#clojure – 2015-07-20

2015-07-20

00:35	crocket	Does anyone know how to step into java instance methods in a clojure debug session?
01:26	crocket	Does anyone use :fill-rolling appender inb unilog?
01:26	crocket	Does anyone use :fill-rolling appender in unilog?
01:26	crocket	Does it ever work for you?
04:27	divya	`(for [x# ["one" "two"]] ~(symbol (str "(calculate-" x# ")"))) .. I'm trying to evaluate dynamic functions based on values passed, but the auto-gensym causes trouble. Can anyone please help to solve ?
06:20	tgoossens	i'm unable to create a table (H2 database) using clojure.jdbc
06:20	tgoossens	I can select tables from information_schema
06:20	tgoossens	so the connection is there
06:20	tgoossens	(j/execute! db ["CREATE TABLE TEST(ID INT PRIMARY KEY, NAME VARCHAR(255))"])
06:20	tgoossens	=> [0]
06:24	kwladyka	tgoossens, are you sure it didn't create this table?
06:24	kwladyka	if not exception error it should success
06:24	kwladyka	i guess
06:24	kwladyka	and be sure to not have this table before run this command
06:25	kwladyka	and... use migrations, don't create database structure in that way
06:31	tgoossens	kwladyka, the table does not appear in information_schema.tables
06:32	kwladyka	tgoossens, did you refresh GUI? did you try paste this SQL directly and check errors?
06:33	tgoossens	kwladyka, {:subprotocol "h2", :classname "org.h2.Driver", :subname "mem:test", :user "", :password ""}
06:33	tgoossens	i'm using H2 in memory btw
06:35	kwladyka	cant be sure how it looks with H2 in memory but for postgresql (def db {:subprotocol "postgresql" :subname "//localhost/clojure" :user "clojure" :password "secret"})
06:36	kwladyka	tgoossens, maybe user cant be empty?
06:36	kwladyka	but still you should get some exception i think
06:38	kwladyka	if not try use this SQL directly in H2, i don't have better idea :)
06:52	crocket	Is there a better way to write https://www.refheap.com/106730 ?
06:53	crocket	I want it to be more concise.
07:01	crocket	(reduce-kv #(assoc %1 %2 (name %3)) overrides)
07:16	lodin_	crocket: You can do (map #(update 1 name) a-map) instead of using for.
07:16	lodin_	err, #(update % 1 name)
07:17	lodin_	crocket: But I'd just write a map-vals (or use any utility library that defines it already), and do (map-vals name a-map).
07:20	crocket	I used (reduce-kv #(assoc %1 %2 (name %3)) {} overrides)
07:21	lodin_	crocket: Personally I have a utility function map* that is a multimethod that essentially is (into (empty xs) (map f xs)), but it doesn't reverse the order for seqs and lists.
07:21	crocket	lodin_, (map #(update % 1 name) a-map) emits a sequence.
07:21	lodin_	crocket: for does too.
07:22	crocket	lodin_, (reduce-kv) is the most concise.
07:22	lodin_	crocket: I think map-vals is if ever do it more than once. :-)
07:24	lodin_	(map-vals name a-map). Hard to beat.
07:25	crocket	Write a macro
07:27	crocket	(defmacro map-vals [fn & maps] `(into {} (map ~fn ~@maps)))
07:27	crocket	Ha
07:28	crocket	oops
07:28	lodin_	Why macro?
07:29	wasamasa	drunk with power
07:29	lodin_	haha
07:30	wasamasa	looks like apply could solve that one
07:34	lodin_	crocket: I would guess that using into would be more efficient since it uses transients, but I don't have anything to support that.
08:30	lodin_	Ah. kv-reduce uses Java methods for built-in data types.
09:49	kwladyka	How to write this code more beauty? https://www.refheap.com/52cb9e4cae3109242f39b4731
09:50	kwladyka	i don't like the way how i use concat 3 times
09:53	Lollypop_	hey does anyone know if you can make spigot plugins with clojure?
10:41	tgoossens	I have no idea where the nullpointer comes from. https://gist.github.com/tgoossens/1c4506e7c36b4409fbe4 . When I manually execute thsis function step by step in reple no problem.
10:41	tgoossens	BUt when I run it
10:41	tgoossens	(.getTuple t key)
10:41	tgoossens	gives nil
10:41	tgoossens	is there a problem with using let in doseq or something,
10:52	crocket	hi
10:54	crocket	Can I justok
10:54	crocket	It seems I can load new clojure modules during runtime.
10:55	crocket	If the current directory is in classpath, I put some .clj files in the classpath and let my program dynamically require them.
10:55	crocket	Or, I could use an integrated REPL to (require them)
10:56	crocket	Brilliant
11:05	noncom	what's the clojure way to get a base64 of a string?
11:12	dstockton	noncom: data.codec has an encode function https://github.com/clojure/data.codec/blob/master/src/main/clojure/clojure/data/codec/base64.clj#L230
11:12	noncom	yeah, well, ended up with this: https://github.com/xsc/base64-clj it is simpler...
