#clojure – 2011-07-28

2011-07-28

00:32	jcromartie	OK so I'm a little confused
00:32	jcromartie	is it: (defn name "doc string" {:stuff :map} [arg list] body)
00:32	jcromartie	or
00:32	jcromartie	(defn name "doc string" [arg list] {:stuff :map} body)
00:32	jcromartie	both work?
00:35	amalloy	jcromartie: the latter certainly won't
00:35	amalloy	it'll compile, but won't do what you want
00:36	jcromartie	hm
00:36	jcromartie	so then...
00:36	amalloy	&(macroexpand '(fn {:doc "whatever"} [] 1))
00:36	lazybot	java.lang.UnsupportedOperationException: nth not supported on this type: PersistentArrayMap
00:37	amalloy	hm. not the result i expected, but i rarely use the map syntax
00:37	amalloy	&(doc defn
00:37	lazybot	⇒ Macro ([name doc-string? attr-map? [params] body] [name doc-string? attr-map? ([params] body) + attr-map?]); Same as (def name (fn [params* ] exprs)) or (def name (fn ([params ] exprs*)+)) with any doc-string or attrs added to the var metadata ; Adjusted to (doc defn)
00:38	jcromartie	but attr-map can't reference params if it comes first
00:38	jcromartie	ah
00:38	jcromartie	http://clojure.org/special_forms
00:39	jcromartie	condition-map is separate from the attr map
00:39	jcromartie	so it's REALLY ([name doc-string? attr-map? [params] condition-map? exprs)
00:40	amalloy	mmm, not really. exprs* is passed along to fn; it's fn that has the magic for condition-map
00:42	amalloy	i mean, it's arguing about something fairly meaningless, but exprs* subsumes the arguments to fn, including condition-map
00:44	jcromartie	ah ha
00:44	jcromartie	OK good point
00:53	jcromartie	hooray for pre-conditions
01:04	jcromartie	zone achieved
01:40	Pupeno	require loads the lib and use loads the lib and makes it possible to call functions without the lib prefix, is that it?
01:49	ibdknox_	anyone from the clojurescript team still up?
01:51	kumarshantanu	Pupeno: yes
01:52	kumarshantanu	Be wary of name clashes in the case of "use" though
01:52	replaca	technomancy (or anyone else) know why clojure-jack-in would be failing with "error in process filter: Assertion failed: (keywordp module)"
01:52	Pupeno	Thanks.
02:18	kjeldahlw	replaca: Haven't seen it myself, but make sure you do not have any other swank buffers open, and that you're not using older emacs packages..
02:21	replaca	kjeldahlw: I don't, but I think it may be glomming on to some swank-contrib stuff I had from an older version. Dunno why it used to work, though
02:38	ibdknox_	BWAHAHA
02:38	ibdknox_	I have a fully functional browser repl
02:41	replaca	ibdknox_: congrats! Now what? :)
02:42	ibdknox_	replaca: haha clean it up so that other people can party on it :)
02:42	ibdknox_	replaca: and then it's time for the clojurescript client-side framework
02:43	replaca	ibdknox_: there you go. that should be a fun project.
03:31	danbell	anyone know of a markdown parser for clojure?
03:33	amalloy	danbell: surely there's one for java
03:33	danbell	yeah
03:33	danbell	I know there is
03:34	danbell	just wondering if one had somehow escaped my googling
03:40	tsdh	Hi. Can someone explain me these 2 reflection warnings? http://pastebin.com/xFuzbsFz
03:42	raek	tsdh: replace "i ^Image (.getImage img)" with "^Image i (.getImage img)"
03:44	tsdh	raek: That doesn't make a difference.
03:45	tsdh	raek: Even hinting the calls directly, e.g., (int (* @scale (.getWidth ^Image i))), won't get rid of the warnings...
03:46	tsdh	Clojure 1.3, if that matters...
03:48	tsdh	Well, that's no big deal anyway.
03:50	tsdh	The more pressing issue which nearly made me running mad yesterday is that proxy silently discards exceptions thrown in the method implementations. Is that intended? At least, the docs don't indicate that...
03:52	tsdh	Hm, oh well, probably that's not proxy, but the backtraces simply don't hit the slime repl...
03:52	amalloy	tsdh: that's not true
03:52	amalloy	it's possibly something to do with the async event processing you're doing
03:53	amalloy	but in my slime repl, eg: (.size (proxy [java.util.ArrayList] [] (size [] (throw (Exception. "test"))))) ; throws correctly
03:54	tsdh	amalloy: Throws correctly means what? You see the backtrace at the repl? Or are you even put in the debugger?
03:54	amalloy	the usual slime debug dialog appears
03:54	amalloy	0 to abort to slime top-level, etc
03:54	tsdh	Yep, here, too.
03:55	amalloy	like i said, it's probably because you're doing async programming
03:55	amalloy	the exception isn't occurring on the swank thread, so it isn't easily trapped
03:56	tsdh	amalloy: Yes, you are right. But if I did this in Java, at least I'd see the backtraces on System.err. With clojure and slime, I don't see anything.
03:56	amalloy	it's probably on the lein-swank console
03:56	amalloy	(not my fault if phil's hiding that from you)
03:56	amalloy	but you could try setting the defaultUncaughtExceptionHandler
03:57	amalloy	$google defaultUncaughtExceptionHandler
03:57	lazybot	[Thread (Java Platform SE 6)] http://download.oracle.com/javase/6/docs/api/java/lang/Thread.html
03:58	tsdh	What's the buffer name? I remember, with older slime/clojure-mode releases, I could jump to the inferior-lisp buffer, and that contained anything I'd see on System.out and System.err. But with the current version of clojure-mode and clojure-jack-in, that buffer doesn't even exist...
03:58	amalloy	shrug
03:58	amalloy	i use lein/cake swank and slime-connect by hand
03:59	amalloy	then it's either in the lein-swank process's stderr, or cake.log
04:00	amalloy	it's not like you have to use jack-in if it's causing you problems
04:01	tsdh	amalloy: Well, except from that issue, it works perfectly without having to setup anything.
04:03	tsdh	Ok, one other thing: Is case intended to work for public static int constants in java?
04:04	raek	tsdh: I think the buffer is called swank
04:04	tsdh	raek: That buffer is full of elisp.
04:05	raek	tsdh: look at the top
04:05	raek	yes, that's from the swank bootstrapping process
04:05	tsdh	raek: Oh, yeah!
04:06	raek	tsdh: when I'm working on a swing app, I use this 'safety-net' macro to get stack traces of unhandled exceptions as popups: https://gist.github.com/1098366
04:07	amalloy	tsdh: no it's not, but that might be in 1.3
04:07	raek	so all callback method bodies has a (safety-net ...) form at the outermost level
04:08	tsdh	raek: Neat, thanks.
04:09	tsdh	amalloy: I'm on 1.3, and there it does't work, too. (case 45 java.awt.KeyEvent/VK_MINUS true false) ==> false
04:09	amalloy	well, there was a fair bit of discussion about it on jira and the ML, which i didn't really follow
04:09	amalloy	if you're interested in how it was resolved, that's where to look
04:10	raek	I think the case expression ends upp using the _symbol_ java.awt.KeyEvent/VK_MINUS
04:10	raek	since the cases must be compile time constants
04:11	raek	but in this case it's not very logical, since java.awt.KeyEvent/VK_MINUS is available at compile time
04:11	tsdh	exactly
04:12	raek	but there is nothing in clojure that is constant at compile time like that
04:13	raek	you could probably work around this with a macro
04:13	amalloy	raek: indeed, chouser wrote such a macro
04:13	amalloy	somewhere
04:14	tsdh	raek: No, I'll stick with cond and keep that in mind. It just felt natural to use case in that place.
04:14	raek	ah, here's an old variant of case I made once to dispatch on classes: https://gist.github.com/997652
04:15	tsdh	amalloy: He had a macro to make even enum constants work (somehow), right? Or was it Chas Emerick?
04:15	amalloy	i think cemerick patched case
04:15	amalloy	chouser just pasted a quick macro into #clojure
04:15	amalloy	(useless bugger)
04:15	tsdh	amalloy: Yes, case* or something.
04:16	raek	replacing 'resolve' with 'eval' would problably work...
04:16	amalloy	i'd be rather surprised if it were called case*
04:17	tsdh	amalloy: Right, it's case+. http://cemerick.com/2010/08/03/enhancing-clojures-case-to-evaluate-dispatch-values/
04:57	harblcat	is there a way to turn a whole bunch of static method calls on a class into something like a (doto ...)?
