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clojurians | clojure | the point-in-time is the key part there | 2017-10-24T16:39:52.000433 | Rebeca |
clojurians | clojure | Yep that sounds familiar <@Fritz> | 2017-10-24T16:39:56.000179 | Shira |
clojurians | clojure | <@Rebeca> got it, thanks
<@Virgil> I just didn't want to follow through the talk and not understand this :slightly_smiling_face: I'll keep it simple this will be an introductory talk | 2017-10-24T16:40:52.000719 | Carline |
clojurians | clojure | As discussed in <https://www.youtube.com/watch?v=9N7xM40fio0&list=PLZdCLR02grLqCR8EKuil8NrffZuTl0kwL&index=32> "nobody" ever uses agents :slightly_smiling_face: | 2017-10-24T16:41:12.000231 | Virgil |
clojurians | clojure | A talk very much worth watching though. | 2017-10-24T16:41:36.000236 | Virgil |
clojurians | clojure | I think a more interesting thing, if you want to contrast actors with the clojure eco-system, is to contrast them to core.async. | 2017-10-24T16:42:14.000687 | Virgil |
clojurians | clojure | Ah! Haven't seen that one yet, it's definitely on my list. | 2017-10-24T16:42:18.000431 | Carline |
clojurians | clojure | <@Fritz> <https://github.com/technomancy/leiningen/commit/809c7d33ea5ef2ffefa1dc31ace839155955600d> | 2017-10-24T16:43:13.000149 | Shira |
clojurians | clojure | Sure, I know for a fact that I'll have a few actors fans in the audience so... | 2017-10-24T16:43:23.000370 | Carline |
clojurians | clojure | <http://www.dalnefre.com/wp/2010/06/actors-in-clojure-why-not/> | 2017-10-24T16:44:32.000235 | Virgil |
clojurians | clojure | <@Shira> kinda arse when its a 100% internal repo tho | 2017-10-24T16:45:48.000290 | Fritz |
clojurians | clojure | I remember reading this one a few months back and not understanding every bits of the follow up discussion in comments with "Jeff Rose" is really interesting. | 2017-10-24T16:46:29.000606 | Carline |
clojurians | clojure | Well there is a workaround, in the FAQ. What's the alternative if you want to help people avoid talking to HTTP repos in the general case? | 2017-10-24T17:00:06.000731 | Shira |
clojurians | clojure | <@Carline> <http://Clojure.org|Clojure.org> has a rather good overview on actors and "why not" | 2017-10-24T17:05:48.000315 | Sandy |
clojurians | clojure | <https://clojure.org/about/state#actors> | 2017-10-24T17:06:05.000593 | Sandy |
clojurians | clojure | And btw, <http://dalnefre.com|dalnefre.com> is a fantastic site, some really mind-blowing stuff on there. Not stuff I'd use at work everyday, but cool from a geek perspective | 2017-10-24T17:08:18.000214 | Sandy |
clojurians | clojure | I've read that page on <http://clojure.org|clojure.org> a few times already and must admit I haven't fully made my mind up about this... :sweat_smile: | 2017-10-24T17:13:50.000218 | Carline |
clojurians | clojure | I just don't use there concepts enough to get a good picture that is based on experience and not on theory and acquiescence bias | 2017-10-24T17:15:55.000364 | Carline |
clojurians | clojure | I suppose you could run a local HTTPS proxy.. | 2017-10-24T17:18:03.000298 | Fritz |
clojurians | clojure | hi! I’m having problems with ring/compojure since upgrading leiningen. If I create a new app with
> Lein new compojure testapp
it creates the app like it should. But if I try to run it with
> lein ring server
I get this error “java.lang.RuntimeException: No reader function for tag object” | 2017-10-24T17:36:19.000278 | Leota |
clojurians | clojure | any idea how to fix this? | 2017-10-24T17:36:24.000051 | Leota |
clojurians | clojure | Is there a built-in "`split-around`" function? Sort of the opposite of `split-at`...I'm trying to say "keep the closest X values around Y in the given seq" | 2017-10-24T18:25:24.000229 | Daniele |