11:12	dstockton	or that, yes
11:13	noncom	i just thought it'd be present out-of-the-box, but no
11:13	dstockton	you could use some java interop
11:13	noncom	yeah, java :)
11:46	Empperi	it's not bad after java 8
11:46	Empperi	it has built in base64 encoding
11:47	Empperi	some javaisms though like you need to get an encoder first before you can encode
11:47	Empperi	but nothing terrible
11:56	noncom	Empperi: yeah, but i thought, you know, like (one-word-fn-does-all-magic ...) like they wrap the java.io ...
11:57	noncom	i have a basic cli utility architecture question
11:57	noncom	say, i am building a jar, and from the cli i want to be able to launch different fns from different nses
11:57	noncom	what is the best way to organize this?
11:57	noncom	currently i am passing something like "(my-ns/my-fn {args})" as the string arg and eval it
11:57	noncom	maybe there are better alternatives?
12:02	justin_smith	noncom: use java -cp your.uber.jar clojure.main your.ns/your-fn
12:12	noncom	justin_smith: alright, waht about apssing params? them just go next?
12:12	noncom	do i write them in quotes like " ?
12:12	justin_smith	noncom: hmm - I'm gonna have to experiment
12:12	noncom	well, i think, i will experiment, since it's my task to realize this :D
12:13	justin_smith	noncom: I'm also interested in knowing the answer
12:13	noncom	cool, then someone of us will do it faster.. i'll get to this today, when i finish the script
12:13	noncom	and upload it to the CI
12:13	noncom	btw, are you using any CI?
12:15	justin_smith	noncom: java -cp your.uber.jar clojure.main "(require 'my.ns) (my.ns/foo \"some arg that is a string\" 1 :a)"
12:15	noncom	i've managed to push it to use clojure on our CI :D
12:15	noncom	oh, that
12:15	justin_smith	noncom: CI? no, I should be
12:16	justin_smith	noncom: yeah, I think unless your function is called -main, that's the one way to do it
12:16	justin_smith	if it is called -main, you can just pass the namespace name, followed by args (all will be passed as strings)
12:17	justin_smith	noncom: I definitely do the "more than one ns has a -main" thing, to support different launch profiles
12:17	noncom	well, my current way is java -jar myjar.jar "(my.ns/foo {argzz})" and i require the my.ns into the main ns beforehand ...
12:17	noncom	our approaches are similar
12:17	justin_smith	yes
12:18	justin_smith	the -jar thing works? it doesn't just hand that string to your -main in your main ns?
12:33	egogiraffe	quick question: was reading ch.6 in Joy of Clojure and punching in these lines of code for comparing rest vs. next into my repl, and i get, well, not what the book expects me to get. http://i.imgur.com/bpGJA6h.png book/repl side by side in the image.
12:35	elvis4526	Is it possible to use extend-protocol on a class, and all its derived classes ?
12:36	elvis4526	I used extended-protocol on the JSONWriter protocol with the java.lang.Exception class - is there a way that all derived class from Exception get the same implementation too ? (like PSQLException grr...)
12:38	egogiraffe	this is the second edition of the joy of clojure, as well, so perhaps, although i would find it a bit of a leap, that the mechanics of laziness behind rest & next changed at some point between publication and the current version of clojure? but i'm just spitballing, because it is still v. odd to me that there is that discrepency.
12:42	danielpcox	egogiraffe: that's interesting. i just did it with clojure 1.6.0 and I get what the book expects
12:44	egogiraffe	hm. i shall try it with 1.6.0 as well, and see what it returns for me.
12:44	danielpcox	egogiraffe: and i get what you get when i retry it with 1.7.0
12:44	noncom	justin_smith: yes, it does pass it into -main
12:44	egogiraffe	more interesting yet!
12:45	noncom	justin_smith: there i just (-> args first read-string eval)
12:48	egogiraffe	danielpcox: yes, i get the expected results in 1.6.0 as well. given how recent 1.7.0 was, i thought it would be within the realm of possibility that it could have to do with versions.
12:49	egogiraffe	i suppose i should send a mention of this to the authors, so that they can take a look at it and adjust/update accordingly.
12:50	danielpcox	egogiraffe: good plan. I notice there's no difference in next's implementation: https://github.com/clojure/clojure/blob/clojure-1.6.0/src/jvm/clojure/lang/RT.java#L596 https://github.com/clojure/clojure/blob/clojure-1.7.0/src/jvm/clojure/lang/RT.java#L672
12:51	puredanger	iterate changed in 1.7
12:56	danielpcox	puredanger: that's interesting
12:57	danielpcox	thanks
13:27	divya	Hey guys.
13:27	divya	why isnt this valid ?
13:27	divya	~(symbol (str "(function-name)"))
13:27	clojurebot	Huh?
13:31	amalloy	divya: why isn't ~5 valid?
13:32	justin_smith	noncom: OK, so the difference is with the -cp version, you don't need a -main that calls eval
13:32	noncom	justin_smith: turns out to be so!
13:33	noncom	divya: what are you trying to do, anyway?
13:33	noncom	divya: maybe you give us the full code and state your intent?
