC

2016-05-26 17:35:30.79 UTC

null

1,718,174

null

2,672,575

null

1

83

android|android-actionbar|autocompletetextview|searchview

195,508

It took a while to put together a solution for this, but have found this is the easiest way to get it to work in the way that you describe. There could be better ways to do this, but since you haven't posted your activity code I will have to improvise and assume you have a list like this at the start of your activity: <pre><code>private List<String> items = db.getItems(); </code></pre> ExampleActivity.java <pre><code>private List<String> items; private Menu menu; @Override @TargetApi(Build.VERSION_CODES.HONEYCOMB) public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.example, menu); this.menu = menu; if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { SearchManager manager = (SearchManager) getSystemService(Context.SEARCH_SERVICE); SearchView search = (SearchView) menu.findItem(R.id.search).getActionView(); search.setSearchableInfo(manager.getSearchableInfo(getComponentName())); search.setOnQueryTextListener(new OnQueryTextListener() { @Override public boolean onQueryTextChange(String query) { loadHistory(query); return true; } }); } return true; } // History @TargetApi(Build.VERSION_CODES.HONEYCOMB) private void loadHistory(String query) { if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { // Cursor String[] columns = new String[] { "_id", "text" }; Object[] temp = new Object[] { 0, "default" }; MatrixCursor cursor = new MatrixCursor(columns); for(int i = 0; i < items.size(); i++) { temp[0] = i; temp[1] = items.get(i); cursor.addRow(temp); } // SearchView SearchManager manager = (SearchManager) getSystemService(Context.SEARCH_SERVICE); final SearchView search = (SearchView) menu.findItem(R.id.search).getActionView(); search.setSuggestionsAdapter(new ExampleAdapter(this, cursor, items)); } } </code></pre> Now you need to create an adapter extended from <code>CursorAdapter</code>: ExampleAdapter.java <pre><code>public class ExampleAdapter extends CursorAdapter { private List<String> items; private TextView text; public ExampleAdapter(Context context, Cursor cursor, List<String> items) { super(context, cursor, false); this.items = items; } @Override public void bindView(View view, Context context, Cursor cursor) { text.setText(items.get(cursor.getPosition())); } @Override public View newView(Context context, Cursor cursor, ViewGroup parent) { LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); View view = inflater.inflate(R.layout.item, parent, false); text = (TextView) view.findViewById(R.id.text); return view; } } </code></pre> A better way to do this is if your list data is from a database, you can pass the <code>Cursor</code> returned by database functions directly to <code>ExampleAdapter</code> and use the relevant column selector to display the column text in the <code>TextView</code> referenced in the adapter. Please note: when you import <code>CursorAdapter</code> don't import the Android support version, import the standard <code>android.widget.CursorAdapter</code> instead. The adapter will also require a custom layout: res/layout/item.xml <pre><code><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextView android:id="@+id/item" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </RelativeLayout> </code></pre> You can now customize list items by adding additional text or image views to the layout and populating them with data in the adapter. This should be all, but if you haven't done this already you need a SearchView menu item: res/menu/example.xml <pre><code><menu xmlns:android="http://schemas.android.com/apk/res/android"> <item android:id="@+id/search" android:title="@string/search" android:showAsAction="ifRoom" android:actionViewClass="android.widget.SearchView" /> </menu> </code></pre> Then create a searchable configuration: res/xml/searchable.xml <pre><code><searchable xmlns:android="http://schemas.android.com/apk/res/android" android:label="@string/search" android:hint="@string/search" > </searchable> </code></pre> Finally add this inside the relevant activity tag in the manifest file: AndroidManifest.xml <pre><code><intent-filter> <action android:name="android.intent.action.SEARCH" /> </intent-filter> <meta-data android:name="android.app.default_searchable" android:value="com.example.ExampleActivity" /> <meta-data android:name="android.app.searchable" android:resource="@xml/searchable" /> </code></pre> Please note: The <code>@string/search</code> string used in the examples should be defined in values/strings.xml, also don't forget to update the reference to <code>com.example</code> for your project.

21,851,985

Difference between np.int, np.int_, int, and np.int_t in cython?

I am a bit struggled with so many <code>int</code> data types in cython. <code>np.int, np.int_, np.int_t, int</code> I guess <code>int</code> in pure python is equivalent to <code>np.int_</code>, then where does <code>np.int</code> come from? I cannot find the document from numpy? Also, why does <code>np.int_</code> exist given we do already have <code>int</code>? In cython, I guess <code>int</code> becomes a C type when used as <code>cdef int</code> or <code>ndarray[int]</code>, and when used as <code>int()</code> it stays as the python caster? Is <code>np.int_</code> equivalent to <code>long</code> in C? so <code>cdef long</code> is the identical to <code>cdef np.int_</code>? Under what circumstances should I use <code>np.int_t</code> instead of <code>np.int</code>? e.g. <code>cdef np.int_t</code>, <code>ndarray[np.int_t]</code> ... Can someone briefly explain how the wrong use of those types would affect the performance of compiled cython code?

46,416,257

3

1

null

2014-02-18 11:11:50.903 UTC

29

2022-06-02 05:45:48.767 UTC

2014-02-18 13:17:37.747 UTC

null

691,867

null

691,867

null

1

55

python|c|numpy|cython

45,001

It's a bit complicated because the names have different meanings depending on the context. <h1><code>int</code></h1> <ol> <li>In Python The <code>int</code> is normally just a Python type, it's of arbitrary precision, meaning that you can store any conceivable integer inside it (as long as you have enough memory). <pre><code>>>> int(10**50) 100000000000000000000000000000000000000000000000000 </code></pre></li> <li>However, when you use it as <code>dtype</code> for a NumPy array it will be interpreted as <code>np.int_</code> 1. Which is not of arbitrary precision, it will have the same size as C's <code>long</code>: <pre><code>>>> np.array(10**50, dtype=int) OverflowError: Python int too large to convert to C long </code></pre> That also means the following two are equivalent: <pre><code>np.array([1,2,3], dtype=int) np.array([1,2,3], dtype=np.int_) </code></pre></li> <li>As Cython type identifier it has another meaning, here it stands for the <a href="/questions/tagged/c" class="post-tag" title="show questions tagged 'c'" rel="tag">c</a> type <code>int</code>. It's of limited precision (typically 32bits). You can use it as Cython type, for example when defining variables with <code>cdef</code>: <pre><code>cdef int value = 100 # variable cdef int[:] arr = ... # memoryview </code></pre> As return value or argument value for <code>cdef</code> or <code>cpdef</code> functions: <pre><code>cdef int my_function(int argument1, int argument2): # ... </code></pre> As "generic" for <code>ndarray</code>: <pre><code>cimport numpy as cnp cdef cnp.ndarray[int, ndim=1] val = ... </code></pre> For type casting: <pre><code>avalue = <int>(another_value) </code></pre> And probably many more.</li> <li>In Cython but as Python type. You can still call <code>int</code> and you'll get a "Python int" (of arbitrary precision), or use it for <code>isinstance</code> or as <code>dtype</code> argument for <code>np.array</code>. Here the context is important, so converting to a Python <code>int</code> is different from converting to a C int: <pre><code>cdef object val = int(10) # Python int cdef int val = <int>(10) # C int </code></pre></li> </ol> <h1><code>np.int</code></h1> Actually this is very easy. It's just an alias for <code>int</code>: <pre><code>>>> int is np.int True </code></pre> So everything from above applies to <code>np.int</code> as well. However you can't use it as a type-identifier except when you use it on the <code>cimport</code>ed package. In that case it represents the Python integer type. <pre><code>cimport numpy as cnp cpdef func(cnp.int obj): return obj </code></pre> This will expect <code>obj</code> to be a Python integer not a NumPy type: <pre><code>>>> func(np.int_(10)) TypeError: Argument 'obj' has incorrect type (expected int, got numpy.int32) >>> func(10) 10 </code></pre> My advise regarding <code>np.int</code>: Avoid it whenever possible. In Python code it's equivalent to <code>int</code> and in Cython code it's also equivalent to Pythons <code>int</code> but if used as type-identifier it will probably confuse you and everyone who reads the code! It certainly confused me... <h1><code>np.int_</code></h1> Actually it only has one meaning: It's a Python type that represents a scalar NumPy type. You use it like Pythons <code>int</code>: <pre><code>>>> np.int_(10) # looks like a normal Python integer 10 >>> type(np.int_(10)) # but isn't (output may vary depending on your system!) numpy.int32 </code></pre> Or you use it to specify the <code>dtype</code>, for example with <code>np.array</code>: <pre><code>>>> np.array([1,2,3], dtype=np.int_) array([1, 2, 3]) </code></pre> But you cannot use it as type-identifier in Cython. <h1><code>cnp.int_t</code></h1> It's the type-identifier version for <code>np.int_</code>. That means you can't use it as dtype argument. But you can use it as type for <code>cdef</code> declarations: <pre><code>cimport numpy as cnp import numpy as np cdef cnp.int_t[:] arr = np.array([1,2,3], dtype=np.int_) |---TYPE---| |---DTYPE---| </code></pre> This example (hopefully) shows that the type-identifier with the trailing <code>_t</code> actually represents the type of an array using the dtype without the trailing <code>t</code>. You can't interchange them in Cython code! <h1>Notes</h1> There are several more numeric types in NumPy I'll include a list containing the NumPy dtype and Cython type-identifier and the C type identifier that could also be used in Cython here. But it's basically taken from <a href="https://docs.scipy.org/doc/numpy/user/basics.types.html#array-types-and-conversions-between-types" rel="noreferrer">the NumPy documentation</a> and the <a href="https://github.com/cython/cython/blob/master/Cython/Includes/numpy/__init__.pxd" rel="noreferrer">Cython NumPy <code>pxd</code> file</a>: <pre><code>NumPy dtype Numpy Cython type C Cython type identifier np.bool_ None None np.int_ cnp.int_t long np.intc None int np.intp cnp.intp_t ssize_t np.int8 cnp.int8_t signed char np.int16 cnp.int16_t signed short np.int32 cnp.int32_t signed int np.int64 cnp.int64_t signed long long np.uint8 cnp.uint8_t unsigned char np.uint16 cnp.uint16_t unsigned short np.uint32 cnp.uint32_t unsigned int np.uint64 cnp.uint64_t unsigned long np.float_ cnp.float64_t double np.float32 cnp.float32_t float np.float64 cnp.float64_t double np.complex_ cnp.complex128_t double complex np.complex64 cnp.complex64_t float complex np.complex128 cnp.complex128_t double complex </code></pre> Actually there are Cython types for <code>np.bool_</code>: <code>cnp.npy_bool</code> and <code>bint</code> but both they can't be used for NumPy arrays currently. For scalars <code>cnp.npy_bool</code> will just be an unsigned integer while <code>bint</code> will be a boolean. Not sure what's going on there... <hr> 1 Taken From the <a href="https://docs.scipy.org/doc/numpy-1.13.0/reference/arrays.dtypes.html#specifying-and-constructing-data-types" rel="noreferrer">NumPy documentation "Data type objects"</a> <blockquote> <h2>Built-in Python types</h2> Several python types are equivalent to a corresponding array scalar when used to generate a dtype object: <pre><code>int np.int_ bool np.bool_ float np.float_ complex np.cfloat bytes np.bytes_ str np.bytes_ (Python2) or np.unicode_ (Python3) unicode np.unicode_ buffer np.void (all others) np.object_ </code></pre> </blockquote>

9,041,976

Recovering mysql database from data folder backup

I have uninstalled the old XAMPP and deleted all of the content of <code>d:\xampp folder</code> and installed the new one. When I copy my backup folder (with the name of my database, containing all <code>.frm</code> and <code>.opt</code> files) to the <code>D:\xampp\mysql\data</code>, the database shows in the list in phpmyadmin but it has no tables and data. What I've done wrong?

9,047,289

13

0

null

2012-01-28 00:46:21.5 UTC

12

2022-06-25 19:14:17.263 UTC

2017-02-23 13:36:31.26 UTC

null

5,866,279

null

603,200

null

1

21

mysql|phpmyadmin

79,119

I've searched a lot. There's a few other files that are needed for recovery. I think it's impossible to recover tables from the .frm files alone. I've re-created my database.

9,149,919

No mapping exists from object type System.Collections.Generic.List when executing stored proc with parameters in EF 4.3

Lately I've been working on stored procedure and encountered 1 strange problem. First, I was able to successfully call a stored procedure from the database via: <blockquote> IList<XXXViewModel> XXXList = _context.Database.SqlQuery("spXXX").ToList(); </blockquote> But when I needed to pass parameters it failed: <pre><code>var parameters = new List<SqlParameter>(); parameters.Add(new SqlParameter("param1", param1Value)); parameters.Add(new SqlParameter("param2", param2Value)); IList<XXXViewModel> XXXList = _context.Database.SqlQuery<XXXViewModel>("spXXX @param1, @param2", parameters).ToList(); </code></pre> And I got the ff, error: <blockquote> No mapping exists from object type System.Collections.Generic.List`1[[System.Data.SqlClient.SqlParameter, System.Data, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]] to a known managed provider native type. </blockquote> Note that I've also tried: <pre><code>_context.Database.ExecuteSqlCommand<EXEC XXXViewModel>("spXXX @param1, @param2", parameters).ToList(); </code></pre> But got the same result :-(. Also I've tried calling, by specifying each of the parameters: <pre><code>IList<XXXResult> query = Context.Database.SqlQuery<XXXResult>("SP @paramA, @paramB, @paramC", new SqlParameter("paramA", "A"), new SqlParameter("paramB", "B"), new SqlParameter("paramC", "C")).ToList(); </code></pre> Anyone has any idea?

9,149,978

9

0

null

2012-02-05 14:14:36.347 UTC

4

2022-03-16 05:55:17.53 UTC

2012-02-05 15:24:50.663 UTC

null

689,416

null

689,416

null

1

43

entity-framework|entity-framework-4.1|ef-code-first

48,671

You need to pass each parameter to the method (ie You can't pass a list) <pre><code>IList<XXXViewModel> XXXList = _context.Database.SqlQuery<XXXViewModel>("spXXX @param1, @param2", new SqlParameter("param1", param1Value), new SqlParameter("param2", param2Value)).ToList(); </code></pre>

10,336,899

What is a Question Mark "?" and Colon ":" Operator Used for?

Two questions about using a question mark "?" and colon ":" operator within the parentheses of a print function: What do they do? Also, does anyone know the standard term for them or where I can find more information on their use? I've read that they are similar to an 'if' 'else' statement. <pre><code>int row = 10; int column; while (row >= 1) { column = 1; while(column <= 10) { System.out.print(row % 2 == 1 ? "<" : "\r>"); ++column; } --row; System.out.println(); } </code></pre>

10,336,927

7

1

null

2012-04-26 15:48:05.573 UTC

65

2017-04-18 20:44:46.653 UTC

2015-07-23 10:13:01.063 UTC

null

1,816,580

null

1,214,163

null

1

145

java|operators|ternary-operator|conditional-operator

395,788

This is the <a href="https://en.wikipedia.org/wiki/%3F:" rel="noreferrer">ternary conditional operator</a>, which can be used anywhere, not just the print statement. It's sometimes just called "the ternary operator", but <a href="https://stackoverflow.com/questions/2997028/other-ternary-operators-besides-ternary-conditional">it's not the only ternary operator</a>, just the most common one. Here's a good example from Wikipedia demonstrating how it works: <blockquote> A traditional if-else construct in C, Java and JavaScript is written: <pre><code>if (a > b) { result = x; } else { result = y; } </code></pre> This can be rewritten as the following statement: <pre><code>result = a > b ? x : y; </code></pre> </blockquote> Basically it takes the form: <pre><code>boolean statement ? true result : false result; </code></pre> So if the boolean statement is true, you get the first part, and if it's false you get the second one. Try these if that still doesn't make sense: <pre><code>System.out.println(true ? "true!" : "false."); System.out.println(false ? "true!" : "false."); </code></pre>

23,094,584

Multiple Controller Types with same Route prefix ASP.NET Web Api

Is it possible to separate GETs and POSTs into separate API Controller types and accessing them using the same Route Prefix? Here are my controllers: <pre><code>[RoutePrefix("api/Books")] public class BooksWriteController : EventStoreApiController { [Route("")] public void Post([FromBody] CommandWrapper commandWrapper){...} } [RoutePrefix("api/Books")] public class BooksReadController : MongoDbApiController { [Route("")] public Book[] Get() {...} [Route("{id:int}")] public Book Get(int id) {...} } </code></pre>

23,097,445

3

1

null

2014-04-15 21:09:29.423 UTC

10

2020-12-03 18:41:24.377 UTC

null

185,123

null

1,145,404

null

1

25

c#|asp.net-web-api|asp.net-web-api-routing|attributerouting

25,258

Web API (1.x-2.x) does not support multiple attribute routes with the same path on different controllers. The result is a 404, because all the route matches more than one controller and at that point Web API will consider the result ambiguous. Note that <a href="https://www.nuget.org/packages/Microsoft.AspNetCore.Mvc/" rel="noreferrer">MVC Core</a> does support this scenario note: MVC Core serves as both MVC & Web API. If you choose to use Web API 2.11 (or newer) you can create a route constraint for the http method per controller and use it instead of the built in Route Attribute. The sample below shows that you can use RoutePrefix or directly Routes (like kmacdonald's answer). <pre><code>using System.Collections.Generic; using System.Net.Http; using System.Web.Http; using System.Web.Http.Routing; public class BooksWriteController : ApiController { [PostRoute("api/Books")] public void Post() { } } [RoutePrefix("api/books")] public class BooksReadController : ApiController { [GetRoute] public void Get() { } [GetRoute("{id:int}")] public void Get(int id) { } } </code></pre> These two classes simplify the use of the constraint route attribute <pre><code>class GetRouteAttribute : MethodConstraintedRouteAttribute { public GetRouteAttribute(string template) : base(template ?? "", HttpMethod.Get) { } } class PostRouteAttribute : MethodConstraintedRouteAttribute { public PostRouteAttribute(string template) : base(template ?? "", HttpMethod.Post) { } } </code></pre> This class allows adding constraints to the route generated <pre><code>class MethodConstraintedRouteAttribute : RouteFactoryAttribute { public MethodConstraintedRouteAttribute(string template, HttpMethod method) : base(template) { Method = method; } public HttpMethod Method { get; private set; } public override IDictionary<string, object> Constraints { get { var constraints = new HttpRouteValueDictionary(); constraints.Add("method", new MethodConstraint(Method)); return constraints; } } } </code></pre> This is just a standard route constraint, nit: you may want to cache the constraints object to reduce allocations. <pre><code>class MethodConstraint : IHttpRouteConstraint { public HttpMethod Method { get; private set; } public MethodConstraint(HttpMethod method) { Method = method; } public bool Match(HttpRequestMessage request, IHttpRoute route, string parameterName, IDictionary<string, object> values, HttpRouteDirection routeDirection) { return request.Method == Method; } } </code></pre>

23,365,307

java: TreeSet order

With this code I get this output: <pre><code> TreeSet<String> t=new TreeSet<String>(); t.add("test 15"); t.add("dfd 2"); t.add("ersfd 20"); t.add("asdt 10"); Iterator<String> it=t.iterator(); while(it.hasNext()){ System.out.println(it.next); } </code></pre> I get: <pre><code> asdt 10 dfd 2 ersfd 20 test 15 </code></pre> How can I get an order of this kind, based on the numbers, with TreeSet? <pre><code> dfd 2 asdt 10 test 15 ersfd 20 </code></pre>