04:58	harblcat	like, (Foo/a) (Foo/b) to (something Foo (.a) (.b))?
05:05	raek	,(macroexpand-1 '(doto SomeClass (. foo "arg") (. bar "arg")))
05:05	clojurebot	(clojure.core/let [G__1705 SomeClass] (. G__1705 foo "arg") (. G__1705 bar "arg") G__1705)
05:05	raek	harblcat: it looks like the let form is in the way for doing that
05:06	raek	so you probably have to roll your own "doto-class" macro
05:06	harblcat	I've tried that, but it seems to throw an error, saying "no matching method found: foo for class java.lang.Class"
05:07	raek	which had you tried?
05:07	harblcat	been looking at what (Foo/bar) expands to, and it's supposedly expanding to (. Foo bar)?
05:08	harblcat	and if doto puts x as the first argument to each form, it should come out just right, but it doesn't apparently
05:10	raek	using doto here fails since you get (. G__1705 foo "arg") instead of (. SomeClass foo "arg")
05:11	raek	. is a special form and its arguments are not evaluated
05:12	raek	yes, it expands to (. Foo bar). this syntax is easier to generate by macros
05:12	harblcat	Ah, so you're saying that doto somehow loses the class along the way?
05:13	raek	look at this macro expansion:
05:13	raek	,(macroexpand-1 '(doto SomeClass (. foo "arg") (. bar "arg")))
05:13	clojurebot	(clojure.core/let [G__1733 SomeClass] (. G__1733 foo "arg") (. G__1733 bar "arg") G__1733)
05:13	raek	this is the code that the doto form is replaced by
05:14	raek	for the interop to work, the code has to say (. SomeClass foo "arg"), i.e. the name of the class must be there in the code as a symbol
05:15	raek	(. x foo "arg") is also the syntax for a instance method call
05:16	raek	the compiler checks if the name represents a class ("SomeClass" does, but the is no class called "G__1733") and emits code for an instance or class method call based on that decision
05:17	harblcat	I think I understand now... It's treating the doto expansion as an instance-method call, and I want a static method call
05:17	raek	if you use doto here, it will generate code for calling an instance method called "foo" on the class object for the class "SomeClass", which is not the same as calling a class method called "foo" on the class
05:17	raek	exaactly
05:17	harblcat	I see. Thanks a bunch!
05:17	kumarshantanu	can set! be used with protected inherited fields from a base class?
05:32	triyo	What version of clojure-contrib, if any, matches the current clojure 1.3.0-master-SNAPSHOT?
05:32	triyo	I want to include it in my project.clj.
05:32	triyo	Or even better question, how do I determine this myself?
06:16	triyo	Ok so I get error: java.lang.IllegalArgumentException: No matching field found: getRoot for class clojure.lang.Var from the clojure.contrib.sql when using the clojure1.3 master snapshot
06:16	triyo	Can someone explain why this would be the case?
06:17	triyo	My guess is that the contrib is not compatible with the latest clojure 1.3.
06:17	ambrosebs	aren't master snapshots out of date?
06:17	ambrosebs	or is that the latest build?
06:23	triyo	ambrosebs: Not to sure, I have this in project.clj file: org.clojure/clojure "1.3.0-master-SNAPSHOT"
06:24	triyo	its looking for getRoot method that doesn't seem to be there
06:24	ambrosebs	try "1.3.0-beta1" (I think)
06:24	triyo	java.lang.IllegalArgumentException: No matching field found: getRoot for class clojure.lang.Var
06:25	triyo	Ok I'm giving the beta1 a try, thanks
06:29	triyo	I still get the error: java.lang.IllegalArgumentException: No matching field found: getRoot for class clojure.lang.Var :(
06:30	triyo	Ok, I have an idea
06:30	triyo	I have ClojureScript on my classpath too and need to run the it build in dev via my emacs session.
06:31	triyo	The ClojureScript/lib has a clojure.jar, any idea what version that is?
06:31	triyo	Is it compatible with 1.2.x?
06:31	ambrosebs	no idea
06:31	triyo	if so, then I don't really need reference to 1.3 at all
06:31	triyo	hmm
06:32	triyo	Ok, I'll have to take a look
06:45	danbell	,("asdjklfsdfds" 0)
06:45	clojurebot	#<ClassCastException java.lang.ClassCastException: java.lang.String cannot be cast to clojure.lang.IFn>
06:46	Pupeno_	I just ordered The Joy of Clojure! :)
06:47	Pupeno_	Anyone using La Clojure?
06:51	kjeldahlw	triyo: I think clojurescript is clojure 1.3 beta 1 .
07:18	ohwow_	Clojure doesnt have call/cc, does it?
07:26	pepijn	fliebel from italy here. does anyone know if Clutch supports document update handlers?
07:29	pepijn	it'd also be funny to write queries in ClojureScript, but Clutch already has a Clojure view server.
07:31	ilyak	Hi *
07:31	ilyak	I did a (deftype Something [] Runnable (run [this] ...code...))
07:32	ilyak	but if I try to instantiate Something from java code and run() it, I get the exception that variable I use in that code isn't bound
07:32	ilyak	It is present in that namespaces (given that code compiles)
07:32	ilyak	Why?
07:32	clojurebot	http://clojure.org/rationale
07:33	ilyak	Is deftype not standalone and I need gen-class for that?
07:40	volton	What's the name of the paper on pattern matching by Maranget everyone's talking about?
07:57	cemerick	volton: this is what dnolen linked to yesterday… http://moscova.inria.fr/~maranget/papers/ml05e-maranget.pdf
07:57	volton	cemerick: thanks
08:27	tsdh	Is it expected that apply-ing a function takes at least twice the time than calling it directly?
08:28	tsdh	(time (dotimes [i 1000000] (+ ([i] 0)))) ==> ~40ms
08:28	tsdh	(time (dotimes [i 1000000] (apply + [i]))) ==> ~130ms
08:32	triyo	Does anyone have an example that demonstraits how to create a postgresql "sequence" for auto-incrementing pk ids?
08:36	triyo	Found the answer on clojure group
08:37	ohwow_	tsdh: hm, that's interesting
08:37	Chousuke	tsdh: apply does quite a lot more than a plain function call. In addition, + gets inlined
08:38	Scriptor	tsdh: wouldn't it be (+ i 0) ?
08:38	Chousuke	it seems for some reason he wanted to put i in a vector and then extract it
08:39	tsdh	Scriptor: Yes, (+ i) is the same as (+ i 0), cause 0 is the neutral element of additien.
08:39	Chousuke	probably to simulate apply but that's not what apply does.
08:39	tsdh	Chousuke: Exactly, because apply gets the last args as seq.
08:40	Chousuke	at any rate, your example is not very good
08:41	Chousuke	apply is obviously going to be slower than a direct function call, but when measuring the difference you should use some code where it actually matters instead of something trivial like that
08:42	Chousuke	in other words, your benchmark is not representative of any real-world scenario
08:50	tsdh	Chousuke: Well, right. I'm just looking for some performance bottleneck in my code and realized that I apply very often, like for iteratively executing a function and passing the results along. However, if 10 million applications make only 90ms more, that's not where my seconds are left.
08:52	Scriptor	there should be a java profiling tool that can be used with clojure
08:52	cemerick	There are many
08:52	cemerick	VisualVM, NetBeans (roughly the same), Eclipse, Yourkit, probably more
08:54	tsdh	cemerick: I'll try out one of those. Any suggestion what to take?
08:55	cemerick	Yourkit is probably the best; visualvm is also very nice, free, and you probably already have it (it ships with the JDK)
08:57	tsdh	cemerick: But not with OpenJDK/IcedTea on x86_64...
08:57	Chousuke	it might be in a separate package?
08:59	cemerick	tsdh: good luck in general, then. ;-) sun-java6-jdk (or whatever it's called) is worth the install IMO.
09:00	cemerick	Oh, the days I spent trying to get Java2D font rendering working properly using openjdk/icedtea… :-(
09:01	tsdh	cemerick: I want it fast not pretty. ;-)
09:02	cemerick	tsdh: Last time I benchmarked the two, the sun VM was also faster shrug
09:03	cemerick	Hopefully that's less the case now. Theoretically, there shouldn't be a difference between the two starting with JDK 7 IIRC — but I remain wary.
09:06	tsdh	Hm, visualvm instantly crashes due to some Qt stuff...
09:33	Vinzent	,map-indexed
09:33	clojurebot	#<core$map_indexed clojure.core$map_indexed@136055d>
09:54	tsdh	I don't get visualvm to work. When I run "lein test", two Clojure applications will show up. I guess one is leiningen, the other my app. No matter which I choose and select CPU in the Profiler tab, the results do not contain a single class/method of mine. Any hints?