13:33	divya	i get your point. Do you see what i'm trying to do ? To construct fn names from a string and evaluate it in a macro. What's the best way to do that?
13:35	noncom	ummm.. something like `(eval (list fn (symbol ~your-string) ~@body)) ?
13:35	noncom	(did not test)
13:35	noncom	but all in all that does not look like a good idea...
13:35	noncom	consing fn names is almost never a good idea...
13:35	justin_smith	noncom: you really shouldn't need eval in a macro
13:36	noncom	ah, probably. there should be a better way
13:36	justin_smith	,(defmacro dontdothis [] (list (symbol (str "print" "ln")) "foo"))
13:36	clojurebot	#'sandbox/dontdothis
13:36	justin_smith	,(dontdothis)
13:36	clojurebot	foo\n
13:37	divya	Yeah, I realise it's not a good idea. But I'm just trying to find a way around that.
13:38	noncom	yes, and justing right, macros always have an implicit eval
13:38	noncom	*justin, sorry :)
13:39	justin_smith	,(defmacro dont [s] (list (symbol s)))
13:39	clojurebot	#'sandbox/dont
13:39	justin_smith	,(dont "newline")
13:39	clojurebot	\n
13:40	justin_smith	this is a terrible way to do things, it throws away nearly everything that is nice about clojure macros, and puts you back in the world of C macros.
13:41	justin_smith	what changed with newer ring versions such that endpoints returning a string cause the error "java.lang.String cannot be cast to java.util.Map" - older ring versions implicitly built a response map with the string under the :body key
13:41	justin_smith	was this functionality moved into compojure or something?
13:42	justin_smith	I mean I can make my own middleware that does that based on the type of the thing returned, of course, but I wonder if the middleware still exists and was moved or what.
13:44	amalloy	justin_smith: forget about terribleness, it just doesn't work because macros run at compile time and you don't have the avlue of this string until runtime
13:44	divya	Justin: Thanks, just curious.
13:44	justin_smith	amalloy: ahh, that too - yeah it will totally break if the arg is not a string literal
13:44	amalloy	justin_smith: do you perhaps have a middleware that expects a map before the point at which ring would have converted a string to a map?
13:45	amalloy	(and if the arg is a string literal then this entire exercise is pointless)
13:45	justin_smith	amalloy: stack trace is in http-kit, with the caller being a future
13:45	justin_smith	amalloy: true
13:46	justin_smith	amalloy: at org.httpkit.server.HttpHandler.run(RingHandler.java:91) - older ring versions turn a string into a map before we get this far
13:46	amalloy	the moral of the story is to never upgrade anything
13:46	justin_smith	it's an implicit conversion that isn't happening any more, changing ring versions changes the behavior (1.3.0 -> 1.3.2+)
13:47	justin_smith	the version where the change happened makes me think it might not have been intentional...
13:48	justin_smith	amalloy: co-worker upgraded lib version (I assume he had a good reason...) he's on vacation now and things are broken on staging. Such is the life of a developer.
13:59	gfredericks	can cljc be used in libraries without requiring users of the library to be on clojure 1.7?
13:59	justin_smith	gfredericks: checking my all-cljc uberjar to see inside right now...
14:00	gfredericks	I'm betting not
14:00	justin_smith	gfredericks: the jar task does not create any clj/cljs tasks here, only cljc source files end up in the jar
14:00	justin_smith	so yeah
14:00	gfredericks	so there's either a several year period where high-profile libs can't use cljc or we need another tool
14:01	amalloy	what is this cljc thing
14:02	gfredericks	amalloy: https://github.com/clojure/clojure/blob/master/changes.md#22-reader-conditionals
14:03	amalloy	oh. it's cljx, blessed?
14:03	justin_smith	and simplified, yeah
14:04	gfredericks	well cljx doesn't have the problem I'm bringing up though
14:04	justin_smith	gfredericks: why several year, because it will take that long before the rest of the world is using 1.7?
14:04	gfredericks	yeah
14:04	justin_smith	gfredericks: I bet we could make a lein-cljc plugin for generating backward compatible jars...
14:04	gfredericks	maybe not, depends on your tolerance for forcing other people to upgrade
14:05	gfredericks	justin_smith: by reading the cljc file in the appropriate way and then prning it back out?
14:05	gfredericks	I'm not sure if a lein plugin would work in my case since it's a contrib project
14:06	justin_smith	gfredericks: yeah, generating clj and cljs which would be after the cljc on the classpath
14:06	justin_smith	ahh
14:09	gfredericks	hmm
14:09	gfredericks	well actually
14:09	gfredericks	if the lein plugin or whatever spit things onto the filesystem instead of just into the jar
14:10	gfredericks	that would probably be useable
14:10	gfredericks	I think you can have cljc/clj/cljs files all in the same jar
14:10	gfredericks	and 1.7 would load the cljc file and 1.6 would load the other files
14:11	justin_smith	gfredericks: right, that's kind of what I was thinking
14:11	puredanger	clj and cljs are loaded before cljc if both exist
14:11	gfredericks	wait
14:11	gfredericks	yes
14:11	puredanger	Regardless of classpath order
14:11	gfredericks	I just went to my gmail and typed "Alex Miller" into the search box in order to answer that question
14:11	gfredericks	because I knew it had come up recently
14:12	gfredericks	puredanger: am I correct that there is a bit more tooling necessary to use cljc from a contrib library w/o requiring users to upgrade to 1.7?