23,365,540

7

2

null

2014-04-29 12:56:23.203 UTC

2

2019-11-14 02:03:37.847 UTC

null

3,529,121

null

1

10

java|treeset

45,595

The TreeSet implementation is sorting by the lexicographic order of the string values you insert. If you want to sort by the integer value, then you'll need to do as these others suggested and create a new object and override the compareTo method, or use your own comparator. <pre><code>Set<String> set = new TreeSet<String>(new Comparator<String>() { public int compare(String one, String other) { // implement } }); </code></pre> or <pre><code>public class MyClass implements Comparable { private String key; private int value; public int compareTo(MyClass other) { // implement } public boolean equals(MyClass other) { // implement } // snip ... } Set<MyClass> set = new TreeSet<MyClass>(); </code></pre>

31,728,837

RecyclerView Grow Element From Right to Left

i use RecyclerView in horizontal direction and New element is left to right. and scrolling is ltr. how to change this direction? <a href="https://i.stack.imgur.com/tPztM.png" rel="noreferrer"><img src="https://i.stack.imgur.com/tPztM.png" alt="enter image description here"></a> Xml Code: <pre><code> <android.support.v7.widget.RecyclerView android:id="@+id/rc3" android:layout_gravity="right" android:layout_width="fill_parent" android:layout_height="wrap_content" /> </code></pre> And Java: <pre><code> RecyclerView rc1 = (RecyclerView) findViewById(R.id.rc1); AdapterMainPrice mainPrice = new AdapterMainPrice(StructPrice.getThreePrice()); rc1.setHasFixedSize(false); LinearLayoutManager llm = new LinearLayoutManager(G.context); llm.setOrientation(LinearLayoutManager.HORIZONTAL); rc1.setLayoutManager(llm); rc1.setAdapter(mainPrice); </code></pre> Adapter: public class AdapterMainPrice extends RecyclerView.Adapter { <pre><code>private List<StructPrice> prices; public AdapterMainPrice(List<StructPrice> catList) { this.prices = catList; } @Override public int getItemCount() { return prices.size(); } @Override public void onBindViewHolder(NewsViewHolder ghazaViewHolder, int position) { StructPrice price = prices.get(position); ghazaViewHolder.vTitle.setText(price.getProductName()); Glide.with(G.context) .load(price.getProductPic()) .placeholder(R.drawable.loading_spinner) .crossFade() .into(ghazaViewHolder.Vimg); ghazaViewHolder.cardView.startAnimation(ghazaViewHolder.animation); } @Override public NewsViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) { View itemView = LayoutInflater. from(viewGroup.getContext()). inflate(R.layout.adapter_item_main, viewGroup, false); return new NewsViewHolder(itemView); } public static class NewsViewHolder extends RecyclerView.ViewHolder { protected TextView vTitle; protected ImageView Vimg; protected Animation animation; protected CardView cardView; public NewsViewHolder(View v) { super(v); vTitle = (TextView) v.findViewById(R.id.mainRCtv); Vimg = (ImageView) v.findViewById(R.id.mainRCimg); animation = AnimationUtils.loadAnimation(G.context, R.anim.fadein); cardView = (CardView) v.findViewById(R.id.mainRCCard); } } </code></pre>

33,389,274

9

1

null

2015-07-30 16:06:42.44 UTC

5

2021-08-17 08:15:24.5 UTC

null

2,383,176

null

1

30

android|android-recyclerview|right-to-left

28,732

it is pretty simple, just call setReverseLayout(true) for your LayoutManager : <pre><code>LinearLayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, true); layoutManager.setReverseLayout(true); </code></pre> it is explained in its documentation : <pre><code> /** * Used to reverse item traversal and layout order. * This behaves similar to the layout change for RTL views. When set to true, first item is * laid out at the end of the UI, second item is laid out before it etc. * * For horizontal layouts, it depends on the layout direction. * When set to true, If {@link android.support.v7.widget.RecyclerView} is LTR, than it will * layout from RTL, if {@link android.support.v7.widget.RecyclerView}} is RTL, it will layout * from LTR. * * If you are looking for the exact same behavior of * {@link android.widget.AbsListView#setStackFromBottom(boolean)}, use * {@link #setStackFromEnd(boolean)} */ public void setReverseLayout(boolean reverseLayout) { assertNotInLayoutOrScroll(null); if (reverseLayout == mReverseLayout) { return; } mReverseLayout = reverseLayout; requestLayout(); } </code></pre>

13,582,000

select all the employee in all departments which are having highest salary in that department

In one of the interviews one person asked me below question "Write a query to find out all employee in all departments which are having highest salary in that department with department name,employee name and his salary" It means that there are 100 records in employee table and 10 records in department table. So it needs to give me 10 records from query plus if there is no employee in any department it still needs to show that department name. Thanks

13,582,474

6

1

null

2012-11-27 10:18:44.443 UTC

2

2017-03-03 01:10:31.95 UTC

null

1,817,490

null

1

mysql

63,991

This query gives you a list of departments, with that department's highest paid salary, if exists, or null otherwise. In this case, selecting the employee names do not give you the right name and just return the first employee in the linked department! <pre><code>SELECT d.name, MAX(e.salary) FROM department d LEFT OUTER JOIN employee e ON (e.department_id = d.id) GROUP BY d.id </code></pre> See on <a href="http://sqlfiddle.com/#!9/c18e7/51" rel="nofollow noreferrer">SQL Fiddle</a> If you wish a list of departments with the highest salary and employee name: <pre><code>SELECT d.name, e.name, e.salary FROM department d LEFT OUTER JOIN employee e ON (e.department_id = d.id) WHERE e.salary IN ( SELECT MAX(em.salary) FROM employee em WHERE em.department_id = d.id ); </code></pre> See on <a href="http://sqlfiddle.com/#!9/c18e7/15" rel="nofollow noreferrer">SQL Fiddle</a>

13,607,854

ORACLE 11G UTL_FILE + UTL_FILE_DIR - Invalid Directory

Hi I am running Oracle 11 and I am trying to write to a directory on the server box using UTL_FILE.FOPEN. To test this I am using the following script (output included): <pre><code>SQL> @D:\test.sql declare l_file_handle UTL_FILE.FILE_TYPE; begin l_file_handle := UTL_FILE.FOPEN('/appl/mydir', '/appl/mydir/filename', 'W'); UTL_FILE.FCLOSE(l_file_handle); DBMS_OUTPUT.PUT_LINE('FINISHED'); end; ORA-29280: invalid directory path ORA-06512: at "SYS.UTL_FILE", line 41 ORA-06512: at "SYS.UTL_FILE", line 478 ORA-06512: at line 7 SQL> </code></pre> I have the /appl/mydir added to the UTL_FILE parameter: <pre><code>SELECT value FROM V$PARAMETER WHERE NAME = 'utl_file_dir'; /appl/mydir, /appl/mydir2, /appl/mydir3 </code></pre> The UNIX directory is writable by all on UNIX: <pre><code>$ ls -l /appl/mydir total 0 drwxrwsrwx 2 user userc 363968 Nov 27 13:46 mydir </code></pre> Using oracle Directory object is not an option and I am aware of the disadvantages of using the UTL_FILE_DIR implementation. Any ideas why the above script is failing?

13,609,023

4

5

null

2012-11-28 14:50:14.503 UTC

2

2016-08-12 13:24:17.233 UTC

null

1,048,478

null

1

2

oracle|oracle11g|utl-file

83,319

first, in 11g the preferred way is to create a directory and not use utl_file. secondly, please verify what exact command you used to set the directoty list : <pre><code>SELECT value FROM V$PARAMETER WHERE NAME = 'utl_file_dir'; /appl/mydir, /appl/mydir2, /appl/mydir3 </code></pre> was it <pre><code>alter system set utl_file_dir='/appl/mydir, /appl/mydir2, /appl/mydir3' scope = spfile; </code></pre> or <pre><code>alter system set utl_file_dir='/appl/mydir','/appl/mydir2','/appl/mydir3' scope = spfile; </code></pre> if its the first way, redo it again the 2nd way as the first way is wrong (it will look the same in the v$table output, but its wrong). eg: <pre><code>declare 2 l_file_handle UTL_FILE.FILE_TYPE; 4 begin l_file_handle := UTL_FILE.FOPEN('/tmp/foo/a', '/tmp/foo/a/filename.txt', 'w'); 9 UTL_FILE.FCLOSE(l_file_handle); 11 DBMS_OUTPUT.PUT_LINE('FINISHED'); 13 end; 15 / declare * ERROR at line 1: ORA-29280: invalid directory path ORA-06512: at "SYS.UTL_FILE", line 41 ORA-06512: at "SYS.UTL_FILE", line 478 ORA-06512: at line 6 SQL> show parameter utl_fil NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ utl_file_dir string /tmp/foo, /tmp/foo/a </code></pre> humm. now lets fix that data. <pre><code>SQL> alter system set utl_file_dir='/tmp/foo','/tmp/foo/a' scope = spfile; System altered. SQL> shutdown immediate Database closed. Database dismounted. ORACLE instance shut down. SQL> startup open ORACLE instance started. Total System Global Area 263049216 bytes Fixed Size 2225584 bytes Variable Size 176163408 bytes Database Buffers 79691776 bytes Redo Buffers 4968448 bytes Database mounted. Database opened. declare 2 l_file_handle UTL_FILE.FILE_TYPE; 4 begin l_file_handle := UTL_FILE.FOPEN('/tmp/foo/a', '/tmp/foo/a/filename.txt', 'w'); 9 UTL_FILE.FCLOSE(l_file_handle); 11 DBMS_OUTPUT.PUT_LINE('FINISHED'); 13 end; 15 / PL/SQL procedure successfully completed. SQL> show parameter utl_file NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ utl_file_dir string /tmp/foo, /tmp/foo/a SQL> </code></pre> also verify the oracle user has r+x on /appl and rwx on /appl/mydir

19,278,776

Find specific row data in all database tables? Without Creating A Procedure Or Table

This is what I have so far to find all tables with more than 100 rows: <pre><code>SELECT sc.name +'.'+ ta.name TableName ,SUM(pa.rows) RowCnt FROM sys.tables ta INNER JOIN sys.partitions pa ON pa.OBJECT_ID = ta.OBJECT_ID INNER JOIN sys.schemas sc ON ta.schema_id = sc.schema_id WHERE ta.is_ms_shipped = 0 AND pa.index_id IN (1,0) AND pa.rows >100 GROUP BY sc.name,ta.name,pa.rows ORDER BY TABLENAME </code></pre> Is there something similar where I can go through the database to find out a specific row data for a column within a table? For example: Where c.name = GUITARS and GUTARS = 'Fender' Edit: I do not have CREATE PROCEDURE permission OR CREATE TABLE Just looking for any specific data under a certain column name, doesn't matter if it returns a lot of rows.

19,279,989

3

1

null

2013-10-09 17:27:43.97 UTC

1

2017-03-30 05:57:29.723 UTC

2013-10-09 19:28:06.987 UTC

null

2,657,602

null

2,657,602

null

1

6

sql|sql-server|database|tsql

40,708

Please see my answer to <a href="https://stackoverflow.com/a/12306613/880904">How do I find a value anywhere in a SQL Server Database?</a> where I provide a script to search all tables in a database. A pseudo-code description of this would be be <code>select * from * where any like 'foo'</code> It also allows you to search specific column names using standard <code>like</code> syntax, e.g. <code>%guitar%</code> to search column names that have the word "guitar" in them. It runs ad-hoc, so you do not have to create a stored procedure, but you do need access to information_schema. I use this script in SQL 2000 and up almost daily in my DB development work.

17,712,359

authenticate_or_request_with_http_token returning html instead of json

I've created a rails-api application and proceeded to secure it using token authentication. I've set a <code>before_filter</code> that is calling a method which uses <code>authenticate_or_request_with_http_token</code>. Everything is working fine but, when the authentication is incorrect i'm getting an html response. How can I define what format the response should be? <pre><code>before_filter :restrict_access private def restrict_access authenticate_or_request_with_http_token do |token, options| check_token token end end def check_token(token) Session.exists?(access_token: token) end </code></pre>

18,510,100

2

null

2013-07-18 00:04:14.857 UTC

8

2020-06-04 21:22:32.42 UTC

2016-02-13 09:23:47.343 UTC

null

276,959

null

469,679

null

1

17

ruby-on-rails|json|rails-api

4,016

By including <code>ActionController::HttpAuthentication::Token::ControllerMethods</code> you include several methods, amongst others <code>request_http_token_authentication</code> which is simply a wrapper around <code>Token.authentication_request</code>. That <code>#authentication_request</code>-method is the culprit and sends the plain text (not HTML as your question suggests) as follows: <pre><code>def authentication_request(controller, realm) controller.headers["WWW-Authenticate"] = %(Token realm="#{realm.gsub(/"/, "")}") controller.__send__ :render, :text => "HTTP Token: Access denied.\n", :status => :unauthorized end </code></pre> The trick is to override <code>request_http_token_authentication</code> in your <code>ApplicationController</code> to not call <code>Token.authentication_request</code> but to set the correct status and headers and then render JSON instead. Add this to your <code>ApplicationController</code>: <pre><code>protected def request_http_token_authentication(realm = "Application") self.headers["WWW-Authenticate"] = %(Token realm="#{realm.gsub(/"/, "")}") render :json => {:error => "HTTP Token: Access denied."}, :status => :unauthorized end </code></pre>

3,566,462

Google App Engine : Cursor Versus Offset

Do you know which is the best approach for fetching chunks of result from a query? <h1>1.Cursor</h1> <pre><code>q = Person.all() last_cursor = memcache.get('person_cursor') if last_cursor: q.with_cursor(last_cursor) people = q.fetch(100) cursor = q.cursor() memcache.set('person_cursor', cursor) </code></pre> <h1>2.Offset</h1> <pre><code>q = Person.all() offset = memcache.get('offset') if not offset: offset = 0 people = q.fetch(100, offset = offset) memcache.set('offset', offset + 100) </code></pre> Reading the <a href="http://code.google.com/appengine/docs/python/datastore/queriesandindexes.html#Query_Cursors" rel="noreferrer">Google documentation</a>, it seems that Cursor does not add the overhead of a query offset.

3,566,878

1

null

2010-08-25 13:46:22.883 UTC

9

2010-08-25 14:26:38.983 UTC

2010-08-25 13:53:08.67 UTC

null

130,929

null

130,929

null

1

20

python|google-app-engine

3,806

While it's hard to measure precise and reliably, I'd be astonished if the cursor didn't run rings around the offset approach at soon as a sufficiently large set of Person entities are getting returned. As <a href="http://code.google.com/appengine/docs/python/datastore/queryclass.html#Query_fetch" rel="noreferrer">the docs</a> say very clearly and explicitly, <blockquote> The datastore fetches offset + limit results to the application. The first offset results are not skipped by the datastore itself. The fetch() method skips the first offset results, then returns the rest (limit results). The query has performance characteristics that correspond linearly with the offset amount plus the limit. </blockquote> I'm not sure how it could be any more explicit: O(offset + limit) is the big-O performance of fetching with an offset. If overall (say over multiple scheduled tasks) you're fetching a million items, 1000 at a time, when you fetch the last 1000 (with offset 999000) the datastore does not skip the first 999000 (even though fetch does not return them), so the performance impact will be staggering. No such caveat applies to using cursors: fetching resumes exactly where it left off, without having to repeatedly fetch all the (possibly many) items already fetched along that cursor in previous queries. Therefore, with performance O(limit), elapsed time should be arbitrarily better than that you can obtain with an offset, as long as that offset gets sufficiently large.

40,801,789

Using return value inside another function

I have these two functions: <pre><code>def check_channel_number(self): print "***************Channel Checker *********************" print '' user_channel_number = int(re.sub('\D', '', raw_input("Enter a channel number, (3digit): "))[:3]); channel = ("channelNr= '%d'") % (user_channel_number) print channel # channel_search = channel + str(user_channel_number) datafile = file('output.txt') found = False for line in datafile: if channel in line: found = True print 'The channel number you entered is correct and will be deleted' return user_channel_number print 'The channel number you entered is not on the planner' return False </code></pre> and <pre><code>def delete_events(self): if user_channel_number == True: return 'The program number is correct and will be deleted' # action = 'DeleteEvent' menu_action = 'all' book = 'RECYC:687869882' arg_list = [('C:\\Users\\yke01\\Documents\\StormTest\\Scripts\\Completed' '\\Utils\\UPNP_Client_Cmd_Line.py')] arg_list.append(' --action=') arg_list.append(action) arg_list.append(' --ip=') arg_list.append('10.10.8.89') arg_list.append(' --objectId=') arg_list.append(book) subprocess.call(["python", arg_list]) print 'The program deleted successfully' </code></pre> When I run my script, it says that <code>user_channel_number</code> is not defined globally. How can I use <code>user_channel_number</code> inside the <code>delete_events</code> function?

40,801,904

3

1

null

2016-11-25 09:39:47.107 UTC

3

2022-06-05 17:07:43.6 UTC

null

523,612

null

4,069,939

null

1

5

python|python-2.7

61,622

Functions can not share their local variables. You can return the value from the first and pass it to the second: <pre><code>def check_channel_number(self): ... return user_channel_number def delete_events(self): user_channel_number = self.check_channel_number() ... </code></pre> Or save value on the object: <pre><code>def check_channel_number(self): ... self.user_channel_number = user_channel_number ... def delete_events(self): if self.user_channel_number: .... </code></pre>

2,034,281

PHP form token usage and handling

I'm a beginner working on a login script in PHP. This is the form token statement that I have so far: <pre><code>$_SESSION["form_token"] = md5(rand(time (), true)) ; </code></pre> The statement is issued just after the user indicates that he/she wants to login. My limited understanding is that the tokens purpose is to identify a unique user at a unique point in time and to disguise the form token information. Then everything becomes fuzzy. Here are my 3 open questions: <ol> <li>When is the best time to "check" the form token for security purposes? </li> <li>How do I check it? </li> <li>When, if ever, do I "destroy" the form token? (IOW, would the form token stay "active" until the user logs out?</li> </ol>

2,034,310

3

2

null

2010-01-09 17:50:27.613 UTC

21

2017-09-28 19:09:34.99 UTC

2012-08-15 16:27:12.217 UTC

null

221,381

null

185,727

null

1

17

php|forms|authentication|token

45,420

There is no need to do what you are attempting. When you start a session in PHP with session_start() a unique SESSIONID is already generated for you. You should not be putting this on the form. It is handled via cookies by default. There is also no need to check the SESSIONID either, that again is handled for you. You are responsible for authenticating the user and storing their authenticated identity (e.g. $_SESSION['user_id'] = $userId in the SESSION. If a user logs out you destroy their session with session_destroy. You should ensure session_start() is one of the first things for all pages in your site. Here is a basic example: <pre><code><?php session_start(); // starts new or resumes existing session session_regenerate_id(true); // regenerates SESSIONID to prevent hijacking function login($username, $password) { $user = new User(); if ($user->login($username, $password)) { $_SESSION['user_id'] = $user->getId(); return true; } return false; } function logout() { session_destroy(); } function isLoggedIn() { return isset($_SESSION['user_id']); } function generateFormHash($salt) { $hash = md5(mt_rand(1,1000000) . $salt); $_SESSION['csrf_hash'] = $hash return $hash; } function isValidFormHash($hash) { return $_SESSION['csrf_hash'] === $hash; } </code></pre> Edit: I misunderstood the original question. I added the relevant methods above for generating and validating form hashes; Please see the following resources: <ul> <li><a href="http://us3.php.net/manual/en/book.session.php" rel="noreferrer">PHP Session Handling</a></li> <li><a href="http://us3.php.net/manual/en/function.session-start.php" rel="noreferrer">session_start()</a></li> <li><a href="http://us3.php.net/manual/en/function.session-destroy.php" rel="noreferrer">session_destroy()</a></li> </ul>

2,287,695

Is parallel programming == multithread programming?

