#clojure – 2015-06-02

2015-06-02

00:15	dumptruckman	hmm
00:19	dumptruckman	how about combining seqs contained in different maps under the same key?
00:19	currentoor	has anyone here used lobos for migrations?
00:21	dumptruckman	like a merge-with but only for a specific key
04:49	ollivera	Him how can I get the component name from the structure below?
04:49	ollivera	{"id" : "1", "versions" : [ { "news" : [ {"id" : 3, "parameters" : { "component" : "myNameHere" } }]}]}
04:51	SagiCZ	,(-> {"id" : "1", "versions" : [ { "news" : [ {"id" : 3, "parameters" : { "component" : "myNameHere" } }]}]} "versions" first "news" first "parameters" "component")
04:51	clojurebot	#<RuntimeException java.lang.RuntimeException: Invalid token: :>
04:51	mnngfltg	Help! When I type in "(str (java.util.Locale/getDefault))" in a pristine `lein repl`, I get "en_MT"
04:52	mnngfltg	I'm not in Malta though. Does anyone see the same?
04:52	mnngfltg	,(str (java.util.Locale/getDefault))
04:52	clojurebot	"en_US"
04:52	SagiCZ	ollivera: what kind of structure is it? is that string?
04:53	SagiCZ	mnngfltg: i think this is taken from JVM properties
04:53	mnngfltg	I tried this: -Duser.language=de -Duser.country=DE (or en resp. US)
04:53	ollivera	SagiCZ: (get-in page-name [:versions 1 :news 1 :parameters :component]) works ... but I specified the indexes (1) ... it should be able to find all ocorrences in the nested arrays
04:54	mnngfltg	but it doesn't help (I used the :jvm-opts key in project.clj)
04:56	kwladyka	i am writing short article to help people choose template library for web. Answer for this question will help me be more objective: Who use Enlive? Why you use Enlive instead Selmer?
05:01	ollivera	SagiCZ: what I want to do is walk thought all versions and news, not only the first. My example only had one to simplify the structure
05:01	SagiCZ	this just isnt a valid clojure map {"id" : "1", "versions" : [ { "news" : [ {"id" : 3, "parameters" : { "component" : "myNameHere" } }]}]} .. so i was asking what datatype it is
05:02	oddcully	smells like json
05:02	SagiCZ	yeah.. so if it is JSON.. get a JSON parser.. dont do it manually
05:02	SagiCZ	I loved the Jackson library for java im sure there is something for clojure too
05:12	stain	mnngfltg: unix? Try running "locale" in the shell to see what your LANG is
05:12	mnngfltg	stain: LANG=en_US.UTF-8
05:14	stain	mnngfltg: hm, I get en_US if I set such a LANG with OpenJDK 1.8.0_45-internal
05:14	mnngfltg	stain, I now see that the strange behavior disappears when I get rid of my ~/.lein/profiles.clj
05:14	stain	mnngfltg: I guess you'll just have to pack up and move to Malta! I think it's actually quite nice there.. :)
05:15	mnngfltg	stain, I'd love to, believe me :)
05:19	mnngfltg	Wow! If I add [cider/cider-nrepl "0.9.0-SNAPSHOT"] to an empty profiles.clj, it relocates me to Malta.
05:23	mbuf	are there any performance benchmarks available for Clojure?
05:24	mnngfltg	mbuf, compare to other languages you mean?
05:24	mbuf	mnngfltg, yes, I have seen the alioth one already
05:24	mbuf	mnngfltg, at least with C
05:25	mnngfltg	mbuf, well it compiles to java bytecode, so it could be similar to java in the best case
05:25	mbuf	mnngfltg, I see
05:26	SagiCZ	it is quite a bit slower than java in most cases
05:26	SagiCZ	since you've got immutable collections
05:27	mbuf	SagiCZ, I see
05:28	SagiCZ	but then again you could design your application in a more efficient way with functional programming.. using lazy sequences and all that.. so in the end it could actually be faster then traditional java design
05:28	stain	it is like comparing apples and oranges
05:28	stain	exactly.. you should not compare how fast you can iterate over a billion integers
05:28	mbuf	SagiCZ, stain I get the picture
05:29	stain	however those kind of algorithms can be made insanely fast also with clojure and the odd type hint
05:30	stain	building with immutable datastructures also makes it so much easier to parallelize a clojure app, while in Java you have to go through everything like a tax inspector to see where it could fall over
05:31	SagiCZ	stain, to be honest, its not as easy as slapping pmap wherever you have a map.. you do have to think about it a bit
05:31	mbuf	okay
05:32	mnngfltg	mbuf, I'd say it's fast enough for many things, and you can always drop down to java for your inner loops if you wish
05:32	mbuf	mnngfltg, okay
05:33	SagiCZ	and Java is fast enough for anything apart from games and HFT
05:33	stain	SagiCZ: of course, unless you have one of those "embarassingly parallelizable" problems it still requires planning. What I mean is that you will more easily have put in the foundations in order to do so anyway if you do it the Clojure way
05:33	SagiCZ	stain: agreed
05:33	stain	but with Java 8 you are also getting that with Streams
05:33	stain	which I found accidentally breaks lots of the classic coding patterns
05:33	mnngfltg	there are also many optimizations you can do with Clojure -- transients, memoization, type hints, ..., and you can add them when you notice performance problems
05:33	SagiCZ	Java 8 made me really rethink if I need clojure at all and I am still not sure.. I love Java 8
05:34	SagiCZ	streams, lambdas, filters.. just fantastic additions IMO
05:35	stain	e.g. trying to populate a classical Hashmap from Stream.forEach gave me randomly missing elements as I forgot that Hashmap was not threadsafe and that I was actually using threads under the hood
05:35	stain	yeah, I think it's a great way forward.. and it's a paradigm shift for javacoders as finally you are "allowed" to write 'just functions' again
05:35	stain	I can see why they took so long
05:36	stain	as in Java 8 it's quite a substantial change all over
05:36	SagiCZ	to me the new stuff seemed very polished, useful and intuitive
05:36	stain	exactly.. it is not just thrown together like "Oh, we need lambdas, right"
05:37	stain	here's the longest Stream call I've written so far: https://github.com/apache/incubator-commonsrdf/blob/master/api/src/test/java/org/apache/commons/rdf/api/AbstractGraphTest.java#L281
05:37	stain	it does get a bit weird.. but if you read it with Clojure eyes it's quite understandable
05:37	stain	but of course the casting comes in there to ruing everything :)
05:39	SagiCZ	i think the code is pretty readable.. also you can always split .. and you can define your lambdas as variables to name them (self-doc) and later combine them etc
05:39	SagiCZ	i do this with filter lambdas that I use more than once in a class
05:40	stain	exactly, just introducing some names.. like in Java's lambda you have to give a name to the lambda parameters, but don't need to say their type. That is quite neat, and also has a nice step-up from the for-each syntax.