10:04	cemerick	tsdh: yours is probably the one with the higher pid. Are you having your app do work while you're profiling?
10:07	tsdh	cemerick: Yes, I use the one with the higher pid. And yes, my test cases are plenty of cpu-brning work.
10:08	tsdh	cemerick: When I delete anything from the "start profiling from classes", "do not profile classes" textfields, I get at least quite a few "Redefining 100 classes at idx 0, out of total 493" messages.
10:09	tsdh	And some of my classes show up. However, that happens not before my tests are nearly done...
10:16	cemerick	tsdh: If you're just looking at the unaltered real-time hotspot view, then you may not see your functions/classes, especially if the hotspots aren't there. You can filter the classes shown via the text field at the bottom. If you take a snapshot after you've done a fair bit of work, then you can switch to the "combined" view, find a class/function of yours, and it'll show the entire stack above and below your class/function, along w
10:16	cemerick	total time, invocation count, etc.
10:25	tsdh	cemerick: Now I get results. But why do I get these "Redefining 100 classes at idx 0" messages and my classes showing up in the profiler tab so late? Actually, that happens not before the last few deftests of the last of 5 test namespaces run...
10:26	Poet_	Hi .Can anyone give me link to real world project in clojure ?
10:30	cemerick	tsdh: the profiler has to instrument the classes it's going to track. I'm not sure about the delay/timing — I get data flowing within ~5s. If you fiddled with classname filters, perhaps they're set too strictly?
10:34	tsdh	cemerick: I had to remove all filters to get at least the current behavior...
10:35	joegallo	Poet_: What's qualifies as real world?
10:37	wjlroe	Poet_: this is Clojure (on the App Engine): https://the-deadline.appspot.com/
10:38	wjlroe	technomancy: I'm having problems running leiningen on Linux (through Jenkins) - it just hangs when `lein jar` or `lein compile`... any ideas what's going on there?
10:39	Vinzent	Poet_, http://www.uswitch.com/, flightcaster, etc, you can find some projects on clojure dev site under success stories
10:46	jcromartie	I'm working on a (albeit simple) real world app
10:46	jcromartie	and I'm using it in-house to put a shiny new layer on an old database system
10:47	ipostelnik	is there an existing function in clojure.core that will a apply a function to map's values?
10:47	wjlroe	(map fun (values this-map))
10:47	wjlroe	well not really
10:48	kumarshantanu	ipostelnik: (map (fn [[k v]] ...) {:a 10 :b 20})
10:48	ipostelnik	something like (fn mm [m f] (into {} (map (fn [[k v]] [k (f v)]) (seq m)))
10:52	jcromartie	I'm struggling with some design decisions when it comes to how to implement an API for a general "repository" of model objects
10:52	jcromartie	should I deal with refs?
10:52	jcromartie	or with the underlying value of the ref?
10:53	jcromartie	like, should I say a repo is (ref {}) or just {}
10:54	jcromartie	I think I'm having a hard time describing it well
10:56	ejackson	after setting the clojurescript environment, is it intended that cljsc works from anywhere in the filesystem but repl and repljs do not ?
10:59	jcromartie	here's what I have right now, with no refs in sight at this level: https://gist.github.com/1111698
10:59	jcromartie	I use refs for my actual domain layer
11:06	gtrak	working on a lein project that has tests in another lein project, is there a way to deploy the build of the first so the second will pick it up, or must I use the remote repo?
11:10	wjlroe	gtrak: https://github.com/technomancy/leiningen <- have a look for "checkout dependencies" in the FAQ
11:10	replaca	gtrak: you can just do a "lein install" on the dependency and it will put it in your local ~/.m2
11:11	gtrak	ah, perfect
11:12	gtrak	you guys have thought of everything
11:14	charliekilo	stupid question: why can't I do (def m {:name String}) (new (:name m)) ?
11:17	Vinzent	charliekilo, i guess it's because new does not evaluates its argument
11:17	cemerick	charliekilo: new is a special form, not a function
11:18	kumarshantanu	charliekilo: (.newInstance (:name m))
11:18	kumarshantanu	which uses reflection
11:25	gtrak	does 'new' not use reflection?
11:27	kumarshantanu	gtrak: no, new uses the Class instance without looking up the runtime information
11:27	gtrak	ah, it's a compile-time binding
11:40	charliekilo	cemerick: thanks, thats works for me (not that I doubted you ;))
11:44	manutter	can I pull in the Spring Security jars by adding some dependency lines to my project.clj (and if so does anyone know what lines to add)?
11:49	Vinzent	manutter, I use http://www.mvnbrowser.com/ for searching right deps
11:50	manutter	Vinzent: cool, thanks much!
11:54	gtrak	manutter, there's also this: http://mvnrepository.com/
11:54	gtrak	http://mvnrepository.com/artifact/org.springframework.security/spring-security-parent
11:55	manutter	Cool again, (and thanks again)
11:56	mrBliss	I use http://jarvana.com
11:57	gtrak	does lein have provided and excludes?
12:07	manutter	Ok, I got spring-security-core and spring-security-web, and I think that's all I need for basic auth & auth. Now to figure out how to make it all work.
12:07	manutter	(PHP programmer here, venturing into uncharted territory...)
12:08	Pupeno	Java 7 has been released?
12:08	dakrone	gtrak: it has excludes, not sure about 'provided'
12:10	manutter	ls
12:11	manutter	doh, wrong window
12:18	edoloughlin	Anyone used 'rand' to initialise values with clj-record/create? I'm seeing different values to what's in the DB if I do this. I posted some of the code I'm using to http://stackoverflow.com/questions/6862066
12:24	nowhere_man	hi all
12:24	nowhere_man	I'm a happy Common Lisp and Scheme hacker, and I'd like to add Clojure to dialects
12:24	nowhere_man	I recently tried installing swank through leiningen and it failed miserably
12:25	nowhere_man	what is the current weapon of choice to have Clojure within SLIME?
12:25	ohwow_	I just did that tomorrow and everything went fine :(
12:25	dakrone	nowhere_man: how did the swank installation fail?
12:26	Vinzent	nowhere_man, I have :dev-dependencies [[swank-clojure "1.3.2"] in project.clj
12:26	kephale	nowhere_man: :dev-dependencies [[swank-clojure "1.4.0-SNAPSHOT"]]
12:26	dnolen	nowhere_man: note that getting Clojure to work an existing Common Lisp SLIME setup is difficult
12:27	nowhere_man	dnolen: I still need to work with Common Lisp each day...
12:27	technomancy	dnolen: actually now it works OK as long as you don't need them to coexist in the same instance
12:28	nowhere_man	dnolen: but I'm okay to launch swank manually and then connect to it with slime-connect, that shouldn't be a problem, should it?
12:28	dnolen	nowhere_man: technomancy is the man to speak to :)
12:28	technomancy	if you use a fresh emacs instance with M-x clojure-jack-in, the CL-compatible slime should not interfere
12:30	ohwow_	clojure-jack-in works only on projects?
12:30	ohwow_	or can i use it with ordinary .clj files
12:31	technomancy	ordinary .clj files are in projects =)
12:31	nowhere_man	Vinzent/kephale: thanks, I just did it wrong, I did `lein install swank-clojure`
12:31	technomancy	ohwow_: for stand-alone files you can use ~/.lein/bin/swank-clojure and M-x slime-connect
12:32	Vinzent	btw, technomancy, why lein tasks must be run from the project root now?
12:33	technomancy	Vinzent: I think that snuck in as a bug briefly; fixed in the latest release
12:34	Vinzent	oh, great! Thank you :)
12:40	nowhere_man	ok, thanks all
12:40	mrBliss	nowhere_man: my solution: https://gist.github.com/1111898
12:41	nowhere_man	technomancy: swank-closure is correctly documented, this is rare enough that it warrants my gratitude
12:41	jcromartie	nowhere_man: docs FTW, eh
12:41	nowhere_man	:-D
12:41	jcromartie	I'm kind of proud of the way clojure projects are documented
12:42	Cozey	is it possible to run leiningen repl without using lein script? I'd like to run it inside Intellij Idea 'La clojure' plugin, which just lets one specify arguments to a clojure.jar file...
12:42	jcromartie	part of my automated tests report any undocumented public fns
12:43	nowhere_man	jcromartie: nice QA·
12:43	raek	Cozey: well, you can use "lein classpath" to get the -cp option lein uses
12:44	raek	Cozey: are you looking for a certain lein feature or just the clojure repl?