Is parallel programming == multithread programming?

2,288,309

3

1

null

2010-02-18 10:03:25.367 UTC

10

2010-02-19 10:53:24.777 UTC

null

35,501

null

275,930

null

1

45

multithreading|terminology|parallel-processing|concurrent-programming

11,732

Multithreaded programming is parallel, but parallel programming is not necessarily multithreaded. Unless the multithreading occurs on a single core, in which case it is only concurrent.

8,717,198

foreman only shows line with “started with pid #” and nothing else

When I run foreman I get the following: <pre><code> > foreman start 16:47:56 web.1 | started with pid 27122 </code></pre> Only if I stop it (via ctrl-c) it shows me what is missing: <pre><code>^CSIGINT received 16:49:26 system | sending SIGTERM to all processes 16:49:26 web.1 | => Booting Thin 16:49:26 web.1 | => Rails 3.0.0 application starting in development on http://0.0.0.0:5000 16:49:26 web.1 | => Call with -d to detach 16:49:26 web.1 | => Ctrl-C to shutdown server 16:49:26 web.1 | >> Thin web server (v1.3.1 codename Triple Espresso) 16:49:26 web.1 | >> Maximum connections set to 1024 16:49:26 web.1 | >> Listening on 0.0.0.0:5000, CTRL+C to stop 16:49:26 web.1 | >> Stopping ... 16:49:26 web.1 | Exiting 16:49:26 web.1 | >> Stopping ... </code></pre> How do I fix it?

8,873,793

6

1

null

2012-01-03 18:56:14.297 UTC

16

2019-01-21 08:19:09.14 UTC

null

2,142,505

null

990,268

null

1

54

ruby-on-rails|ruby|heroku|rubygems|foreman

13,369

I’ve been able to resolve this issue by 2 different ways: <ol> <li>From <a href="https://github.com/ddollar/foreman/wiki/Missing-Output" rel="noreferrer">https://github.com/ddollar/foreman/wiki/Missing-Output</a>: <blockquote> If you are not seeing any output from your program, there is a likely chance that it is buffering stdout. Ruby buffers stdout by default. To disable this behavior, add this code as early as possible in your program: </blockquote> <pre><code># ruby $stdout.sync = true </code></pre></li> <li>By installing foreman via the <a href="http://toolbelt.heroku.com/" rel="noreferrer">heroku toolbelt package</a></li> </ol> But I still don’t know what’s happening nor why this 2 ways above resolved the issue…

19,423,326

Partition a Set into smaller Subsets and process as batch

I have a continuous running thread in my application, which consists of a HashSet to store all the symbols inside the application. As per the design at the time it was written, inside the thread's while true condition it will iterate the HashSet continuously, and update the database for all the symbols contained inside HashSet. The maximum number of symbols that might be present inside the HashSet will be around 6000. I don't want to update the DB with all the 6000 symbols at once, but divide this HashSet into different subsets of 500 each (12 sets) and execute each subset individually and have a thread sleep after each subset for 15 minutes, so that I can reduce the pressure on the database. This is my code (sample code snippet) How can I partition a set into smaller subsets and process (I have seen the examples for partitioning ArrayList, TreeSet, but didn't find any example related to HashSet) <pre><code>package com.ubsc.rewji.threads; import java.util.Arrays; import java.util.Collections; import java.util.HashSet; import java.util.Iterator; import java.util.Set; import java.util.concurrent.PriorityBlockingQueue; public class TaskerThread extends Thread { private PriorityBlockingQueue<String> priorityBlocking = new PriorityBlockingQueue<String>(); String symbols[] = new String[] { "One", "Two", "Three", "Four" }; Set<String> allSymbolsSet = Collections .synchronizedSet(new HashSet<String>(Arrays.asList(symbols))); public void addsymbols(String commaDelimSymbolsList) { if (commaDelimSymbolsList != null) { String[] symAr = commaDelimSymbolsList.split(","); for (int i = 0; i < symAr.length; i++) { priorityBlocking.add(symAr[i]); } } } public void run() { while (true) { try { while (priorityBlocking.peek() != null) { String symbol = priorityBlocking.poll(); allSymbolsSet.add(symbol); } Iterator<String> ite = allSymbolsSet.iterator(); System.out.println("======================="); while (ite.hasNext()) { String symbol = ite.next(); if (symbol != null && symbol.trim().length() > 0) { try { updateDB(symbol); } catch (Exception e) { e.printStackTrace(); } } } Thread.sleep(2000); } catch (Exception e) { e.printStackTrace(); } } } public void updateDB(String symbol) { System.out.println("THE SYMBOL BEING UPDATED IS" + " " + symbol); } public static void main(String args[]) { TaskerThread taskThread = new TaskerThread(); taskThread.start(); String commaDelimSymbolsList = "ONVO,HJI,HYU,SD,F,SDF,ASA,TRET,TRE,JHG,RWE,XCX,WQE,KLJK,XCZ"; taskThread.addsymbols(commaDelimSymbolsList); } } </code></pre>

19,423,561

6

1

null

2013-10-17 09:48:03.123 UTC

1

2022-06-16 10:17:26.74 UTC

2020-12-19 10:51:42.8 UTC

null

466,862

null

784,597

null

1

21

java|multithreading

40,757

Do something like <pre><code>private static final int PARTITIONS_COUNT = 12; List<Set<Type>> theSets = new ArrayList<Set<Type>>(PARTITIONS_COUNT); for (int i = 0; i < PARTITIONS_COUNT; i++) { theSets.add(new HashSet<Type>()); } int index = 0; for (Type object : originalSet) { theSets.get(index++ % PARTITIONS_COUNT).add(object); } </code></pre> Now you have partitioned the <code>originalSet</code> into 12 other HashSets.

1,105,241

What permissions needed to connect to SQL Server Integration Services

I need to allow a consultant to connect to SSIS on a SQL Server 2008 box without making him a local administrator. If I add him to the local administrators group, he can connect to SSIS just fine, but it seems that I can't grant him enough permissions through SQL Server to give him these rights without being a local admin. I've added him to every role on the server, every database role in MSDB shy of DBO, and he's still not able to connect. I don't see any SSIS-related Windows groups on the server - Is membership in the Local Administrators group really required to connect to the SSIS instance on a SQL Server? It seems like there is somewhere I should be able to grant "SSIS Admin" rights to a user (even if it's a Windows account and not a SQL account), but I can't find that place. UPDATE: I've found an <a href="http://msdn.microsoft.com/en-us/library/aa337083.aspx" rel="nofollow noreferrer">MSDN article</a> (See the section titled "Eliminating the 'Access if Denied' Error") that describes how to resolve problem, but even after following the steps, I'm still not able to connect. Just wanted to add it to the discussion

2,595,916

4

0

null

2009-07-09 17:10:15.76 UTC

null

2015-03-04 17:54:03.253 UTC

2010-04-27 21:21:32.603 UTC

null

8,114

null

8,114

null

1

5

sql-server-2008|ssis|permissions

42,129

When exactly does he get the "Access is Denied Error"? When trying to connect to SSIS using SSMS (SQL Server Management Studio) and specifying "SSIS" in the connection dialog? Or after this when trying to execute a package or something? I guess it is the first situation and might be able to dig something up when I am back in the office tomorrow. I would let you know of course. Until then: where would your packages be stored if he could connect to the SSIS server: on the file system or in MSDB? If on the file system in the default location (under SQL Servers' root) or somewhere else? I think if you are not storing them in MSDB there are no SQL Server permissions involved here... I was always able to work around this issue using the information provided in the article you mention. Edit: Too bad; I cannot find anything "special" that we did but the steps mentioned in that MSDN article that you followed already. <blockquote> <ul> <li>In the Launch Permission dialog box, add or delete users, and assign the appropriate permissions to the appropriate users and groups. The available permissions are Local Launch, Remote Launch, Local Activation, and Remote Activation. The Launch rights grant or deny permission to start and stop the service; the Activation rights grant or deny permission to connect to the service.</li> <li>In the Access Permission dialog box, add or delete users, and assign the appropriate permissions to the appropriate users and groups.</li> <li>Restart the Integration Services service.</li> </ul> Connecting by using a Local Account If you are working in a local Windows account on a client computer, you can connect to the Integration Services service on a remote computer only if a local account that has the same name and password and the appropriate rights exists on the remote computer. </blockquote>

1,014,505

How does the ACM ICPC Online Judge prevent malicious attacks?

I've spent more than a few hours humbling myself on the <a href="http://acm.uva.es/problemset/" rel="nofollow noreferrer">ACM ICPC's problem set archive</a>, and I've wondered how the online judge is able to compile and run source code from any user and prevent malicious attacks to their system. Are the compiled binaries run from some kind of limited sandbox? How would one go about setting up this kind of sandbox? What OS would you use? How would you launch a user's compiled executable?

1,014,977

4

0

null

2009-06-18 18:49:54.273 UTC

10

2015-01-21 19:40:48.52 UTC

null

100,297

null

16,460

null

1

11

security

1,706

You could run it in a Linux chroot jail, or link it against a libc that doesn't implement any file I/O.

736,524

How Can I Have A Conditional .htaccess Block?

This is an Apache question you've probably come across before. I want to have one source package that I can deploy to my workstation, my staging server, and my production server, but for it to load different .htaccess settings based on what the URL was. Note that I was using a kludge with an IfModule call, but that won't work with our new production server because it shares all the same modules as my staging server. Note I need to bundle SetEnv with these rewrites. Currently if you use RewriteCond, it only ties to the following RewriteRule, but not the SetEnv underneath.

773,849

4

0

null

2009-04-10 02:23:18.493 UTC

9

2018-10-10 12:30:15.573 UTC

2009-04-10 03:35:13.297 UTC

Volomike

null

Volomike

null

1

18

apache|.htaccess|apache2

17,657

Instead of using SetEnv, use the environment variable setting capabilities of RewriteRule itself: <pre><code>RewriteCond %{HTTP_HOST} =foo.com RewriteRule ^ - [E=VARNAME:foo] RewriteCond %{HTTP_HOST} =bar.com RewriteRule ^ - [E=VARNAME:bar] </code></pre> Although I prefer doing this sort of thing by passing flags to the httpd process at startup and looking for them using IfDefine blocks. <pre><code><IfDefine FOO> SetEnv VARNAME foo </IfDefine> <IfDefine BAR> SetEnv VARNAME bar </IfDefine> </code></pre>

614,619

How to find out which fonts are referenced and which are embedded in a PDF document

We have a little problem with fonts in PDF documents. In order to put the finger on the problem I'd like to inspect, which fonts are actually embedded in the pdf document and which are only referenced. Is there an easy (and cheap as in free) way to do that?

614,748

4

0

null

2009-03-05 12:44:46.273 UTC

44

2016-03-09 07:05:02.223 UTC

null

Jens Schauder

66,686

null

1

128

pdf|fonts

95,379

I finally got an example file that actually seems to have fonts embedded. Using the normal Adobe Reader (or Foxit if you prefer). Select File->Properties on the resulting Dialog choose the Font tab. You will see a list of fonts. The ones that are embedded will state this fact in ( ) behind the font name.

14,653,784

Add condition to this INDEX MATCH formula if it returns #N/A

I have a formula in Sheet3 to look up a value from sheet1 and return it, but sometimes, if values are not in sheet1, I want it to check in sheet2. sheet1 and sheet2 have same data in column A:A, only columns have different values. <pre><code>=INDEX(Sheet1!D:D,MATCH(Sheet3!A2&"MAN_CHANGE",Sheet1!A:A,0)) </code></pre> How can I modify the formula to check in sheet2 if there's not a match in sheet1?

14,653,885

3

0

null

2013-02-01 19:40:57.007 UTC

1

2017-12-01 05:08:45.55 UTC

2015-09-22 23:44:17.623 UTC

null

1,505,120

null

1,512,440

null

1

0

vba|excel|excel-formula|excel-2010

40,470

Glad to hear from you again!) Try this please: <pre><code>=INDEX(Sheet1!D:D,IFERROR(MATCH(Sheet3!A2&"MAN_CHANGE",Sheet1!A:A,0),MATCH(Sheet3!A2&"MAN_CHANGE",Sheet2!A:A,0))) </code></pre>

20,253,322

How can I hide an element when the page is scrolled?

Ok, I'm a little stumped. I'm trying to think the angular way coming from a jQuery background. The problem: I'd just like to hide a fixed element if the window is not scrolled. If someone scrolls down the page I would like to hide the element. I've tried creating a custom directive but I couldnt get it to work as the scroll events were not firing. I'm thinking a simple controller like below, but it doesnt even run. Controller: <pre><code>.controller('MyCtrl2', function($scope,appLoading, $location, $anchorScroll, $window ) { angular.element($window).bind("scroll", function(e) { console.log('scroll') console.log(e.pageYOffset) $scope.visible = false; }) }) </code></pre> VIEW <pre><code><a ng-click="gotoTop()" class="scrollTop" ng-show="{{visible}}">TOP</a> </code></pre> LIVE PREVIEW <a href="http://www.thewinetradition.com.au/new/#/portfolio">http://www.thewinetradition.com.au/new/#/portfolio</a> Any ideas would be greatly appreciated.

20,253,831

1

0

null

2013-11-27 21:22:51.423 UTC

8

2017-04-21 20:05:17.153 UTC

null

1,264,804

null

1,914,605

null

1

32

angularjs|scroll

87,052

A basic directive would look like this. One key point is you'll need to call <code>scope.$apply()</code> since scroll will run outside of the normal <code>digest</code> cycle. <pre><code>app = angular.module('myApp', []); app.directive("scroll", function ($window) { return function(scope, element, attrs) { angular.element($window).bind("scroll", function() { scope.visible = false; scope.$apply(); }); }; }); </code></pre> I found this jsfiddle which demonstrates it nicely <a href="http://jsfiddle.net/88TzF/" rel="noreferrer">http://jsfiddle.net/88TzF/</a>

20,063,068

how to check if mysql query return no result(record not found) using php?

i am passing images file names via textarea to php script to find information about each image in mysql db .The problem is i am trying to output those image file names that not found in mysql db and inform the user which image file names not found in mysql. my current code fails to output those missing records in db but it correctly outputs information about those images found in db. could any one tell me what i am doing wrong ? <pre><code>foreach ($lines as $line) { $line = rtrim($line); $result = mysqli_query($con,"SELECT ID,name,imgUrl,imgPURL FROM testdb WHERE imgUrl like '%$line'"); if (!$result) { die('Invalid query: ' . mysql_error()); } //echo $result; if($result == 0) { // image not found, do stuff.. echo "Not Found Image:".$line; } while($row = mysqli_fetch_array($result)) { $totalRows++; echo "<tr>"; echo "<td>" . $row['ID'] ."(".$totalRows. ")</td>"; echo "<td>" . $row['name'] . "</td>"; echo "<td>" . $row['imgPURL'] . "</td>"; echo "<td>" . $row['imgUrl'] . "</td>"; echo "</tr>"; } }; echo "</table>"; echo " totalRows:".$totalRows; </code></pre>

20,063,116

3

0

null

2013-11-19 04:13:14.803 UTC

3

2017-06-09 03:58:08.367 UTC

null

1,788,736

null

1

3

php|mysql

65,299

You can use <code>mysqli_num_rows()</code> in mysqli <pre><code>if(mysqli_num_rows($result) > 0){ while($row = mysqli_fetch_array($result)) { $totalRows++; echo "<tr>"; echo "<td>" . $row['ID'] ."(".$totalRows. ")</td>"; echo "<td>" . $row['name'] . "</td>"; echo "<td>" . $row['imgPURL'] . "</td>"; echo "<td>" . $row['imgUrl'] . "</td>"; echo "</tr>"; } } else { echo "<tr><td colspan='4'>Not Found Image:".$line.'</td></tr>'; } </code></pre>

21,885,225

Showing custom InfoWindow for Android Maps Utility Library for Android

I'm using the library <a href="http://googlemaps.github.io/android-maps-utils/" rel="nofollow noreferrer">Google Maps Utility for Android</a> which allows to create clustering int he maps and I need to show a custom <code>InfoWindow</code> but I can't find any method to do this. In order to show the info window, I have the following class, and in the method <code>onClusterItemRendered</code> is where I have access to the info of the marker: <pre><code>class MyClusterRenderer extends DefaultClusterRenderer<MarkerItem> { public MyClusterRenderer(Context context, GoogleMap map, ClusterManager<MarkerItem> clusterManager) { super(context, map, clusterManager); } @Override protected void onBeforeClusterItemRendered(MarkerItem item, MarkerOptions markerOptions) { super.onBeforeClusterItemRendered(item, markerOptions); markerOptions.title(String.valueOf(item.getMarkerId())); } @Override protected void onClusterItemRendered(MarkerItem clusterItem, Marker marker) { super.onClusterItemRendered(clusterItem, marker); } } </code></pre> Is there anybody who has used the library and knows how to show a custom <code>InfoWindow</code> such as the way it was used in the Google Maps? Like: <pre><code>getMap().setInfoWindowAdapter(new InfoWindowAdapter() { @Override public View getInfoWindow(Marker arg0) { return null; } @Override public View getInfoContents(Marker arg0) { return null; } }); </code></pre>

21,964,693

2

0

null

2014-02-19 15:36:39.233 UTC

19

2017-08-08 17:27:54.99 UTC

null

3,885,376

null

257,948

null

1

32

android|google-maps|google-maps-android-api-2|markerclusterer

12,826

Yes, this can be done. <code>ClusterManager</code> maintains two <code>MarkerManager.Collections</code>: <ul> <li>one for cluster markers, and</li> <li>one for individual item markers</li> </ul> You can set a custom <code>InfoWindowAdapter</code> for each of these kinds of markers independently. <hr> <h2>Implementation</h2> First, install your ClusterManager's MarkerManager as the map's InfoWindowAdapter: <pre><code>ClusterManager<MarkerItem> clusterMgr = new ClusterManager<MarkerItem>(context, map); map.setInfoWindowAdapter(clusterMgr.getMarkerManager()); </code></pre> Next, install your custom <code>InfoWindowAdapter</code> as the adapter for one or both of the marker collections: <pre><code>clusterMgr.getClusterMarkerCollection().setOnInfoWindowAdapter(new MyCustomAdapterForClusters()); clusterMgr.getMarkerCollection().setOnInfoWindowAdapter(new MyCustomAdapterForItems()); </code></pre> The final piece is mapping the raw <code>Marker</code> object that you'll receive in your custom InfoWindowAdapter's callback to the <code>ClusterItem</code> object(s) that you added to the map in the first place. This can be achieved using the onClusterClick and onClusterItemClick listeners, as follows: <pre><code>map.setOnMarkerClickListener(clusterMgr); clusterMgr.setOnClusterClickListener(new OnClusterClickListener<MarkerItem>() { @Override public boolean onClusterClick(Cluster<MarkerItem> cluster) { clickedCluster = cluster; // remember for use later in the Adapter return false; } }); clusterMgr.setOnClusterItemClickListener(new OnClusterItemClickListener<MarkerItem>() { @Override public boolean onClusterItemClick(MarkerItem item) { clickedClusterItem = item; return false; } }); </code></pre> <hr> Now you have everything you need to assemble your custom InfoWindow content in your respective Adapters! For example: <pre><code>class MyCustomAdapterForClusters implements InfoWindowAdapter { @Override public View getInfoContents(Marker marker) { if (clickedCluster != null) { for (MarkerItem item : clickedCluster.getItems()) { // Extract data from each item in the cluster as needed } } // build your custom view // ... return view; } } </code></pre>