05:41	TEttinger	SagiCZ, java's fast enough for many games too, since everything just calls into OpenGL anyway
05:42	TEttinger	and since games are typically long-running, JIT can kick in
05:42	SagiCZ	TEttinger: I know.. just didnt want to complicate the argument
05:42	wasamasa	the question is of course whether the programmer will not screw up when making the game :P
05:43	TEttinger	yeah, I think the main issue with java is that you don't know if end users have a JVM anymore. stuff like Packr helps with that
05:43	wasamasa	so far I've seen only one that didn't go all bonkers, nullpomino
05:43	oddcully	wasamasa: s/game/program/ fixed it
05:43	wasamasa	and ran wonderfully on a netbook
05:44	SagiCZ	TEttinger: I wished Microsoft packed JVM to regular Windows updates as is done with .NET framework
05:44	SagiCZ	s/wished/wish
05:44	stain	what I have not tried yet in Java 8 is to try to make my own functional interfaces outside Streams. That is still just flows much more naturally in Clojure, while in Java 8 you have to think a bit about it (and be inspired by Stream) to do it right, and not just build a light-weight Inversion of Control pattern
05:44	TEttinger	SagiCZ, you don't even know if the end users have windows update
05:44	TEttinger	some people running win7 have windows update permanently turned off (pirates, probably)
05:45	stain	I've used install4j which bundles whatever JDK you want for any OS
05:45	TEttinger	yeah, I use Packr for the same thing
05:45	TEttinger	you don't need a mac to make a mac app, etc.
05:45	SagiCZ	TEttinger: Well you don't even know if the end users have a computer.. what kind of argument is that?
05:46	TEttinger	stain and I are talking about bundling the VM with the app
05:46	TEttinger	which works pretty wel
05:46	TEttinger	l
05:46	TEttinger	it's better when the VM is tiny, like for Lua
05:46	oddcully	TEttinger: libgdx packr?
05:46	TEttinger	yes
05:46	oddcully	this working well?
05:46	clojurebot	Titim gan éirí ort.
05:46	TEttinger	I made lein-packr too
05:46	TEttinger	try it out maybe?
05:47	TEttinger	https://github.com/tommyettinger/lein-packr
05:47	TEttinger	lein-packr only works for 32-bit windows, 64-bit linux, and 64-bit mac
05:47	oddcully	i fooled around with libgdx and groovy some time ago. and i came by that, as i thought halfway (?) is using it
05:47	stain	TEttinger: ah, good to know I am not the only one relying on alexkasko's OpenJDK builds :)
05:48	TEttinger	stain: I'd encourage switching to Zulu soon
05:48	TEttinger	more recent packr works with linux 32 bit as well, but breaks the passing of VM args to clojure and scala apps
05:48	TEttinger	which is weird
05:49	TEttinger	if you do lein uberjar, and try to run the jar the way packr 1.3 does, it will always fail
05:49	wasamasa	hotspot, why do you keep gobbling my RAM
05:49	stain	TEttinger: ok, well, in fact we have to switch to Oracle JRE for some strange reason.. as our project moved to Apache Software Foundation which don't like GPL
05:49	stain	but commercial stuff is OK
05:49	TEttinger	but if you use packr 1.1 like I do, it works fine
05:49	TEttinger	zulu isn't actually commercial, but they have a commercial product too
05:50	TEttinger	http://www.azulsystems.com/products/zulu/downloads
05:53	stain	TEttinger: thanks for the links, I see they have docker images as well, which I appreciate
05:54	TEttinger	cool!
06:31	SagiCZ	,(require '[clojure.core.async :refer [<!! chan merge]])
06:31	clojurebot	#error {\n :cause "Could not locate clojure/core/async__init.class or clojure/core/async.clj on classpath."\n :via\n [{:type java.io.FileNotFoundException\n :message "Could not locate clojure/core/async__init.class or clojure/core/async.clj on classpath."\n :at [clojure.lang.RT load "RT.java" 449]}]\n :trace\n [[clojure.lang.RT load "RT.java" 449]\n [clojure.lang.RT load "RT.java" 412]\n [cl...
09:53	J_Arcane	This might be helpful to someone as dense as me: https://github.com/jarcane/multipage-reagent
10:10	istate	yea.. true.. css alwas gets so messykkkllkkkjjjkkkkkkjclo
10:58	fourq	Does Clojure/conj have a location yet or still TBD? (Nashville please)
11:37	damian_	Hello. Is anyone familiar with using hiphip library?
11:39	damian_	I'm trying to use dot-product function (https://gist.githubusercontent.com/w01fe/5963993/raw/hiphip_dot_product.clj)
11:41	damian_	Yet input: (dbl/dot-product (1 2) (1 2)) gives me error: ClassCastException java.lang.Long cannot be cast to clojure.lang.IFn
11:41	oddcully	damian_: this would call 1 as fn
11:42	oddcully	damian_: '(1 2)
11:43	damian_	Oh, typo. I've already tried [1 2], '(1 2) and (1 2). Everything with the same effect
11:45	damian_	=> (dbl/dot-product '(1 2) '(1 2)) ClassCastException clojure.lang.PersistentList cannot be cast to [D
11:47	oddcully	but that's a different error
11:47	oddcully	have you tried http://conj.io/store/v1/org.clojure/clojure/1.7.0-alpha4/clj/clojure.core/double-array/
11:47	thomlawrence	seems from the docs that hiphip works with arrays
11:47	oddcully	, (.getClass (double-array 1))
11:47	clojurebot	[D
11:47	oddcully	erm
11:49	gfredericks	is there a thing for clojure.test that runs tests as files change?
11:50	thomlawrence	https://github.com/jakepearson/quickie works pretty nicely
11:50	justin_smith	gfredericks: I know there is a lein plugin for that
11:51	thomlawrence	also if you're in emacs it's reasonably easy to have a hook that runs tests in your REPL when you save
11:51	damian_	Ok, works like thaht:
11:51	damian_	=> (dbl/dot-product (double-array '(1 2)) (double-array '(2 3))) 8.0
11:52	damian_	Many thanks
11:52	oddcully	yw
11:54	gfredericks	thomlawrence: yeah emacs works fine, this is for non-emacs :)
11:54	gfredericks	thomlawrence: quickie looks good, thanks!
12:21	arav93	Hi, how does is-tc-e and is-tc-err work?
12:22	arav93	If there is anyone who is familiar with it, please help me out!
12:22	arav93	:)
12:25	justin_smith	arav93: do you want to know how it is implemented or how to use it? the implementation seems simple enough https://crossclj.info/ns/org.clojure/core.typed/0.3.0-alpha4/clojure.core.typed.test.test-utils.html#_is-tc-e
12:26	arav93	I want to know how it is used justin_smith
12:27	justin_smith	arav93: it's meant to be called in a deftest, using clojure.test
12:27	justin_smith	as a replacement for clojure.test/is
12:28	arav93	Oh ok
12:28	justin_smith	arav93: sadly I can't point to a good example - the reason that's a crossclj.info link is I intended to point out how some project was using it in their tests, but no project followed by crossclj.info is using it
12:29	arav93	It's ok, thanks for your help anyways justin_smith :)
12:29	justin_smith	I should qualify what I said a bit - it isn't a general replacement for test/is - it's a variant that simply tests if something is properly / improperly typed
12:43	Shayanjm	I'm trying to export a large list of maps to csv. Here's what i've got so far: https://gist.github.com/shayanjm/5cc95e71a3f3492084e6
12:43	Shayanjm	in the CSV, however, it looks like the vector elements are getting quoted unnecessarily
12:44	Shayanjm	any idea how I can prevent that from happening? I'm using clojure.data.csv but couldn't find any documentation re: using the quote? predicate
12:45	justin_smith	Shayanjm: csv doesn't do trees, so the compromise there is to represent the nested collection as a single string
12:46	Shayanjm	justin_smith: sure - but the inner elements are also getting double quoted, is this the expected behavior?