12:45	Cozey	repl would be best
12:46	Cozey	because i need to debug an app which uses some java classes
12:46	Cozey	i jsut can't go on with emacs and slime and cdt. I'm unhappy about it, but I must admit it is a productivity killer
12:48	Cozey	hmm it seems leoiningen plugin for idea does wonders and it just works !
12:49	gtrak	oh wow, didn't know idea had one of those
12:50	raek	Cozey: the most basic way to start a repl manually in a lein project would be to do something like java -cp <output from lein classpath> clojure.main
12:51	raek	assuming idea adds line editing and history
12:54	kumarshantanu	gtrak: yes
12:54	kumarshantanu	provided is dev-dependencies
12:54	kumarshantanu	and excludes is exclusions
12:55	Cozey	ok
12:55	Cozey	just one problem more- it seems lein generates a pom.xml without excludes
12:55	Cozey	and now i have contrib for 1.3 and 1.2 ( i try to run 1.3)
13:00	hv	yay for java.net.URLClassLoader/close
13:00	jcromartie	can I "clean up" a namespace and reload it?
13:01	hv	jcromartie: As far as I know, not easily. yet. the unloading of a class loader, and gc'ing it in JDK7 is in that direction.
13:02	jcromartie	there's remove-ns
13:02	jcromartie	worked OK for me
13:02	hiredman	just reload the namespace
13:03	hiredman	use (and also I believe require) takes :reload or :reload-all
13:04	hv	just keep in mind that :reload does not magically take care of everything the ns did.
13:06	jcromartie	hiredman: reloading is fine, but I'm concerned with changing defs
13:06	jcromartie	like a (defn foo) goes away, and reloading leaves the old one
13:08	hv	jcromartie: in that case you remove-ns. (notice some libraries have ;; (remove-ns 'THEIR-NS) at the top. the developers eval them before reload).
13:10	hv	if you did something to other namespaces, you may have to remove-ns them, too.
13:32	leonid_	hello people
13:32	leonid_	I started playing with clojure yesterday
13:32	leonid_	4clojure is helping me greatly
13:33	manutter	yeah, 4clojure is awesome
13:33	leonid_	i've got a question
13:34	hv	you should just ask ;)
13:34	leonid_	is there any ways to know the actual number of letters in the shortest 4clojure entries?
13:34	manutter	You might also want to google "clojure koans" for some good introductory material, btw
13:34	leonid_	all I'm seeing is a histogram
13:35	manutter	where are you seeing the histogram?
13:36	leonid_	when you submit a code and it passes all tests, it lets me click the "view chart" link
13:36	leonid_	(I've joined the golf league btw)
13:36	manutter	Heh, I feel dumb now, I never noticed that link before.
13:37	manutter	Hmm, in fact I'm still not seeing it.
13:37	leonid_	you should join the golf league to see the chart
13:38	leonid_	http://4clojure.com/league
13:38	manutter	That must be it, I never joined a league.
13:39	leonid_	it would be great if I could see the code sizes of the best entries and my own solutions next to the problem titles in the list
13:39	leonid_	because as of now I just need to re-submit my solution to check the chart
13:40	manutter	Yeah that would be cool
13:40	manutter	The code is open source, you could submit a patch :)
13:43	leonid_	when I get better at clojure, I migh
13:43	leonid_	t
13:55	jweiss	is there a way to get 'lein swank' to bind to all interfaces, not just local?
13:55	jweiss	for connecting to remote project
13:57	technomancy	jweiss: there is a way, but you shouldn't do it. tunnel over SSH.
13:58	jweiss	technomancy: k
14:13	imade	in 4clojure can I see other people solutions, would be nice to compare with mine
14:17	imade	k actually it makes sense not to show other solutions, otherwise the clojure gold loses it's point
14:18	imade	I am wondering if #(reduce (fn [coll x] (cons x coll)) [] %) is idiomatic solution for http://www.4clojure.com/problem/23
14:18	mattmitchell	i'm trying to build a function called one-of? which accepts a value, and a list of predicate functions. I want it to return true if one of the predicates returns true... Is there anything like this already?
14:18	imade	the shortness is not important for me, more important is that it's easy to read
14:19	kumarshantanu	mattmitchell: (some #(% value) predicates)
14:19	mattmitchell	kumarshantanu: ahh perfect :)
14:27	ibdknox_	As promised
14:27	ibdknox_	I have my browser-based ClojureScript repl:
14:27	ibdknox_	https://github.com/ibdknox/brepl
14:28	triyo	Is there currently a solution to include ClojureScript in to existing projects? More specifically, leiningen based project and emacs with slime / swank.
14:28	gtrak	ooo nice
14:28	thearthur	Who should I politely nudge to get my range patch merged?
14:28	ibdknox_	2 requirements: you need clojurescript on your machine, and rlwrap for a prettier REPL :)
14:28	triyo	Reason I ask, is that I have a project that is based on clojure 1.2.1 and it seems that ClojureScript requires clojure 1.3.
14:29	ibdknox_	triyo: that's going to be a pain
14:29	jcromartie	imade: I think I've got a better one
14:29	triyo	not going, it is ;)
14:29	gtrak	ibdknox_, I was just looking at your socketio library a couple of days ago, very cool
14:29	ibdknox_	gtrak: I actually didn't want to use it here
14:30	ibdknox_	gtrak: it's like using a nuclear bomb to kill a mosquito
14:30	ibdknox_	gtrak: but aleph wouldn't work with 1.3.0
14:30	gtrak	ah
14:30	jcromartie	imade: #(reduce conj nil %)
14:30	ibdknox_	also, changes in 1.3 killed the way the clj-socketio stuff worked :(
14:31	gtrak	isnt it just a wrapper for the java one?
14:31	ibdknox_	yeah, but it reify's an interface
14:31	triyo	ibdknox_: I could try to go the other route and that is upgrade my project to clojure 1.3, however that brings me to different problem. Is there a compatible version of clojure-contrib for 1.3?
14:31	ibdknox_	triyo: the contrib libraries have all been broken apart and become new things
14:32	triyo	ibdknox_: yup, I gather as much on attempting to do so anyway
14:32	triyo	it hell broke loose
14:32	ibdknox_	triyo: which ones are you looking for?
14:32	triyo	*it=all
14:32	jcromartie	It's easy to cheat on a lot of these 4clojure problem
14:32	ibdknox_	gtrak: before in that reify'd class I would call anonymous functions stored in an atom
14:33	triyo	well just org.clojure/clojure-contrib
14:33	ibdknox_	gtrak: for some reason it wouldn't let me do that anymore
14:33	ibdknox_	triyo: there's no way you're using all of contrib :-p
14:33	triyo	Of course I am ;-)
14:33	triyo	just kidding
14:34	triyo	If I have -> in project.clj is that all libs? [org.clojure/clojure-contrib "1.2.0"]
14:34	triyo	cause fact of the matter is I only need contrib/sql as far as I recall
14:35	triyo	I think its a long shot that just my fall short of the mark...
14:36	triyo	I need to stick to 1.2.x of clojure and contrib
14:36	technomancy	triyo: have you tried clojure.java.jdbc? it should work with 1.2 or 1.3
14:36	imade	jcromartie: thank you, I will meditade about this a little bit
14:37	triyo	here are all the libraries I need for my exiting project -> https://gist.github.com/1112209
14:38	triyo	technomancy: I haven't tried with 1.3. I am utilizing the clojure.java.jdbc with 1.2
14:38	seancorfield	clojure.java.jdbc is tested against both 1.2.1 and 1.3.0
14:38	technomancy	triyo: I meant that jdbc should replace contrib/sql
14:39	technomancy	triyo: what's more relevant is what nses you use inside contrib
14:39	triyo	technomancy: Oh right I see what you mean
14:39	seancorfield	yes, it's better to move to the new contrib libraries as soon as you can so your transition to clojure 1.3.0 will be easier
14:39	seancorfield	also means you don't get a "kitchen sink" of 60 modules when you only want one or two :)
14:40	ibdknox_	seancorfield: that transition has been surprisingly complicated so far :(
14:40	triyo	ok, I have a plan. I'll drop my use of clojure/contrib quick and see if there is any dependencies.