50,070,384

SQSListener with ThreadpoolExecutor

In the below example , I am setting the max and core pool size to 1. However no messages are being processed. When I enable debug log , I am able to see the messages being pulled from SQS , but I guess it is not being processed / deleted. However when I increase core and max pool size to 2 , the messages seem to be processed. EDIT I believe Spring maybe allocating a thread for receiver which reads data off the queue and hence it is unable to allocate a thread to listener which is processing the message. When I increased the corepoolsize to 2 , I saw that messages were being read off the queue. When I added another listener (for dead letter queue) , I encountered the same issue - 2 threads were not sufficient as the messages were not being processed. When I increased the corepoolsize to 3 , it started processing the messages. I assume in this case , 1 thread was allocated to read messages off the queue and 2 listeners were assigned 1 thread each. <pre><code>@Configuration public class SqsListenerConfiguration { @Bean @ConfigurationProperties(prefix = "aws.configuration") public ClientConfiguration clientConfiguration() { return new ClientConfiguration(); } @Bean @Primary public AWSCredentialsProvider awsCredentialsProvider() { ProfileCredentialsProvider credentialsProvider = new ProfileCredentialsProvider("credential"); try { credentialsProvider.getCredentials(); System.out.println(credentialsProvider.getCredentials().getAWSAccessKeyId()); System.out.println(credentialsProvider.getCredentials().getAWSSecretKey()); } catch (Exception e) { throw new AmazonClientException( "Cannot load the credentials from the credential profiles file. " + "Please make sure that your credentials file is at the correct " + "location (~/.aws/credentials), and is in valid format.", e); } return credentialsProvider; } @Bean @Primary public AmazonSQSAsync amazonSQSAsync() { return AmazonSQSAsyncClientBuilder.standard(). withCredentials(awsCredentialsProvider()). withClientConfiguration(clientConfiguration()). build(); } @Bean @ConfigurationProperties(prefix = "aws.queue") public SimpleMessageListenerContainer simpleMessageListenerContainer(AmazonSQSAsync amazonSQSAsync) { SimpleMessageListenerContainer simpleMessageListenerContainer = new SimpleMessageListenerContainer(); simpleMessageListenerContainer.setAmazonSqs(amazonSQSAsync); simpleMessageListenerContainer.setMessageHandler(queueMessageHandler()); simpleMessageListenerContainer.setMaxNumberOfMessages(10); simpleMessageListenerContainer.setTaskExecutor(threadPoolTaskExecutor()); return simpleMessageListenerContainer; } @Bean public QueueMessageHandler queueMessageHandler() { QueueMessageHandlerFactory queueMessageHandlerFactory = new QueueMessageHandlerFactory(); queueMessageHandlerFactory.setAmazonSqs(amazonSQSAsync()); QueueMessageHandler queueMessageHandler = queueMessageHandlerFactory.createQueueMessageHandler(); return queueMessageHandler; } @Bean public ThreadPoolTaskExecutor threadPoolTaskExecutor() { ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor(); executor.setCorePoolSize(1); executor.setMaxPoolSize(1); executor.setThreadNamePrefix("oaoQueueExecutor"); executor.initialize(); return executor; } @Bean public QueueMessagingTemplate messagingTemplate(@Autowired AmazonSQSAsync amazonSQSAsync) { return new QueueMessagingTemplate(amazonSQSAsync); } } </code></pre> Listener Config <pre><code> @SqsListener(value = "${oao.sqs.url}", deletionPolicy = SqsMessageDeletionPolicy.ON_SUCCESS) public void onMessage(String serviceData, @Header("MessageId") String messageId, @Header("ApproximateFirstReceiveTimestamp") String approximateFirstReceiveTimestamp) { System.out.println(" Data = " + serviceData + " MessageId = " + messageId); repository.execute(serviceData); } </code></pre>

50,103,237

1

null

2018-04-27 21:13:16.837 UTC

9

2021-07-30 17:06:51.88 UTC

2018-07-12 00:57:08.483 UTC

null

174,777

null

1,042,646

null

1

13

java|spring|amazon-web-services|spring-cloud|amazon-sqs

9,716

By setting <code>corePoolSize</code> and <code>maximumPoolSize</code> the same, you create a <code>fixed-size thread pool</code>. A very good explanation of the rules are documented <a href="http://www.bigsoft.co.uk/blog/2009/11/27/rules-of-a-threadpoolexecutor-pool-size" rel="noreferrer">here</a> Setting <code>maxPoolSize</code> implicitly allows for tasks to get dropped. However, the default queue capacity is <code>Integer.MAX_VALUE</code>, which, for practical purposes, is infinity. Something to watch out for is that <code>ThreadPoolTaskExecutor</code> uses a <code>ThreadPoolExecutor</code> underneath, which has a somewhat unusual approach to queueing, described in <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ThreadPoolExecutor.html" rel="noreferrer">the docs</a>: <blockquote> If <code>corePoolSize</code> or more threads are running, the Executor always prefers queuing a request rather than adding a new thread. </blockquote> This means that <code>maxPoolSize</code> is only relevant when the queue is full, otherwise the number of threads will never grow beyond <code>corePoolSize</code>. As an example, if we submit tasks that never complete to the thread pool: <ul> <li>the first <code>corePoolSize</code> submissions will start a new thread each;</li> <li>after that, all submissions go to the queue;</li> <li>if the queue is finite and its capacity is exhausted, each submission starts a new thread, up to <code>maxPoolSize</code>;</li> <li>when both the pool and the queue are full, new submissions are rejected.</li> </ul> Queuing - Read the <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ThreadPoolExecutor.html" rel="noreferrer">docs</a> Any <code>BlockingQueue</code> may be used to transfer and hold submitted tasks. The use of this queue interacts with pool sizing: <ul> <li>If fewer than corePoolSize threads are running, the Executor always prefers adding a new thread rather than queuing. </li> <li>If corePoolSize or more threads are running, the Executor always prefers queuing a request rather than adding a new thread. </li> <li>If a request cannot be queued, a new thread is created unless this would exceed maximumPoolSize, in which case, the task will be rejected.</li> </ul> <blockquote> <code>Unbounded queues</code>. Using an unbounded queue (for example a <code>LinkedBlockingQueue</code> without a predefined capacity) will cause new tasks to be queued in cases where all corePoolSize threads are busy. Thus, no more than <code>corePoolSize</code> threads will ever be created. (And the value of the <code>maximumPoolSize</code> therefore doesn't have any effect.) </blockquote> <ol> <li>If the number of threads is less than the <code>corePoolSize</code>, create a new Thread to run a new task.</li> <li>If the number of threads is equal (or greater than) the <code>corePoolSize</code>, put the task into the queue.</li> <li>If the queue is full, and the number of threads is less than the <code>maxPoolSize</code>, create a new thread to run tasks in.</li> <li>If the queue is full, and the number of threads is greater than or equal to <code>maxPoolSize</code>, reject the task.</li> </ol>

19,172,565

how append date build to versionNameSuffix on gradle

I am using Android Studio and I need to append a suffix to the <code>versionNameSuffix</code> on my Android build.gradle file. I have three different build types and I only need to append the datetime to my "beta" release. My actual file is: <pre class="lang-groovy prettyprint-override"><code>defaultConfig { versionCode 14 versionName "0.7.5" minSdkVersion 9 targetSdkVersion 18 } buildTypes { beta { packageNameSuffix ".beta" versionNameSuffix "-beta" signingConfig signingConfigs.debug } .... } </code></pre> For testing and automatic deploy, I need to get a final versionName like: <code>0.7.5-beta-build20131004</code>, <code>0.7.5-beta-build1380855996</code> or something like that. Any ideas?

19,184,323

7

0

null

2013-10-04 03:11:11.497 UTC

20

2022-05-04 08:03:41.353 UTC

2022-02-18 10:05:51.147 UTC

null

8,583,692

null

1,116,322

null

1

89

android|android-studio|gradle|android-gradle-plugin|build.gradle

64,066

<pre class="lang-groovy prettyprint-override"><code>beta { packageNameSuffix ".beta" versionNameSuffix "-beta" + "-build" + getDate() signingConfig signingConfigs.debug } def getDate() { def date = new Date() def formattedDate = date.format('yyyyMMddHHmmss') return formattedDate } </code></pre> Condensed: <pre><code>def getDate() { return new Date().format('yyyyMMddHHmmss') } </code></pre>

19,125,266

How to take heap snapshot of Xamarin.Android's Mono VM?

Background: I am trying to track down a memory leak in a Xamarin.Android app. Using DDMS and Eclipse Memory Profiler, I am able to see which objects are alive. When trying to track what is holding them alive (GC Root), I only see "Native stack" (of course). How can I take a heap snapshot of the MONO VM? So I can later use it with i.e. heapshot tool? Or are there ANY OTHER TECHNIQUES I can use to find what is holding an object alive in Xamarin.Android's .NET part? Is it possible to do something from within the program?

19,126,051

2

0

null

2013-10-01 20:25:58.63 UTC

9

2014-08-20 09:24:24.71 UTC

null

38,325

null

1

6

android|memory-leaks|xamarin|memory-profiling|heap-dump

5,195

<blockquote> How can I take a heap snapshot of the MONO VM? So I can later use it with i.e. heapshot tool? </blockquote> It is now possible to get heap snapshots of the Mono VM (tested with Xamarin.Android 4.8.2 beta; may apply to prior releases, your mileage may vary). It's a four step process: <ol> <li>Enable heapshot logging: <pre><code>adb shell setprop debug.mono.profile log:heapshot </code></pre></li> <li>Start your app. (If your app was already running before (1), kill and restart it.) Use your app.</li> <li>Grab the profile data for your app: <pre><code>adb pull /data/data/@PACKAGE_NAME@/files/.__override__/profile.mlpd </code></pre> <code>@PACKAGE_NAME@</code> is the package name of your application, e.g. if your package is <code>FooBar.FooBar-Signed.apk</code>, then <code>@PACKAGE_NAME@</code> will be <code>FooBar.FooBar</code>.</li> <li>Analyze the data: <pre><code>mprof-report profile.mlpd </code></pre> <code>mprof-report</code> is included with Mono.</li> </ol> Note: <code>profile.mlpd</code> is only updated when a GC occurs, so you may want to call <code>GC.Collect()</code> at some "well known" point to ensure that <code>profile.mlpd</code> is regularly updated .

19,052,354

SIGHUP for reloading configuration

According to <code>signal(7)</code>, <code>SIGHUP</code> is used to detect hangup on controlling terminal or death of controlling process. However, I have come across a lot of OSS daemons(services) where <code>SIGHUP</code> is used to initiate a reload of configuration. Here are a few examples: <code>hostapd</code>, <code>sshd</code>, <code>snort</code> etc. Is this a standard(or a generally acceptable) way to implement a reload? If not, whats recommended?

28,327,659

2

0

null

2013-09-27 13:43:05.97 UTC

6

2016-02-16 08:59:32.64 UTC

2014-07-16 07:25:05.56 UTC

null

1,044,366

null

1,865,794

null

1

29

linux|unix|configuration|signals|reload

26,955

SIGHUP as a notification about terminal closing event doesn't make sense for a daemon, because deamons are detached from their terminal. So the system will never send this signal to them. Then it is common practice for daemons to use it for another meaning, typically reloading the daemon's configuration. This is not a rule, just kind of a convention. That's why it's not documented in the manpage. See the wikipedia entry for <a href="http://en.wikipedia.org/wiki/Unix_signal#SIGHUP" rel="noreferrer">SIGHUP</a> and from there, <a href="http://perldoc.perl.org/perlipc.html#Handling-the-SIGHUP-Signal-in-Daemons" rel="noreferrer">a longer description with implementation example</a>

49,522,776

Helm: How to Override Value with Periods in Name

I am trying to script setup of Jenkins so that I can create and tear down Jenkins clusters programmatically with helm. I've hit an annoying snag where I cannot set a key with dots in the name. My helm values.yaml file looks like this: <pre><code>--- rbac: install: true Master: HostName: jenkins.mycompany.com ServiceType: ClusterIP ImageTag: lts InstallPlugins: - kubernetes - workflow-aggregator - workflow-job - credentials-binding - git - blueocean - github - github-oauth ScriptApproval: - "method groovy.json.JsonSlurperClassic parseText java.lang.String" - "new groovy.json.JsonSlurperClassic" - "staticMethod org.codehaus.groovy.runtime.DefaultGroovyMethods leftShift java.util.Map java.util.Map" - "staticMethod org.codehaus.groovy.runtime.DefaultGroovyMethods split java.lang.String" - "method java.util.Collection toArray" - "staticMethod org.kohsuke.groovy.sandbox.impl.Checker checkedCall java.lang.Object boolean boolean java.lang.String java.lang.Object[]" - "staticMethod org.kohsuke.groovy.sandbox.impl.Checker checkedGetProperty java.lang.Object boolean boolean java.lang.Object" Ingress: Annotations: kubernetes.io/ingress.class: nginx kubernetes.io/tls-acme: "true" TLS: - secretName: jenkins-mycompany-com hosts: - jenkins.mycompany.com Memory: "2Gi" # This breaks the init container # RunAsUser: 1000 # FSGroup: 1000 Agent: Enabled: false ImageTag: latest </code></pre> After installing <code>cert-manager</code>, <code>external-dns</code>, <code>nginx-ingress</code> (for now via a bash script) I install it like so: <pre><code>helm install --values helm/jenkins.yml stable/jenkins </code></pre> I failed to read the letsencrypt docs at all, so throughout the course of testing I used my production quota. I want to be able to add an annotation to the <code>Ingress</code>: <code>certmanager.k8s.io/cluster-issuer: letsencrypt-staging</code> so that I can continue testing (and set this as the default in the future, overriding when I'm ready for production). The trouble is... I can't figure out how to pass this via the <code>--set</code> flag, since there are periods in the key name. I've tried: <pre><code>helm install --values helm/jenkins.yml stable/jenkins --set Master.Ingress.Annotations.certmanager.k8s.io/cluster-issuer=letsencrypt-staging </code></pre> and <pre><code>helm install --values helm/jenkins.yml stable/jenkins --set Master.Ingress.Annotations.certmanager\.k8s\.io/cluster-issuer=letsencrypt-staging </code></pre> I can of course solve this by adding a value that I use as a flag, but it's less explicit. Is there any way to set it directly?

50,399,612

2

0

null

2018-03-27 21:34:39.257 UTC

4

2021-02-03 16:27:03.06 UTC

2018-03-27 21:44:39.963 UTC

null

1,342,445

null

1,342,445

null

1

31

kubernetes-helm

15,585

You need to enclose the key with quotations and then escape the dots <pre><code>helm install --values helm/jenkins.yml stable/jenkins --set Master.Ingress.Annotations."certmanager\.k8s\.io/cluster-issuer"=letsencrypt-staging </code></pre>

40,663,198

ng-reflect-model shows correct value but not reflecting in input

Encountered a very weird issue where my application misbehaves in a very specific user case. I have a portal where users can add questions and answers and then edit them. In this case when I remove a set(q+a) and then try adding it, the model is getting updated but my view takes values from placeholders and updates itself. Here I am just splicing and pushing values in an array and rendering using ngFor. The last element is a dummy and that is used to enter values which are pushed up. Attaching a screenshot if it makes any sense. You can see that for the textbox, the ng-reflect-model shows correct question, but the element itself displays the placeholder text. <a href="https://i.stack.imgur.com/h7PY3.png" rel="noreferrer"><img src="https://i.stack.imgur.com/h7PY3.png" alt=""></a>

41,504,893

3

null

2016-11-17 19:14:33.713 UTC

8

2019-12-05 14:39:34.537 UTC

null

2,424,990

null

1

17

angular|angular2-template|angular2-forms

24,486

Apparently the issue was being caused because Angular wasn't able to track the elements of my array properly. I found this out very hard way. So just adding a trackBy attribute to my ngFor, I was able to resolve this. Added this to my component: <pre><code>customTrackBy(index: number, obj: any): any { return index; } </code></pre> and then in the template: <pre><code><div class="margin-bottom-15" *ngFor="let assessment of language.assessments; trackBy:customTrackBy"> </code></pre> So basically I am asking angular to track my elements in the array by index. It resolved the issue. Here assessment is the model for each of the question-answer set.

52,995,962

Kubernetes namespace default service account

If not specified, pods are run under a default service account. <ul> <li>How can I check what the default service account is authorized to do?</li> <li>Do we need it to be mounted there with every pod?</li> <li>If not, how can we disable this behavior on the namespace level or cluster level.</li> <li>What other use cases the default service account should be handling?</li> <li>Can we use it as a service account to create and manage the Kubernetes deployments in a namespace? For example we will not use real user accounts to create things in the cluster because users come and go.</li> </ul> Environment: Kubernetes 1.12 , with RBAC

52,998,473

4

0

null

2018-10-25 18:34:03.9 UTC

11

2021-12-02 15:03:19.693 UTC

2020-08-24 01:32:04.277 UTC

null

219,658

null

4,550,110

null

1

25

kubernetes|rbac

35,459

<ol> <li>A default service account is automatically created for each namespace.</li> </ol> <blockquote> kubectl get serviceaccount NAME SECRETS AGE default 1 1d </blockquote> <ol start="2"> <li>Service accounts can be added when required. Each pod is associated with exactly one service account but multiple pods can use the same service account. </li> <li>A pod can only use one service account from the same namespace. </li> <li>Service account are assigned to a pod by specifying the account’s name in the pod manifest. If you don’t assign it explicitly the pod will use the default service account. </li> <li>The default permissions for a service account don't allow it to list or modify any resources. The default service account isn't allowed to view cluster state let alone modify it in any way. </li> <li>By default, the default service account in a namespace has no permissions other than those of an unauthenticated user. </li> <li>Therefore pods by default can’t even view cluster state. Its up to you to grant them appropriate permissions to do that. </li> </ol> <blockquote> kubectl exec -it test -n foo sh / # curl localhost:8001/api/v1/namespaces/foo/services { "kind": "Status", "apiVersion": "v1", "metadata": { }, "status": "Failure", "message": "services is forbidden: User "system:serviceaccount:foo:default" cannot list resource "services" in API group "" in the namespace "foo"", "reason": "Forbidden", "details": { "kind": "services" }, "code": 403 </blockquote> as can be seen above the default service account cannot list services but when given proper role and role binding like below <pre><code>apiVersion: rbac.authorization.k8s.io/v1 kind: Role metadata: creationTimestamp: null name: foo-role namespace: foo rules: - apiGroups: - "" resources: - services verbs: - get - list apiVersion: rbac.authorization.k8s.io/v1 kind: RoleBinding metadata: creationTimestamp: null name: test-foo namespace: foo roleRef: apiGroup: rbac.authorization.k8s.io kind: Role name: foo-role subjects: - kind: ServiceAccount name: default namespace: foo </code></pre> now i am able to list the resurce service <pre><code>kubectl exec -it test -n foo sh / # curl localhost:8001/api/v1/namespaces/foo/services { "kind": "ServiceList", "apiVersion": "v1", "metadata": { "selfLink": "/api/v1/namespaces/bar/services", "resourceVersion": "457324" }, "items": [] </code></pre> <ol start="8"> <li>Giving all your service accounts the <code>clusteradmin</code> ClusterRole is a bad idea. It is best to give everyone only the permissions they need to do their job and not a single permission more. </li> <li>It’s a good idea to create a specific service account for each pod and then associate it with a tailor-made role or a ClusterRole through a RoleBinding. </li> <li>If one of your pods only needs to read pods while the other also needs to modify them then create two different service accounts and make those pods use them by specifying the <code>serviceaccountName</code> property in the pod spec. </li> </ol> You can refer the below link for an in-depth explanation. <a href="https://developer.ibm.com/recipes/tutorials/service-accounts-and-auditing-in-kubernetes/" rel="noreferrer">Service account example with roles</a> You can check <code>kubectl explain serviceaccount.automountServiceAccountToken</code> and edit the service account kubectl edit serviceaccount default -o yaml <pre><code>apiVersion: v1 automountServiceAccountToken: false kind: ServiceAccount metadata: creationTimestamp: 2018-10-14T08:26:37Z name: default namespace: default resourceVersion: "459688" selfLink: /api/v1/namespaces/default/serviceaccounts/default uid: de71e624-cf8a-11e8-abce-0642c77524e8 secrets: - name: default-token-q66j4 </code></pre> Once this change is done whichever pod you spawn doesn't have a serviceaccount token as can be seen below. <pre><code>kubectl exec tp -it bash root@tp:/# cd /var/run/secrets/kubernetes.io/serviceaccount bash: cd: /var/run/secrets/kubernetes.io/serviceaccount: No such file or directory </code></pre>

22,184,012

How to put an existing DataTable into a DataSet?