14:12	puredanger	Yeah, can't say that I thought about that enough
14:13	puredanger	Although I expected it to be adopted much more slowly
14:13	gfredericks	I'm thinking just something that reads each .cljc and spits out a .cljs and a .clj
14:13	gfredericks	and ship all three in the jar
14:13	puredanger	Which is basically cljx
14:13	gfredericks	yep
14:13	gfredericks	well
14:13	puredanger	Ironic
14:13	gfredericks	puredanger: I'm wondering for test.check
14:13	gfredericks	where I suspect cljx doesn't work?
14:14	gfredericks	I'm assuming hudson is only looking at the pom.xml
14:14	puredanger	Yes
14:14	gfredericks	so the most practical thing would be to commit all the files
14:15	puredanger	Although I've been playing with a boot build for contrib (purely experimental right now)
14:16	puredanger	Mixed platform builds in contrib are a mess, so that's gotta be fixed
14:17	gfredericks	right now we just have two copypasta'd source trees
14:18	gfredericks	so checking in generated files doesn't seem any worse than that
14:22	gfredericks	man just running tests with 1.6 is going to be difficult o_O
14:22	gfredericks	was trying to decide if I should update the generated files on each commit or just before a release :/
14:37	TimMc	It's 2015 and we still don't have a good way of handling generated code.
14:54	wasamasa	sweep it under the rug?
15:00	noncom	we still don't have many things
15:12	justin_smith	gfredericks: what about generating files as a pre-action for making the jar, not checking them into git, and making a test runner that operates on the jar rather than the source for 1.6? I guess that's kind of weird.
15:13	gfredericks	justin_smith: the building-the-jar part still needs to be compatible with lein-free-hudson
15:13	justin_smith	ahh - but it could require 1.7 right?
15:13	gfredericks	I guess...?
15:14	justin_smith	I'm thinking if the build task was abstracted so it could run without lein. But that's probably a pointless rabbithole.
15:15	gfredericks	and then call out to something from maven?
15:15	justin_smith	Yeah. But that's probably more trouble than all this is worth, the more I think about it.
15:16	gfredericks	I dunno, could be less hacky than anything else I was thinking of
15:17	justin_smith	like, if all it took was a read+spit using 1.7 for each cljc file to a new clj file - that could as easily be invoked by a maven task by loading your clojure dep as it could be by lein I guess?
15:17	gfredericks	right
15:43	gfredericks	what is the goodest way to run tests for a cljs lib that has nothing to do with browsers/dom?
15:43	gfredericks	in terms of js runtimes
15:59	justin_smith	oh my god logging library dep collisions are terrible
15:59	justin_smith	yuck
16:00	gfredericks	yay logging libraries!
16:00	gfredericks	or more accurately, yay, logging from libraries!
16:01	justin_smith	gfredericks: if libraries that aren't for logging stopped depending on concrete logger implementations, this could be avoided
16:01	justin_smith	maybe?? I hope.
16:03	gfredericks	I'd like to think that but I like structured logging
16:03	gfredericks	and none of the abstract libraries seem to support that
16:03	justin_smith	gfredericks: ugh.
16:03	gfredericks	maybe we need yet another proxy library
16:04	gfredericks	so your library logs to log-cabin which at runtime proxies to clojure.tools.logging which at runtime proxies to slf4j which proxies to logback
16:04	justin_smith	gfredericks: could call it yalp - yet another logging proxy
16:04	gfredericks	I was thinking log-cabin because it's structured
16:04	gfredericks	maybe just cabin?
16:05	justin_smith	whelp - well heres _ logging proxy
16:05	justin_smith	where _ starts with e and makes sense
16:05	TimMc	e is for underscorE
16:05	gfredericks	why not just whalp
16:05	justin_smith	gfredericks: that works too
16:06	oddcully	gwargl -- the sound you make the last time you had to deal with loggin stuff
16:06	TimMc	welp - we excrete logging proxies
16:07	TimMc	(Please don't use that.)
16:07	justin_smith	¯\_(ツ)_/¯ - ¯oggers \ucking _uck (ut ツe )ade _nother /hat ¯ver
16:10	gfredericks	I wonder if tools.logging would ever support structured logs
16:10	gfredericks	there's probably a lot of gross design questions
16:12	gfredericks	mostly related to how it interacts with the impl libs -- i.e., does it serialize before or after?
16:12	gfredericks	it's all terrible
16:12	justin_smith	gfredericks: the hard part is we want features that the old API can't provide, and the old API is made worse by the long list of half-assed improvements that didn't fix things (partially due to their attempts to be compatible with the original)
16:12	justin_smith	which makes me think "burn it all down"
16:13	gfredericks	you'll still have to deal with other people's libraries using slf4j or something
16:13	justin_smith	right, yeah
16:13	gfredericks	though we could implement the slf4j api I guess?
