#clojure – 2010-09-03

2010-09-03

00:27	Bahman	Hi all!
01:05	blais	Q: Is is possible to redefine the dispatch-fn of a multimethod in a running environment?
01:05	blais	i.e., I use Emacs, I eval gradually. I want to change the dispatch function of a multimethod. Doesn't seem to work.
01:05	blais	Any idea?
01:06	kumarshantanu	hi, can anybody point me to a code sample that uses flash messages in ring/compojure?
01:08	wwmorgan	blais: the defmethod behavior was changed with 1.2. It now has defonce semantics
01:08	wwmorgan	*defmulti
01:08	Raynes	blais: In Clojure 1.2, defmulti got defonce semantics, meaning it'll only be eval'd once. You can probably ns-unmap it and re-eval it though.
01:09	Raynes	(doc ns-unmap)
01:09	clojurebot	"([ns sym]); Removes the mappings for the symbol from the namespace."
01:09	wwmorgan	apparently, (def foo nil) will also work
01:09	Raynes	Or that.
01:10	scottj	kumarshantanu: I don't think there are any.
01:11	kumarshantanu	scottj: I am looking to use flash messages (now added in ring), but not sure what's the syntax etc
01:11	kumarshantanu	scottj: so any doc link may also be useful
01:15	scottj	kumarshantanu: I think you'll have to either write an email to ring mailing list asking for an example or figure it out from the code.
01:30	blais	Raynes: thx man.
01:31	blais	wwmorgan: thx.
01:33	kumarshantanu	scottj: thanks, I am experimenting with the flash middleware
01:37	scottj	kumarshantanu: if you come up with a simple example please post it
01:37	kumarshantanu	scottj: sure
02:04	luc4s	Hi. I'm learning Clojure and have a little problem.
02:04	luc4s	How can I transform this: ("1" "2" "3") ("a" "b" "c") into this: (["1" "a"] ["2" "b"] ["3" "c"])
02:05	wwmorgan	,(map vector '("1" "2" "3") '("a" "b" "c"))
02:05	clojurebot	(["1" "a"] ["2" "b"] ["3" "c"])
02:06	luc4s	:wwmorgan thanks a lot. I was like a couple of hours struggling with that and interleave and etc.
02:08	wwmorgan	,(partition 2 (interleave '("1" "2" "3") '("a" "b" "c"))) ;-) is another way to do it, if you don't need vectors
02:08	clojurebot	(("1" "a") ("2" "b") ("3" "c"))
02:09	luc4s	oh, no. I need the vectors for a func I made already hehe
02:10	luc4s	thanks again. Clojure is a fantastic language, but a little hard for a imperative c++ programmer like myself
02:37	kumarshantanu	scottj: got the flash thing working, but it's a bit involved
03:19	LauJensen	Is there a cake option for adding arbitrary options to the jvm at compile time?
03:20	LauJensen	.cake/config => project.java_opts = ...
03:20	scottj	kumarshantanu: sweet, have a basic example you can gist or something?
03:21	noidi	LauJensen, did that work?
03:21	LauJensen	testing now
03:21	kumarshantanu	scottj: I will...I am re-factoring few things -- will post a gist
03:21	scottj	kumarshantanu: or a summary? you return a map with a :flash key and a redirect status/url and then on the redirect url you pull out the flash?
03:21	LauJensen	yes it did noidi
03:21	scottj	kumarshantanu: cool
03:22	noidi	I've never used cake, but just looking at the source, setting CAKE_JAVA_OPTS might work http://github.com/ninjudd/cake/blob/master/bin/cake
03:22	noidi	Cake looks interesting, I should really give it a try some day
03:23	LauJensen	agreed :)
03:23	octe	how do i require multiple things in an ns-declaration? i tried this: http://pastebin.com/xKqwACtC but it's not correct..
03:24	noidi	once I get over this damn flu... I'd be at work now if I had the energy to write Clojure code :P
03:24	bartj	I think it is not possible to import all the classes in a package like in Java, is this correct ?
03:24	kumarshantanu	scottj: essentially, [1] you wrap the handler -- (wrap-session (wrap-flash handler)) [2] use the wrapped handler in ring-jetty-adapter [3] retrieve flash using {flash :flash} on the route definition and [4] to emit flash messages you simply assoc the body map with :flash as key and whatever as value
03:24	bartj	for eg: import org.apache.http.* would translate to:
03:25	bartj	(:import org.apache.http *) ?