14:40	cemerick	it's the price one pays to be a bleeding edge library author, I think
14:41	jcromartie	wow, I just discovered "reductions"
14:41	triyo	its a small price to pay cemerick
14:41	triyo	;)
14:42	seancorfield	ibdknox_: not for me - i moved to 1.3.0 snapshots before alpha builds i think :)
14:42	seancorfield	but, yeah, if you have a bunch of existing 1.2-compatible code, it can be painful
14:43	ibdknox_	my problem has largely been with the fact that most of the ecosystem is still on 1.2 code that won't even run in 1.3 lol
14:45	technomancy	well as long as people report the compatibility issues they find and/or submit patches fixing them things should be better by the time the release lands
14:46	technomancy	most of the changes needed are trivial, there are just a lot of them
14:46	triyo	technomancy: so far so good. thanks for your assistance. only reason I had the clojure/contrib was because my project originally depended on the sql lib. But since I switched to clojure.java.jdbc, no need for it any more.
14:47	hiredman	^{:dynamic true} this and ^{:dynamic true} that
14:47	thearthur	im trying to follow the patch submiting process from clojure.org, and it mentions taging the patch for testing. how do I do that
14:47	hiredman	hugod: do you have a list things you need from monolithic contrib?
14:47	technomancy	hugod: what's happening with alioth?
14:48	dnolen	hugod: why, contrib was always community driven, seems like a bad use of limited resources IMO. they don't even have time for alioth.
14:49	hiredman	thearthur: the instructions are written for pre-jira process, I think jira has some workflow drop down or something
14:49	triyo	technomancy: now for a question regarding clojure-swank that you might know a thing or two about pls. Does the clojure-swank lib need to have the matching clojure version? In other words, whats in the prj/lib dir andprj/lib/dev?
14:50	hugod	hiredman: I'm just about covered now, but it has been a long process
14:50	dnolen	technomancy: core wants the community to step up and write 1.3 alioth code to show that Clojure perf has made a significant jump (probably be as good or best OCaml now)
14:50	technomancy	triyo: I think swank is backwards-compatible as far as clojure 1.1
14:50	hugod	technomancy: just a comment from the mailing list
14:50	technomancy	hugod: oh, the benchmarks
14:50	technomancy	yeah, waste of time
14:50	thearthur	hiredman: looking... any idea what this looks like?
14:50	technomancy	those guys are well-documented to have a prejudice against the JVM
14:50	hugod	dnolen: most of the new contribs don't have bug trackers set up for instance
14:51	dnolen	hugod: whose fault is that? the contrib authors.
14:51	technomancy	I thought you meant the alioth git repo
14:51	raek	what is this alioth?
14:51	technomancy	dnolen: someone has to give the authors the permissions in the first place
14:51	hiredman	thearthur: I forget, I go through this same dance everytime I try to submit a patch, which is not often enough to remember the steps
14:51	dnolen	technomancy: prejudice does help much since it's basically ATS, C, C++, Java -server dominating the benchmarks.
14:51	hugod	dnolen: and some of the authors are from core
14:52	triyo	Does one have to use clojureScript/lib/clojure.jar file or can I just getting via leiningen?
14:52	dnolen	technomancy: someone has to ask for it, that's like one email.
14:52	triyo	Its not a magical ver that works specially with cljs right?
14:53	technomancy	raek: alioth is a debian-specific gforge instance that also hosts some benchmarks
14:54	dnolen	hugod: ah yeah, that's true. it would be nicer if clojure/core was clear about what they no longer want to maintain.
14:54	leonid_	[11:18:39] <imade> I am wondering if #(reduce (fn [coll x] (cons x coll)) [] %) is idiomatic solution for http://www.4clojure.com/problem/23
14:54	dnolen	but again, people could just ask.
14:54	triyo	ok, I see its not as per the bootstrap script
14:55	leonid_	the more optimal (?) solution uses less than ten letters
14:56	leonid_	if you want, I can pm you the solution
14:58	triyo	Only problem I have is that I had to manually hack over the compiler.jar+goog.jar and the src/ in to my project. No package management for clojurescript at the moment sucks a bit.
14:58	ibdknox_	speaking of
14:58	ibdknox_	is anyone working on a package management solution for CLJS?
14:59	leonid_	clj crashes due to a whitespace in my home directory name
14:59	leonid_	so I need to use it on its parent directories
14:59	triyo	btw, whats the deal with ^:dynamic in clj 1.3?
15:00	hiredman	vars are no longer dynamically rebindabled by default, if you want them to be you have to mark them as such
15:03	triyo	hiredman: interesting move. More functional.
15:03	triyo	like maths let x = 3 -> x always 3 right?
15:04	hiredman	no
15:04	triyo	ok could you explain just a bit?
15:05	triyo	reasoning that is behind no dynamic rebind.
15:05	grumpytoad	so... i'm reading a lot about a good emacs environment - since I'm mainly a vim user, is it worth my while to switch to emacs for clojure ev ?
15:05	grumpytoad	*dev
15:06	dnolen	triyo: it's a performance optimization. 1.3.0 is mostly about that, unifying numerics, with a couple other goodies here and there.
15:07	triyo	Oh I see, hence there is a manual override in case you need the dynamicity of Vars
15:07	dnolen	triyo: yup.
15:14	raek	ah, cool. some implemented the idea: https://github.com/ibdknox/brepl
15:14	mattmitchell	how can i get the difference between 2 vectors?
15:14	peterise1ins	mattmitchell: how would you define it?
15:16	mattmitchell	eheh, well i know there is set/difference, but i haven't been able to get it to work with vectors...
15:17	mattmitchell	ok so let me convert to set... hmm.
15:17	dnolen	,(set [1 2 3])
15:17	clojurebot	#{1 2 3}
15:17	dnolen	,set/difference
15:17	clojurebot	#<CompilerException java.lang.RuntimeException: No such namespace: set, compiling:(NO_SOURCE_PATH:0)>
15:17	dnolen	,clojure.set/difference
15:17	clojurebot	#<CompilerException java.lang.RuntimeException: java.lang.ClassNotFoundException: clojure.set, compiling:(NO_SOURCE_PATH:0)>
15:17	dnolen	oh well
15:18	technomancy	mattmitchell: clojure.data/diff in 1.3 maybe
15:18	peterise1ins	,clojure.set/set-difference
15:18	clojurebot	#<CompilerException java.lang.RuntimeException: java.lang.ClassNotFoundException: clojure.set, compiling:(NO_SOURCE_PATH:0)>
15:18	mattmitchell	ok cool, this is giving me enough to play with
15:19	dnolen	mattmitchell: (set/difference (set [...]) (set [...])) should work as long as the vectors don't have duplicate items and order is not a consideration.
15:19	mattmitchell	dnolen: ok excellent thanks!
15:24	tsdh	If I have a function (defn foo [x] (let [a ... b ...] (foo a) (foo b))) where the recursion is for side-effects only, how do I write it to not consume stack?
15:25	gtrak	what is this syntax #'symbol?
15:26	chouser	gtrak: that's shortcut for (var symbol)
15:27	chouser	It evaluates to the Var object named "symbol"
15:27	gtrak	I see
15:28	gtrak	what would be the purpose of that?
15:28	chouser	You can deref it to see the current value of that var
15:28	gtrak	it adds an indirection to symbol resolution?
15:29	Netfeed	how can i "unpack" a list? (take 2 (range 10)) returns (0 1), but how can i use that for say +? (+ (take 2 (range 10)))
15:29	Chousuke	apply
15:29	Chousuke	(doc apply)
15:29	clojurebot	"([f args] [f x args] [f x y args] [f x y z args] [f a b c d ...]); Applies fn f to the argument list formed by prepending intervening arguments to args."
15:29	Netfeed	ah, yeah, that's true, thank you
15:29	dnolen	,(reduce + (take 2 (range 10)))
15:29	clojurebot	1
15:33	raek	gtrak: it is useful when you, for instance, want to store a callback function in a data structure somewhere
15:33	gtrak	aren't named functions all vars anyway?
15:34	raek	(defn foo ...) (def callbacks {:f foo}) ; <-- here the current value of foo is stored. if foo is redefined, 'callbacks' won't be updated
15:34	raek	(def callbacks {:f #'foo}) solves that problem
15:34	gtrak	so a var to a var
15:36	gtrak	I see, the root binding is early-bound, this makes it late?
15:36	raek	gtrak: when a function is refered to in a piece of code, the var will be dereference each time the code is executed.
15:36	raek	gtrak: no, a var to a function
15:36	raek	instead of just the function
15:37	gtrak	right, i think we're saying the same thing
15:37	raek	in (def a x), x is dereferenced once. in (defn b [] x), x is dereference each time b is called.
15:37	gtrak	early vs late binding
15:38	raek	(assuming x is a var here)
15:44	gtrak	raek, ah, if you use that var as a function it is automatically dereferenced, sneaky!