That's just it. I have an existing DataTable, and I would like to make it a part of a existing DataSet. Any ideas on how to go about it? I tried a couple of things, but none of them work...

22,184,110

2

0

null

2014-03-04 21:58:36.97 UTC

null

2014-03-04 22:10:00.48 UTC

null

3,380,611

null

1

3

vb.net

40,429

The Dataset contains a collection of Tables, and, as with every collection, you could use the method Add to add your table to the dataset. However there is one thing to be aware of. If your table is already part of another dataset (probably because you used the DataAdapter.Fill(DataSet) method), then you should remove the table from the previous dataset tables collection before adding it to the new one. <pre><code>Dim dsNew = New DataSet() ' The dataset where you want to add your table Dim dt As DataTable = GetTable() ' Get the table from your storage Dim dsOld = dt.DataSet ' Retrieve the DataSet where the table has been originally added if dsOld IsNot Nothing Then dsOld.Tables.Remove(dt.TableName) ' Remove the table from its dataset tables collection End If dsNew.Tables.Add(dt) ' Add to the destination dataset. </code></pre>

23,679,367

What does the PF function do in Primefaces?

On many places one can find usage of a function <code>PF</code> with Primefaces. For example in this <a href="https://stackoverflow.com/questions/17922306/primefaces-dialog-does-not-show">answer</a> From what I have seen so far it seems to be a magic "make it work a little better" function. But I don't believe in this kind of stuff so: What does this function do? And where can I find documentation about it?

23,681,573

3

1

null

2014-05-15 13:14:34.17 UTC

3

2017-11-23 19:03:03.537 UTC

2017-05-23 10:30:45.363 UTC

null

-1

null

66,686

null

1

35

jsf-2|primefaces

48,559

<code>PF</code> is a Javascript function. In Primefaces 4.0 the Javascript scope of widgets changed. Prior to version 4.0 you could open a dialog widget with <code>widgetVar.show();</code>. In Primefaces 4.0 and above the widgets are stored in a Javascript widget array. When you call PF('widgetVar') it is looking for the widget in the array and returning it. <pre><code>PF=function(d){ var c=b.widgets[d]; if(!c){ if(a.console&&console.log){ console.log("Widget for var '"+d+"' not available!") } b.error("Widget for var '"+d+"' not available!") } return c }; </code></pre> I could not find much on this either this is what I was able to decipher using Chrome's developer tools.

37,168,888

iOS 9 : Warning "All interface orientations must be supported unless the app requires full screen" for universal app

I'm working on an universal app with all orientations on iPad and only portrait on iPhone. The app works well with split-screen multitasking on iOS 9 compatible iPad, but I have this warning: <pre><code>All interface orientations must be supported unless the app requires full screen </code></pre> And my app does not require full screen. It's only limited to portrait on iPhone... Shouldn't it be ok? Is there a way to declare Requires Full Screen only on iPhone? Thanks in advance By the way I'm using Xcode 7.3.1

43,623,382

5

2

null

2016-05-11 16:55:08.603 UTC

13

2018-07-09 11:05:46.983 UTC

null

842,327

null

1

56

ios|iphone|xcode|ipad|multitasking

24,197

The solution to this is to use "Device Specific Keys": <a href="https://developer.apple.com/library/content/documentation/General/Reference/InfoPlistKeyReference/Articles/AboutInformationPropertyListFiles.html#//apple_ref/doc/uid/TP40009254-SW9" rel="noreferrer">https://developer.apple.com/library/content/documentation/General/Reference/InfoPlistKeyReference/Articles/AboutInformationPropertyListFiles.html#//apple_ref/doc/uid/TP40009254-SW9</a> Your plist values would therefore look something like: <pre><code><key>UISupportedInterfaceOrientations</key> <array> <string>UIInterfaceOrientationPortrait</string> <string>UIInterfaceOrientationPortraitUpsideDown</string> </array> <key>UISupportedInterfaceOrientations~ipad</key> <array> <string>UIInterfaceOrientationPortrait</string> <string>UIInterfaceOrientationPortraitUpsideDown</string> <string>UIInterfaceOrientationLandscapeLeft</string> <string>UIInterfaceOrientationLandscapeRight</string> </array> <key>UIRequiresFullScreen</key> <true/> <key>UIRequiresFullScreen~ipad</key> <false/> </code></pre> When I remove the iPad specific version of the <code>UIRequiresFullScreen</code> key, I lose the full split-screen functionality - only "slide over" is available because that doesn't affect my app's use of the full device screen. The "Device Orientation" checkboxes are for the default plist values. The only way they wouldn't affect the app on the iPad is if there's a more specific value in the plist, therefore a value specifically for iPad. <blockquote> When the system searches for a key in your app’s Info.plist file, it chooses the key that is most specific to the current device and platform. </blockquote>

30,294,571

multiprocessing.Queue and Queue.Queue are different?

If I use <code>Queue.Queue</code>, then my <code>read()</code> function doesn't work, why? But if I use <code>multiprocessing.Queue</code>, it works well: <pre><code>from multiprocessing import Pool, Process, Queue import os, time # from Queue import Queue def write(q): for v in ['A', 'B', 'C']: print 'Put %s to queue ' % v q.put_nowait(v) time.sleep(0.2) def read(q): while 1: if not q.empty(): v = q.get(True) print "Get %s from queue" % v time.sleep(0.2) else: break if __name__ == '__main__': q = Queue() pw = Process(target=write, args=(q, )) pr = Process(target=read, args=(q, )) pw.start() pw.join() pr.start() pr.join() print "all done..." </code></pre>

30,294,648

1

null

2015-05-18 03:15:56.97 UTC

10

2017-08-03 01:29:24.253 UTC

null

355,230

null

4,737,876

null

1

18

python|multiprocessing

8,327

<code>Queue.Queue</code> is just an in-memory queue that knows how to deal with multiple threads using it at the same time. It only works if both the producer and the consumer are in the same process. Once you have them in separate system processes, which is what the <code>multiprocessing</code> library is about, things are a little more complicated, because the processes no longer share the same memory. You need some kind of inter-process communication method to allow the two processes to talk to each other. It can be a shared memory, a pipe or a socket, or possibly something else. This is what <code>multiprocessing.Queue</code> does. It uses pipes to provide a way for two processes to communicate. It just happens to implement the same API as <code>Queue.Queue</code>, because most Python programmers are already familiar with it. Also note that the way you are using the queue, you have a race condition in your program. Think about what happens if the <code>write</code> process writes to the queue right after you call <code>q.empty()</code> in the <code>read</code> process. Normally you would add some special item to the queue (e.g. <code>None</code>) which would mean that the consumer can stop.

20,763,629

Test whether a directory exists inside a makefile

In his <a href="https://stackoverflow.com/a/59839/671013">answer</a> @Grundlefleck explains how to check whether a directory exists or not. I tried some to use this inside a <code>makefile</code> as follow: <pre><code>foo.bak: foo.bar echo "foo" if [ -d "~/Dropbox" ]; then echo "Dir exists" fi </code></pre> Running <code>make foo.bak</code> (given that <code>foo.bar</code> exists) yields the following error: <pre><code>echo "foo" foo if [ -d "~/Dropbox" ]; then /bin/sh: -c: line 1: syntax error: unexpected end of file make: *** [foo.bak] Error 2 </code></pre> The workaround I made was to have a standalone bash script where the test is implemented and I called the script from the <code>makefile</code>. This, however, sounds very cumbersome. Is there a nicer way to check whether a directory exists from within a <code>makefile</code>?

20,763,829

7

1

null

2013-12-24 16:02:10.933 UTC

19

2021-08-10 17:56:18.093 UTC

2017-05-23 11:33:17.283 UTC

null

-1

null

671,013

null

1

84

bash|makefile

107,377

Make commands, if a shell command, must be in one line, or be on multiple lines using a backslash for line extension. So, this approach will work: <pre><code>foo.bak: foo.bar echo "foo" if [ -d "~/Dropbox" ]; then echo "Dir exists"; fi </code></pre> Or <pre><code>foo.bak: foo.bar echo "foo" if [ -d "~/Dropbox" ]; then \ echo "Dir exists"; \ fi </code></pre>

13,893,634

String split and count the number of occurrences and also

I have a string <pre><code>var stringIHave = "Java$$Java$$jQuery$$Java$$jQuery$$Java$$Java$$Java$$Hibernate$$Java$$Java$$Spring$$Instagram$$jQuery$$jQuery$$"; </code></pre> How to get the count of the number of occurrences of each entry, The occurrence I get, is from a JSON like Java = 8 and etc...

51,579,290

6

1

null

2012-12-15 15:47:32.247 UTC

1

2018-07-29 10:15:52.74 UTC

null

309,721

null

1

6

javascript|jquery|string|split

50,174

Now a days you can do <div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false"> <div class="snippet-code"> <pre class="snippet-code-js lang-js prettyprint-override"><code> const str = "Java$$Java$$jQuery$$Java$$jQuery$$Java$$Java$$Java$$Hibernate$$Java$$Java$$Spring$$Instagram$$jQuery$$jQuery$$"; var result = str.split("$$").reduce(function(acc, curr) { curr && (acc[curr] = (acc[curr] + 1) || 1); return acc }, {}); console.log(result);</code></pre> </div> </div>

48,623,533

How to load navigation properties on an IdentityUser with UserManager

I've extended <code>IdentityUser</code> to include a navigation property for the user's address, however when getting the user with <code>UserManager.FindByEmailAsync</code>, the navigation property isn't populated. Does ASP.NET Identity Core have some way to populate navigation properties like Entity Framework's <code>Include()</code>, or do I have to do it manually? I've set up the navigation property like this: <pre><code>public class MyUser : IdentityUser { public int? AddressId { get; set; } [ForeignKey(nameof(AddressId))] public virtual Address Address { get; set; } } public class Address { [Key] public int Id { get; set; } public string Street { get; set; } public string Town { get; set; } public string Country { get; set; } } </code></pre>

48,623,646

5

null

2018-02-05 13:19:44.88 UTC

9

2022-05-23 11:30:29.243 UTC

2018-02-05 13:23:06.253 UTC

null

2,141,621

null

1,096,201

null

1

40

c#|asp.net-core|entity-framework-core|asp.net-core-identity

11,695

Unfortunately, you have to either do it manually or create your own <code>IUserStore<IdentityUser></code> where you load related data in the <code>FindByEmailAsync</code> method: <pre><code>public class MyStore : IUserStore<IdentityUser>, // the rest of the interfaces { // ... implement the dozens of methods public async Task<IdentityUser> FindByEmailAsync(string normalizedEmail, CancellationToken token) { return await context.Users .Include(x => x.Address) .SingleAsync(x => x.Email == normalizedEmail); } } </code></pre> Of course, implementing the entire store just for this isn't the best option. You can also query the store directly, though: <pre><code>UserManager<IdentityUser> userManager; // DI injected var user = await userManager.Users .Include(x => x.Address) .SingleAsync(x => x.NormalizedEmail == email); </code></pre>

39,362,730

How to capture packets for single docker container

There have many container running on the host. And I want to capture packets for the one container of these. Is there any way to do this?

49,277,873

4

null

2016-09-07 06:37:15.677 UTC

11

2022-08-17 19:41:20.27 UTC

null

1,233,410

null

1

38

networking|docker

37,812

You can bind to the network namespace of one container to another: <pre><code>docker run -it --rm --net container:<container_name> \ nicolaka/netshoot tcpdump ... </code></pre> To see more about the netshoot image used above, see: <a href="https://github.com/nicolaka/netshoot" rel="noreferrer">https://github.com/nicolaka/netshoot</a>

6,578,205

Swing JLabel text change on the running application

I have a Swing window which contains a button a text box and a <code>JLabel</code> named as flag. According to the input after I click the button, the label should change from flag to some value. How to achieve this in the same window?

6,578,266

2

0

null

2011-07-05 05:19:41.793 UTC

6

2011-07-05 05:44:02.573 UTC

null

418,556

null

651,362

null

1

5

java|swing|jlabel

121,882

<pre><code>import java.awt.*; import javax.swing.*; import javax.swing.border.*; import java.awt.event.*; public class Test extends JFrame implements ActionListener { private JLabel label; private JTextField field; public Test() { super("The title"); setDefaultCloseOperation(EXIT_ON_CLOSE); setPreferredSize(new Dimension(400, 90)); ((JPanel) getContentPane()).setBorder(new EmptyBorder(13, 13, 13, 13) ); setLayout(new FlowLayout()); JButton btn = new JButton("Change"); btn.setActionCommand("myButton"); btn.addActionListener(this); label = new JLabel("flag"); field = new JTextField(5); add(field); add(btn); add(label); pack(); setLocationRelativeTo(null); setVisible(true); setResizable(false); } public void actionPerformed(ActionEvent e) { if(e.getActionCommand().equals("myButton")) { label.setText(field.getText()); } } public static void main(String[] args) { new Test(); } } </code></pre>

6,483,711

Union in entity framework

I have two tables: Vehicles and Workers. <pre><code>Vehicle(Id, Number) Workers(Id, Name, ContractorVehicleNumber) </code></pre> I would like to write lambda query to return all the vehicles and the contractor vehicles. Something like in sql: <pre><code>SELECT Id, Number FROM Vehicle UNION SELECT NULL, ContractorVehicleNumber FROM Workers </code></pre> This is what I made: <pre><code>public IQueryable<Vehicle> Get(bool includeContractorVehicles) { IQueryable<Vehicle> query = GetQuery(); if (includeContractorVehicles == true) { WorkerRepository rep = new WorkerRepository(); IQueryable<Vehicle> contractorsVehicles = rep.GetWirkers(). Select(x => new Vehicle() { VehicleNumber = x.ContractorVehicleNumber }); query = query.Union(contractorsVehicles); } return query; } </code></pre> But I get an exception: <blockquote> The entity or complex type 'XXXXXXXX' cannot be constructed in a LINQ to Entities query. </blockquote>

6,484,165

2

0

null

2011-06-26 11:49:01.403 UTC

4

2018-04-09 01:42:42.223 UTC

2015-01-21 00:47:26.467 UTC

null

41,956

null

289,246

null

1

18

c#|.net|entity-framework|linq-to-entities

59,239

You cannot construct mapped entity type in projection. Your former example will work only if you create a new special type used for projection: <pre><code>public class VehicleResult { public string Number { get; set; } ... // If you don't need more then one column you can use simple type instead of custom class } </code></pre> And your method will look like: <pre><code>public IQueryable<VehicleResult> Get(bool includeContractorVehicles) { IQueryable<VehicleResult> query = GetQuery().Select(v => new VehicleResult { ... }); if (includeContractorVehicles == true) { WorkerRepository rep = new WorkerRepository(); IQueryable<VehicleResult> contractorsVehicles = rep.GetWorkers(). Select(x => new VehicleResult() { Number = x.ContractorVehicleNumber }); query = query.Union(contractorsVehicles); } return query; } </code></pre>

6,599,071

Array Like Objects in Javascript

I'm wondering how jQuery constructs its array-like object. The key thing I'm trying to work out is how it manages to get the console to interpret it as an array and display it as such. I know it has something to do with the length property, but after playing a bit I can't quite figure it out. I know this has no technical advantage over a normal array like object as in the example below. But I think it's an important semantic element when users are testing and debugging. A normal Array like Object. <pre><code>function foo(){ // Array like objects have a length property and it's properties use integer // based sequential key names, e.g. 0,1,2,3,4,5,6 just like an array. this.length = 1; this[0] = 'hello' } // Just to make sure add the length property to the prototype to match the Array // prototype foo.prototype.length = 0; // Give the Array like object an Array method to test that it works foo.prototype.push = Array.prototype.push // Create an Array like object var bar = new foo; //test it bar.push('world'); console.log(bar); // outputs { 0: 'hello', 1: 'world', length: 2, __proto__: foo } </code></pre> Where as jQuery would output <pre><code>var jQArray = $('div') console.log(jQArray); // outputs [<div></div>,<div></div>,<div></div>,<div></div>] </code></pre> If you run <pre><code>console.dir(jQArray) // Outputs { 0: HTMLDivElement, 1: HTMLDivElement, 2: HTMLDivElement, 3: HTMLDivElement, 4: HTMLDivElement, context: HTMLDocument, length: 5, __proto__: Object[0] } </code></pre> The proto of the jQuery object is especially interesting since its the Object and not jQuery.fn.init as would be expected, also the [0] indicates something as this is what you get when you. <pre><code>console.dir([]) // outputs Array[0] as the object name or Array[x] x being the internal length of the // Array </code></pre> I have no idea how jQuery has set it's proto to be Object[0] but my guess is that answer lies somewhere in there. Anyone got any ideas?

6,599,447

2

null

2011-07-06 15:33:58.93 UTC

22

2015-06-04 01:05:05.81 UTC

null

707,111

null

710,556

null

1

32

javascript|jquery|arrays|javascript-objects

5,928

The object has to have <code>length</code> and <code>splice</code> <pre><code>> var x = {length:2, '0':'foo', '1':'bar', splice:function(){}} > console.log(x); ['foo', 'bar'] </code></pre> <hr> and FYI, the <code>Object[0]</code> as the prototype is for exactly the same reason. The browser is seeing the prototype itself as an array because: <pre><code>$.prototype.length == 0; $.prototype.splice == [].splice; </code></pre>

7,509,978

How can I find out which button was clicked?

I've got my buttons working right, and I'm a listener to each button like this: <pre><code>for(int i = 0; i <= 25; ++i) { buttons[i] = new Button(Character.toString(letters[i])); buttons[i].addActionListener(actionListener); panel1.add(buttons[i]); } </code></pre> Here as you can see the listener is called, and I want to find out which button I'm clicking. Is there a way to do that? <pre><code>ActionListener actionListener = new ActionListener() { public void actionPerformed(ActionEvent actionEvent) { System.out.println(actionEvent.getSource()); } }; </code></pre> I need some way to find the button in the array.