03:26	LauJensen	correct, its not possible
03:39	kumarshantanu	scottj: I created a gist -- http://gist.github.com/563552
03:40	scottj	kumarshantanu: cool, you don't need var and future on run-jetty
03:40	scottj	oh nevermind forget that
03:42	kumarshantanu	scottj: i copy-pasted from my Eclipse IDE -- I use future and defonce for interactive web development
03:43	scottj	I was confusing var/future for :join? false/future
04:02	LauJensen	Has anyone here had trouble compiling a project which imports JFreeChart ?
04:08	springify	Hello everybody. I'm trying to use leiningen 1.3.0 as dependency in a project.clj, but there doesn't seem to be a copy of it on clojars. Does anybody know of a repository that I could use, or do I have to compile and install locally?
04:12	kumarshantanu	springify: you might as well raise a ticket on Leiningen -- asking to push to Clojars
04:14	springify	kumarshantanu: True, just wanted to know whether I missed something.
04:17	springify	Done: http://github.com/technomancy/leiningen/issues#issue/106
04:18	kumarshantanu	springify: just noticed the issue - it says "Release leiningen 1.5"
04:18	springify	Heh, no, just edited. Hit the return key accidentally.
04:18	kumarshantanu	springify: the next planned release is 1.3.1 as far I know
04:19	springify	kumarshantanu: There doesn't seem to be anything beyond 1.1.0 on clojars at the moment, so 1.3.0 would be quite a step forward.
04:21	kumarshantanu	springify: Lein on Clojars may be useful for writing plugins I guess -- is that the purpose if I may ask?
04:23	springify	kumarshantanu: I'm maintaining a branch of lein-cuke, (cuke4duke with leiningen), which depends on leiningen, yes.
04:27	kumarshantanu	springify: this is cool (googled them), thanks for sharing the details
04:30	springify	kumarshantanu: You're welcome. I can only claim credits for providing the project.clj and a single fix, tho :)
04:31	kumarshantanu	**time for lunch...ciao
04:31	yayitswei	quick question: what's the equivalent of clojure.set/select for lists? for example I want to write (select #(> % 2) '(1 2 3 4))
04:32	yayitswei	;; => (3 4)
04:33	LauJensen	filter comes to mind
04:33	Raynes	-> (filter #(> % 2) '(1 2 3 4))
04:33	sexpbot	=> (3 4)
04:33	yayitswei	ah, that's exactly what i was looking for
04:34	LauJensen	-> (remove #(< % 2) '(1 2 3 4))
04:34	sexpbot	=> (2 3 4)
04:34	yayitswei	or remove too.. thanks guys
04:34	LauJensen	np
04:35	ordnungswidrig	LauJensen: I will not higlight you, as cuke was mostly a drop-in. :-)
04:35	LauJensen	cuke-de-duke? :)
04:36	ordnungswidrig	cuke-de-cake, actually :)
04:36	LauJensen	Its amazing how poor security webmail clients have. Sometimes when I get referrers in my stats, I can see how has sent somebody an email about one of my blogposts
04:36	ordnungswidrig	LauJensen: I noticed that too.
04:36	LauJensen	You've been checking my referrers?
04:38	ordnungswidrig	LauJensen: I used the referrer from one of my blog posts to login into your webmail and to gain access to your blog to check your referrers :)
04:38	LauJensen	thats an awesome feat, especially considering I dont have a webmail :)
04:38	ordnungswidrig	doh
04:42	esj	<greetings>All<Special Greeting>LauJensen</Special Greeting></greetings>
04:42	esj	:P
04:42	LauJensen	Greetings and salutations esj! :) Whats the the XML, you started greeting people in Maven? :)
04:43	esj	correct in one :)
04:43	esj	of course, in future, I just need to go $mvn greet
04:43	esj	and I'm done :)
04:44	LauJensen	Well - Its not a real Maven vs Sane Tools smackdown before we have a blogpost :) I'll cook something up
04:45	esj	lol
04:49	LauJensen	I cant decide "Wasting your life like a pro - Maven" or "Wasting your customers money - Maven", which is better?
04:49	LauJensen	I mean, they're both terrible accurate...