12:46	justin_smith	Shayanjm: one alternative would be to make a line in a separate csv for each vector, with a linked unique id
12:46	justin_smith	Shayanjm: that's the only way to represent something inside a string that should itself be a string
12:46	Shayanjm	Right, didn't think that one through
12:47	Shayanjm	is there a way to change the quote delimiter?
12:47	Shayanjm	i.e use single quote vs double for clarity?
14:25	andyf_	gfredericks: seventy-one. So ... much ... pull request ... discussion ....
14:26	andyf_	Is this performance art?
14:27	chouser	spontaneous performance art? Like a drum ciricle?
14:30	andyf_	Shoot, now I'm actually going to spend a few minutes wondering what kind of pull request to submit to that repo.
14:34	gfredericks	(inc andyf_) ;; for contributing to open source
14:35	gfredericks	andyf_: I mentioned earlier that I'd accept (defn seventy-one? [x] (= x seventy-one)) and don't think anybody's bothered yet
14:39	SagiCZ	i was thinking of adding some id to my entity objects .. (they are just maps) .. is there some mechanism in clojure core for generating random ids? i dont need zillions of them so UUID seems like an overkill
14:40	gfredericks	&(gensym) like this?
14:40	SagiCZ	something like {:name "Jack" :id "#6421" :age 45}
14:40	gfredericks	whar ar the bots!!
14:40	SagiCZ	,(gensym)
14:40	clojurebot	G__27
14:40	SagiCZ	um.. that sounds like something you would use in a macro..
14:41	andyf_	This #clojure channel log hasn't been appended to in a couple of days, probably because the bot that does it is down: http://logs.lazybot.org/irc.freenode.net/%23clojure
14:41	tbaldrid_	I often do this:
14:41	tbaldrid_	,(do (let [a (atom 0)] (defn make-id [] (swap! a inc))) (make-id))
14:41	clojurebot	1
14:42	gfredericks	,(defn make-id (partial swap! (atom 0) inc))
14:42	clojurebot	#error {\n :cause "Parameter declaration \"partial\" should be a vector"\n :via\n [{:type clojure.lang.Compiler$CompilerException\n :message "java.lang.IllegalArgumentException: Parameter declaration \"partial\" should be a vector, compiling:(NO_SOURCE_FILE:0:0)"\n :at [clojure.lang.Compiler macroexpand1 "Compiler.java" 6644]}\n {:type java.lang.IllegalArgumentException\n :message "Paramete...
14:42	SagiCZ	tbaldrid_: I see. thats something I would do too.. I was just wondering if there is some mechanism already bundled with clojure
14:42	gfredericks	,(def make-id (partial swap! (atom 0) inc))
14:42	clojurebot	#'sandbox/make-id
14:42	tbaldrid_	although you did say "random IDs" so I'm not sure what you mean by that
14:42	gfredericks	,(make-id)
14:42	clojurebot	1
14:42	tbaldrid_	ooooh partial, I like it
14:42	SagiCZ	tbaldrid_: something like UUID generator returns.. they are not sequential
14:43	amalloy	dangit i restarted lazybot recently, andyf_. why is he dead again. i blame you
14:44	tbaldrid_	SagiCZ: what do you need the randomness for?
14:44	puredanger	fourq: re your question about the conj, no location yet but unlikely to be Nashville :)
14:44	andyf_	amalloy: I must have killed it at least once some time, so accepted.
14:44	SagiCZ	tbaldrid_: I guess I don't really need it to be random.. just thought it would look better.. but as I think about it the generator would more efficient if it just inc'ed
14:45	amalloy	anyway he's back
14:45	chouser	Nashville would be fun. Or New York City, if you think they can handle the extra traffic the Conj would create.
14:45	fourq	puredanger =)
14:46	fourq	Nashville is having CodeConf here this year
14:51	SagiCZ	gfredericks: why did you use partial when you dont want to add any more arguments later when calling the make-id?
14:52	amalloy	SagiCZ: to close over (atom 0) instead of recreating it each time the function is called
14:54	SagiCZ	thanks
14:55	SagiCZ	so I could create the same thing like this?
14:55	SagiCZ	(def make-id (let [a (atom 0)] (fn [] (swap! a inc))))
14:55	amalloy	SagiCZ: that is exactly the thing tbaldrid_ described, before gfredericks proposed the partial version as an improvement
14:56	amalloy	personally i like the partial version less
14:56	tbaldridge	partial and comp make everything better ;)
14:56	SagiCZ	yeah I was just trying to rewrite it into something I understand
14:56	SagiCZ	i didnt know partial creates closure like this
14:57	amalloy	SagiCZ: it just follows naturally from the fact that partial is a function
14:57	tbaldridge	SagiCZ: the source of partial is pretty simple: https://github.com/clojure/clojure/blob/clojure-1.6.0/src/clj/clojure/core.clj#L2460
14:57	amalloy	(partial (atom 0) ...) must evaluate (atom 0) exactly once, before even calling partial
14:58	amalloy	and then the value of that (which is an atom) is used thereafter, rather than the expression being re-evaluated each time
14:58	SagiCZ	i understand
14:58	SagiCZ	thanks
15:08	SagiCZ	how could I drain a core async channel? I know "into" but it waits until the chan closes
15:08	tbaldridge	as in take as many things as you can, but don't wait for closing?
15:08	SagiCZ	yep
15:09	tbaldridge	put async/poll! in a loop
15:09	tbaldridge	but that's only in the SNAPSHOT versions of core-async
15:09	SagiCZ	yeah i dont have poll
15:09	SagiCZ	nevermind
15:09	tbaldridge	you can also use (alts! [c] :default nil)
15:09	SagiCZ	can i just put <!! in a loop?
15:09	tbaldridge	that'll block when you take the last item
15:10	SagiCZ	i see
15:11	SagiCZ	what does "alt" mean? alternative?
15:13	tbaldridge	SagiCZ: if you do this: (alts! [c1 c2]) it will take one value from one channel, or the other, but not both
15:13	tbaldridge	So it's a `select` if you're familiar with async io in C
15:13	_alejandro	SagiCZ: it's like a select (lets you receive a value among multiple channels); I imagine it is named after alternative
15:14	tbaldridge	(alts! [c] :default nil) says "take a value from c, but if there isn't one available, return nil instead)
15:14	tbaldridge	so that will either return [c val] or [:default nil] to let you know what happened.
15:14	SagiCZ	tbaldridge: well thats handy!
15:15	SagiCZ	i want to use channels for the event flow in my application.. just dont know how to avoid "over"using them.. is there anything channels are particulary bad at?
