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clojurians | clojure | <@Lisette> this repo works <https://github.com/noisesmith/clj-jsvc-adapter/blob/master/src/java/org/noisesmith/Cljsvc.java> | 2017-11-03T15:37:00.000212 | Margaret |
clojurians | clojure | <@Floretta> you don’t have to ask to ask, and there’s a <#C053AK3F9|beginners> channel you can use at your discretion | 2017-11-03T15:37:23.000570 | Margaret |
clojurians | clojure | coo. thanks | 2017-11-03T15:37:59.000513 | Floretta |
clojurians | clojure | <@Margaret> Hmm. Apparently, Eclipse simply tells me clojure.java.api.Clojure doesn't exist when I'm pulling 1.8.0 (and it results in spurious error indicators everywhere), but it actually works fine. I don't have that problem when I pull 1.7.0. | 2017-11-03T15:39:02.000250 | Lisette |
clojurians | clojure | But if I ask in the #beginner room then won't it just be all beginner there and no one to help me? :stuck_out_tongue: | 2017-11-03T15:39:08.000144 | Floretta |
clojurians | clojure | <@Lisette> well that’s weird | 2017-11-03T15:39:23.000145 | Margaret |
clojurians | clojure | <@Floretta> Oh no, there’s lots of folks that go there looking for people to help | 2017-11-03T15:40:07.000093 | Marx |
clojurians | clojure | <@Margaret> Actually - I stand corrected. The error indicators disappeared - seems I rebuilt/ran too fast. Cleaning my .m2 org/clojure stuff may have been the solution. Thanks. | 2017-11-03T15:40:11.000199 | Lisette |
clojurians | clojure | :thumbsup: | 2017-11-03T15:42:01.000012 | Margaret |
clojurians | clojure | they vary widely in quality and generality though which is why it’s not as obvious as you may think on what to add | 2017-11-03T16:28:58.000097 | Sonny |
clojurians | clojure | Does anyone know if there is a website / post that outlines some of the main Clojure libraries (e.g. Ring, Compojure, Yada, http-kit, Aleph, etc), what each one does and how they similar / differ to each other, which are currently preferred, etc.? | 2017-11-03T16:35:07.000484 | Senaida |
clojurians | clojure | if it doesn't exist it would be an interesting project | 2017-11-03T16:37:23.000331 | Herlinda |
clojurians | clojure | Agreed | 2017-11-03T16:37:33.000053 | Senaida |
clojurians | clojure | I know JUXT have the Clojure Radar | 2017-11-03T16:38:13.000365 | Senaida |
clojurians | clojure | I tried to write something similar except it took into account the participation in the community of the library author. I got stuck on the calculating library author scores | 2017-11-03T16:39:01.000243 | Herlinda |
clojurians | clojure | <https://juxt.pro/radar.html> | 2017-11-03T16:39:20.000253 | Senaida |
clojurians | clojure | Actually, that looks like a good overview | 2017-11-03T16:39:54.000155 | Senaida |
clojurians | clojure | <https://www.clojure-toolbox.com/> | 2017-11-03T16:39:57.000330 | Jonas |
clojurians | clojure | not sure how up to date it is | 2017-11-03T16:40:03.000668 | Jonas |
clojurians | clojure | Thanks Adrian :+1: That's a pretty large list of libraries | 2017-11-03T16:40:57.000054 | Senaida |
clojurians | clojure | I thought of clojure-toolbox too, but it only categorizes, it doesn’t really compare them | 2017-11-03T16:58:44.000574 | Margaret |
clojurians | clojure | Hi, I'm experiencing a strange behaviour with cljs-http, I don't seem to be able to get the response values outside of the go block. Inside the go block everything's fine, but when I return a value outside of it, I get a `#object[cljs.core.async.impl.channels.ManyToManyChannel]`. Does anybody know what I'm doing wrong? | 2017-11-04T05:30:41.000002 | Chang |
clojurians | clojure | <@Chang> <https://clojuredocs.org/clojure.core.async/go>
> Returns a channel which will receive the result of the body when
completed | 2017-11-04T05:39:12.000010 | Terra |
clojurians | clojure | <@Terra> sigh, this means I can't make go return a normal value? If I need to put the value in an atom I'm loosing the decoupling (it's better than using callbacks, but still...) | 2017-11-04T06:41:10.000025 | Chang |
clojurians | clojure | Go is not blocking so you cannot return a normal value. If you want that just leave out the go macro. | 2017-11-04T07:10:43.000021 | Karolyn |