04:53	bobo_	i think the first one
04:53	bobo_	not everyone has customers
04:53	bobo_	and sometimes, its the customers choice
04:58	LauJensen	Exactly what I thought :)
04:59	LauJensen	Or maybe its because Maven is just too foreign to real programmers, maybe I should write a tutorial instead "Set up Maven in just 42 weeks"
04:59	LauJensen	ok enough, we have to stop before cemerick wakes up :)
05:00	bobo_	well, i have an ant build for the project i am working on now... maybe i shouldnt yell at maven
05:01	esj	Its the best thing I've used, super potent and easy, but as discussed, I haven't checked out cake yet.
05:01	lancepantz_	member:LauJensen: justin mentioned that you were thinking about writing a post on cake?
05:02	esj	and if I can goad Lau into doing my research for me, so much the better ;P
05:02	LauJensen	lancepantz_: Thats right
05:02	lancepantz_	awesome
05:02	lancepantz_	i'm working on the task system ATM
05:03	LauJensen	awesome begets awesome, now the pressures on me to write a good post :)
05:03	lancepantz_	we whiteboarded some really cool stuff today, i
05:03	lancepantz_	'm excited ot get it in
05:03	LauJensen	details details! :)
05:04	lancepantz_	adding a deffile macro that's similar to deftask
05:04	lancepantz_	*defile
05:04	LauJensen	deffile is very differnt from defile
05:04	lancepantz_	takes in a string thats the name of the file you want build
05:04	bartj	er, how would one go about translating this Java stmt to Clojure ?
05:04	lancepantz_	hehe, i like defile :)
05:04	bartj	org.apache.http.client.HttpClient client = new DefaultHttpClient();
05:04	LauJensen	lancepantz_: I dont, keep it clean
05:04	esj	lol
05:04	LauJensen	(let [client (DefaultHttpClient.)]
05:05	bartj	LauJensen, no that doesn't work - I tried that
05:05	lancepantz_	in the spirit of defn instead of deffn then :)
05:05	LauJensen	bartj: thats the translation though, so something else is wrong
05:05	LauJensen	(let [client ^org.apache.http.client.HttpClient (DefaultHttpClient.)] ... ?
05:06	lancepantz_	the defile dependences are a set of files that are the source files for the file being generated
05:06	lancepantz_	and the macro compares the timestamps to see if it need to be ran
05:06	lancepantz_	so something like
05:07	lancepantz_	(defile "pom.xml" #{"project.clj"} (prxml [pomstuff]))
05:08	lancepantz_	then the task will only generate a new pom when either it doesn't already exist, or pom.xml is older than project.clj
05:08	lancepantz_	it's going to clean the code up quite a bit
05:08	LauJensen	nice
05:09	lancepantz_	(defile "lib/.class" #{src//.clj} (compile blah blah..))
05:10	lancepantz_	(defile "lib/.class" #{"src//.clj"} (compile blah blah..)) actually
05:10	LauJensen	So this goes into the optimization category
05:10	LauJensen	Im excited to see how much mileage you'll get out of Ivy
05:11	lancepantz_	yeah, i think we're vectoring in on the feature set we want for 1.0
05:11	lancepantz_	me too, ivy looks great
05:11	ordnungswidrig	does cake only work on files as a resource? or can the artefacts that came out of a build step other things as well?
05:11	lancepantz_	there was a guy working on a patch for it, but i think he's gotten busy
05:11	LauJensen	Just make sure you weed out the bugs before 1.0 comes - I'm posting one today, if I didn't already
05:12	Raynes	lancepantz_: I found a bugzors.
05:12	lancepantz_	ordnungswidrig: you mean build things other than files?
05:13	ordnungswidrig	lancepantz_: yes
05:13	lancepantz_	example?
05:13	clojurebot	examples is http://en.wikibooks.org/wiki/Clojure_Programming/Examples/API_Examples
05:13	lancepantz_	Raynes: is it with the jvm restarting?
05:13	Raynes	lancepantz_: Nosir.
05:13	lancepantz_	sup?
05:13	ordnungswidrig	simple example: data into database
05:13	Raynes	lancepantz_: 'open' times out way, way too quickly in the download function.
05:14	Raynes	lancepantz: On a slow connection, there is absolutely no chance of it completing.
05:14	Raynes	Oh a really, really slow connection, anyway.
05:14	Raynes	;)
05:14	lancepantz_	ordnungswidrig: ahh, well yeah, anything you can do in clojure you can do in a cake function
05:14	ordnungswidrig	more abstract example: a build tool is basically a set of functions wired together with memoization (ideally). Some work on files and file stamps like make. Some work on abstractly defined dependencies like ant.