16:13	xemdetia	clojure 1.8.0 now with 4j based logging in core
16:13	justin_smith	xemdetia: at least that way we could just pick something I guess
16:16	redcoat	Okay, so something Rich Hickey said in a talk finally clicked with me
16:18	redcoat	I was discussing STM with someone and how one would implement that for quite sizable data structures in a language without it. They mentioned that compare and swap wasn't the only necessary component; you would also need a write logging mechanism for the retries, and that makes sense to me.
16:18	redcoat	So that's quite a lot of machinery. But then I remembered what Rich Hickey said about functional data structures: if you use them, then STM only needs to do a single compare and swap on the pointer.
16:20	redcoat	And if the operations in your atomic block are pure functions, then you're guaranteed to have operationally valid retries. Am I correct in what I'm saying?
16:22	amalloy	that is certainly true for atoms. for multi-object transactions on refs or something, i think you need a bit more but i'm not sure what
16:23	gfredericks	people so rarely use the stm with multiple refs though
16:23	gfredericks	is cljs broken with clojure 1.7?
16:24	gfredericks	I'm getting "Wrong number of args (2) passed to: reader/read" from the cljs.analyzer namespace
16:24	gfredericks	it's probably something else
16:25	justin_smith	hmm, I thought atoms weren't STM? could be I'm misinformed and I am forgetting my source
16:26	amalloy	they're not
16:26	amalloy	folks just usually don't distinguish between them
16:26	justin_smith	so only refs are STM, atoms and agents are their own things separate from that, right?
16:27	amalloy	no, refs and agents
16:27	gfredericks	with agents you can send things from a transaction and only have it really sent if the transaction completes
16:27	justin_smith	thanks for clarifying. I was going by the fact that clojure.org/refs did not mention agents at all
16:27	justin_smith	aha
16:29	Bronsa	gfredericks: that usually means you're pulling an older version of tools.reader than the one cljs needs
16:29	gfredericks	Bronsa: yeah that was it
16:29	gfredericks	my good ole user profile
16:34	gfredericks	I'm re-pondering rich numeric literals in cljs
16:35	gfredericks	my guess is there's still not a good way to do that
16:36	gfredericks	even with data readers
17:10	ed-g	Hello, does anyone have experience with sending vector data to a database, either as a set or a Postgres array object? I'm using clj-postgresql and attempting to use PGobject with type "anyarray", the postgres driver doesn't like it.
17:10	gfredericks	ed-g: I've done the postgres array thing with integer vectors
17:11	gfredericks	I don't know anything about clj-postgresql though, I was just using java.jdbc
17:11	ed-g	gfredericks, is any of your code open source? I'm trying to pose an intelligent question but I don't know enough context with java databases so it feels like I'm going in circles.
17:12	gfredericks	I think I did it by extending the SQLValue protocol in java.jdbc
17:12	gfredericks	and maybe manually creating the sql syntax for an array
17:12	gfredericks	it's not open source
17:13	ed-g	gfredericks, thanks :-) I'll look into the SQLValue protocol
17:13	ed-g	(inc gfredericks)
17:13	lazybot	⇒ 140
17:27	sobel	ed-g: i did this in a sandbox project, and it was pretty easy given a quick google search. it takes like 1-2 lines of code to add the protocol for arrays.
17:27	sobel	i'd share but it's at home. it was easy though.
17:32	ed-g	sobel, that's encouraging
17:33	gfredericks	ed-g: reading the clojure.java.jdbc source is pretty instructive
17:36	sobel	i know jdbc from experience but have never had a book on it. the web got me through easily.
17:36	ed-g	yeah wish I could say the same, I've been working on this for two days now
17:37	ed-g	gfredericks, thanks I'll check that out
17:37	ed-g	(inc sobel)
17:37	lazybot	⇒ 2
17:37	sobel	http://stackoverflow.com/questions/22959804/inserting-postgresql-arrays-with-clojure
17:37	gfredericks	dnolen: the clojure.test vs. cljs.test naming convention would somewhat preclude eventually using cljc in test.check, wouldn't it?
17:37	sobel	was the page that helped me, actually
17:38	dnolen	gfredericks: I don't how
17:38	dnolen	er
17:38	dnolen	"I don't see how"
17:38	dnolen	gfredericks: conditional reading can happen anywhere including ns forms.
17:39	gfredericks	dnolen: but the filenames can't vary
17:40	dnolen	gfredericks: you're not saying anything that makes any sense to me yet.
17:40	gfredericks	dnolen: I'm talking about the test.check codebase, not a user's codebase
17:40	dnolen	gfredericks: still not making any sense
17:40	gfredericks	so currently it has two code trees
17:40	gfredericks	with mostly pasted code
17:41	gfredericks	and I figured merging those into .cljc files would eventually eliminate the copypasta
17:41	gfredericks	but doing (ns #?(:clj clojure.test.check :cljs cljs.test.check)) seems problematic
17:41	dnolen	gfredericks: just pick the same alias ... done
17:42	gfredericks	because the file can't be at .../clojure/test/check.cljc AND .../cljs/test/check.cljc
17:42	dnolen	gfredericks: for imports
17:42	dnolen	gfredericks: for the main namespace itself you have to be OK with a breaking change.