15:45	hiredman	no
15:45	hiredman	names that are free in an expression are always resolved to the dereferencing of a var
15:47	gtrak	what's it mean to be free in an expression? I notice the leftmost is dereferenced and the arg is not
15:48	hiredman	gtrak: http://en.wikipedia.org/wiki/Lambda_calculus#Free_variables
15:49	gtrak	hiredman, this may be helpful to me someday :-), but right now it makes no sense
15:51	hiredman	(def x 1) (fn [] (+ x x)) is compiled as somethinglike (def x 1) (fn [] ((deref (resolve 'clojure.core/+)) (deref (resolve `x)) (deref (resolve `x))))
15:51	raek	(fn [x] (let [y 1] (list x y z))) ; <-- here z is a free variable, but not x and y
15:52	gtrak	ah, not a lexically scoped one
15:52	hiredman	in the code the compile emits vars are actually only resolved when the fn loads, and just loaded from the fn's var cache and derefed, instead of calling resolve every time
15:53	gtrak	ah, unless you explicitly tell it to be a var?
15:53	gtrak	with #' or (var ..)?
15:54	hiredman	#' and (var ...) are actually the same thing
15:55	hiredman	the reader changes one into the other
15:55	hiredman	but yes, explicitly referencing the var gets you the var, not the value of the var
15:56	hiredman	but if I recall it still loads the var into the var cache for the fn
15:56	gtrak	is it implemented as a var to a var? like a double pointer?
15:56	raek	this would be a var-to-a-var: (def x 1) (def y #'x)
15:57	gtrak	right
15:58	raek	vars are like pointers, but the reference they contain could also be seen as a kind of pointer
15:58	gtrak	right, so try (y nil)
15:58	gtrak	you get "java.lang.ClassCastException: java.lang.Integer cannot be cast to clojure.lang.IFn (NO_SOURCE_FILE:0)"
15:59	raek	I never said anything about functions... :)
15:59	gtrak	so it's deref'ing the var, that's what I was referring to :-)
15:59	raek	if x would contain a function, that would have worked
15:59	gtrak	ah right, I'm not worried about the exception, obviously an int isn't a fxn, but y was a var
16:00	raek	but afaik, the compiler won't generate any var-to-var code unless you explicitly write something like the above
16:07	gtrak	hiredman, so, when you call a function the argument isn't considered to be a free variable to be resolved? doing (print y) gives you #'user/x
16:07	mefesto	gtrak: anything can be called like a function if it implements clojure.lang.IFn
16:08	gtrak	does var implement IFn?
16:08	mefesto	gtrak: clojure.lang.Var implements IFn
16:08	gtrak	ha
16:08	gtrak	doubly sneaky
16:08	mefesto	gtrak: so do Keywords which is why (:fname amap) works
16:08	gtrak	so var just delegates to its value
16:09	hiredman	gtrak: y is a free variable, it is resolved to the var #'y, and deref'ed which gives you #'x
16:10	mefesto	gtrak: https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/Var.java#L377
16:10	mefesto	gtrak: calls to invoke delegate to fn which derefs itself
16:10	gtrak	bam, well there it is
16:11	mefesto	gtrak: pretty cool setup :) pretty cool when using deftype
16:13	Netfeed	is it possible to write tests for private functions? or is it better to just write for the public ones?
16:13	Netfeed	with clojure.test
16:15	mefesto	Netfeed: i can't comment on what's better but if you require a lib you can call a private function in it with something like (#'my.lib/f)
16:15	gtrak	mefesto, what's cool about it with deftype?
16:16	mefesto	gtrak: it's just more the same but applied to your own types
16:16	Netfeed	mefesto: alright, i'll start from there, thank you
16:20	mefesto	gtrak: https://gist.github.com/1112451
16:21	gtrak	the invoke is the special sauce?
16:21	mefesto	yeah IFn.invoke
16:21	gtrak	ah you're extending IFn
16:22	gtrak	that one: invoke(Object arg1, Object arg2)
16:23	mefesto	IFn.invoke(Object arg1)
16:24	mefesto	in deftype, the first arg is the target object
16:24	mefesto	like how in python the "this" reference is made explicit
16:24	gtrak	ah
16:25	gtrak	but when you run it it actually uses the java model, and doesn't pass in the 'this' as the first arg
16:25	mefesto	yup
16:27	imade	can anyone offer me feedback for 4clojure problem http://www.4clojure.com/problem/26, my solution is at https://gist.github.com/1112440
16:30	amalloy	imade: instead of using reduce/loop to eagerly create a list of N fibonacci numbers, try lazily creating a list of infinite fibonacci numbers and then just take'ing from that. it can come out a lot simpler that way
16:31	imade	amalloy: yeah that would definitley be a better alorithm
16:32	imade	I will meditate about this now
16:33	amalloy	also in general if you find yourself building a list and then reversing it, you probably meant to use a vector instead (doesn't really apply if you want to take the first bit of advice)
16:34	imade	I used list so I could access the previous calculation
16:35	amalloy	right. you couldn't (shouldn't, anyway) do that with a lazy-seq, but with a vector it would be at least as easy
16:36	amalloy	oh, but you couldn't destructure it
16:36	imade	yes
16:36	imade	in list the previous calculation was in the first position
16:37	amalloy	&(let [prev [0 1 2 3 4]] ((fn last-two [v] [(peek v) (peek (pop v))]) prev))
16:37	lazybot	⇒ [4 3]
16:38	imade	I see, very cool
16:39	imade	btw, the correct solution in 4clojure starts with 1 1 ..., in wiki it's 0 1 1 ..., why's that?
16:39	amalloy	good question
16:40	amalloy	i hadn't noticed we did that. kinda silly
16:40	amalloy	but you can compensate for our failing by making your base case [1 1] instead of [0 1]
16:41	imade	yeah
17:23	triyo	I have a ClojureScript function that attempts to generate a slug uri based on input string and automatically set the input text field with the value. https://gist.github.com/1112594
17:24	zoldar	hello, I'm trying to setup ritz (formerly swank-clj). I'm able to run swank server through 'lein ritz' and connect to it, but when I pass a form with error I don't get any stacktrace: http://paste.lisp.org/display/123620 . Any ideas what could I've missed?
17:24	triyo	Problem is I don't really know how to set a value "property", instead it attempts to call it as a function instead a property of HTMLInputElement
17:26	triyo	hmm, set! I guess blush
17:27	hugod	triyo: ritz still needs to have some work done on filtering which exceptions break into the debugger
17:27	triyo	wrong person ;)
17:28	hugod	oops, sorry
17:28	triyo	np
17:28	hugod	zoldar ^^
17:30	leonid_	has anyone gotten less than 28 points on http://4clojure.com/problem/29 ?
17:30	zoldar	hugod, hmm but that exact simple example was taken from presentation - is there anything I can do to make it break into debugger in such cases?
17:31	triyo	Holy smokes, where have I bean for the past year, http://4clojure.com/
17:32	triyo	*bean=been
17:32	triyo	this looks awesome.
17:32	leonid_	yes it is!
17:33	hugod	zoldar: you could patch ritz… ritz.jpda.debug/break-for-exception?
17:33	Raynes	amalloy: You've got fanboys ^
17:34	hugod	zoldar I'm currently working on fixing it -but not managing to devote much time to it
17:34	triyo	I see that the 4clojure numbers haven't hit even close to the number of foreclosures in the US ;-)
17:35	triyo	23,451 only
17:35	zoldar	hugod, ok, thanks for your efforts so far
17:36	amalloy	leonid_: two people have 25
17:36	leonid_	wonder how they managed to do it
17:36	hugod	zoldar: np, I get annoyed by the same issue - so it's likely to get fixed
17:36	leonid_	amalloy: how does one know the size of the smallest entry?
17:37	amalloy	leonid_: i log into the server and query the database :P
17:37	leonid_	you should make it visible
17:37	leonid_	please !
17:37	scottj	ibdknox: why have CLOJURESCRIPT_HOME in brepl when already set for clojurescript? also maybe print index.html url in terminal so user can just click on it
17:37	amalloy	patches welcome :)
17:37	leonid_	after I get more familiar at clojure..
17:37	leonid_	(started only a day ago)
17:38	amalloy	ah
17:41	amalloy	leonid_: mind gisting your 28-character solution somewhere? there might be a way to trim three characters off it while using the same general approach
17:41	leonid_	mind if I just post it here?
17:41	amalloy	hah, sure. i guess it's short enough
17:41	leonid_	#(apply str (re-seq #"[A-Z]" %))
17:42	leonid_	i'm suspecting that I can reduce 3b from the regex
17:42	mattmitchell	anyone know of a lib i can use to get the distance between to x/y coordinates?