clojurians | clojure | hey all, i ran into an issue with this foor loop ```(for [gender performer-genders
name performer-names
instrument instrument-names
mood moods]
(do stuff))``` | 2017-10-24T18:57:26.000001 | Kathie |
clojurians | clojure | basically, if any of those lists are empty, then the loop won't iterate over anything, which is expected behavior | 2017-10-24T18:58:03.000110 | Kathie |
clojurians | clojure | the looping behavior im looking for is if one of the list are empty, instead of not looping over anything, do the iteration over the other 3 lists, just ignoring the empty list (binding the value in each iteration to `nil` or something) | 2017-10-24T18:58:51.000023 | Kathie |
clojurians | clojure | does anyone know of a good way to accomplish that | 2017-10-24T18:59:07.000396 | Kathie |
clojurians | clojure | oh wait | 2017-10-24T18:59:40.000178 | Kathie |
clojurians | clojure | i guess i could just check to see if those lists are empty, and if so just bind the variables to `[nil]` seems like that should work | 2017-10-24T19:00:09.000189 | Kathie |
clojurians | clojure | for isn't a loop, it's a list comprehension | 2017-10-24T19:01:08.000175 | Margaret |
clojurians | clojure | if you want a loop, use loop | 2017-10-24T19:01:13.000065 | Margaret |
clojurians | clojure | in particular where you say `(do stuff)` - if your intention is to do anything with a side effect rather than generating data, for is the wrong construct | 2017-10-24T19:02:26.000167 | Margaret |
clojurians | clojure | nah that's just aggregating data within a reduce function | 2017-10-24T19:03:08.000126 | Kathie |
clojurians | clojure | i guess `loop` would be better though since it'd have more explicit semantics then `for` | 2017-10-24T19:03:28.000050 | Kathie |
clojurians | clojure | can someone help me. I'm trying to generate csv file on the fly. using `<http://ring.util.io/piped-input-stream|ring.util.io/piped-input-stream>`. and it works when I'm doing it with `get` request. In my case though I have to do it with post request (because data gets composed via om.next/parser). So this, kinda works:
```
(defn download-csv [req]
(let [result (run-om-query (:body req) (:user req))
query-k (-> req :body ffirst)
data (get-in result [query-k :data])]
{:status 200
:headers {"Content-Type" "text/csv"
"Content-disposition" "attachment; filename=filename.csv"}
:body (ring-io/piped-input-stream
(fn [out]
(let [columns (-> data first keys)]
(with-open [wtr (io/writer out)]
(csv/write-csv wtr [columns])
(doseq [row data]
(csv/write-csv wtr [(map row columns)]))))))}))
```
but browser doesn't "recognize it". no "dowload to" popup comes up, etc. | 2017-10-24T20:28:35.000044 | Clementina |
clojurians | clojure | what's missing? | 2017-10-24T20:29:08.000055 | Clementina |
clojurians | clojure | I have a feeling that this might be not possible in the same request ;( | 2017-10-24T20:32:22.000281 | Clementina |
clojurians | clojure | if it's "post" | 2017-10-24T20:32:27.000175 | Clementina |
clojurians | clojure | If you just drop a valid csv string in there does it work? | 2017-10-24T20:32:37.000192 | Shavonda |
clojurians | clojure | the content it returns from server is fine - it is correct csv. but browser doesn't recognize it as "file download" | 2017-10-24T20:33:16.000007 | Clementina |
clojurians | clojure | as I said - if I ignore the om.parser part, and generate just random csv and use `get`, instead of `post` it works just fine - I don't even have to set the correct content-type and other headers | 2017-10-24T20:34:51.000015 | Clementina |
clojurians | clojure | but I need to use post | 2017-10-24T20:34:57.000220 | Clementina |