15:17	tbaldridge	yeah, they aren't exactly super fast. Not slow mind you, but there's a few locks inside of them. So don't send super small messages super fast.
15:17	tbaldridge	But besides that, not really.
15:17	_alejandro	SagiCZ: I think there's some overhead to each channel, so depending on your performance needs it could be an issue
15:17	stuartsierra	Don't mix channel operations with computation or side effects. Try to keep them separate.
15:18	tbaldridge	Also, try to keep you go blocks and channels alive. Don't create whole graphs just to throw them away.
15:18	_alejandro	SagiCZ: I think you can reduce that overhead via transducers (assuming the operations happening between channels are cheap)
15:18	tbaldridge	If you can create a static graph and flow data through it, perfect!
15:18	_alejandro	tbaldridge: would you say that's true of thread blocks too?
15:18	SagiCZ	tbaldridge: i have drawn a static graph on paper already... that will get built and initialized on start and stay that way forever
15:19	SagiCZ	however I will send small messages.. up to about 5 times a second.. is that considered too fast for channels?
15:19	tbaldridge	_alejandro: yeah, it's pretty much true of all of core.async.
15:20	tbaldridge	SagiCZ: oh no, I'm saying don't send 1million ints a second over a channel
15:20	SagiCZ	tbaldridge: oh thats alright then!
15:20	SagiCZ	and when I mult a channel.. do the values get physically copied? as in do they take up more space in memory?
15:20	tbaldridge	SagiCZ: no, nothing is copied, so use immutable data :)
15:21	SagiCZ	great
15:22	SagiCZ	why do people say that channels break immutability? or do they mean that the channel itself is mutable?
15:22	tbaldridge	SagiCZ: yes channels are mutable, hence the ! in <! and >!
15:22	SagiCZ	oh.. i thought they were excited funnels
15:26	m1dnight_	Can I apply recur?
15:26	m1dnight_	It seems like I cant? OR am I mistaking?
15:27	amalloy	m1dnight_: you can't, but you probably don't want to
15:27	amalloy	do you have an example where you think you want to?
15:27	m1dnight_	Well, i'm doing some convoluted stuff for my thesis.
15:28	m1dnight_	What I want to achieve is evaluate the arguments to recur, apply a function to them and then put them back to recur
15:28	m1dnight_	so something like (recur x y) --> (let [recurargs [x y] processed (process-args [x y])] (recur processed))
15:28	amalloy	m1dnight_: the thing is, you always have a fixed number of arguments at a recur point, so applying a list doesn't really make a lot of sense
15:29	m1dnight_	I know.
15:29	m1dnight_	Just wondering how I could achieve something like that.
15:29	amalloy	you can just write (let [[x y] (process-args [x y])] (recur x y))
15:29	m1dnight_	yeah but its a macro so all I have is a list
15:30	m1dnight_	I have a walker that handles each clause that matches (= (first form) 'recur)
15:30	amalloy	you want a macro to replace the call to recur?
15:30	m1dnight_	yeah, I have a macro that allows the user to use recur, and inside that macro I want to process the arguments to recur.
15:30	m1dnight_	Not sure if im conveying what I want to achieve
15:30	amalloy	m1dnight_: sure, so you have a list like '(recur (f x) (g y))
15:31	m1dnight_	derp
15:31	m1dnight_	why didnt I think of that lol
15:31	m1dnight_	oh wait.
15:31	m1dnight_	but suppose I have the original form (recur x y z)
15:31	amalloy	that's my point, that's the list you already have
15:31	amalloy	and it's not hard to transform that into the list '(let [[x# y#] (process [(f x) (g y)])] (recur x# y#))
15:31	m1dnight_	I want to pass x, y, and z as 1 parameter to a function. So I have to pass them as a list/array and I can only return a list/array.
15:32	m1dnight_	And then im stuck in applying recur to those arguments.
15:33	amalloy	i feel like you're not hearing what i'm saying. what i'm saying is, you have a list already, which has recur as its first element
15:33	amalloy	and you want to transform it into another list, which looks like (let [...] (recur ...))
15:33	amalloy	looking like the most recent snippet i posted
15:33	m1dnight_	ooohhhh
15:33	amalloy	and that is not a difficult transformation to do, so you can just do it
15:33	m1dnight_	right, now im getting it
15:33	m1dnight_	right, right, right :)
15:34	m1dnight_	Haha, sorry I was a bit slow on that one.
15:34	m1dnight_	Thanks amalloy
15:34	m1dnight_	(inc amalloy)
15:34	lazybot	⇒ 276
15:35	amalloy	(defmacro silly-recur [& args] (let [syms (map (fn [_] (gensym)) args)] `(let [~@syms (process [~@args])] (recur ~@syms))))
15:35	amalloy	something like that, anyway. i haven't tested it, just typed it into irc
15:37	amalloy	where you won't actually define silly-recur as a macro, but use that logic in whatever weird code-walker you already have
15:37	m1dnight_	hehe, weird indeed :)
15:37	m1dnight_	I think i got it working amalloy
15:37	m1dnight_	thanks for the patience
15:39	SagiCZ	whats the thing one should use when one wants to "map" over seq but ignore the result?
15:39	SagiCZ	doseq?
15:39	clojurebot	doseq is like for, but for side effects instead of values
15:39	SagiCZ	haha I dont even need humans!
15:40	amalloy	#clojure is finally fully-automated
15:40	SagiCZ	:D
15:40	andyf_	for?
15:40	clojurebot	for is awesome
15:41	SagiCZ	very helpful
15:41	SagiCZ	(inc clojurebot)
15:41	lazybot	⇒ 51
15:41	adereth	(inc clojurebot)
15:41	lazybot	⇒ 52
15:41	andyf_	I was wondering whether it would respond "for is like dose, but for values instead of side effects" :)
15:42	amalloy	there are a few examples of corecursion in clojurebot's factoid list, but i don't remember where they are
15:59	justin_smith	~corecursion
15:59	clojurebot	I don't understand.
15:59	justin_smith	~corecursion is a definition cycle
15:59	clojurebot	A nod, you know, is as good as a wink to a blind horse.
15:59	justin_smith	~definition cycle is a corecursion
15:59	clojurebot	A nod, you know, is as good as a wink to a blind horse.
15:59	SagiCZ	~SagiCZ
15:59	clojurebot	No entiendo
16:00	tmtwd	~( + 32 32)
16:00	clojurebot	No entiendo
16:01	tmtwd	(inc 2)
16:01	lazybot	⇒ 3
16:01	tmtwd	what is the whole point of ~
16:01	tmtwd	?
16:01	SagiCZ	~doseq
16:01	clojurebot	doseq is like for, but for side effects instead of values
16:01	SagiCZ	~clojurebot
16:01	justin_smith	tmtwd: it invokes clojurebot's factoid functionality
16:01	clojurebot	clojurebot has a poetic soul
16:02	justin_smith	tmtwd: which is distinct from its clojure evaluation
16:02	tmtwd	oh
16:05	tmtwd	test
16:09	creese	I'm using rabbitmq and core.async. Does anyone know what this exception means? "java.lang.AssertionError: Assert failed: No more than 1024 pending puts are allowed on a single channel. Consider using a windowed buffer."