17:43	amalloy	mattmitchell: i think it's called Math.sqrt :P
17:43	gtrak	jesus... pythagoreanlib
17:46	raek	(defn distance [p1 p2] (->> (map - p1 p1) (map square) (reduce +) (Math/sqrt)))
17:46	raek	(defn square [x] (* x x))
17:46	raek	works on any number of dimensions!
17:49	leonid_	looks like regex is not the problem
17:54	dnolen	clojurebot: max people
17:54	clojurebot	max people is 317
17:54	technomancy	clojurebot: lies
17:54	clojurebot	excusez-moi
18:12	leonid_	hell yeah got 25 chars
18:56	technomancy	interesting; debian is considering dropping java for mips, which would mean most -gcj packages would go away across the board.
18:57	technomancy	FSVO interesting
19:08	frou	I posted a socket-REPL-related question on StackExchange. Can any shell scripters tell me if it's a fool's errand? http://unix.stackexchange.com/questions/17562
19:10	technomancy	you want rep!
19:10	technomancy	clojurebot: rep?
19:11	clojurebot	you mean clojure.main
19:11	technomancy	...
19:12	technomancy	I'm not sure if you can do it with that contrib lib. you could try calling (.close in) or something
19:15	frou	ooh, that does work it seems
19:16	frou	I was coming at it from the wrong angle, shell hackery. thank you technomancy
19:17	technomancy	no problem
19:19	amalloy	frou: C-c is kinda rude there anyway. use C-d to close repls, most of the time
19:20	amalloy	(which amounts to basically the same thing as closing the socket)
19:21	amalloy	wait, but you only want to kill the netcat process, not the long-lived clj process. i see. so does technomancy's solution really work?
19:23	frou	amalloy → ^D doesn't appear to do much when using netcat as a client of the socket REPL
19:23	frou	it does, I run `lein repl` then in the code sent via netcat, have (.close in) appended
19:24	amalloy	frou: right, but can you then reconnect and send another command?
19:24	ihodes	netcat can die. gnu's doesn't compile on osx, and osx's isn't compatible with gnu's. :(
19:24	amalloy	dur, never mind. you must be opening a new socket on each connectgion
19:25	frou	ihodes → i installed gnu 0.7.1 no sweat via homebrew
19:25	ihodes	frou: might have to try that. don't remember if i did. i just gave up pretty quickly to be honest.
19:26	pmbauer	I've seen the following idiom several times, what is the motivation? (defn somefunc [x] (let [x x] (...)))
19:27	technomancy	pmbauer: trying to use up _exactly_ 140 characters in a tweet maybe?
19:27	pmbauer	Ha! I can't understand the need for the local alias
19:27	pmbauer	...saw it in some of dnolen's code today.
19:28	dnolen	pmbauer: eh?
19:28	pmbauer	Ah! Hi. https://gist.github.com/888733 see lines 40, 44, and 48
19:28	dnolen	pmbauer: are you ignoring the type hints?
19:29	pmbauer	The type hint can't be put on the parameter?
19:30	dnolen	pmbauer: not in this case no, at least not when I wrote that code.
19:30	pmbauer	Ah. Thanks for the explanation, thought I was missing something.
19:30	dnolen	pmbauer: those aren't regular fns
19:31	pmbauer	protocol implementations ...
19:34	pmbauer	dnolen: One other q, on line 21 (compute [_] (.compute task)), I get a reflection warning for 'compute', yet all the other RecursiveTask methods resolve. Any idea why?
19:35	pmbauer	I double checked the signature in jdk7 just to check my sanity ...
19:35	dnolen	pmbauer: it's a protected method I think.
19:35	pmbauer	sigh staring me in the face. Thanks.
19:36	dnolen	pmbauer: didn't seem to matter in the end performance wise.
19:36	pmbauer	...trying to port a fork/join java algorithm to clojure. This was a great help. Thank you for the gist
19:36	dnolen	pmbauer: no problem! look forward to seeing that. haven't messed much with fork/join beyond that gist.
19:57	seancorfield	i try really hard not to respond to ken wesson... i really should know better... :(
20:00	dnolen	seancorfield: not … worth … it
20:01	seancorfield	in my defense, i'd just got back from the dentist and was unusually grumpy :)
20:04	technomancy	seancorfield: killfiles dude
20:04	ndimiduk	technomancy: have a moment?
20:05	seancorfield	that's a bit brutal - ken also posts some really interesting answers to questions :)
20:05	technomancy	ndimiduk: what's up?
20:05	technomancy	seancorfield: well actually I just have a filter that marks all his posts as already read
20:06	technomancy	but that's only because I don't know of a killfile implementation that's portable across emacs and android =\
20:06	ndimiduk	technomancy: i have a swank hook for adding cdt debugging jvm options to my project. it works when i invoke `lein swank` from the cli but when i use emacs clojure-jack-in i get an exception for passing 6 arguments to my hook fn. any ideas?
20:07	technomancy	ndimiduk: curious; can you gist the hook?
20:08	ndimiduk	technomancy: https://gist.github.com/1112864
20:09	hiredman	I imagine you need a & args in your hook
20:09	technomancy	ndimiduk: yeah, hiredman is right. you need to apply f to the project and args
20:09	technomancy	since swank takes optional args as well
20:10	ndimiduk	so, (defn swank-hook [f project & args] ...) ?
20:10	technomancy	aye
20:11	technomancy	and (apply f (assoc project [...]) args)
20:12	ndimiduk	ah!
20:12	ndimiduk	nice, that works.
20:12	ndimiduk	thanks guys
20:12	technomancy	np
20:21	ndimiduk	technomancy: do i need to do something special to have the lein process started by clojure-jack-in respect my $JAVA_HOME?
20:21	ndimiduk	(use 'swank.cdt) throws because it can't find tools.ja
20:21	ndimiduk	r
20:22	ndimiduk	which is in the lib in my $JAVA_HOME
20:22	clojurebot	Roger.
20:24	technomancy	ndimiduk: try setting JAVA_CMD to point to the right executable instead
20:25	amalloy	clojurebot: forget which
20:25	clojurebot	Pardon?
20:27	technomancy	ndimiduk: do you think it would be wise to search for the java executable using JAVA_HOME if JAVA_CMD is not set?
20:27	devn	ibdknox: cool.
20:27	devn	ibdknox: I like this REPL
20:27	ndimiduk	that sounds reasonable.
20:28	ndimiduk	try $JAVA_HOME/bin/java
20:28	ndimiduk	which is what i just set my $JAVA_CMD to
20:28	devn	ibdknox: I especially like the fancy-shmancy tab-completion. I think my next project is to try and get (doc) hooked up to gClosure in ClojureScript
20:28	technomancy	I'm a big fan of software that doesn't require JAVA_HOME to be set, but I guess if it is set, it's usually set for a reason
20:28	technomancy	ndimiduk: feel free to open an issue
20:28	ndimiduk	why would you prefer JAVA_CMD?
20:29	ndimiduk	this is the first time i've encountered that one
20:29	ndimiduk	also, i'm not sure why that should resolve my classpath correctly
20:29	technomancy	I think JAVA_CMD came from some autogenerated shell scripts from a maven plugin or something
20:30	ndimiduk	and it doesn't
20:30	technomancy	hm. I had that same issue of missing tools.jar, and it was from using a JRE instead of a JDK
20:30	technomancy	once I switched JAVA_CMD to point to java from a JDK, it worked fine
20:31	ndimiduk	not so for me.
20:31	ndimiduk	can i query the current classpath from within a repl?
20:32	ndimiduk	something off of System perhaps?
20:32	technomancy	(System/getProperty "java.class.path")
20:32	technomancy	or lein classpath
20:34	ndimiduk	interesting. i have nothing in my classpath which is not defined by my project
20:34	ndimiduk	so says (System/getProperty "java.class.path")
20:35	ndimiduk	it must be omitting some assumed entries. or the runtime appends to this list
20:35	technomancy	you may also want sun.boot.class.path?
20:35	ndimiduk	ah, there we have some system libs
20:35	ndimiduk	it's using a jre path
20:35	technomancy	that's the stuff that doesn't go through bytecode verification, etc
20:36	ndimiduk	haha.
20:36	ndimiduk	okay. $JAVA_HOME/bin/java is a symlink to ../jre/bin/java
20:38	ndimiduk	this is a full jdk; i have javac in $JAVA_HOME/bin
20:41	ndimiduk	`$ $JAVA_CMD -verbose:class \| grep tools` returns no results
20:42	ndimiduk	are you using openjdk? does that version of the java bin load additional libs?