clojurians | clojure | <@Clementina> have you tried setting the content-type to application/download | 2017-10-24T21:08:31.000037 | Blair |
clojurians | clojure | I did. it's still didn't work | 2017-10-24T21:34:49.000076 | Clementina |
clojurians | clojure | i use <https://github.com/eligrey/FileSaver.js> but that is browser side, don't know if that helps | 2017-10-24T23:49:18.000140 | Donella |
clojurians | clojure | has a cljsjs wrapper | 2017-10-24T23:49:23.000061 | Donella |
clojurians | clojure | I like using emacs for clojure, is there a way to do code autocompletion, i'm using inferior-clojure module | 2017-10-25T05:01:10.000011 | Corazon |
clojurians | clojure | yes, by using CIDER :wink: | 2017-10-25T05:11:12.000046 | Danuta |
clojurians | clojure | ok, cool. Will check | 2017-10-25T05:26:34.000176 | Corazon |
clojurians | clojure | How about treating vars like ns alias so we can use shorthand for creating keywords associated with a fn like ::myfn/props | 2017-10-25T06:19:42.000363 | Wendi |
clojurians | clojure | does anyone have any experience with hugsql (<https://www.hugsql.org/>)? i'm trying to debug some tricky sql statements and i'd like to see what sql statement hugsql is generating under the hood. | 2017-10-25T06:38:00.000078 | Zola |
clojurians | clojure | ```
;; For most HugSQL usage, you will not need the sqlvec functions.
;; However, sqlvec versions are useful during development and
;; for advanced usage with database functions.
(hugsql/def-sqlvec-fns "princess_bride/db/sql/characters.sql")
```
take a look at def-sqlvec-fns | 2017-10-25T06:39:42.000054 | Efrain |
clojurians | clojure | For myself I found it very useful | 2017-10-25T06:40:05.000387 | Efrain |
clojurians | clojure | cheers! | 2017-10-25T06:42:58.000275 | Zola |
clojurians | clojure | did you end up resolving this? | 2017-10-25T07:36:54.000141 | Candace |
clojurians | clojure | I ran into this issue the other day and I think I had to downgrade back to 2.6.* to fix it | 2017-10-25T07:37:07.000120 | Candace |
clojurians | clojure | <@Zola> the best option would be to check your DB logs. Configure your database to log all the queries into a file. Or you may run the database not as a service but as process. So you’ll see all the queries in the console. For postgres, start it with
`postgres -E -D /usr/local/var/postgres` (on Mac) | 2017-10-25T08:09:05.000230 | Verna |
clojurians | clojure | elegant solution! thanks | 2017-10-25T08:11:39.000144 | Zola |
clojurians | clojure | what is the clojure equiv of C's __FILE__ ? | 2017-10-25T09:21:45.000199 | Berry |
clojurians | clojure | I want some debug msgs to dump __FILE__ so it's easy to figure out where they are coming from | 2017-10-25T09:21:58.000485 | Berry |
clojurians | clojure | You can use `(meta #'any-function-or-variable) ;; => {:line 13, :column 1, :file "path/to/file.clj", :name var-name, :ns #namespace[namespace-where-var-defined]}`
:file is related to your classpath | 2017-10-25T09:44:30.000383 | Efrain |
clojurians | clojure | <https://clojure.org/reference/metadata> there are more information about this | 2017-10-25T09:45:04.000230 | Efrain |
clojurians | clojure | <@Berry> you mean like how tools.logging does? | 2017-10-25T10:25:14.000898 | Jodie |
clojurians | clojure | <@Jodie>: not quite tools.logging: it's ... I'm looking at this cljs app, I see this div, whose body says "todo" -- I want to kow where this "todo" is coming from -- so I grep for "todo" in my source tree -- and I get many matches,
so I'd really prefer is that div said "todo: foobart.clj: line 74" instead of just "todo" | 2017-10-25T11:31:52.000164 | Berry |
clojurians | clojure | <@Berry> you need a macro which looks at `*ns*`, which is how this is done in tools logging | 2017-10-25T11:32:30.000144 | Jodie |