clojurians | clojure | Or possibly you just want to <!! The returning channel to block the outer thread. | 2017-11-04T07:11:54.000033 | Karolyn |
clojurians | clojure | Out of curiosity, does anyone know why `if-some?` isn't part of the language? I found myself writing `(if (some? some-value))` pretty often and ended up writing a macro for it: `if-some?`. Just thinking that maybe I missed something, and that there's already a better way to accomplish the same outcome. Here's how I use it: <https://github.com/pcolliander/api-test/commit/655d1347e085d5c688b8e2a38581ebfe0a2b53e9> | 2017-11-04T08:13:31.000045 | Earlene |
clojurians | clojure | You could make the same case for many predicates, like if-every?, etc. doesn't make sense to bloat the lang API or mix abstractions like that. | 2017-11-04T08:22:05.000038 | Marnie |
clojurians | clojure | It's simple enough to combine them, your macro literally just adds one hyphen and removes two parens, a net one character change, right? | 2017-11-04T08:23:59.000035 | Marnie |
clojurians | clojure | guess that's true, yeah just did it for readability | 2017-11-04T08:30:31.000012 | Earlene |
clojurians | clojure | Is the regular syntax hard to read? Adding macros often makes things harder to read because it's not always clear what the macros are doing. Always prefer the core language to writing new macros until the benefits of a macro are obvious. | 2017-11-04T08:48:36.000036 | Marnie |
clojurians | clojure | <@Karolyn> yes, I realized that. my expectation was for go to be a full continuation, I guess that's not true. | 2017-11-04T09:17:33.000089 | Chang |
clojurians | clojure | i'm in the browser, so no <!! :slightly_smiling_face: | 2017-11-04T09:19:02.000055 | Chang |
clojurians | clojure | <@Earlene> notice there's also `if-some` which is similar to `if-let`. you can also just use `if` if you can accept both `nil` and `false` | 2017-11-04T14:08:13.000076 | Terra |
clojurians | clojure | Hi guys | 2017-11-04T14:25:38.000049 | Mallory |
clojurians | clojure | why this case don't work <https://gist.github.com/aibrahim/f78e6bb6ff1e41bd35883ead380db615> ? | 2017-11-04T14:28:51.000051 | Mallory |
clojurians | clojure | Maybe it’s because the call to `eval` tries to resolve `core/one` and not `foo/one`? | 2017-11-04T14:35:59.000047 | Keva |
clojurians | clojure | <@Keva> so what do you think to make this clean in the code? | 2017-11-04T14:45:47.000027 | Mallory |
clojurians | clojure | (def numbers '(foo/one foo/two foo/three)) | 2017-11-04T14:46:13.000049 | Mallory |
clojurians | clojure | ? | 2017-11-04T14:46:13.000117 | Mallory |
clojurians | clojure | then eval? | 2017-11-04T14:46:17.000041 | Mallory |
clojurians | clojure | it’s not that common to use eval | 2017-11-04T14:51:37.000091 | Jonas |
clojurians | clojure | but when I do, i often explicitly set the ns when calling eval | 2017-11-04T14:51:57.000001 | Jonas |
clojurians | clojure | something like | 2017-11-04T14:52:01.000066 | Jonas |
clojurians | clojure | ```(binding [*ns* (the-ns 'foo)]
(eval numbers))``` | 2017-11-04T14:52:51.000024 | Jonas |
clojurians | clojure | <@Jonas> thanks but can i you try this example at your machine | 2017-11-04T14:59:26.000084 | Mallory |
clojurians | clojure | it's still not working | 2017-11-04T14:59:44.000068 | Mallory |
clojurians | clojure | that will result in an error if foo/one is not a function | 2017-11-04T14:59:52.000015 | Margaret |
clojurians | clojure | eval on a list calls it | 2017-11-04T14:59:57.000040 | Margaret |
clojurians | clojure | perhaps you want `(map (comp deref resolve) numbers)` but really hte important question is why you are even indirecting things this way | 2017-11-04T15:00:27.000169 | Margaret |
clojurians | clojure | <@Jonas> thanks man done now using yours it's my fault | 2017-11-04T15:02:17.000098 | Mallory |
clojurians | clojure | <@Margaret> bad practice, i'm still working on this | 2017-11-04T15:02:33.000085 | Mallory |
clojurians | clojure | you can use `(def numbers '(list one two three))` | 2017-11-04T15:03:02.000087 | Jonas |
clojurians | clojure | sure, that would get you the right answer, but using clojure's compiler to make your code work at runtime is like using a fork lift to carry your lunch box | 2017-11-04T15:03:43.000117 | Margaret |