05:15	LauJensen	ordnungswidrig: I have a build now, which when you run uberjar, pulls down a database spec, compiles an embedded database and includes it in the jar for sweet sweet deployment :)
05:15	lancepantz_	Raynes: ah, i believe it, get up with ninjudd tomorrow, he's been working on all that stuff
05:15	Raynes	lancepantz_: I think the timeout is like 1 minute. Ruby 1.9 apparently has a :read_timeout parameter that can be passed to open, but I don't think there is a way to handle that without hopping over to net/http in Ruby 1.8.
05:15	ordnungswidrig	LauJensen: in cake?
05:15	LauJensen	ordnungswidrig: Yes
05:15	Raynes	lancepantz_: Will do. Just waiting on him. :D
05:15	LauJensen	Raynes: Just post an issue on Github, these guys work FAST :)
05:15	ordnungswidrig	LauJensen: would this be possible in leiningen?
05:16	Raynes	I'll be up for a while. If I can't talk to ninjudd before I go to sleep, I'll make an issue.
05:16	LauJensen	ordnungswidrig: Yea I think so, but not as elegantly - I've overriden the compile task
05:16	LauJensen	or, extended it actually
05:16	lancepantz_	ordnungswidrig: yeah, you are describing dependency based programming, which was our whole goal for the project
05:16	lancepantz_	all the other stuff was just afterthoughts :)
05:18	ordnungswidrig	cool. I once did a prototype for a java build tool (which used ant internally for jump start). It could either build a jar if needed (e.g. to build a .war) or it skipped automatically the jar part if only the compiled classes were needed.
05:18	lancepantz_	right, exactly
05:19	adben	morning *
05:19	lancepantz_	we're setting up an engineering blog and i'm going to write up a really detailed post explaining the need for it
05:21	yayitswei	another question for you guys.. why doesn't -> work with anonymous functions? for example, (-> 1 #(+ % 2 3))
05:21	yayitswei	i would expect => 6
05:23	lancepantz_	,(-> 1 (partial + 2 3))
05:23	clojurebot	#<core$partial$fn__3678 clojure.core$partial$fn__3678@60bb22>
05:25	lancepantz_	yayitswei: i would expect that as well
05:25	tomoj	,(read-string "#(+ % 2 3)")
05:25	clojurebot	(fn* [p1__4395#] (+ p1__4395# 2 3))
05:26	tomoj	,(macroexpand-1 '(-> 1 #(+ % 2 3)))
05:26	clojurebot	(fn* 1 [p1__4396#] (+ p1__4396# 2 3))
05:27	yayitswei	hmm. or a better question: what's the idomatic way to rewrite that?
05:28	yayitswei	let's say, (-> 1 #(+ % 2 3) println)
05:28	tomoj	(println (+ 1 2 3)) ?
05:28	noidi	yayitswei, you'll have to write it as (#(...))
05:28	yayitswei	,(println (#(+ % 2 3) 1))
05:28	clojurebot	6
05:29	Raynes	->(-> 1 (#(+ % 2 3)))
05:29	sexpbot	=> 6
05:29	yayitswei	ooh
05:30	yayitswei	(-> (-> 1 #(+ % 2 3) ) println)
05:30	yayitswei	,(-> (-> 1 #(+ % 2 3) ) println)
05:30	clojurebot	java.lang.ClassCastException: java.lang.Integer cannot be cast to clojure.lang.ISeq
05:30	noidi	,(macroexpand '#(println %))
05:30	clojurebot	(fn* [p1__4407#] (println p1__4407#))
05:31	noidi	so the #() expands to the list above
05:31	noidi	and -> will stick the result of the previous expression as the second item in that list
05:31	noidi	,(macroexpand '(-> 123 #(println %)))
05:31	clojurebot	(fn* 123 [p1__4410#] (println p1__4410#))
05:31	noidi	which does not make any sense
05:31	noidi	so you'll get an error
05:32	noidi	,(macroexpand '(-> 123 (#(println %))))
05:32	clojurebot	((fn* [p1__4413#] (println p1__4413#)) 123)
05:32	noidi	but that works, because the first item in the list is a function, and the second is its argument
05:33	yayitswei	what does fn* mean?
05:35	Raynes	(doc fn*)
05:35	clojurebot	Gabh mo leithscéal?