clojurians | clojure | <@Jodie>, <@Efrain>: going with <@Efrain>’s meta solution :slightly_smiling_face: | 2017-10-25T11:37:47.000375 | Berry |
clojurians | clojure | That means they need a reference to the function they are in, no? | 2017-10-25T11:45:05.000913 | Jodie |
clojurians | clojure | I know what I ca ndo (io/copy in out) -- however, is there a nice way to inject a "gunzip" in the middle of it? | 2017-10-25T14:19:47.000231 | Berry |
clojurians | clojure | so the input is a *.gz stream, and for the output, I want an uncompressed stream | 2017-10-25T14:19:59.000523 | Berry |
clojurians | clojure | <@Berry> GZIPInputStream <https://docs.oracle.com/javase/7/docs/api/java/util/zip/GZIPInputStream.html> | 2017-10-25T14:24:15.000837 | Margaret |
clojurians | clojure | very easy to use in my experience | 2017-10-25T14:25:11.000319 | Margaret |
clojurians | clojure | I was just doing this and found a cookbook recipe: <https://github.com/clojure-cookbook/clojure-cookbook/blob/master/04_local-io/4-21_read-write-gzip.asciidoc> | 2017-10-25T14:25:45.000130 | Marx |
clojurians | clojure | nice, I did not reailze you could just 'wrap' java.util.zip.GZIPInputStream.
and have it take care of the rest | 2017-10-25T14:40:26.000472 | Berry |
clojurians | clojure | I am looking for advice to connect to a Mysql Database. I am using jbdc and mysql/mysql-connector-java plugin to run a simple query to my database. however, the connection does not seem to connect (to a my local environment) and not able to pull any data. Does anyone know any helpful tutoriasl or walk-throughs to help me connect to a db.
error messages:
1. {user=******, password=******}, propertyCycle -> 0, testConnectionOnCheckin -> false, testConnectionOnCheckout -> false, unreturnedConnectionTimeout -> 0, usesTraditionalReflectiveProxies -> false ]
2. Cannot JSON encode object of class: class [B: [B@2466ff66 | 2017-10-25T15:26:58.000486 | Lisha |
clojurians | clojure | I would look at the stacktrace for 2, my bet is you have other library loaded that globally extends jdbc to automatically json encode things | 2017-10-25T15:46:06.000054 | Rebeca |
clojurians | clojure | 1 looks like something from a connection pooling library, which again leads me to believe you are dealing with a much larger pile of code then your question suggests | 2017-10-25T15:46:40.000352 | Rebeca |
clojurians | clojure | Does anyone know if there's a 'Storm' channel? Specifically using Clojure spouts/bolts with Storm. | 2017-10-25T16:47:03.000116 | Bibi |
clojurians | clojure | There is not. You might as well ask questions here and see if anyone responds... | 2017-10-25T17:18:52.000053 | Daniell |
clojurians | clojure | Hey guys, I’m looking for some resources/examples of speccing and unit testing database transactions in Clojure w/ clojure.java.jdbc (for now). Does anyone have a project or resource they can point me to for testing functions for reads, writes, and deletes? | 2017-10-25T18:41:31.000030 | Sharlene |
clojurians | clojure | <@Sharlene> Perhaps start with `clojure.java.jdbc`'s own test suite? Your question is a bit vague so I'm not sure what you're really asking. | 2017-10-25T18:42:30.000151 | Daniell |
clojurians | clojure | (I would also say that "unit testing" and "database transactions" don't really go together -- that's more of an "integration test") | 2017-10-25T18:43:19.000062 | Daniell |
clojurians | clojure | So I have a bunch of functions like `(fetch-from-db ...)`, `(insert-into-db! ...)`, `(delete-from-db! ...), and `(update-in-db!)` that I need to test in order to pass my companies ‘code coverage’ standards and I’m not quite sure how to go about it. Like you said, ‘unit testing’ and ‘database transactions’ don’t really go together. I’m absolutely open to another approach given I’m very new to unit/integration testing as long as they’re automated. The automation is non-negotiable as per company standards. | 2017-10-25T18:45:40.000233 | Sharlene |