clojurians | clojure | eval is a big heavy slow tool, meant for hard weird structural problems | 2017-11-04T15:04:02.000015 | Margaret |
clojurians | clojure | sometimes it’s fun to drive around a fork lift :slightly_smiling_face: | 2017-11-04T15:04:08.000012 | Jonas |
clojurians | clojure | not for getting some values from symbols | 2017-11-04T15:04:09.000063 | Margaret |
clojurians | clojure | if you want the performance penalty and code that is hard to reason about, go for it I guess | 2017-11-04T15:04:39.000084 | Margaret |
clojurians | clojure | but really at that point just use mutation, it's easier to wrap your head around and performs much better | 2017-11-04T15:05:01.000131 | Margaret |
clojurians | clojure | eval is a great way to get really hard to fix bugs | 2017-11-04T15:05:17.000124 | Margaret |
clojurians | clojure | yea, i’m not suggesting to use it for production projects | 2017-11-04T15:05:17.000136 | Jonas |
clojurians | clojure | but sometimes it’s fun to just tinker with | 2017-11-04T15:05:43.000060 | Jonas |
clojurians | clojure | and sometimes it's a very big benefit using it | 2017-11-04T15:06:00.000011 | Mallory |
clojurians | clojure | even in production | 2017-11-04T15:06:05.000030 | Mallory |
clojurians | clojure | which is? | 2017-11-04T15:06:07.000070 | Margaret |
clojurians | clojure | eval | 2017-11-04T15:06:15.000020 | Mallory |
clojurians | clojure | no, what's the benefit? | 2017-11-04T15:06:19.000093 | Margaret |
clojurians | clojure | I’ve used it for a project that is similar to the ipython notebooks | 2017-11-04T15:06:37.000035 | Jonas |
clojurians | clojure | sure - you're making a compilation and code evaluation tool, that makes sense | 2017-11-04T15:06:59.000030 | Margaret |
clojurians | clojure | yea | 2017-11-04T15:07:32.000026 | Jonas |
clojurians | clojure | <@Margaret> well, what is the best practice in my situation above , how can do this ? | 2017-11-04T15:08:00.000022 | Mallory |
clojurians | clojure | <@Margaret> list with other vars in it and maybe i have deeper like this | 2017-11-04T15:08:23.000035 | Mallory |
clojurians | clojure | ```(def one 1)
(def two 2)
(def three 3)
(def numbers [one two three])``` | 2017-11-04T15:09:27.000052 | Jonas |
clojurians | clojure | <@Mallory> if you need runtime lookup rather than compile time, you can explicitly look up the vars with resolve and dereference them | 2017-11-04T15:10:38.000017 | Margaret |
clojurians | clojure | it's cleaner to actually access the namespace as <@Jonas> shows there | 2017-11-04T15:10:51.000087 | Margaret |
clojurians | clojure | ah | 2017-11-04T15:11:02.000065 | Mallory |
clojurians | clojure | that's helpful for me | 2017-11-04T15:11:08.000088 | Mallory |
clojurians | clojure | thanks guys | 2017-11-04T15:11:15.000020 | Mallory |
clojurians | clojure | the thing about this is that when eval results in a weird and hard to reproduce behavior in clojure, it's not because your notebook is poorly designed, its because the user fed it bad code | 2017-11-04T15:11:32.000128 | Margaret |
clojurians | clojure | but what I see people trying to do (like in this example here) is use eval to glue things together, and in that case you get a weird hard to weed out runtime error that is your fault, not the user's | 2017-11-04T15:12:33.000079 | Margaret |
clojurians | clojure | agreed. using `eval` is almost never the right tool | 2017-11-04T15:12:37.000044 | Jonas |
clojurians | clojure | there’s a lot of blog articles that talk about how cool lisps are because lisps have `eval` and macros. I think that’s why you sometimes get new folks to clojure trying those things out. on the one hand, using macros or `eval` is probably not the best solution to most problems, but on the other hand it’s a fun part of the language to play with if you’ve come from other languages that don’t make features like `eval` or macros as easy | 2017-11-04T15:16:44.000030 | Jonas |
clojurians | clojure | I cannot reformat the json response (ring response) I am getting after a simple get request to my database. I would like fetch data from my database and formate the data into a map. below is the format I would like to get back from my json resonse in postman. Could someone please help format the response.? does any have an example project i Could look at?