7,510,013

4

1

null

2011-09-22 05:35:43.457 UTC

6

2020-05-29 11:10:31.89 UTC

2011-09-22 15:38:59.013 UTC

null

261,156

null

230,453

null

1

14

java|swing|button|actionlistener

60,496

try this <pre class="lang-java prettyprint-override"><code>ActionListener actionListener = new ActionListener() { public void actionPerformed(ActionEvent actionEvent) { System.out.println(actionEvent.getActionCommand()); } }; </code></pre>

1,439,102

Improving soccer simulation algorithm

In another question, you helped me to build a simulation algorithm for soccer. <a href="https://stackoverflow.com/questions/1427043/soccer-simulation-for-a-game">I got some very good answers there.</a> Thanks again! Now I've coded this algorithm. I would like to improve it and find little mistakes which could be in it. I don't want to discuss how to solve it - as we did in the last question. Now I only want to improve it. Can you help me again please? <ol> <li>Are there any mistakes?</li> <li>Is the structure of the nested if-clauses ok? Could it be improved?</li> <li>Are the tactics integrated correctly according to my description?</li> </ol> Tactical settings which should have an influence on the randomness: <ul> <li>$tactics[x][0] adjustment (1=defensive, 2=neutral, 3=offensive): the higher the value is the weaker is the defense and the stronger is the offense</li> <li>$tactics<a href="https://stackoverflow.com/questions/1427043/soccer-simulation-for-a-game">x</a> speed of play (1=slow, 2=medium, 3=fast): the higher the value is the better are the opportunities but the higher is the risk of getting a quick counter attack</li> <li>$tactics<a href="https://github.com/delight-im/Ballmanager" rel="nofollow noreferrer">x</a> distance of passes (1=short, 2=medium, 3=long): the higher the value is the less but better opportunities you get and the more often you are offside</li> <li>$tactics<a href="https://github.com/delight-im/Ballmanager/blob/master/Website/aa_spieltag_simulation.php" rel="nofollow noreferrer">x</a> creation of changes (1=safe, 2=medium, 3=risky): the higher the value is the better are your opportunities but the higher is the risk of getting a quick counter attack</li> <li>$tactics[x][4] pressure in defense (1=low, 2=medium, 3=high): the higher the value is the more quick counter attacks you will have</li> <li>$tactics[x][5] aggressivity (1=low, 2=medium, 3=high): the higher the value is the more attacks you will stop by fouls</li> </ul> Note: Tactic 0 and tactic 4 are partly integrated in the rest of the engine, not needed in this function. The current algorithm: <pre><code><?php function tactics_weight($wert) { $neuerWert = $wert*0.1+0.8; return $neuerWert; } function strengths_weight($wert) { $neuerWert = log10($wert+1)+0.35; return $neuerWert; } function Chance_Percent($chance, $universe = 100) { $chance = abs(intval($chance)); $universe = abs(intval($universe)); if (mt_rand(1, $universe) <= $chance) { return true; } return false; } function simulate_attack($teamname_att, $teamname_def, $strength_att, $strength_def) { global $minute, $goals, $_POST, $matchReport, $fouls, $yellowCards, $redCards, $offsides, $shots, $tactics; // input values: attacker's name, defender's name, attacker's strength array, defender's strength array // players' strength values vary from 0.1 to 9.9 $matchReport .= ''.$minute.'\': '.comment_action($teamname_att, 'attack'); $offense_strength = $strength_att['forwards']/$strength_def['defenders']; $defense_strength = $strength_def['defenders']/$strength_att['forwards']; if (Chance_Percent(50*$offense_strength*tactics_weight($tactics[$teamname_att][1])/tactics_weight($tactics[$teamname_att][2]))) { // attacking team passes 1st third of opponent's field side $matchReport .= ' '.comment_action($teamname_def, 'advance'); if (Chance_Percent(25*tactics_weight($tactics[$teamname_def][5]))) { // the defending team fouls the attacking team $fouls[$teamname_def]++; $matchReport .= ' '.comment_action($teamname_def, 'foul'); if (Chance_Percent(43)) { // yellow card for the defending team $yellowCards[$teamname_def]++; $matchReport .= ' '.comment_action($teamname_def, 'yellow'); } elseif (Chance_Percent(3)) { // red card for the defending team $redCards[$teamname_def]++; $matchReport .= ' '.comment_action($teamname_def, 'red'); } // indirect free kick $matchReport .= ' '.comment_action($teamname_att, 'iFreeKick'); if (Chance_Percent(25*strengths_weight($strength_att['forwards']))) { // shot at the goal $shots[$teamname_att]++; $matchReport .= ' '.comment_action($teamname_att, 'iFreeKick_shot'); if (Chance_Percent(25/strengths_weight($strength_def['goalkeeper']))) { // attacking team scores $goals[$teamname_att]++; $matchReport .= ' '.comment_action($teamname_att, 'shot_score'); } else { // defending goalkeeper saves $matchReport .= ' '.comment_action($teamname_def, 'iFreeKick_shot_save'); } } else { // defending team cleares the ball $matchReport .= ' '.comment_action($teamname_def, 'iFreeKick_clear'); } } elseif (Chance_Percent(17)*tactics_weight($tactics[$teamname_att][2])) { // attacking team is caught offside $offsides[$teamname_att]++; $matchReport .= ' '.comment_action($teamname_def, 'offside'); } else { // attack isn't interrupted // attack passes the 2nd third of the opponent's field side - good chance $matchReport .= ' '.comment_action($teamname_def, 'advance_further'); if (Chance_Percent(25*tactics_weight($tactics[$teamname_def][5]))) { // the defending team fouls the attacking team $fouls[$teamname_def]++; $matchReport .= ' '.comment_action($teamname_def, 'foul'); if (Chance_Percent(43)) { // yellow card for the defending team $yellowCards[$teamname_def]++; $matchReport .= ' '.comment_action($teamname_def, 'yellow'); } elseif (Chance_Percent(3)) { // red card for the defending team $redCards[$teamname_def]++; $matchReport .= ' '.comment_action($teamname_def, 'red'); } if (Chance_Percent(19)) { // penalty for the attacking team $shots[$teamname_att]++; $matchReport .= ' '.comment_action($teamname_att, 'penalty'); if (Chance_Percent(77)) { // attacking team scores $goals[$teamname_att]++; $matchReport .= ' '.comment_action($teamname_att, 'shot_score'); } elseif (Chance_Percent(50)) { // shot misses the goal $matchReport .= ' '.comment_action($teamname_att, 'penalty_miss'); } else { // defending goalkeeper saves $matchReport .= ' '.comment_action($teamname_def, 'penalty_save'); } } else { // direct free kick $matchReport .= ' '.comment_action($teamname_att, 'dFreeKick'); if (Chance_Percent(33*strengths_weight($strength_att['forwards']))) { // shot at the goal $shots[$teamname_att]++; $matchReport .= ' '.comment_action($teamname_att, 'dFreeKick_shot'); if (Chance_Percent(33/strengths_weight($strength_def['goalkeeper']))) { // attacking team scores $goals[$teamname_att]++; $matchReport .= ' '.comment_action($teamname_att, 'shot_score'); } else { // defending goalkeeper saves $matchReport .= ' '.comment_action($teamname_def, 'dFreeKick_shot_save'); } } else { // defending team cleares the ball $matchReport .= ' '.comment_action($teamname_def, 'dFreeKick_clear'); } } } elseif (Chance_Percent(62*strengths_weight($strength_att['forwards'])*tactics_weight($tactics[$teamname_att][2])*tactics_weight($tactics[$teamname_att][3]))) { // shot at the goal $shots[$teamname_att]++; $matchReport .= ' '.comment_action($teamname_att, 'shot'); if (Chance_Percent(30/strengths_weight($strength_def['goalkeeper']))) { // the attacking team scores $goals[$teamname_att]++; $matchReport .= ' '.comment_action($teamname_att, 'shot_score'); } else { if (Chance_Percent(50)) { // the defending defenders block the shot $matchReport .= ' '.comment_action($teamname_def, 'shot_block'); } else { // the defending goalkeeper saves $matchReport .= ' '.comment_action($teamname_def, 'shot_save'); } } } else { // attack is stopped $matchReport .= ' '.comment_action($teamname_def, 'stopped'); if (Chance_Percent(15*$defense_strength*tactics_weight($tactics[$teamname_att][1])*tactics_weight($tactics[$teamname_att][3])*tactics_weight($tactics[$teamname_def][4]))) { // quick counter attack - playing on the break $strength_att['defenders'] = $strength_att['defenders']*0.8; // weaken the current attacking team's defense $matchReport .= ' '.comment_action($teamname_def, 'quickCounterAttack'); $matchReport .= ' ['.$goals[$_POST['team1']].':'.$goals[$_POST['team2']].']'; // close comment line return simulate_attack($teamname_def, $teamname_att, $strength_def, $strength_att); // new attack - this one is finished } } } } // attacking team doesn't pass 1st third of opponent's field side elseif (Chance_Percent(15*$defense_strength*tactics_weight($tactics[$teamname_att][1])*tactics_weight($tactics[$teamname_att][3])*tactics_weight($tactics[$teamname_def][4]))) { // attack is stopped // quick counter attack - playing on the break $matchReport .= ' '.comment_action($teamname_def, 'stopped'); $strength_att['defenders'] = $strength_att['defenders']*0.8; // weaken the current attacking team's defense $matchReport .= ' '.comment_action($teamname_def, 'quickCounterAttack'); $matchReport .= ' ['.$goals[$_POST['team1']].':'.$goals[$_POST['team2']].']'; // close comment line return simulate_attack($teamname_def, $teamname_att, $strength_def, $strength_att); // new attack - this one is finished } else { // ball goes into touch - out of the field $matchReport .= ' '.comment_action($teamname_def, 'throwIn'); if (Chance_Percent(33)) { // if a new chance is created if (Chance_Percent(50)) { // throw-in for the attacking team $matchReport .= ' '.comment_action($teamname_def, 'throwIn_att'); $matchReport .= ' ['.$goals[$_POST['team1']].':'.$goals[$_POST['team2']].']'; // close comment line return simulate_attack($teamname_att, $teamname_def, $strength_att, $strength_def); // new attack - this one is finished } else { // throw-in for the defending team $matchReport .= ' '.comment_action($teamname_def, 'throwIn_def'); $matchReport .= ' ['.$goals[$_POST['team1']].':'.$goals[$_POST['team2']].']'; // close comment line return simulate_attack($teamname_def, $teamname_att, $strength_def, $strength_att); // new attack - this one is finished } } } $matchReport .= ' ['.$goals[$_POST['team1']].':'.$goals[$_POST['team2']].']'; // close comment line return TRUE; // finish the attack } </code></pre> Update (2014): A few years later, I have now released the full code base of the game as <a href="https://github.com/delight-im/Ballmanager" rel="nofollow noreferrer">open-source on GitHub</a>. You'll find the specific implementation of this simulation <a href="https://github.com/delight-im/Ballmanager/blob/master/Website/aa_spieltag_simulation.php" rel="nofollow noreferrer">in this file</a>, if anyone is interested.

1,468,628

4

5

null

2009-09-17 14:04:12.09 UTC

12

2014-07-10 03:17:10.79 UTC

2017-05-23 11:45:28.967 UTC

null

-1

null

89,818

null

1

7

php|simulation

6,337

In general, it looks like this is a fairly complicated problem, and I'm not sure how efficient you'll get it. That said, I have seen some things which would decidedly help you. First I would type the variables in the parameters. This may not necessarily make your code faster, but it would make it easier to read and debug. Next, I would remove the $teamname_att, $teamname_def parameters and simply have those as values in the associative $strength_att, $strength_def arrays. Since this data is always paired up anyway, this will reduce the risk of accidentally using one team's name as a reference to the other team. This will make it so you will not have to continually look up values in arrays: <pre><code>// replace all $tactics[$teamname_att] with $attackers $attackers = $tactics[$teamname_att]; $defenders = $tactics[$teamname_def]; // Now do the same with arrays like $_POST[ "team1" ]; </code></pre> You have three helper functions which all have the pattern: <pre><code>function foo( $arg ){ $bar = $arg * $value; return $bar; } </code></pre> Since this means that you have to create an extra variable (something which can be costly) each time you run the function, use these instead: <pre><code>function tactics_weight($wert) { return $wert*0.1+0.8; } function strengths_weight($wert) { return log10($wert+1)+0.35; } /* Perhaps I missed it, but I never saw Chance_Percent( $num1, $num2 ) consider using this function instead: (one line instead of four, it also functions more intuitively, Chance_Percent is your chance out of 100 (or per cent) function Chance_Percent( $chance ) { return (mt_rand(1, 100) <= $chance); } */ function Chance_Percent($chance, $universe = 100) { $chance = abs(intval($chance)); // Will you always have a number as $chance? // consider using only abs( $chance ) here. $universe = abs(intval($universe)); return (mt_rand(1, $universe) <= $chance); } </code></pre> I couldn't help but notice this pattern coming up consistently: <pre><code>$matchReport .= ' ' . comment_action($teamname_att, 'attack'); </code></pre> My general experience is that if you move the concatenation of $matchReport into comment_action, then it will be just slightly faster (Generally less than a dozen milliseconds, but since you're calling that function a half-dozen times inside of a recursive function, this could shave a couple tenths of a second per running). I think that this would flow much better (both from a reader's perspective, and from Finally, there are several times where you will use the same call to the same function with the same parameter. Make that call up front: <pre><code>$goalieStrength = strengths_weight($strength_def['goalkeeper']); </code></pre> Hope this helps.

1,399,273

Test if Convert.ChangeType will work between two types

This is a follow-up to <a href="https://stackoverflow.com/questions/1398796/casting-with-reflection">this question</a> about converting values with reflection. Converting an object of a certain type to another type can be done like this: <pre><code>object convertedValue = Convert.ChangeType(value, targetType); </code></pre> Given two Type instances (say FromType and ToType), is there a way to test whether the conversion will succeed? E.g. can I write an extension method like this: <pre><code>public static class TypeExtensions { public static bool CanChangeType(this Type fromType, Type toType) { // what to put here? } } </code></pre> EDIT: This is what I have right now. Ugly, but I don't see another way yet... <pre><code>bool CanChangeType(Type sourceType, Type targetType) { try { var instanceOfSourceType = Activator.CreateInstance(sourceType); Convert.ChangeType(instanceOfSourceType, targetType); return true; // OK, it can be converted } catch (Exception ex) { return false; } </code></pre>

4,102,028

4

null

2009-09-09 12:04:18.757 UTC

3

2019-04-01 15:40:49.64 UTC

2017-05-23 12:34:29.413 UTC

null

-1

null

20,047

null

1

31

c#|reflection

23,544

I was just encountering this same issue, and I used Reflector to look at the source for ChangeType. ChangeType throws exceptions in 3 cases: <ol> <li>conversionType is null</li> <li>value is null</li> <li>value does not implement IConvertible</li> </ol> After those 3 are checked, it is guaranteed that it can be converted. So you can save a lot of performance and remove the try{}/catch{} block by simply checking those 3 things yourself: <pre><code>public static bool CanChangeType(object value, Type conversionType) { if (conversionType == null) { return false; } if (value == null) { return false; } IConvertible convertible = value as IConvertible; if (convertible == null) { return false; } return true; } </code></pre>

1,727,682

WCF Disable Deserialization Order Sensitivity

I have a recurring problem when passing Serialized objects between non-.NET Clients, and .NET WCF Services. When WCF Deserializes objects, it is strictly dependant upon the order of properties. That is, if I define my class as: <pre><code>public class Foo { public int ID { get; set; } public int Bar { get; set; } } </code></pre> Then WCF Will serialize the object as as: <pre><code><Foo> <Bar>123</Bar> <ID>456</ID> </Foo> </code></pre> Note: The properties are serialized in alphabetical order. If you attempt to Deserialize an object which has the positions of <code>Bar</code> and <code>ID</code> swapped, WCF will treat the incorrectly positioned elements as null. Whilst I know I can use the <code>DataMember</code> attribute, and force a specific ordering, I want to reduce the number of times I have to debug issues where fields are 'mysteriously' null. So, my question is: Can you tell the WCF Deserializer to ignore the order of fields, when deserializing objects.

1,727,745

4

0

null

2009-11-13 07:24:35.587 UTC

4

2020-07-02 08:51:42 UTC

null

user111013

null

1

31

.net|wcf|serialization

16,928

There's an old thread on this here: <a href="http://social.msdn.microsoft.com/Forums/en-US/wcf/thread/a891928b-d27a-4ef2-83b3-ee407c6b9187" rel="noreferrer">http://social.msdn.microsoft.com/Forums/en-US/wcf/thread/a891928b-d27a-4ef2-83b3-ee407c6b9187</a> Looks like the only option is to swap the serializer, but then it becomes opt in which is even more annoying. Edit: you could write your own serializer to re-order the elements and then pass it on to <code>DataContractSerializer</code>.

7,165,700

Google Maps API for Android, getting SHA1 cert instead of MD5

When I try to get the MD5 fingerprint using <code>keytool</code>, I get a SHA1 fingerprint instead and the Google Maps doesn't recognize it. How do I get the MD5 fingerprint?

7,221,014

5

7

null

2011-08-23 18:19:29.93 UTC

9

2021-04-11 08:45:59.827 UTC

null

3,964,927

null

556,167

null

1

54

android|google-maps|md5|sha1|fingerprint

47,718

Use JDK version 1.6 instead of 1.7 because 1.7 generates the fingerprint with SHA1 by default. or you can use (-v) option of the keytool to give you all supported algorithms output and you will find the MD5 in it. for examble : keytool -v -list -keystore [your keystore path] and then enter the password which is [android] by default (you can get the keystore path from Eclipse window>Prefs>Android>build). Sincerely, DigitalFox

13,813,046

How is MVC supposed to work in CodeIgniter

As a mostly self-taught programmer I'm late to the game when it comes to design patterns and such. I'm writing a labor management webapp using CodeIgniter. I did a bit of MVC ASP.NET/C# and Java at school, and the convention was that your model mainly consisted of classes that represented actual objects, but also abstracted all the database connection and such...which is pretty standard MVC stuff from what I've gathered. I imagine I'm right in saying that CI abstracts the database connection completely out of sight (unless you go looking), which is par for the course, and the models you can create can abstract the 'generic' CRUD methods a bit more to create some methods that are more useful for the specific model. The thing I have a problem with, because it's different to what I'm used to with MVC, is that whenever you say...return a row from a database, the convention is to just put it in an associative array or standard object with the properties representing the data from the row. In ASP you'd have actual classes that you could construct to store this information. For example you'd have a <code>House</code> class and the data would be stored as properties (e.g. <code>bedrooms</code>, <code>bathrooms</code>, <code>address</code>) and the methods would represent useful things you could do with the data (e.g. <code>printInfo()</code> may <code>print("$address has $bedrooms bedrooms and $bathrooms bathrooms!')</code>). I'm getting the impression — just from code I've seen around the Internet — that this isn't the standard way of doing things. Are you supposed to just use arrays or generic objects, and say...do <code>$this->house_model->print_info($houseobject)</code> instead of <code>$houseobject->print_info();</code>? Thanks.