clojurians | clojure | if you separate all logic into functional data to data transforms without side effects, the part where you talk to the db can be a very small stub that should already be tested by the library you are using | 2017-10-25T18:50:40.000212 | Margaret |
clojurians | clojure | if they ask you to test interaction with the db lib, then you need integration testing instead of unit testing, and someone needs to hook up a db for that testing environment | 2017-10-25T18:51:31.000239 | Margaret |
clojurians | clojure | This also highlights the disadvantage of writing wrappers for things that `clojure.java.jdbc` already does since you are now creating extra code that you need to "test" to pass an arbitrary code coverage rule :slightly_smiling_face: | 2017-10-25T18:52:03.000128 | Daniell |
clojurians | clojure | (as well as actually creating a layer of logic where regressions can occur) | 2017-10-25T18:52:47.000253 | Margaret |
clojurians | clojure | In order to test that `insert-into-db!` "does the right thing" you'd need to read the data back in and assert it matches your expectations -- which means that your tests rely on `fetch-from-db` which is a bit circular. And how would you test that `fetch-from-db` is doing the right thing? (would you `insert-into-db!` and then `fetch-from-db` and compare the result? Again, circular) | 2017-10-25T18:54:17.000042 | Daniell |
clojurians | clojure | Woah, alright, that’s a lot to take in and process, haha! Thanks for all the input guys! I think I know how I’m going to approach the testing/refactoring for this! | 2017-10-25T20:41:54.000213 | Sharlene |
clojurians | clojure | what's the right way of dealing with clojure.edn/read-string reading strings as symbols? e.g.:
```
(type (clojure.edn/read-string "f8f2b6b3-39b8-4e76-a9f0-fa4a65ee225a")) -> clojure.lang.Symbol
; and I want it to be read as a string
``` | 2017-10-25T21:11:16.000023 | Clementina |
clojurians | clojure | it is a string | 2017-10-25T21:12:15.000183 | Rebeca |
clojurians | clojure | you passed it as a string in to read-string | 2017-10-25T21:12:38.000085 | Rebeca |
clojurians | clojure | no, because this works differently `(type (clojure.edn/read-string "\"foo\""))` | 2017-10-25T21:13:55.000229 | Clementina |
clojurians | clojure | sure | 2017-10-25T21:14:02.000132 | Rebeca |
clojurians | clojure | this time it's `java.lang.string` | 2017-10-25T21:14:20.000154 | Clementina |
clojurians | clojure | because in edn notation a `"foo"` is a string, but `foo` is a symbol | 2017-10-25T21:14:24.000094 | Rebeca |
clojurians | clojure | reading `foo` as a string is not edn, so trying to get a library for parsing edn to do it is a fools errand | 2017-10-25T21:15:07.000208 | Rebeca |
clojurians | clojure | so that's what I'm saying, I have no way to know that this "{}" is a map until until it's "read" | 2017-10-25T21:16:13.000217 | Clementina |
clojurians | clojure | I want: "{}" to be read as map; "[]" to be read as vector; "foo" to be read as "foo" -> string | 2017-10-25T21:16:53.000098 | Clementina |
clojurians | clojure | you will have other problem as well, because not all uuids are going to be valid symbols | 2017-10-25T21:17:35.000097 | Rebeca |
clojurians | clojure | likely whatever file you are trying to read is invalid edn | 2017-10-25T21:17:46.000178 | Rebeca |
clojurians | clojure | my guess would be whoever produced it used println instead of prn | 2017-10-25T21:18:19.000081 | Rebeca |
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