Below is the code flow....
[ {:first-name "mike", :last-name "tall" :team "football"},
{:first-name "nick", :last-name "tall" :team "york"},
{:first-name "ball", :last-name "tall" :team "sea"}
] | 2017-11-04T17:03:13.000022 | Lisha |
clojurians | clojure | hi! I'm trying to understand how to use "component". I've created a component to handle configuration variables. This is then given to the component that manages my MongoDb connection. However, how do I get the Mongo component in that namespace that is actually calling Mongo? I mean of course I could turn that namespace into a component as well, but it a seems too much for me, since this namespace holds no state overwise (it just takes the mongo connection as parameter and returns some data). Of course one way would be to store the system map in some central namespace as a var and in such cases reach out for that.. but that is explicitly discouraged in the component documentation.. so what to do instead? | 2017-11-04T17:09:01.000014 | Lieselotte |
clojurians | clojure | the component is a value that can be passed to functions | 2017-11-04T17:09:57.000020 | Margaret |
clojurians | clojure | you don't need to store it, your app can pass the components to things that use them | 2017-11-04T17:10:16.000125 | Margaret |
clojurians | clojure | in my production app, the mongo functions are passed a component that contains the mongo connection and db, you might even want to skip the component and just pass the connection, which should be a value in the component, to the functions that use it | 2017-11-04T17:11:38.000033 | Margaret |
clojurians | clojure | does 'float-array' return an immutable?
if yes, what does NOT return an immutable
if no, how do I set elements of a float-array ? | 2017-11-04T17:13:29.000009 | Berry |
clojurians | clojure | there is no such thing as an immutable array, you can use aset | 2017-11-04T17:13:55.000029 | Margaret |
clojurians | clojure | see also amap, areduce, etc. etc. | 2017-11-04T17:14:12.000039 | Margaret |
clojurians | clojure | ```
(def x (float-array (range 1000)))
(aset x 20 0)
``` | 2017-11-04T17:14:28.000116 | Berry |
clojurians | clojure | no matching method found aset | 2017-11-04T17:14:33.000029 | Berry |
clojurians | clojure | ```+user=> (doc aset)
-------------------------
clojure.core/aset
([array idx val] [array idx idx2 & idxv])
Sets the value at the index/indices. Works on Java arrays of
reference types. Returns val.
nil
``` | 2017-11-04T17:15:12.000124 | Margaret |
clojurians | clojure | 0 isn't a float, that's the non matching method | 2017-11-04T17:15:29.000050 | Margaret |
clojurians | clojure | also why a float array instead of double array? | 2017-11-04T17:15:40.000002 | Margaret |
clojurians | clojure | hmm, 0.0 doesn't work either, I need (float 0.0) | 2017-11-04T17:15:57.000028 | Berry |
clojurians | clojure | I'm interfacing with some gpu / ndarray stuff that uses floats | 2017-11-04T17:16:07.000020 | Berry |
clojurians | clojure | right, 0.0 isn't a float, it's a double | 2017-11-04T17:16:08.000084 | Margaret |
clojurians | clojure | <@Margaret> that's OK, but how does *that* code get the component that is calling the mongoDB functions? I mean my call chain is Jetty -> Pedestal -> Some business logic namespace that is pure functions -> MongoDb namespace. Currently I have a component for Jetty, Pedestal and Mongo | 2017-11-04T17:16:57.000035 | Lieselotte |
clojurians | clojure | your handler should be using the component, your app startup can deliver the component to the handler for example | 2017-11-04T17:17:40.000051 | Margaret |
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