16:09	creese	https://gist.github.com/creese/7008cb444a042b894fa9 <— full stack trace
16:10	tbaldridge	creese: yes
16:10	tbaldridge	do you have a copy of the code?
16:10	amalloy	it means you are putting a zillion things into a channel and not reading them out
16:10	tbaldridge	it's more nuanced than that'
16:11	tbaldridge	you have more than 1024 things parking on a channel. You can have as many things as you want in a channel as long as you give it a buffer
16:11	tbaldridge	So either you're spining up more than 1024 go blocks and they're all trying to >! onto the channel
16:11	amalloy	tbaldridge: in that it suggests there are a zillion different go blocks also?
16:11	tbaldridge	or you're using put! without respecting backpressure
16:15	SagiCZ	calling mult multiple times on the same channel returns different mults?
16:15	creese	tbaldridge: Here's a code snippet. LMK if you need more. https://gist.github.com/creese/063193bd3b6fce1ae480
16:17	m1dnight_	amalloy: could you have a look at my macro? Im still nog getting it right.
16:17	hiredman	what is there to say? you are put!'ing things in to a channel as fast as you can as they come off rabbit, without waiting waiting for the consumer on the other end of the channel
16:17	amalloy	hiredman: better than that, there isn't even a consumer afaict
16:18	creese	there is
16:18	SagiCZ	does calling mult multiple times on the same channel returns different mults?
16:18	hiredman	creese: so stop doing that
16:19	m1dnight_	I dont understand quite yet how I can expand a list that is bound to a symbol defined inside my `(..) expression
16:19	creese	https://gist.github.com/creese/063193bd3b6fce1ae480 <— I've updated this with the code for the consumer
16:19	amalloy	m1dnight_: sure, i guess. have you tried just copying the one i gave, and fixing the [] i forgot to put in, though?
16:19	tbaldridge	creese: hiredman is right. put a callback at the end of the call to put!
16:20	m1dnight_	yeah, well based on that one though
16:20	hiredman	or use the blocking version of put
16:21	tbaldridge	yeah, or that
16:21	hiredman	(if however whatever rabbit library you are using is ok with you blocking the handler thread)
16:21	m1dnight_	hld on, its rather small
16:21	m1dnight_	https://www.refheap.com/102029
16:21	m1dnight_	this is what I have so far
16:22	m1dnight_	And now I get the rror that long can not be cast to fn, so it's probably evaluating the res#, instead of interpreting it as a list. So all I have to do now is expand it and wrap it in a seq (to prepend to it)
16:22	m1dnight_	But i cant figure it out.
16:22	m1dnight_	Macro tutorials are not really elaborate about it either.
16:23	m1dnight_	brb doorbell
16:23	amalloy	line 10 is just total gobbledegook
16:24	amalloy	honestly just replace it with something that looks exactly like the paste i gave you: (let [syms (map (fn [_] (gensym)) recur-args)] `(let [[~@syms] (process [~@recur-args])] (recur ~@syms))))
16:26	m1dnight_	okay ill give it a shot
16:27	amalloy	that is, replace lines 9 and 10 with that
16:31	m1dnight_	right right right right
16:32	m1dnight_	now I get it, the part with the gensyms is the trick i didnt get
16:32	m1dnight_	thanks amalloy
16:32	m1dnight_	(inc amalloy) and again!
16:33	creese	hiredman: thanks, I'll try the blocking put
16:34	m1dnight_	finally :) thanks man, realy
16:34	m1dnight_	really*
16:34	tbaldridge	creese: be sure to read the specs to make sure your Rabbit library won't freak out if you block the callback thread
16:39	SagiCZ	so this is the graph I want to build with channels https://i.imgur.com/4rSQS1d.png .. so far I have this https://www.refheap.com/102030 .. am I doing something completely wrong? I am kind of thrown off by all the options core.async has.. not sure if I should use pipes, pipelines, transducers and what-nots.. this seems to work as I expected
16:42	SagiCZ	i have just the first two levels of course
16:42	donbonifacio	I have a service that boots in 5s (aot), if I add javaagent:newrelic, it takes 23s. Anywone knows if I can make this better?
16:45	tbaldrid_	dogonthehorizon: sounds like a question for newrelic
16:47	donbonifacio	true
16:48	SagiCZ	~am I here?
16:48	clojurebot	I don't understand.
16:48	SagiCZ	ok
17:04	Seylerius	If the listener function on a GUI button takes a bunch of GUI data, passes it through a parser and a solver, and gets a set of solutions back that I want to move around through using a slider, what's the best place to put the vector of solutions?
17:04	SagiCZ	local variable?
17:05	Seylerius	SagiCZ: Wouldn't that be local to the listener function?
17:05	SagiCZ	it would
17:05	SagiCZ	but the computation should be on a non GUI thread anyways
17:05	Seylerius	I need the button's listener function to stash the vector of solutions somewhere that the slider's listener function can get at it.
17:06	Seylerius	Because when the slider gets slid, it needs to display a different solution.
17:07	Seylerius	SagiCZ: I don't want to stick it in a global...
17:07	SagiCZ	i understand that
17:08	SagiCZ	you could close over the listener function though
17:08	Seylerius	Hmm... Since the slider doesn't appear until after the solver's done solving, the solve-button's listener function could create the slider's listener function.
17:08	Seylerius	SagiCZ: Example?
17:10	SagiCZ	what gui framework are you using?
17:14	Seylerius	SagiCZ: Seesaw
17:14	SagiCZ	yeah seesaw has a binding api if I recall correctly.. so maybe you could bind the solution vector to the slider?
17:17	Seylerius	SagiCZ: That's gonna be a negatory. A combobox will do it, but a slider just does numbers.
17:17	SagiCZ	umm.. i thought you could do very custom bindings.. but maybe its mixing up with my JavaFX experience
17:20	Seylerius	If I use fn, then any variables in scope when I do that are available, right?
17:20	Seylerius	Actually, easy test:
17:20	SagiCZ	yes.. thats called "closure" or "closing over fn"
17:20	Seylerius	Thought so.
17:21	SagiCZ	it usually solves those problems but unfortunetely my clojure is very rusty so i cant throw in an example that would solve your problem
17:21	Seylerius	That's clear enough, though, so I can work with it. Thanks.
17:21	Seylerius	,(let [foo "foo"] (map #(str foo %) (range 3)))
17:21	clojurebot	("foo0" "foo1" "foo2")
17:21	Seylerius	Yep
17:23	marthall	Hello everyone!
17:24	Seylerius	Hello marthall
17:24	SagiCZ	hi
17:25	marthall	I'm a beginner in clojure, and I'm trying to update a variable inside a loop. Of course this is not working, as I'm familiar with the immutability: I think this gist explains my problem, but I can't find a good solution. Any tips? https://gist.github.com/marthall/5b09e3b2c1a07dd41d3d
17:25	SagiCZ	marthall: taking a look
17:26	marthall	Thank you SagiCZ
17:27	SagiCZ	marthall: I think you want reduce and not doseq.. reduce goes through a sequence computing something from accumulated value and the next value in sequence finally producing one result (your input)
17:27	SagiCZ	reduce?