17:42	dnolen	but this is a search replace
17:42	gfredericks	you mean renaming cljs.test.check => clojure.test.check?
17:42	dnolen	so IMO not a big deal
17:42	dnolen	yeah, why not?
17:43	gfredericks	it's fine with me, I wasn't sure how opinionated of a convention "cljs.test[....]" was
17:43	gfredericks	which is why I'm asking you since I figured you came up with it :)
17:43	gfredericks	but it sounds like you don't think it is a big deal from an ecosystem cohesiveness standpoint
17:44	gfredericks	so I will plan on namespace-changing being an option
17:44	dnolen	gfredericks: could have been same since the file extension is the differentiator
17:44	gfredericks	right
17:44	dnolen	but there wasn't a deep reason
17:45	gfredericks	dnolen: cool, thanks
17:46	dnolen	gfredericks: the only thing to be careful of is that test.check was written in a bit of a clean Haskell-ish style, lots of partial and comp instead of #(foo ...)
17:46	dnolen	in ClojureScript I made a bunch of smaller minor changes to remove that to get 10X perf bump.
17:46	gfredericks	oooh gotcha
17:46	dnolen	so you will regress perf (which currently is in the Clojure ballpark) if you're not careful.
17:47	ed-g	sobel, thanks! that stack overflow pointed me in the right direction.
17:47	gfredericks	dnolen: time to write some macros for partial and comp maybe :)
17:48	wits_end	I'm trying to get lwjgl3 working but am stuck with UnsatisfiedLinkError and could use a nudge. Has anyone gotten it to work since being released to Maven? Or able to give me a clue on what I'm doing wrong with the path?
17:48	gfredericks	dnolen: how did you do your perf testing?
17:49	dnolen	gfredericks: test.check is slow
17:49	gfredericks	I'm hoping to port the RNG soon so that will be relevant
17:49	dnolen	everything serious is measured in seconds already
17:49	dnolen	so just ran it's own tests
17:49	dnolen	and timed that
17:49	gfredericks	oh right I need to figure out how to run its own test suite first :)
17:50	dnolen	gfredericks: there's really nothing to do. lein cljsbuild once test-build-id
17:50	dnolen	as long as you have Node.js installed, that's it
17:51	gfredericks	dnolen: okay thanks
17:51	dnolen	gfredericks: np!
18:04	ed-g	Ok one more dumb question. How do I create a java array of boxed integers? (make-array Integer/type [1 2 3]) is type [I when what I want is array of java.lang.Integer's
18:06	ed-g	never mind. object-array is what I need. Thanks everyone for all the help today!
18:06	gfredericks	,(type (make-array Integer [1 2 3]))
18:06	clojurebot	#error {\n :cause "clojure.lang.PersistentVector cannot be cast to java.lang.Character"\n :via\n [{:type java.lang.ClassCastException\n :message "clojure.lang.PersistentVector cannot be cast to java.lang.Character"\n :at [clojure.lang.RT intCast "RT.java" 1163]}]\n :trace\n [[clojure.lang.RT intCast "RT.java" 1163]\n [clojure.core$make_array invoke "core.clj" 3839]\n [sandbox$eval25 invoke "...
18:07	gfredericks	what
18:07	amalloy	gfredericks: it's not into-array
18:07	gfredericks	,(type (into-array Integer [1 2 3]))
18:07	clojurebot	#error {\n :cause "array element type mismatch"\n :via\n [{:type java.lang.IllegalArgumentException\n :message "array element type mismatch"\n :at [java.lang.reflect.Array set "Array.java" -2]}]\n :trace\n [[java.lang.reflect.Array set "Array.java" -2]\n [clojure.lang.RT seqToTypedArray "RT.java" 1719]\n [clojure.core$into_array invoke "core.clj" 3319]\n [sandbox$eval49 invoke "NO_SOURCE_FI...
18:07	amalloy	and of course 1 is a Long
18:07	gfredericks	whatever
18:07	ed-g	gfredericks, I ended up with #(object-array (map int %))
18:08	gfredericks	,(type (into-array Integer (map int [1 2 3])))
18:08	clojurebot	[Ljava.lang.Integer;
18:08	amalloy	ed-g: that's an Object[] though
18:08	amalloy	just replace object-array with into-array
18:09	ed-g	amalloy, ok my grasp of JVM is tenuous. I thought I wanted boxed integer but what I actually wanted was array of objects each of which is integer. This fits the protocol for jdbc .createArrayOf
18:11	ed-g	(inc amalloy)
18:11	lazybot	⇒ 288
18:11	ed-g	(inc gfredericks)
18:11	lazybot	⇒ 141
18:11	gfredericks	is `lein test` broken for cljc test files?
18:17	gfredericks	how do you refer macros in cljs?
18:18	amalloy	gfredericks: require-macros with :refer, i'd guess?