13,821,880

3

0

null

2012-12-11 03:09:42.523 UTC

13

2012-12-12 13:35:03.53 UTC

null

729,785

null

1

10

php|codeigniter|model-view-controller|web

8,353

Despite its claims to the contrary, Codeigniter does not use MVC at all (In fact, very few web frameworks do!) it actually uses a PAC (Presentation-abstraction-control) architecture. Essentially, in PAC the presentation layer is fed data by a presenter (which CodeIgniter calls a controller) and in MVC the View gets its own data from the model. The confusion exists because of this mislabeling of MVC. As such, CodeIgniter (and most of the other popular web frameworks) don't encourage a proper model but just use very rudimentary data access its place. This causes a large set of problems because of "fat controllers". None of the code which relates to the domain becomes reusable. Further reading: <ul> <li><a href="http://www.garfieldtech.com/blog/mvc-vs-pac" rel="noreferrer" title="MVC vs. PAC">MVC vs. PAC</a></li> <li><a href="http://blog.astrumfutura.com/2008/12/the-m-in-mvc-why-models-are-misunderstood-and-unappreciated/" rel="noreferrer" title="The M in MVC: Why Models are Misunderstood and Unappreciated">The M in MVC: Why Models are Misunderstood and Unappreciated</a></li> <li><a href="http://r.je/views-are-not-templates.html" rel="noreferrer" title="Model-View-Confusion: The View gets its own data from the Model">Model-View-Confusion part 1: The View gets its own data from the Model</a></li> <li><a href="http://codebetter.com/iancooper/2008/12/03/the-fat-controller/" rel="noreferrer" title="The Fat Controller">The Fat Controller</a></li> </ul> This is a widespread point of confusion in the PHP Community (The MVC vs. PAC article identifies the problem as stemming from the PHP community. that was written in 2006 and nothing has changed, if anything it's got worse because there are more frameworks and tutorials teaching an erroneous definition of MVC.) and why people looking at "MVC" PHP code who have come from a background outside web development understandably become confused. Most "MVC" implementations in PHP are not MVC. You are correct in thinking models should be properly structured, it's CodeIgniter that's wrong to label itself as MVC.

13,990,681

PHP Parse error: syntax error, unexpected end of file in a CodeIgniter View

I am getting an <code>unexpected end of file</code> error on my CodeIgniter View. I have pasted the PHP code at <a href="http://codepad.org/S12oXE4t" rel="nofollow noreferrer">http://codepad.org/S12oXE4t</a>. This code passed various online PHP syntax tests, but I don't know why still it shows me the below error while I was trying to run in WAMP Server. <pre><code>Parse error: syntax error, unexpected end of file in E:\wampserver\www\CodeIgniter\application\views\layouts\default.php on line 676 </code></pre> For reference, <code>line 676</code> is the last line in the code. What did I do wrong?

13,991,002

3

7

null

2012-12-21 12:59:12.88 UTC

5

2018-02-28 00:54:31.31 UTC

2018-02-28 00:16:41.08 UTC

null

63,550

null

1,117,987

null

1

11

php|codeigniter

120,400

Check your <a href="http://fr.php.net/manual/en/ini.core.php#ini.short-open-tag" rel="noreferrer">short_open_tag</a> setting (use <code><?php phpinfo() ?></code> to see its current setting).

13,894,345

How to position and align a matplotlib figure legend?

I have a figure with two subplots as 2 rows and 1 column. I can add a nice looking figure legend with <pre><code>fig.legend((l1, l2), ['2011', '2012'], loc="lower center", ncol=2, fancybox=True, shadow=True, prop={'size':'small'}) </code></pre> However, this legend is positioned at the center of the figure and not below the center of the axes as I would like to have it. Now, I can obtain my axes coordinates with <pre><code>axbox = ax[1].get_position() </code></pre> and in theory I should be able to position the legend by specifying the loc keyword with a tuple: <pre><code>fig.legend(..., loc=(axbox.x0+0.5*axbox.width, axbox.y0-0.08), ...) </code></pre> This works, except that the legend is left aligned so that loc specifies the left edge/corner of the legend box and not the center. I searched for keywords such as align, horizontalalignment, etc., but couldn't find any. I also tried to obtain the "legend position", but legend doesn't have a *get_position()* method. I read about *bbox_to_anchor* but cannot make sense of it when applied to a figure legend. This seems to be made for axes legends. Or: should I use a shifted axes legend instead? But then, why are there figure legends in the first place? And somehow it must be possible to "center align" a figure legend, because loc="lower center" does it too. Thanks for any help, Martin

13,962,752

2

0

null

2012-12-15 17:11:37.887 UTC

9

2020-04-04 10:12:28.037 UTC

null

1,901,376

null

1

28

python|matplotlib|legend

63,567

In this case, you can either use axes for figure <code>legend</code> methods. In either case, <code>bbox_to_anchor</code> is the key. As you've already noticed <code>bbox_to_anchor</code> specifies a tuple of coordinates (or a box) to place the legend at. When you're using <code>bbox_to_anchor</code> think of the <code>location</code> kwarg as controlling the horizontal and vertical alignment. The difference is just whether the tuple of coordinates is interpreted as axes or figure coordinates. As an example of using a figure legend: <pre><code>import numpy as np import matplotlib.pyplot as plt fig, (ax1, ax2) = plt.subplots(nrows=2, sharex=True) x = np.linspace(0, np.pi, 100) line1, = ax1.plot(x, np.cos(3*x), color='red') line2, = ax2.plot(x, np.sin(4*x), color='green') # The key to the position is bbox_to_anchor: Place it at x=0.5, y=0.5 # in figure coordinates. # "center" is basically saying center horizontal alignment and # center vertical alignment in this case fig.legend([line1, line2], ['yep', 'nope'], bbox_to_anchor=[0.5, 0.5], loc='center', ncol=2) plt.show() </code></pre> <img src="https://i.stack.imgur.com/fwCsW.png" alt="enter image description here"> As an example of using the axes method, try something like this: <pre><code>import numpy as np import matplotlib.pyplot as plt fig, (ax1, ax2) = plt.subplots(nrows=2, sharex=True) x = np.linspace(0, np.pi, 100) line1, = ax1.plot(x, np.cos(3*x), color='red') line2, = ax2.plot(x, np.sin(4*x), color='green') # The key to the position is bbox_to_anchor: Place it at x=0.5, y=0 # in axes coordinates. # "upper center" is basically saying center horizontal alignment and # top vertical alignment in this case ax1.legend([line1, line2], ['yep', 'nope'], bbox_to_anchor=[0.5, 0], loc='upper center', ncol=2, borderaxespad=0.25) plt.show() </code></pre> <img src="https://i.stack.imgur.com/hekWn.png" alt="enter image description here">

14,245,227

Python - reset stdout to normal, after previously redirecting it to a file

At the beginning of my python program I have the following line: <pre><code>sys.stdout = open('stdout_file', 'w') </code></pre> Halfway through my program I would like to set stdout back to the normal stdout. How do I do this?

14,245,252

4

1

null

2013-01-09 19:47:04.283 UTC

9

2020-05-29 19:11:06.813 UTC

null

1,701,170

null

1

28

python|stdout

18,915

The original <code>stdout</code> can be accessed as <code>sys.__stdout__</code>. This <a href="http://docs.python.org/2/library/sys.html#sys.__stdin__">is documented</a>.

14,343,893

How do I reset my database state after each unit test without making the whole test a transaction?

I'm using Spring 3.1.1.RELEASE, Hibernate 4.1.0.Final, JPA 2, JUnit 4.8.1, and HSQL 2.2.7. I want to run some JUnit tests on my service methods, and after each test, I would like any data written to the in-memory database to be rolled back. However, I do NOT want the entire test to be treated as a transaction. For example in this test <pre><code>@RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration({ "classpath:test-context.xml" }) public class ContractServiceTest { … @Autowired private ContractService m_contractService; @Test public void testUpdateContract() { // Add the contract m_contractService.save(m_contract); Assert.assertNotNull(m_contract.getId()); // Update the activation date by 6 months. final Calendar activationDate = Calendar.getInstance(); activationDate.setTime(activationDate.getTime()); activationDate.add(Calendar.MONTH, 6); m_contract.setActivationDate(activationDate.getTime()); m_contractService.save(m_contract); final List<Contract> foundContracts = m_contractService.findContractByOppId(m_contract.getOpportunityId()); Assert.assertEquals(foundContracts.get(0), m_contract); } // testUpdateContract </code></pre> there are three calls to the service, ("m_contractService.save", "m_contractService.save", and "m_contractService.findContractByOppId") and each is treated as a transaction, which I want. But I don't know how to reset my in-memory database to its original state after each unit test. Let me know if I need to provide additional information.

14,349,589

7

3

null

2013-01-15 18:00:51.29 UTC

3

2021-08-03 09:47:03.673 UTC

null

1,235,929

null

1

39

spring|junit|transactions|hsqldb

51,226

Since you are using Hibernate, you could use the property <code>hibernate.hbm2ddl.auto</code> to create the database on startup every time. You would also need to force the spring context to be reloaded after each test. You can do this with the <code>@DirtiesContext</code> annotation. This might add a bit extra overhead to your tests, so the other solution is to just manually delete the data from each table.

43,352,501

CSS grid: content to use free space but scroll when bigger

I've been working with <a href="https://www.w3.org/TR/css3-grid-layout/" rel="noreferrer">CSS Grid Layouts</a> for the first time and they're awesome. Right now, however, I'm having trouble keeping one of my grid cells under control. What I want is to have an element that takes up the existing free space and no more, scrolling when the content gets too big. My understanding is that a grid size of <code>1fr</code> takes up a uniform amount of the available space after everything else is calculated. I've tried various sizes such as <code>minmax(auto, 1fr)</code> but to no avail - <code>1fr</code> seems to expand to fit the content which is not what I want. Setting a maximum size size like <code>100px</code> is also no good because I want the size to be determined by other elements in the grid. Here's the example: <div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false"> <div class="snippet-code"> <pre class="snippet-code-css lang-css prettyprint-override"><code>.container { display: grid; grid-template-rows: auto 1fr auto; grid-template-columns: 1fr 1fr; } .container>div { border: 1px solid blue; border-radius: 5px; } .left { grid-column: 1; grid-row: 1/4; } .header { grid-column: 2; grid-row: 1; } .problem-child { grid-column: 2; grid-row: 2; overflow-y: scroll; } .footer { grid-column: 2; grid-row: 3; }</code></pre> <pre class="snippet-code-html lang-html prettyprint-override"><code><div class="container"> <div class="left">left I don't want this one to scroll this should determine the height of the whole grid container</div> <div class="header">column header</div> <div class="problem-child">problem child: I want this to scroll rather than making everything tall</div> <div class="footer">column footer</div> </div></code></pre> </div> </div> What grid declaration (if any) can I use to let the "problem child" scroll on overflow rather than expanding?

43,352,777

4

1

null

2017-04-11 17:23:27.06 UTC

10

2019-05-07 12:05:06.243 UTC

2017-04-11 17:37:33.053 UTC

null

1,701,416

null

1,701,416

null

1

26

css|styling|grid-layout|css-grid

30,170

You can use <code>max-height:100%;</code> and also <code>min-height</code> to leave enough heights to show a proper scrollbar.(firefox will do, chrome will not at this time) <div class="snippet" data-lang="js" data-hide="true" data-console="true" data-babel="false"> <div class="snippet-code snippet-currently-hidden"> <pre class="snippet-code-css lang-css prettyprint-override"><code>.container { display: grid; grid-template-rows: auto minmax(1fr, 25vh) auto; grid-template-columns: 1fr 1fr; } .container>div { border: 1px solid blue; border-radius: 5px; } .left { grid-column: 1; grid-row: 1/4; } .header { grid-column: 2; grid-row: 1; } .problem-child { grid-column: 2; grid-row: 2; min-height:4em; max-height:100%; overflow-y: auto; } .footer { grid-column: 2; grid-row: 3; }</code></pre> <pre class="snippet-code-html lang-html prettyprint-override"><code><div class="container"> <div class="left">left I don't want this one to scroll this should determine the height of the whole grid container</div> <div class="header">column header</div> <div class="problem-child">problem child: I want this to scroll rather than making everything tall</div> <div class="footer">column footer</div> </div></code></pre> </div> </div> <hr> As a work around, you can also use an extra wrapper in <code>absolute</code> position to take it off the flow and size it to the row's height: (both cases require a min-height to show properly the scrollbar when needed) <div class="snippet" data-lang="js" data-hide="true" data-console="true" data-babel="false"> <div class="snippet-code snippet-currently-hidden"> <pre class="snippet-code-css lang-css prettyprint-override"><code>.container { display: grid; grid-template-rows: auto 1fr auto; grid-template-columns: 1fr 1fr; } .container>div { border: 1px solid blue; border-radius: 5px; } .left { grid-column: 1; grid-row: 1/4; } .header { grid-column: 2; grid-row: 1; } .problem-child { grid-column: 2; grid-row: 2; position:relative; min-height:4em; } .problem-child >div { position:absolute; top:0; left:0; right:0; max-height:100%; overflow:auto ; } .footer { grid-column: 2; grid-row: 3; }</code></pre> <pre class="snippet-code-html lang-html prettyprint-override"><code><div class="container"> <div class="left">left I don't want this one to scroll this should determine the height of the whole grid container</div> <div class="header">column header</div> <div class="problem-child"> <div>problem child: I want this to scroll rather than making everything tall</div> </div> <div class="footer">column footer</div> </div></code></pre> </div> </div>

9,404,683

How to get the length of row/column of multidimensional array in C#?

How do I get the length of a row or column of a multidimensional array in C#? for example: <pre><code>int[,] matrix = new int[2,3]; matrix.rowLength = 2; matrix.colLength = 3; </code></pre>

9,404,722

5

1

null

2012-02-22 23:08:15.487 UTC

13

2022-09-03 19:15:23.327 UTC

2019-08-13 19:45:09.88 UTC

null

2,543,778

null

1,036,286

null

1

86

c#|arrays|multidimensional-array

112,169

<pre><code>matrix.GetLength(0) -> Gets the first dimension size matrix.GetLength(1) -> Gets the second dimension size </code></pre>

62,707,558

ImportError: cannot import name 'adam' from 'keras.optimizers'

I am trying to import Keras but I get the following error: <pre><code>ImportError: cannot import name 'adam' from 'keras.optimizers' (/usr/local/lib/python3.8/dist-packages/keras/optimizers/__init__.py) </code></pre> The import is invoked here: <pre><code>from tensorflow import keras from keras.layers import Conv2D, Input, MaxPool2D,Flatten, Dense, Permute, GlobalAveragePooling2D from keras.models import Model from keras.optimizers import adam import numpy as np import pickle import keras import cv2 import sys import dlib import os.path from keras.models import Sequential from keras.applications.resnet50 import ResNet50 from keras.applications.resnet50 import Dense from keras.optimizers import Adam import pickle import numpy as np import cv2 import os from keras.layers import Dropout </code></pre> I am sure Keras is installed along with Tensorflow: <pre><code>python3 -c 'import keras; print(keras.__version__)' // 2.4.3 </code></pre>

68,418,955

9

1

null

2020-07-03 02:19:46.993 UTC

10

2022-09-16 21:28:31.19 UTC

null

11,356,638

null

1

62

keras

174,080

There are two types of modules - <ol> <li>keras</li> <li>tensorflow.keras</li> </ol> Here we need to use tensorflow.keras You need to import Adam (With Capital A) from tensorflow - Keras ( Not only Keras). <pre><code>from tensorflow.keras.optimizers import Adam from tensorflow.keras.optimizers import Adam # - Works from tensorflow.keras.optimizers import adam # - Does not work from keras.optimizers import Adam # - Does not work from keras.optimizers import adam # - Does not work </code></pre>

49,513,356

Error running 'app': Unknown error in Android studio 3.1

I have updated my android studio to new stable version 3.1. After build project not able to run. Let me know if anyone have face same issue or find any solution. <a href="https://i.stack.imgur.com/QDqd5.png" rel="noreferrer"><img src="https://i.stack.imgur.com/QDqd5.png" alt="My event log show this error"></a>

49,521,030

6

10

null

2018-03-27 12:51:18.103 UTC

6

2020-07-18 20:02:58.643 UTC

2018-03-30 14:09:37.163 UTC

null

1,000,551

null

2,553,048

null

1

32

android|android-studio|android-studio-3.1

11,379

Just go to "Run/edit configurations.../" and scroll down to bottom of the window and here you see an option "Before launch..." First, remove whatever already inside the little window and then click on (+) icon and select "Gradle-aware Make" and then type "assembleDebug" and select the first option or that you need. This will solve your problem.

66,670,334

Mono.Linker.MarkException: Error processing method: 'System.Void AndroidX.RecyclerView.Widget.RecyclerView/LayoutManager

I am trying to debug my Xamarin project. Framework and all packages are up to date. In iOS it works, but in Android NOT. How can I solve this problem: <pre><code>Mono.Linker.MarkException: Error processing method: 'System.Void AndroidX.RecyclerView.Widget.RecyclerView/LayoutManager::n_OnInitializeAccessibilityNodeInfo_Landroidx_recyclerview_widget_RecyclerView_Recycler_Landroidx_recyclerview_widget_RecyclerView_State_Landroidx_core_view_accessibility_AccessibilityNodeInfoCompat_(System.IntPtr,System.IntPtr,System.IntPtr,System.IntPtr,System.IntPtr)' in assembly: 'Xamarin.AndroidX.RecyclerView.dll' ---> Mono.Cecil.ResolutionException: Failed to resolve AndroidX.Core.View.Accessibiity.AccessibilityNodeInfoCompat at Mono.Linker.Steps.MarkStep.HandleUnresolvedType(TypeReference reference) at Mono.Linker.Steps.MarkStep.MarkType(TypeReference reference) at MonoDroid.Tuner.MonoDroidMarkStep.MarkType(TypeReference reference) at Mono.Linker.Steps.MarkStep.MarkMethodBody(MethodBody body) at Mono.Linker.Steps.MarkStep.ProcessMethod(MethodDefinition method) at Mono.Linker.Steps.MarkStep.ProcessQueue() --- End of inner exception stack trace --- at Mono.Linker.Steps.MarkStep.ProcessQueue() at Mono.Linker.Steps.MarkStep.ProcessPrimaryQueue() at Mono.Linker.Steps.MarkStep.Process() at Mono.Linker.Steps.MarkStep.Process(LinkContext context) at MonoDroid.Tuner.MonoDroidMarkStep.Process(LinkContext context) at Mono.Linker.Pipeline.ProcessStep(LinkContext context, IStep step) at Mono.Linker.Pipeline.Process(LinkContext context) at MonoDroid.Tuner.Linker.Process(LinkerOptions options, ILogger logger, LinkContext& context) at Xamarin.Android.Tasks.LinkAssemblies.Execute(DirectoryAssemblyResolver res) at Xamarin.Android.Tasks.LinkAssemblies.RunTask() at Xamarin.Android.Tasks.AndroidTask.Execute() </code></pre>

66,689,618

9

1

null

2021-03-17 09:31:57.687 UTC

1

2022-08-29 01:54:55.1 UTC

null

13,790,813

null

1

35

android|xamarin|android-recyclerview|xamarin.android|mono

9,632

I encountered this same problem after updating Visual Studio to 16.9.2 and updating the Android SDK. The simple solution was to update the 'Xamarin.AndroidX.RecyclerView' Nuget package in the package manager. I Updated to the latest version (v1.1.0.8).

44,487,492

Laravel 5.4 blade foreach loop

I am building a venue manangement system, and on the landing page, i m trying to show all the available slots to the visitors. The ones that have already been booked are shown as not available. I have created two variables, one that carries the info from the time table and the other from the booking table and tyring to use blade to compare and show. This is how I am trying to implement it in blade: <pre><code>@foreach($times as $time) @foreach($bookings as $booking) <tr> @if($time->availble_times == $booking->booking_time) <td>{{$time->availble_times}}: not available</td> @else <tr><td>{{$time->availble_times}}</td> @endif </tr> @endforeach @endforeach </code></pre> But what this does instead is show all the times for as many records in the bookings table. Like if there are two rows in the bookings table, it shows the times twice, and so on. Just in case, here is my controller function: <pre><code> public function times(){ $times = Times::all(); $bookings = Bookings::all(); return view('/test2')->with('times', $times)->with('bookings', $bookings); } </code></pre> I recently started doing Laravel and cannot figure out this issue. My question is, how can i fix the n-times display issue and show the user which times are booked and which are available?