17:27	clojurebot	reduce accumulates the men from the boys
17:27	SagiCZ	~reduce
17:27	clojurebot	reduce accumulates the men from the boys
17:27	m1dnight_	:D :D :D
17:27	SagiCZ	so helpful
17:27	m1dnight_	what do you want to know SagiCZ ?
17:28	SagiCZ	(doc reduce)
17:28	clojurebot	"([f coll] [f val coll]); f should be a function of 2 arguments. If val is not supplied, returns the result of applying f to the first 2 items in coll, then applying f to that result and the 3rd item, etc. If coll contains no items, f must accept no arguments as well, and reduce returns the result of calling f with no arguments. If coll has only 1 item, it is returned and f is not called. If val is supplied, returns the result of appl
17:28	SagiCZ	i just wanted to show the doc for marthall
17:28	m1dnight_	oh
17:29	marthall	Thanks alot SagiCZ. I've used reduce in python, and thought that was the one, but I was not sure. I'll look further into it :)
17:30	amalloy	marthall: you want (reduce (fn [input [w b]] (sigmoid ...)) input (map vector ...))
17:30	SagiCZ	marthall: more imperative solution would be to use loop and update your input var via "recur".. something like
17:30	SagiCZ	(loop [[w b] coll, input input] ... (recur (next coll) (sigmoid (+ (dot w input) b)))
17:31	SagiCZ	but yeah.. its a classic reduce problem
17:31	amalloy	SagiCZ: not quite: you'd need [[w b]] coll, at least. it's still hard to detect when coll is empty, though, which is one reason reduce is nicer
17:32	SagiCZ	,(not (seq []))
17:32	clojurebot	true
17:32	SagiCZ	,(empty? [])
17:32	clojurebot	true
17:32	amalloy	SagiCZ: uh huh, but my point is you never actually have a coll to call seq on, in the snippet you laid out
17:33	amalloy	you just have w and b
17:33	SagiCZ	amalloy: you are right.. sorry
17:33	SagiCZ	you would need another var to keep the coll in
17:34	marthall	amalloy & SagiCZ: Thanks guys, I'll give it a shot and come back if I fail. This is my first time in this channel, and I have to say I'm astonished by how helpful you are!
17:34	SagiCZ	marthall: as was I my first time here.. this channel is nothing like other channels on freenode
17:36	SagiCZ	m1dnight_: oh yes.. very much that.
17:36	m1dnight_	friendly bunch in here <3 :>
17:39	uptown	oh yeah? let's put that to the test haha. i'm using boot, and thus defclifn in my app, which is made up of system/components. What's the best way for compponents to supply their own defclifn option definitions and for the top scope to aggregate them?
17:40	m1dnight_	Id help, but I have no idea what any of those things are :p
17:40	uptown	you're excused
17:43	justin_smith	uptown: so things that are initialized by the component system need to be able to provide configuration to boot?
17:44	uptown	justin_smith: it would be DRY-er that way
17:45	SagiCZ	[[:a 0] [:b 3]] -> {:b 3, :a 0} ?
17:46	justin_smith	SagiCZ: ##(into {} [[:a 0] [:b 3]])
17:46	lazybot	⇒ {:a 0, :b 3}
17:47	SagiCZ	thank you
17:47	justin_smith	np
17:59	alexyakushev	Bronsa: Hello, can I still ask you that classloader question?
18:20	sdegutis	Given two collections of items with some overlap, is there a way to tell how many of one collection are in the other?
18:21	sdegutis	(f #{1 2 3} #{2 3 4 5}) => 2
18:21	sdegutis	What's f?
18:21	SagiCZ	,(count (intersection #{1 2 3} #{2 3 4 5}))
18:21	clojurebot	#error {\n :cause "Unable to resolve symbol: intersection in this context"\n :via\n [{:type clojure.lang.Compiler$CompilerException\n :message "java.lang.RuntimeException: Unable to resolve symbol: intersection in this context, compiling:(NO_SOURCE_PATH:0:0)"\n :at [clojure.lang.Compiler analyze "Compiler.java" 6543]}\n {:type java.lang.RuntimeException\n :message "Unable to resolve symbol:...
18:21	sdegutis	Nice, thanks.
18:22	SagiCZ	its in clojure.set
18:23	amalloy	sdegutis: (comp count filter) works too
18:24	sdegutis	Neat.
18:35	sdegutis	amalloy: your way is so cool
18:35	sdegutis	it's almost abusive
18:35	sdegutis	(in the original, non-evil sense of the word)
19:31	andyf_	Any reference to the original, non-evil sense of the word "abusive"? Never heard of that.
19:47	Seylerius	Somehow, this code (http://sprunge.us/MDEa) is giving me "IllegalArgumentException Don't know how to create ISeq from: cube_sudoku_solver.core$gui_grid_box$fn__7607 clojure.lang.RT.seqFrom (RT.java:528)"
19:49	andyf_	Seylerius: A stack trace from (clojure.repl/pst *e) done immediately after the exception occurs could contain function names and line numbers that might help narrow down where your code was last involved.
19:49	Seylerius	andyf_: Coming up.
19:50	Seylerius	Stack trace from cider: http://sprunge.us/GMcJ
19:52	andyf_	The part where you do (map gui-square #(->> % ...)) looks suspicious. gui-square does not expect to take a function, does it?
19:52	andyf_	Maybe #(->> % ...) should be (->> % ...) instead?
19:53	Seylerius	andyf_: I might be missing another map...
19:54	andyf_	This is not the problem, but this: (#(quot % 3) (dec num)) is more clearly written as this: (quot (dec num) 3)
19:54	Seylerius	Or... drop gui-square at the bottom of the ->>
19:58	amalloy	yeah the problem is definitely that (map gui-square f xs) line, but it's not totally clear what the actual fix is because it's hard to see what you're trying to d
20:21	Seylerius	Okay, this is my GUI setup function (http://sprunge.us/MDPi), but although the GUI is getting setup, the listeners do not seem to be firing.
20:23	mrcheeks	Seylerius:Is it some kind of toolkit such as seesaw vs pure swing?
20:23	Seylerius	mrcheeks: Seesaw.
20:24	amalloy	~map
20:24	clojurebot	map is slightly retarded
20:24	amalloy	well. close enough, i guess
20:24	amalloy	Seylerius: map is lazy
20:25	amalloy	your listener function just returns a lazy sequence, and realizes zero elements of that sequence
20:25	gfredericks	clojurebot: forget map \|is\| slightly retarded
20:25	clojurebot	I forgot that map is slightly retarded
20:25	Seylerius	amalloy: Huh. But why isn't the mode-switch listener firing?
20:26	Seylerius	The line that starts (sc/listen mode-group selection ...)
20:26	amalloy	i dunno. i don't use seesaw, and i don't want to read that whole giant snippet. i just scrolled to the bottom and found one thing that was obviously wrong
20:27	Seylerius	amalloy: Well, thanks for that one. I swapped it for a mapv, to force it to complete immediately.
20:27	Seylerius	amalloy: What do you use for GUIs?