05:35	yayitswei	ohhh but i get your meaning
05:35	yayitswei	so i should write it as ,(-> 1 (+ 2 3) println)
05:35	yayitswei	,(-> 1 (+ 2 3) println)
05:35	clojurebot	6
05:37	LauJensen	,(-> 1 (+ 2 3))
05:37	clojurebot	6
05:37	LauJensen	Isnt that good enough? :)
05:38	LauJensen	Oh I see I missed a larger discussion :\|
05:39	noidi	I don't really understand the opposition to adding a variant of -> that places the threaded value at a marked position
05:39	LauJensen	noidi: -> ->> is all you need IMO
05:39	yayitswei	yep! thanks guys. I didn't fully understand what -> did
05:39	LauJensen	yayitswei: You got it now?
05:39	yayitswei	yeah
05:40	yayitswei	funny because you can't google ->
05:40	noidi	,(doc ->)
05:40	clojurebot	"([x] [x form] [x form & more]); Threads the expr through the forms. Inserts x as the second item in the first form, making a list of it if it is not a list already. If there are more forms, inserts the first form as the second item in second form, etc."
05:40	yayitswei	ahh
05:40	LauJensen	yayitswei: Yea, thats how we get so many members in #clojure
05:40	noidi	yayitswei, when you are not sure what a macro does, macroexpand and macroexpand-1 are your friends
05:41	tomoj	noidi: "rich said no" isn't enough for you? :P
05:41	yayitswei	haha cool, will try that next time
05:42	noidi	tomoj, heh, well, that's a good reason I guess :)
05:43	ordnungswidrig	not be able to google for "->" and so on is a problem for haskell and scala, too.
05:43	ordnungswidrig	but the haskell guys have solved the problem
05:44	yayitswei	ordnungswidrig: how did they solve it?
05:47	ordnungswidrig	yayitswei: they have hoogle and hayoo
05:47	ordnungswidrig	yayitswei: Hoogle is a Haskell API search engine, which allows you to search many standard Haskell libraries by either function name, or by approximate type signature.
05:47	ordnungswidrig
05:47	ordnungswidrig
05:48	yayitswei	member:ordnungswidrig: nice, looking at it now
05:48	noidi	,(find-doc "Thread")
05:48	clojurebot	------------------------- hiredman.schedule/task-runner nil ScheduledThreadPoolExecutor for scheduling repeated/delayed tasks ------------------------- clojure.core/-> ([x] [x form] [x form & more]) Macro Threads the expr through the forms. Inserts x as the second item in the first form, making a list of it if it is not a list already. If there are more forms, inserts the first form as the second item in second form, etc.
05:49	yayitswei	we have our trusty clojurebot
05:50	ordnungswidrig	the power of the type system is apparent when you search for a function with a signature, say (a -> b -> b) -> b -> [a] -> b) and you get foldr as a result
05:51	LauJensen	I keep getting referers from here https://secure.wikimedia.org/wikipedia/en/wiki/Main_Page , can anybody work out why?
05:52	ordnungswidrig	LauJensen: maybe real path is cut because it is a secured connection?
05:52	LauJensen	maybe
05:53	ordnungswidrig	Or somebody playing a joke on your logfile?
05:53	LauJensen	Not possible
05:53	LauJensen	Unless you mean, by way of referrer spam
05:57	ordnungswidrig	Not possible? I can do a curl -H'Referer: https://secure....' https://secure.wikimedia.org/wikipedia/en/wiki/Main_Page can't I?
06:01	Raynes	ordnungswidrig: Once clojuredocs has an API, we'll have that as well.
06:01	Raynes	I mean, we have it now, but once we have an API, it can be integrated with the bots.
06:03	LauJensen	ordnungswidrig: Yes, thats referrer spam
06:03	LauJensen	(ps: if you dont highlight me, chances are I wont look)
06:05	ordnungswidrig	LauJensen: ok, I think some day, we can manage on a proper mutual highlighting policy :)
06:09	ordnungswidrig	can I search for a ns where a symbol / function is defined?
06:25	LauJensen	M-. fn
06:25	LauJensen	@ ordnungswidrig
08:14	arnorhs	whazzup
08:14	arnorhs	Are there any stable zero mq bindings for clojure? You just use the java ones right?
08:14	arnorhs	Do you think they can be set up using lein ?
08:16	dnolen	arrnorhs: yeah use the zeromq java bindings. you'll probably want to use native-deps for that.
08:19	mrBliss	is there a reason for the absence of (copy ^URL *) in the io libraries?