20:44	technomancy	openjdk on ubuntu has it, yeah
20:44	choffstein	Hey all. I have a question for you -- I am doing some data set-up in a let statement and half-way through the statement I want to determine whether there is enough data to proceed or not. If not, I want to throw an error -- if there is, I want to proceed computing the data. What is the "clojure way" of doing this?
20:46	technomancy	,(let [x 2, _ (when (neg? x) (throw (Exception. "Positive numbers only plz"))) y (Math/sqrt x)] y)
20:46	clojurebot	1.4142135623730951
20:46	technomancy	you can do that; it's not great
20:46	amalloy	often you can just create the lazy seqs representing the processing of your data unconditionally, and then later only force it if the condition is met
20:47	choffstein	technomancy: yeah, I really don't like the use of _ for creating side-effects and what-not.
20:47	choffstein	amalloy: can you expand on that a bit?
20:48	choffstein	oh, wait, nope. re-read … I think I understand.
20:48	choffstein	how can I be sure that my process will be lazy?
20:52	amalloy	uhhh. only use lazy functions to operate on it? not very helpful, but there's not a lot of specific things to say
20:54	hugod	ndimiduk: it is my understanding that openjdk automatically adds tools.jar, while sun jdk does not - see "Sun/Oracle JDK" in https://github.com/pallet/ritz
21:28	tmountain	is this the preferred (and fastest?) way to convert an ArrayList to a vector? (into [] array-list)
21:29	amalloy	preferred is probably: "are you sure you need to do it?"
21:30	tmountain	well, I'm calling some Java code that returns an ArrayList, so I don't have much choice in that regard
21:30	amalloy	tmountain: but is there a reason you need a vector, is my point. java's collections can be worked with as seqs
21:31	amalloy	&(seq (java.util.ArrayList. [1 2 3 4]))
21:31	lazybot	⇒ (1 2 3 4)
21:31	tmountain	oh, I see
21:31	tmountain	that makes life easier, thanks!
21:31	amalloy	i mean, the seq isn't random-accessible anymore
21:33	tmountain	what you're saying is it acts like a seq, not a vec, right?
21:33	amalloy	right
21:33	tmountain	I gotcha, thanks for the help
21:39	scottj	hugod: ndimiduk: I thought it was openjdk that didn'thave tools.jar on cp by default, at least on ubuntu
21:42	ndimiduk	this is sun's java
21:42	scottj	maybe it's both
21:45	scottj	ritz with openjdk source is pretty sweet, you can step through not only your code, the clojure code, but the jvm code too
21:45	jcromartie	wow, I just realized exactly how powerful a remote slime REPL is
21:45	jcromartie	:P
21:45	scottj	mars lander?
21:46	scottj	be sure to do it over ssh
21:46	jcromartie	yes
21:46	jcromartie	what about a mars lander?
21:46	jcromartie	I've heard NASA uses some similar kind of technology
21:46	scottj	there wassome famous lisp project like that that had a repl jpl or someone used to debug something far away
21:46	jcromartie	yeah
21:47	jcromartie	but I like the idea that I can have the files on my local machine, and hit C-c C-k and fix a problem live
21:47	jcromartie	if I absolutely have to cowboy code it
22:01	nowhere_man	scottj: just saw your closing of my issue with SLIME disconnecting, would it be a daunting task to make swank-clojure play nice with recent SLIME?
22:02	scottj	nowhere_man: I don't think so, just no one's done it
22:03	scottj	nowhere_man: hugod's fork ritz works with a more recent version
22:03	scottj	nowhere_man: I would be really happy to have swank-clojure work with latest slime, but technomancy had a bad experience following master on slime in the past
22:04	hugod	still nowhere near current, but my aim was always to get it up to date,
22:04	hugod	ritz works with slime-autodoc
22:04	scottj	swank-clojure does too (for me)
22:05	scottj	but I use a different slime version than the recommended one
22:06	scottj	I think it would be cool to have a auto-complete mode for dependencies in project.clj so where it completes the name and version based on clojars
22:06	tomoj	there's an index you can download, right?
22:07	hugod	I believe lein already downloads it
22:07	hugod	~/.lein/clojars
22:07	clojurebot	Huh?
22:08	scottj	hugod: nice didn't know about that
22:08	tomoj	http://clojars.org/repo/feed.clj.gz
22:08	tomoj	I don't have ~/.lein/clojars
22:08	tomoj	oh, lein-search writes it
22:09	scottj	if anyone writes a mode like that please post it to ml, otherwise I'll probably take a stab at that soon now that I know about ~/.lein/clojars
22:09	tomoj	whoa
22:10	tomoj	scm repos in that index
22:10	nowhere_man	hugod: I did lein install plugin and added dev-deps to my project, but on lein ritz, I get java.lang.ClassNotFoundException: com.sun.jdi.VirtualMachine
22:10	nowhere_man	is it something leiningen doesn't check for?
22:11	hugod	it is require by the jpda debugger - see the Sun/Oracle JDK section of the readme
22:11	tomoj	scottj: need a primitive clojure reader in elisp? or rely on running slime?
22:12	scottj	hugod: note I have that issue with openjdk
22:12	hugod	nowhere_man: it is tools.jar that you have to get on the classpath
22:12	hugod	scottj maybe they both need it then…
22:14	scottj	tomoj: yeah i was thinking of using slime and basing it on ac-slime.el, but not using slime would be better
22:18	nowhere_man	hugod: added /usr/lib/jvm/java-6-openjdk/lib/tools.jar to .lein-classpath to no avail...
22:20	nowhere_man	hugod: nevermind, I didn't find anything else in lein's online help but I just stumbled on `lein help sample`
22:20	hugod	nowhere_man: maybe try :dev-resources-path
22:20	scottj	nowhere_man: see ritz readme
22:23	scottj	I'm still amazed no one seems to care about clojure-refactoring
22:23	hugod	btw, still looking for any input on https://github.com/pallet/ritz/issues/14 - how to filter/manage which exceptions break into the debugger
22:24	nowhere_man	ha, shit, I thought these sections were exclusive, I only read the one for lein
22:25	hugod	keep meaning to try clojure-refactoring, but never did…
22:26	scottj	it's awesome
22:26	scottj	but there are some bugs. I really like the thread-first, thread-last, unthread refactorings
22:26	nowhere_man	ooOOooOo, it works!
22:26	nowhere_man	I'll finally be able to play with Clojure, great!
22:27	nowhere_man	thanks a lot, you all
22:28	hugod	nowhere_man: ritz still has some rough edges…issues welcome
22:28	scottj	hugod: did you ever get a response to your -dev locals clearing request?
22:28	hugod	scottj: not from core
22:29	nowhere_man	hugod: one of the greatest pleasures in using free software is seeing bugs fixed, so I'll happily file issues...
22:29	hiredman	I thought rhickey replied
22:29	hiredman	something like "I dunno what the best way to do this is"
22:29	hugod	hiredman: earlier on in the year
22:30	hugod	a dynamic var controlling the locals clearing would be fine with me
22:32	hugod	that could be set by emacs using a prefix for C-c C-c or C-c C-k
22:33	hiredman	more hooks for the compiler would be nice in general
22:59	jcromartie	hm... form validation in sandbar look complicated
23:23	scottj	jcromartie: maybe look at valip or noir
23:23	jcromartie	I just wrote this https://gist.github.com/1113067
23:24	jcromartie	I achieved my goals :)
23:24	jcromartie	seems to be sufficient for a decoupled validation lib
23:24	jcromartie	the results can be passed to the view layer
23:25	jcromartie	and the view doesn't need to know anything about validation itself
23:26	alandipert	jcromartie: neato
23:26	alandipert	jcromartie: lines 18/19 could be (when-let [x (get m k)]...)
23:26	jcromartie	yes
23:27	jcromartie	actually
23:27	jcromartie	no
23:27	jcromartie	because if the form was not submitted, then there will be no key in the params map
23:27	jcromartie	this only validates when the form was actually submitted
23:27	alandipert	that's ok, get returns nil on not found (by default)
23:28	jcromartie	no, I mean when the key is not present I don't want to validate at all
23:28	alandipert	oh i gotcha
23:28	jcromartie	but when it's present and nil, then it's an error
23:28	jcromartie	although... hm
23:29	jcromartie	I'm not sure if that's secure
23:46	kephale	hopefully an easy leiningen question: how does one refer to files in the resources directory in a portable way (so it works in an uberjar)?
23:49	hiredman	kephale: clojure.java.io/resource
23:50	kephale	hiredman: hoorah, thank you
23:55	jcromartie	now with infinity% more tests!
23:55	jcromartie	https://gist.github.com/1113067