20:27	amalloy	i dunno. javascript? i don't really do any
20:27	Seylerius	Gotcha.
20:28	amalloy	like a decade ago i used swing by itself in java, but since then there hasn't been much of a compelling need
20:28	mrcheeks	Seylerius:Did you try the show-events of seesaw, debugging, etc?
20:30	Seylerius	mrcheeks: No. Do you have a debugger recommendation (I'm using Emacs+cider at the moment)
20:30	mrcheeks	Seylerius: I'm not clojure developer, just an enthusiast, but looking at your code, it is easily done in plain swing...
20:30	Seylerius	mrcheeks: I don't particularly know swing, or normal java.
20:31	mrcheeks	Seylerius:I believe that Arthur Malarba implemented some kind of debugger for Cider, few months ago, likely not complete but probably usable.
20:31	wildnux	Seylerius: i get "Unable to resolve var: cider.nrepl.middleware.debug/wrap-debug in this context" when i try to use cider-debug, how do you make it work?
20:32	wildnux	I am trying to learn debugging clojure, but emacs and clojure both are new
20:32	mrcheeks	Seylerius:http://endlessparentheses.com/cider-debug-a-visual-interactive-debugger-for-clojure.html, I rarely use debuggers in general unless I'm completely clueless about what's going on after reading.
20:33	mrcheeks	Seylerius:Again, I only do Clojure for fun, my paid work is all Java and sometimes Groovy.
20:34	Seylerius	mrcheeks: Thanks for the tip. That looks helpful
20:34	Seylerius	wildnux: Are you using cider 0.8 or 0.9?
20:34	wildnux	Seylerius: [cider/cider-nrepl "0.8.2"]
20:35	Seylerius	wildnux: Take a look at the link mrcheeks gave. You want 0.9.
20:35	wildnux	Seylerius: was just looking at it
20:35	wildnux	:)
20:35	wildnux	mrcheeks: thanks a lot.. I have been scratching my head for long time
20:36	Seylerius	(inc mrcheeks)
20:36	lazybot	⇒ 1
20:39	mrcheeks	np, :-), life would be more enjoyable hacking some Clojure on daily basis with $$, all that Java, etc. is getting kind of boring. If I were a Clojure professional I'd have tried implementing a full debugger for Cider based on the previous work of Ritz (https://github.com/pallet/ritz -> JPDA)
20:41	wildnux	mrcheeks: I do java only at work, but clojure is the language I love, I am trying to be better so I can try finding clojure for next job ;)
20:42	gfredericks	monolithic macros make repl-driven development stupider
20:42	gfredericks	(M.M.M.R.D.D.S.)
20:43	it0a	a job in clojure would be so nice
20:43	mrcheeks	wildnux:nice not much Clojure happening in Canada as far as I know unless I build my own product. I'm "die hard" Emacs user, but maybe Cursive for IntelliJ is free, I think that it has a "good enough" debugger.
20:43	it0a	also sick of the day in/day out java nonsense
20:44	it0a	~_~
20:44	clojurebot	No entiendo
20:44	TEttinger	it is unintended, yes
20:44	it0a	haha
20:44	TEttinger	$seen damian_
20:44	lazybot	I have never seen damian_.
20:45	TEttinger	what...
20:45	TEttinger	just this morning, [08:41;33] <damian_> Yet input: (dbl/dot-product (1 2) (1 2)) gives me error: ClassCastException java.lang.Long cannot be cast to clojure.lang.IFn
20:45	TimMc	it0a: It is indeed pretty nice!
20:46	it0a	TimMc: so envious :P
20:46	TimMc	functionaljobs.com has Clojure positions here and there
20:46	TEttinger	TimMc, do you have a webslinging development job, or something more unusual?
20:47	TimMc	Web servers, yeah.
20:47	TEttinger	(I'd consider something like clojure backends for websites or clojurescript frontends to be the most common use?)
20:47	TimMc	A tiny bit of front end, a little Java here and there.
20:48	TEttinger	with more traditional lisp stuff like AI or other learning algorithm stuff probably being rare, but that's what Prismatic does, kinda
20:48	TimMc	Right now I'm on a non-Clojure project but I hope to be back in it in a month or so.
20:48	TEttinger	man, could Prismatic have picked a worse time to choose a name with PRISM in it for their data collection/recommendation service
20:48	Seylerius	TEttinger: You mess around with seesaw much?
20:49	TEttinger	yeah, a bit
20:49	Seylerius	My listeners are deaf.
20:49	TEttinger	not in a while
20:49	TimMc	TEttinger: Or a BETTER time? :-D
20:49	TEttinger	dun dun DUN
20:49	m1dnight_	do watched and atoms get recycled once they are out of scope?
20:49	Seylerius	Heh
20:49	m1dnight_	watches*
20:50	m1dnight_	s/are out of scope/you leav their defining scope/
20:50	TEttinger	m1dnight_, I'd hope so, they are internally handled by java objects and java objects are garbage collected...
20:50	amalloy	m1dnight_: objects get garbage collected when there is no longer a path to them from a GC root (ie, a class's static members or a stack frame's local variables)
20:50	m1dnight_	okay then :)
20:50	amalloy	this applies to atoms as much as to anything else
20:50	m1dnight_	I was just wondering about the watchers in particular.
20:50	amalloy	watchers are just objects pointed at by the atom
20:50	m1dnight_	oh okay
20:51	Seylerius	TEttinger: Mind taking a look at this function (obviously it creates my GUI crap), and see if you can spot why the listeners refuse to listen? I've aliased seesaw/core to sc. http://sprunge.us/MDPi
20:51	TEttinger	sure, Seylerius
20:51	Seylerius	TEttinger: Thanks. What do you normally use for GUIs in clojure these days?
20:52	Seylerius	I'm quite certain the listener functions aren't actually getting called, because I've stuck a println in a couple and never see an output. A println before or after gets called, though, so the sc/listen lines are getting eval'd.
20:53	amalloy	Seylerius: printlns might go to a different stream than you expect, if they're being run from the swing dispatch thread
20:53	amalloy	try looking in your cider-nrepl buffer or whatever it's called
20:54	Seylerius	amalloy: Yeah, that's where I'm looking. I've stuck a println right before and after the listener functions, and I see those outputs, but I never see the ones _inside_ the listeners.
20:54	TEttinger	Seylerius, it looks like you aren't ever adding stuff to the frame
20:55	TEttinger	are the buttons appearing?
20:55	Seylerius	TEttinger: Yeah, everything gets drawn right.
20:55	TEttinger	hm
20:55	Seylerius	TEttinger: Want the whole thing to try running it?
20:55	TEttinger	oh, nvm :content main-panel
20:55	Seylerius	TEttinger: Yep
20:55	TEttinger	nah, I'll keep looking at this for now
20:55	Seylerius	Kay, thanks.
20:56	TEttinger	I'm pretty sure I see something off
20:56	amalloy	Seylerius: i mean not your repl buffer, but the one that contains debug output from cider itself. in slime/swank that buffer was called swank; i'm not sure what it is in cider
20:58	Seylerius	amalloy: Nope.