18:18	gfredericks	that's what I thought too :/
18:18	gfredericks	wait
18:18	gfredericks	I Mean
18:18	gfredericks	I used
18:19	gfredericks	(:require [thing] :refer [what] :include-macros true)
18:19	gfredericks	I didn't actually try (:require-macros ...)
18:25	dnolen	gfredericks: :include-macros just loads a macro ns with the same name, it interacts in no other way with :require
18:26	dnolen	gfredericks: you want :require-macros + :refer
18:27	dnolen	gfredericks: well "interacts in no other way with :require" beyond :as support.
18:31	gfredericks	dnolen: cool, thanks
18:45	justin_smith	oh wow, how did it take me this long to discover this: ##(let [{:keys {a b c d}} {:a 0 :b 1 :c 2 :d 3}] (print a b c d))
18:45	lazybot	⇒ nil nil nil nilnil
18:45	justin_smith	LOL
18:46	justin_smith	the awesome thing is that it somehow makes sure a,b,c,d are all valid for access, but also they are all just nil
18:47	TimMc	justin_smith: That was a short walk and I'm not sure what you're talking about.
18:47	justin_smith	TimMc: ##(let [{:keys {a b c d}} {:a 0 :b 1 :c 2 :d 3}] (print a b c d))
18:47	lazybot	⇒ nil nil nil nilnil
18:48	TimMc	justin_smith: Do you mean [a b c d]?
18:54	justin_smith	TimMc: I destructured, I used the wrong kind of brackets, instead of getting any sort of sensible error it just bound all my keys to nil
18:54	justin_smith	TimMc: leading to a lot of head scratching and shotgun debugging
18:55	justin_smith	TimMc: if I had seen the code and read it carefully, I would not have expected b and d to be bound to anything, and I would have been dubious about it running at all
18:55	justin_smith	*compiling
19:14	TimMc	justin_smith: Ah! I see, you're marvelling that it didn't error out.
19:14	justin_smith	right
19:15	justin_smith	the fact that it happily gives me nil so my usage of all those bindings fails...
19:15	justin_smith	it must tree-walk to find all the bindings in the destructure or something?
19:16	TimMc	nothing so fancy
19:16	TimMc	&(destructure '[{:keys {AAAAA BBBBB}} _])
19:16	lazybot	⇒ [map__13793 _ map__13793 (if (clojure.core/seq? map__13793) (clojure.lang.PersistentHashMap/create (clojure.core/seq map__13793)) map__13793) vec__13794 (clojure.core/get map__13793 :[AAAAA BBBBB]) AAAAA (clojure.core/nth vec__13794 0 nil) BBBBB (clojure.core/nth vec__13794 1 nil)]
19:17	TimMc	&:[AAAAA BBBBB]
19:17	lazybot	java.lang.RuntimeException: Invalid token: :
19:17	TimMc	&':[AAAAA BBBBB]
19:17	lazybot	java.lang.RuntimeException: Invalid token: :
19:17	TimMc	Oooh, ##(keyword '[AAAAA BBBBB])
19:17	lazybot	⇒ nil
19:18	TimMc	what is it even
19:19	justin_smith	,(let [{:keys {a b}}] {(keyword (str '[a b])) 42}] #_#_ now what)
19:19	clojurebot	#<RuntimeException java.lang.RuntimeException: Unmatched delimiter: ]>
19:19	TimMc	Some part of that macro knows that [AAAAA BBBBB] is a vector, and some part fails to understand that. :-)
19:20	justin_smith	an oddity
19:20	justin_smith	would be a fun trick for an obfuscated clojure contest
19:20	TimMc	&(let [{:keys {AAAAA BBBBB}} {(keyword "[AAAAA BBBBB]") [5 6]}] AAAAA)
19:20	lazybot	⇒ 5
19:20	justin_smith	hahaha, of course
19:24	TimMc	It's that (if (keyword? %) % (keyword (str %)))
19:28	TimMc	So it extracts the value by keywordizing the LHS, but it then looks at the LHS and sees that it needs to do further destructuring.
19:30	justin_smith	how babby wat is formd
20:53	rpaulo	clojure on my iOS device!
21:06	mfikes	rpaulo: Yeah, you can't really tell it is ClojureScript for most stuff.
21:11	rpaulo	I also dislike Rich's commit messages, but what can I do...
21:19	lvh	Huh. Does unquote-splice inside syntax-quote qualify all syms with clojure.core?
21:20	lvh	I have a test fixture macro, and it's complaining that it can't find shrieker.fixtures/is
21:20	lvh	err, sorry, qualify all syms with the macro's ns
21:21	justin_smith	lvh: that's what syntax-quote is for
21:21	lvh	justin_smith: But the `is` is being spliced in; not part of the macro
21:22	justin_smith	you can pull dirty tricks if you don't want that like ~'foo, or you can just not use syntax-quote
21:22	lvh	`is` is a thing in the calling namespace
21:22	justin_smith	lvh: then you should be properly interning is (I assume test/is)
21:23	lvh	Eh, okay; I'll do without the syntax quote then
21:23	justin_smith	lvh: you can use syntax quote, if you :use clojure.test, or :require clojure.test :refer [is]
21:23	lvh	justin_smith: In the calling namespace?