44,488,450

1

3

null

2017-06-11 18:48:40.66 UTC

1

2017-06-11 20:27:49.79 UTC

2017-06-11 19:05:25.877 UTC

null

7,437,058

null

5,354,413

null

1

10

php|laravel-5|laravel-5.4|laravel-blade

65,152

I don't know how your data looks, but by looking at your code columns <code>availble_times</code> and <code>booking_time</code> are date fields. If Times model is dictionary for hours (like 1. 8.00, 2. 8:45, 3. 9:00) , and booking hour has to be in Times records, then you just need to invert the loops to display each time for each booking <pre><code>@foreach($bookings as $booking) @foreach($times as $time) <tr> <td>{{ getImaginedChairNumber() }}</td> <td>{{ $time->availble_times }}</td> @if($time->availble_times == $booking->booking_time) {{-- There is already booking for that dictionary time --}} <td>not available</td> @else <td>available</td> @endif </tr> @endforeach @endforeach </code></pre> Should produce similar table: <pre><code>╔═══════╦══════╦═══════════════╗ ║ Chair ║ Time ║ Booking ║ ╠═══════╬══════╬═══════════════╣ ║ A1 ║ 8:00 ║ not available ║ ║ A1 ║ 8:45 ║ available ║ ║ A1 ║ 9:00 ║ not available ║ ║ A2 ║ 8:00 ║ not available ║ ║ A2 ║ 8:45 ║ not available ║ ║ A2 ║ 9:00 ║ not available ║ ║ A3 ║ 8:00 ║ available ║ ║ A3 ║ 8:45 ║ available ║ ║ A3 ║ 9:00 ║ not available ║ ╚═══════╩══════╩═══════════════╝ </code></pre> Is this the correct form of the output table you expect? (I used this tool to draw ascii table <a href="https://senseful.github.io/web-tools/text-table/" rel="noreferrer">https://senseful.github.io/web-tools/text-table/</a>)

52,235,847

How do I push items into an array in the data object in Vuejs? Vue seems not to be watching the .push() method

I am attempting to add objects into an array I declared in Vue instance data object. I can set the values in the state's purchase object, but when I push data into the orders queue array, the empty array is not populated. The function is being triggered, but the array does not update. Here is my form: <pre><code><form v-on:submit.prevent="queuePurchase" class="form-inline row" id="order-creation-form" method="POST" > @csrf <autocomplete-field sizing="col-xs-12 col-sm-3 col-md-3" name="customer" label="Customer" :data="{{ json_encode($customers) }}" v-on:setcustomer="setCustomer($event)" ></autocomplete-field> <div class="col-xs-12 col-sm-3 col-md3 form-group d-flex flex-column align-items-start"> <label for="phone">Product</label> <select v-model="purchase.product" class="form-control w-100" name="product" aria-describedby="productHelpBlock" required > @foreach ($products as $product) <option :value="{{ json_encode($product) }}"> {{ $product->name }} </option> @endforeach </select> Select a product </div> <div class="col-xs-12 col-sm-3 col-md-3 form-group d-flex flex-column align-items-start"> <label for="phone">Quantity</label> <input v-model="purchase.quantity" type="number" min="1" name="product" class="form-control w-100" aria-describedby="productHelpBlock" required > Product quantity </div> <div class="form-group"> <button type="submit" class="btn btn-success icon-button d-flex"> add &nbsp;&nbsp; Q U E U E </button> </div> </form> </code></pre> And here is my javascript: <pre><code>require("./bootstrap"); window.Vue = require("vue"); Vue.component("queue-table", require('./components/QueueTable.vue')); Vue.component("autocomplete-field", require('./components/AutocompleteField.vue')); const purchaseApp = new Vue({ el: "#purchase-app", data() { return { queue: [], purchase: { product: null, customer: null, quantity: null } } }, methods: { setCustomer: function(customerObj) { this.purchase.customer = customerObj; }, queuePurchase: function() { this.queue.push( this.purchase ); } } }); </code></pre> Could someone please explain what & why it is happening?

52,239,532

1

5

null

2018-09-08 13:33:44.997 UTC

4

2018-09-08 21:52:54.487 UTC

null

3,367,343

user4998157

null

1

13

javascript|laravel-5|vue.js|vuejs2|vue-reactivity

78,765

The <code>push()</code> method ought to add <code>purchase</code> objects to the <code>queue</code> array, but as @FK82 pointed out in his comment, <code>push()</code> is adding multiple references to the same <code>purchase</code> object. This means that if you change the object by increasing the <code>quantity</code>, every <code>purchase</code>'s <code>quantity</code> property will be updated. You can give that a try here: <div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false"> <div class="snippet-code"> <pre class="snippet-code-js lang-js prettyprint-override"><code>const exampleComponent = Vue.component("example-component", { name: "exampleComponent", template: "#example-component", data() { return { queue: [], purchase: { product: null, customer: null, quantity: null } }; }, methods: { queuePurchase() { this.queue.push( this.purchase ); } } }); const page = new Vue({ name: "page", el: ".page", components: { "example-component": exampleComponent } });</code></pre> <pre class="snippet-code-html lang-html prettyprint-override"><code><script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.2.4/vue.min.js"></script> <template id="example-component"> <div> The Queue has {{ this.queue.length }} items. <input v-model="purchase.quantity" type="number" min="1" name="product" placeholder="Quantity" > <button @click="queuePurchase"> Add to Queue </button> <pre>{{ JSON.stringify(this.queue, null, 2) }}</pre> </div> </template> <div class="page"> <example-component></example-component> </div></code></pre> </div> </div> Instead of <code>push()</code>ing a reference to the same <code>purchase</code> object, try creating a shallow copy with <code>Object.assign({}, this.purchase)</code> or by using the spread operator. Here's an example that uses the spread operator and then <code>push()</code>es the copy onto the <code>queue</code>: <div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false"> <div class="snippet-code"> <pre class="snippet-code-js lang-js prettyprint-override"><code>const exampleComponent = Vue.component("example-component", { name: "exampleComponent", template: "#example-component", data() { return { queue: [], purchase: { product: null, customer: null, quantity: null } }; }, methods: { queuePurchase() { this.queue.push({...this.purchase}); } } }); const page = new Vue({ name: "page", el: ".page", components: { "example-component": exampleComponent } });</code></pre> <pre class="snippet-code-html lang-html prettyprint-override"><code><script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.2.4/vue.min.js"></script> <template id="example-component"> <div> The Queue has {{ this.queue.length }} items. <input v-model="purchase.quantity" type="number" min="1" name="product" placeholder="Quantity" > <button @click="queuePurchase"> Add to Queue </button> <pre>{{ JSON.stringify(this.queue, null, 2) }}</pre> </div> </template> <div class="page"> <example-component></example-component> </div></code></pre> </div> </div>

1,312,825

Web Service vs. Shared Library

This question has been asked a few times on SO from what I found: <a href="https://stackoverflow.com/questions/204653/when-should-a-web-service-not-be-used">When should a web service not be used?</a> <a href="https://stackoverflow.com/questions/299260/web-service-or-dll">Web Service or DLL?</a> The answers helped but they were both a little pointed to a particular scenario. I wanted to get a more general thought on this. When should a Web Service be considered over a Shared Library (DLL) and vice versa?

1,312,836

5

2

null

2009-08-21 15:57:37.667 UTC

9

2019-05-16 22:20:02.127 UTC

2017-05-23 12:01:22.063 UTC

null

-1

null

149,053

null

1

16

web-services

9,647

My thought on this: A Web Service was designed for machine interop and to reach an audience easily by using HTTP as the means of transport. A strong point is that by publishing the service you are also opening the use of the service to an audience that is potentially vast (over the web or at least throughout the entire company) and/or largely outside of your control / influence / communication channel and you don't mind or this is desired. The usage of the service is much easier as clients simply have to have an internet connection and consume the service. Unlike a library which may not be so easily done (but can be done). The usage of the service is largely open. You are making it available to whomever feels they could use it and however they feel to use it. However, a web service is in general slower and is dependent on an internet connection. It's in general harder to test than a code library. It may be harder to maintain. Much of that depends on your maintainance and coding practices. I would consider a web service if several of the above features are desired or at least one of them is considered paramount and the downsides were acceptable or a necessary evil. What about a Shared Library? What if you are far more in "control" of your environment or want to be? You know who will be using the code (interface isn't a problem to maintain), you don't have to worry about interop. You are in a situation where you can easily achieve sharing without a lot of work / hoops to jump through. Examples in my mind of when to use: You have many applications in your control all hosted on the same server or two that will use the library. Not so good example, you have many applications but all hosted on a dozen or so servers. Web Service may be a better choice. You are not sure who or how your code could be used but know it is of good value to many. Web Service. You are writing something only used by a limited set of applications, perhaps some helper functions. Library. You are writing something highly specialized and is not suited for consumption by many. Such as an API for your Line of Business Application that no one else will ever use. Library. If all things being equal, it would be easier to start with a shared library and turn it into a web service but not so much vice versa. There are many more but these are some of my thoughts on it...

1,242,766

Uses of 'for' in Java

I am fairly new to Java and in another Stack Overflow question about <a href="https://stackoverflow.com/questions/1241946/how-is-a-for-loop-structured-in-java">for loops</a> an answer said that there was two uses of for in Java: <pre><code>for (int i = 0; i < N; i++) { } for (String a : anyIterable) { } </code></pre> I know the first use of for and have used it a lot, but I have never seen the second one. What is it used to do and when would I use it?

1,242,771

5

0

null

2009-08-07 03:38:12.627 UTC

8

2017-07-01 08:14:09.173 UTC

2017-05-23 11:46:25.623 UTC

null

-1

null

99,135

null

1

26

java|loops|for-loop

81,255

The first of the two you specify is a classic C <code>for</code> loop. This gives the programmer control over the iteration criteria and allows for three operations: the initialization; the loop test ; the increment expression. Though it is used often to incrementally repeat for a set number of attempts, as in yor example: <pre><code>for (int i=0; i < N : i++) </code></pre> There are many more instances in code where the <code>for</code> was use to iterate over collections: <pre><code>for (Iterator iter = myList.iterator(); iter.hasNext();) </code></pre> To aleviate the boilerplating of the second type (where the third clause was often unused), and to compliment the <a href="http://java.sun.com/j2se/1.5/pdf/generics-tutorial.pdf" rel="noreferrer">Generics</a> introduced in Java 1.5, the second of your two examples - the enhanced for loop, or the <a href="http://java.sun.com/j2se/1.5.0/docs/guide/language/foreach.html" rel="noreferrer"><code>for-each loop</code></a> - was introduced. The second is used with arrays and Generic collections. <a href="http://java.sun.com/developer/JDCTechTips/2005/tt0505.html#2" rel="noreferrer">See this documentation</a>. It allows you to iterate over a generic collection, where you know the type of the <code>Collection</code>, without having to cast the result of the <code>Iterator.next()</code> to a known type. Compare: <pre><code>for(Iterator iter = myList.iterator; iter.hasNext() ; ) { String myStr = (String) iter.next(); //...do something with myStr } </code></pre> with <pre><code>for (String myStr : myList) { //...do something with myStr } </code></pre> This 'new style' for loop can be used with arrays as well: <pre><code>String[] strArray= ... for (String myStr : strArray) { //...do something with myStr } </code></pre>

567,879

How can I process command line arguments in Python?

What would be an easy expression to process command line arguments if I'm expecting anything like 001 or 999 (let's limit expectations to 001...999 range for this time), and few other arguments passed, and would like to ignore any unexpected? I understand if for example I need to find out if "debug" was passed among parameters it'll be something like that: <pre><code>if 'debug' in argv[1:]: print 'Will be running in debug mode.' </code></pre> How to find out if 009 or 575 was passed? All those are expected calls: <pre><code>python script.py python script.py 011 python script.py 256 debug python script.py 391 xls python script.py 999 debug pdf </code></pre> At this point I don't care about calls like that: <pre><code>python script.py 001 002 245 568 python script.py some unexpected argument python script.py 0001 python script.py 02 </code></pre> ...first one - because of more than one "numeric" argument; second - because of... well, unexpected arguments; third and fourth - because of non-3-digits arguments.

567,923

5

1

null

2009-02-20 00:41:02.203 UTC

11

2010-04-24 17:26:05.173 UTC

Barry Wark

56,285

null

63,503

null

1

30

python|command-line|command-line-arguments

55,851

As others answered, optparse is the best option, but if you just want quick code try something like this: <pre><code>import sys, re first_re = re.compile(r'^\d{3}$') if len(sys.argv) > 1: if first_re.match(sys.argv[1]): print "Primary argument is : ", sys.argv[1] else: raise ValueError("First argument should be ...") args = sys.argv[2:] else: args = () # ... anywhere in code ... if 'debug' in args: print 'debug flag' if 'xls' in args: print 'xls flag' </code></pre> EDIT: Here's an optparse example because so many people are answering optparse without really explaining why, or explaining what you have to change to make it work. The primary reason to use optparse is it gives you more flexibility for expansion later, and gives you more flexibility on the command line. In other words, your options can appear in any order and usage messages are generated automatically. However to make it work with optparse you need to change your specifications to put '-' or '--' in front of the optional arguments and you need to allow all the arguments to be in any order. So here's an example using optparse: <pre><code>import sys, re, optparse first_re = re.compile(r'^\d{3}$') parser = optparse.OptionParser() parser.set_defaults(debug=False,xls=False) parser.add_option('--debug', action='store_true', dest='debug') parser.add_option('--xls', action='store_true', dest='xls') (options, args) = parser.parse_args() if len(args) == 1: if first_re.match(args[0]): print "Primary argument is : ", args[0] else: raise ValueError("First argument should be ...") elif len(args) > 1: raise ValueError("Too many command line arguments") if options.debug: print 'debug flag' if options.xls: print 'xls flag' </code></pre> The differences here with optparse and your spec is that now you can have command lines like: <pre><code>python script.py --debug --xls 001 </code></pre> and you can easily add new options by calling parser.add_option()

594,019

How do I access query string parameters in asp.net mvc?

I want to have different sorting and filtering applied on my view I figured that I'll be passing sorting and filtering params through query string: <pre><code>@Html.ActionLink("Name", "Index", new { SortBy= "Name"}) </code></pre> This simple construction allows me to sort. View comes back with this in query string: <pre><code>?SortBy=Name </code></pre> Now I want to add filtering and i want my query string to end up with <pre><code>?SortBy=Name&Filter=Something </code></pre> How can I add another parameter to list of already existing ones in <code>ActionLink</code>? for Example: <pre><code>user requests /Index/ </code></pre> view has <pre><code> @Html.ActionLink("Name", "Index", new { SortBy= "Name"}) </code></pre> and <pre><code> @Html.ActionLink("Name", "Index", new { FilterBy= "Name"}) </code></pre> Links: The first one looks like <code>/Index/?SortBy=Name</code> and The second is <code>/Index/?FilterBy=Name</code> I want when user pressed sorting link after he applied some filtering - filtering is not lost, so i need a way to combine my params. My guess is there should be a way to not parse query string, but get collection of parameters from some MVC object.

594,501

5

2

null

2009-02-27 08:53:09.093 UTC

17

2016-12-09 20:29:38.657 UTC

Alexander Taran

35,954

Alexander Taran

35,954

null

1

39

asp.net-mvc|query-string

67,463

so far the best way I figured out is to create a copy of <code>ViewContext.RouteData.Values</code> and inject QueryString values into it. and then modify it before every <code>ActionLink</code> usage. still trying to figure out how to use <code>.Union()</code> instead of modifying a dictionary all the time. <pre><code><% RouteValueDictionary tRVD = new RouteValueDictionary(ViewContext.RouteData.Values); %> <% foreach (string key in Request.QueryString.Keys ) { tRVD[key]=Request.QueryString[key].ToString(); } %> <%tRVD["SortBy"] = "Name"; %> <%= Html.ActionLink("Name", "Index", tRVD)%> </code></pre>

13,241,738

Browser is showing PHP code instead of processing it

<blockquote> Possible Duplicate: <a href="https://stackoverflow.com/questions/5121495/php-code-is-not-being-executed-i-can-see-it-on-source-code-of-page">PHP code is not being executed (i can see it on source code of page)</a> <a href="https://stackoverflow.com/questions/6932913/web-browser-not-processing-php-code-as-php-code">web browser not processing PHP code as PHP code</a> </blockquote> I have installed XAMPP on my computer which is Windows 8 pro. I use to work with Windows 7 every time I run the <code>index.php</code> file on Windows 8 it shows the code on the browser IE10. Here is what I have done: <ol> <li>I have named the file correctly: <code>index.php</code></li> <li>I have installed the server and saved the files inside <code>c:/xampp/htdocs/PHP/</code></li> <li>I have used <code><?php ?></code> to open and close all PHP tags and everything else seems working fine, like, PHPMyAdmin, and the php.ini file </li> </ol> I don't know whats wrong and it is driving me crazy ... Farris

13,241,849

1

7

null

2012-11-05 22:57:02.927 UTC

0

2012-11-05 23:06:58.153 UTC

2017-05-23 12:25:36.507 UTC

null

-1

null

1,131,888

null

1

5

php|xampp

50,511

The problem is you're not parsing the file via the web server, but accessing it directly. you need to use the url: <pre><code>http://localhost/index.php </code></pre> or maybe (based on your path above) its <pre><code>http://localhost/PHP/index.php </code></pre> in the browser

44,124,537

Set cache to files in Firebase Storage

I have a <a href="https://discipulado-7b14b.firebaseapp.com/" rel="noreferrer">PWA</a> running on Firebase. My image files are hosted on the Firebase Storage. I've noticed my browser doesn't save cache for files loaded from the storage system. The browser requests the files for every page refresh. It causes unnecessary delay and traffic. <a href="https://i.stack.imgur.com/bDKBX.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/bDKBX.jpg" alt="Network stats"></a> My JS script loads the files from the Firebase Storage's download link, example: <a href="https://firebasestorage.googleapis.com/v0/b/discipulado-7b14b.appspot.com/o/book3.png?alt=media&token=65b2cde7-c8a4-45da-a743-401759663c17" rel="noreferrer">https://firebasestorage.googleapis.com/v0/b/discipulado-7b14b.appspot.com/o/book3.png?alt=media&token=65b2cde7-c8a4-45da-a743-401759663c17</a>. Can I cache those requests? UPDATE According to these <a href="https://stackoverflow.com/a/38121038/2684718">answer</a> I shouldn't use Firebase Storage to host files from my site. Just to manage downloads and uploads from users. Is this correct?

44,124,704

6

2

null

2017-05-23 01:49:17.043 UTC

2

2021-05-01 14:11:01.837 UTC

2017-05-23 02:03:32.467 UTC

null

2,684,718

null

2,684,718

null

1

31

javascript|json|caching|firebase|firebase-storage

17,795

<code>cacheControl</code> for Storage : <a href="https://firebase.google.com/docs/reference/js/firebase.storage.SettableMetadata#cacheControl" rel="noreferrer">https://firebase.google.com/docs/reference/js/firebase.storage.SettableMetadata#cacheControl</a> <hr> You'll have better serving with Hosting, and deployment with the firebase CLI is extremely simple. I think by default the Cache-Control on images in Hosting is 2 hours, and you can increase it globally with the .json. <a href="https://firebase.google.com/docs/hosting/full-config#headers" rel="noreferrer">https://firebase.google.com/docs/hosting/full-config#headers</a> Hosting can scale your site and move it to different edge nodes closer to where the demand is. Storage is limited to buckets, but you can specify a bucket for Europe, one for China, on for North America, etc.. Storage is better for user file uploads and Hosting was for static content (although they are rolling out dynamic Hosting with cloud functions I think)