21:07	TEttinger	Seylerius: so there's some examples in the tests, and they really look the same as your listen calls. https://github.com/daveray/seesaw/blob/develop/test/seesaw/test/event.clj#L110
21:08	TEttinger	oh!
21:08	TEttinger	there's a thing, Seylerius
21:08	TEttinger	your reset button should use doseq because its goal is to cause side effects, instead of using map
21:09	TEttinger	(at the bottom)
21:11	TEttinger	so I'm guessing with that being lazy, and the other listeners using when-let and possibly always getting nil in the binding, it's never getting to the bodies of the listeners
21:13	Seylerius	Hmm...
21:13	TEttinger	Seylerius: try using let instead of when-let and when you would get a value, insert some debug code to see if you got nil (like a case that handles nil in the first listen)
21:14	TEttinger	after :3d
21:14	Seylerius	TEttinger: Will do.
21:14	Seylerius	TEttinger: Simply returning nil oughta do for the nil cases, right?
21:15	TEttinger	I would print, which would return nil anyway
21:15	TEttinger	that way you can see what it's getting
21:16	TEttinger	it's been weird, I built up some experience with some kinda uncommon libraries when I was working on clojure games using some odd choices of library. in the last 24 hours, hiphip has been mentioned, Packr I managed to save someone's bacon, and now Seesaw is coming into play...
21:16	TEttinger	I hadn't thought about seesaw in like a year
21:17	m1dnight_	i recall that a few days/hours ago somebody was talking about a diff function for maps, am I right?
21:18	m1dnight_	aha got it!
21:19	Seylerius	TEttinger: What are you using for GUI work these days?
21:19	Seylerius	If not seesaw?
21:19	TEttinger	I haven't done GUI work recently, when I do graphics stuff it's for games, using (very indirectly) OpenGL through many layers of nice wrappers
21:20	TEttinger	so I intended to use play-clj with a game, and use a java lib for certain aspects of the logic, things that are very array-heavy
21:21	TEttinger	I ended up just expanding on the java lib like mad
21:21	Seylerius	Wow
21:21	TEttinger	I'm still going to use clojure eventually with it
21:21	TEttinger	play-clj is really nice
21:22	TEttinger	relatively idiomatic clojure style that can do fancy stuff that's really verbose with libGDX (the library it wraps, which in turn makes OpenGL easy to use, relatively, from java)
21:23	Seylerius	TEttinger: That's interesting. I'll have to check that out...
21:23	Seylerius	What kind of game are/were you working on?
21:24	Seylerius	Also, I've swapped all the when-lets for lets, and the map for a mapv (to avoid laziness), but it's still not doing anything.
21:29	Seylerius	TEttinger: Hrm. Swapping when-let for let across the listeners didn't work, and swapping map for mapv didn't either. Nothing's getting called.
21:29	Seylerius	Oh, wait...
21:30	Seylerius	AHAH!
21:30	Seylerius	We have a useful error now!
21:31	Seylerius	TEttinger: Error output: http://sprunge.us/bgjX
21:31	Seylerius	The mode listener is what's failing.
21:33	TEttinger	ah cool!
21:33	TEttinger	Seylerius, sorry I was away, eating chinese food (it was good!)
21:33	Seylerius	Sounds good.
21:35	TEttinger	so the mode listener, that's (sc/listen mode-group :selection ...
21:36	Seylerius	TEttinger: Yep
21:36	TEttinger	it's selecting a widget rather than its value
21:37	TEttinger	you want to try to get the :id of the widget, with some sensible default if that fails
21:37	TEttinger	like (get s :id (println "this returns nil so don't use the result"))
21:38	TEttinger	then if whatever that returns is non-nil, you have :2d or :3d
21:40	Seylerius	TEttinger: Okay, now I'm getting two annoyances. One old (it takes two clicks to select a radio button), and one new ("Wrong number of args passed to keyowrd: :3d").
21:40	TEttinger	are you using a keyword as a function?
21:41	TEttinger	,(:a {:a 1 :b 2})
21:41	clojurebot	1
21:41	TEttinger	,(:c {:a 1 :b 2})
21:41	clojurebot	nil
21:41	TEttinger	,(:c {:a 1 :b 2} :default)
21:41	clojurebot	:default
21:41	Seylerius	Not meaning to, but I think it's trying to in the listener.
21:41	clojurebot	Gabh mo leithscéal?
21:41	TEttinger	can you sprunge up the code again?
21:42	xeqi	Seylerius: did you get your solver working?
21:42	TEttinger	that's this, xeqi :)
21:42	Seylerius	xeqi: Solver works great, GUI sucks balls.
21:42	xeqi	well, this is the gui for it
21:42	xeqi	haha
21:42	Seylerius	TEttinger: http://sprunge.us/jGCQ
21:43	xeqi	Seylerius: anyone recommended making all those defs into a let binding yet?
21:44	Seylerius	xeqi: Not yet, but I can see it being a good idea.
21:44	xeqi	since they're in a defn, and def in a defn will still mutate the namespace
21:44	xeqi	not just make a local definition
21:45	TEttinger	ah! (let [s (sc/id-of (sc/selection mode-group))]
21:45	TEttinger	if the selection isn't something that has an id, this could be trouble (like if it's nil)
21:46	Seylerius	TEttinger: Good catch.
21:46	TEttinger	so the body of (sc/listen mode-group :selection ... is where it's throwing the exception?
21:47	TEttinger	ah, I think I may have an idea here
21:47	TEttinger	the two clicks thing may mean you are listening to the group when you want to be listening to all the buttons, which is pretty easy to do with seesaw
21:49	Seylerius	TEttinger: Okay, that's easy enough to fix; listen to mode-buttons instead of mode-group.
21:49	TEttinger	https://github.com/daveray/seesaw/blob/develop/test/seesaw/test/event.clj#L206-L215
21:50	TEttinger	yeah, pass listen a vector of widgets, and when one has its selection change, you'll get notified, twice I think (once for one losing selection, once for gaining)
21:51	TEttinger	I think the selection is nil if a :selection event is triggered by being deselected?
21:51	TEttinger	it might not give events on deselection at all
21:51	Seylerius	TEttinger: Which is why it was a when-let binding, actually, according to the tutorial I'd looked at.
21:51	TEttinger	ahhhh
21:52	TEttinger	so going back to when-let, still getting the id, should work?
21:52	Seylerius	TEttinger: Yeah, that should do it.
21:52	TEttinger	and of course the listening to single widgets, I think that should be all for that fn...
22:00	Seylerius	TEttinger: Here's the tutorial, and I know this particular snippet worked. So this is weird. Changing to listening to the buttons themselves fixed the two click problem, though. https://gist.github.com/daveray/1441520#file-seesaw-repl-tutorial-clj-L446
22:04	Seylerius	Stepping out for food.
22:04	TEttinger	ah, that's the problem then
22:04	TEttinger	before it was listening to the group and getting a radiobutton back, and you were checking only for keywords (the :id of those radio buttons)
23:44	currentoor	I'm using the lobos library for writing migrations and lately I've had problems connecting to the DB. I keep getting the following error Attempting to call unbound fn: #'clojure.java.jdbc.deprecated/
23:44	currentoor	Anyone else deal with this?
23:45	karan	.