21:24	lvh	I'm already doing :refer :all there
21:24	justin_smith	lvh: in the namespace defining the macro, if you want to call is in the macro
21:24	lvh	justin_smith: `is` is inside the body I'm unquote-splicing into the macro
21:25	justin_smith	lvh: in that case you need to require / refer it in the namespace using the macro, yes
21:25	lvh	justin_smith: hm, adding it to the defining ns fixed the error
21:26	lvh	oh, derp
21:26	justin_smith	?
21:26	lvh	OK, so I do remember how syntax quote works
21:26	lvh	I just forgot that I am actually using is in the macro...
21:26	lvh	and, it previously worked because I moved the macro around
21:26	lvh	yay global state
21:27	lvh	justin_smith: Sorry & thanks :)
21:27	lvh	(inc justin_smith)
21:27	lazybot	⇒ 278
21:30	creese	I'm trying to create a leiningen template and hitting a snag.
23:09	crocket	Are there traps in dynamically requiring a clojure namespace?
23:09	justin_smith	crocket: you can call require at runtime
23:11	crocket	justin_smith, Does a standalone uberjar include the current directory in the classpath?
23:11	crocket	Ah, that depends on how I invoke java.
23:12	crocket	If I include a specific directory in the classpath, I'll be able to load clojure plugins dynamically on runtime.
23:12	crocket	Can I remove a namespace after loading?
23:14	crocket	Ah, there is remove-ns function.
23:14	crocket	Be careful
23:14	crocket	To emulate a plugin system, is it sane to include a directory in the classpath and require a namespace from that directory and remove the namespace later?
23:20	crocket	Does require compile .clj files during runtime?
23:23	justin_smith	crocket: yes, clojure always compiles files if you load them.
23:24	justin_smith	if you want to load a specific file, you might want load-file rather than require
23:24	justin_smith	for require to work, the file has to be on a relative path matching the ns
23:24	crocket	justin_smith, I created a .clj file after cider REPL launched and required it to see an e rror.
23:25	crocket	Does the namespace in a .cljfile have to match 'path.to.file.filename'?
23:26	justin_smith	yes
23:26	justin_smith	that's what I just said
23:26	justin_smith	that's why you probably want load-file
23:30	crocket	justin_smith, The file is on a relative path matching the ns.
23:30	crocket	Ouch
23:30	crocket	require failed because there was a typo in my .clj file.
23:30	justin_smith	:reload is your friend here, of course
23:31	justin_smith	but if what you explicitly want is to load a specific file at runtime, load-file might match that better anyway
23:31	justin_smith	if you used something like ScriptEngine with cljs you'd also get sandboxing etc., dunno if any of that matters. Clojure code can do wonky things to the vm / clojure itself.
23:32	crocket	It's weird
23:32	crocket	(require 'clojure-test.oho) returns nil without an error, but there is no actual clojure-test.oho namespace.
23:33	justin_smith	crocket: if you don't specify :reload, and it has already tried to load the ns, it will keep returning nil if you require it
23:34	justin_smith	whether it worked the first time, or not
23:34	crocket	ga
23:34	justin_smith	try (require 'clojure-test.oho :reload)
23:34	justin_smith	or you could just use load-file
23:34	crocket	ok
23:35	crocket	:reload
23:35	crocket	:reload is ok
23:38	crocket	It seems require and load-file evaluates .clj files without actually changing the current namespace.
23:38	justin_smith	yes, that's true
23:38	justin_smith	the namespace is changed while code from that file is loaded, and should remain the same in your repl
23:38	justin_smith	the namespace isn't changed if the file doesn't do anything to change the ns though
23:40	crocket	justin_smith, Each file calls (ns) at the top.
23:40	crocket	Calling (ns) in REPL changes the current namespace.
23:40	justin_smith	yes, it's different when evaluating files
23:41	crocket	I thought load-file would act as if everything in a file was invoked in REPL.
23:41	crocket	,(doc load-file)
23:41	clojurebot	"([name]); Sequentially read and evaluate the set of forms contained in the file."
23:41	crocket	The explanation was misleading.
23:42	crocket	Probably, load-file and require remember ns and restore it after they finish.
23:43	crocket	This is great
23:43	crocket	justin_smith, Have you ever implemented a clojure script module system in any clojure program?
23:50	justin_smith	crocket: no, but I don't do the kind of code where I would ever trust a user to load source files
23:50	justin_smith	well except for some hacking I did on lazybot that is
23:51	crocket	ok
23:51	crocket	justin_smith, So, you need a sand-boxed plugin environment.
23:51	justin_smith	I don't think I need one, though lazybot does have one (had one before I worked on it)
23:51	justin_smith	I don't need users to load code at all ideally
23:52	crocket	justin_smith, hexchat has a plugin system.
23:52	crocket	It would be fascinating to add clojure scripting capability to hexchat.
23:52	crocket	Although hexchat is written in C or C++.
23:54	justin_smith	so you also need to load a jvm...
23:54	crocket	I'll probably try to embed pixie.
23:55	crocket	Pixie is clojure on native platforms.
23:55	crocket	It is close to clojure.