08:19	stuartsierra	mrBliss: nobody wrote it
08:20	mrBliss	I have written the 3 needed methods if you want them (thanks goes to LauJensen)
08:20	stuartsierra	cool, post to the mailing list and we'll take a look
08:20	mrBliss	alright
08:21	mrBliss	clojure or clojure-dev?
08:22	stuartsierra	mrBliss: clojure
08:32	mrBliss	could it be that ^Writer on this line should be changed to ^File? http://github.com/clojure/clojure-contrib/blob/b6c6f0fa165975c416c7d135d1a844353527493b/src/main/clojure/clojure/contrib/io.clj#L468
08:33	stuartsierra	clojure.contrib.io is slated for removal anyway
08:35	mrBliss	copy's also deprecated I see, so should I continue?
08:35	stuartsierra	all that has moved to clojure.java.io
08:35	stuartsierra	Further development will continue there.
08:35	mrBliss	ok I see
08:37	mrBliss	same remark as before: shouldn't the ^Writer on this line be changed into ^File? http://github.com/clojure/clojure/blob/3a3374f714e5a755b7de2a761f37696f07a74e80/src/clj/clojure/java/io.clj#L365
08:38	stuartsierra	yes, although it doesn't actually matter
08:42	Licenser	greetings my lispy friendsw
08:42	Licenser	is guthub acting odd for someone else? I have mails that there should be something in my fork thingy but it says everything up to date o.O
08:51	kumarshantanu	can anybody help me understand how to express (if cond step1 else-step-2-and-step3)
08:51	mrBliss	(if cond step1 (do step2 step3))
08:51	kumarshantanu	step2 and step3 are independent
08:51	kumarshantanu	mrBliss: will (do ...) return the value that step3 returns?
08:51	mrBliss	correct
09:06	mrBliss	stuartsierra: post sent
09:28	bartj	, (doc do)
09:28	clojurebot	It's greek to me.
09:29	bartj	the error - " Unable to resolve classname" occurs because the class was not imported ?
09:30	chouser	probably
09:30	bartj	chouser, what could be the other reasons ?
09:32	bartj	if I have the following line in Java: org.apache.http.client.HttpClient client = new DefaultHttpClient();
09:33	bartj	the DefaultHttpClient is present in org.apache.http.client
09:33	bartj	I am sorry, DefaultHttpClient is present in org.apache.http.impl.client
09:34	bartj	and HttpClient is present in org.apache.http.client
09:34	bartj	so, while importing the java classes, I have something like:
09:34	bartj	(:import [org.apache.http.client.HttpClient] [org.apache.http.impl.client.DefaultHttpClient])
09:35	bartj	still, I get a Unable to resolve classname error
09:35	bartj	can someone please point what I am doing wrong ?
09:35	mrBliss	try (:import [org.apache.http.client. HttpClient]
09:35	mrBliss	[org.apache.http.impl.client DefaultHttpClient])
09:35	mrBliss	note the spaces
09:35	mrBliss	(remove that trailing dot from client.)
09:36	raek	does that work with the vectors?
09:36	mrBliss	yes
09:36	mrBliss	[package.subpackage Class]
09:36	stuartsierra	vectors should be lists there
09:36	raek	parantheses are the most commonly used for prefix lists
09:36	bartj	LauJensen, told me that they were one and the same!
09:36	stuartsierra	That's an implementation detail.
09:36	stuartsierra	It just happens to work.
09:37	raek	(ns foo.bar (:import org.apache.http.client.HttpClient org.apache.http.impl.client.DefaultHttpClient))
09:37	raek	(ns foo.bar (:import (org.apache.http.client HttpClient) (org.apache.http.impl.client DefaultHttpClient)))
09:38	raek	so, using 1-vectors happens to be the same as the infamous empty-prefix-list
09:38	bartj	raek: I am assuming your last import is the correct one ?
09:38	raek	yes
09:39	raek	it is the way I have learned that it should be done
09:39	raek	(please correct me, someone, if I have learned the wrong thing)
09:39	bartj	ok, I now get an error that makes sense!
09:40	raek	anyway, (:import [org.apache.http.client.HttpClient]) is treated like (:import (org.apache.http.client.HttpClient))
09:40	chouser	stuartsierra: why are parens preferred?
09:40	raek	that is, import nothing from the "org.apache.http.client.HttpClient" package
09:40	stuartsierra	chouser: 'Cause that's what the docs say, dammit!
09:40	bartj	raek, org.apache.http.client.HttpClient is not the same as org.apache.http.client HttpClient !
09:40	bartj	raek, why so ?
09:41	chouser	stuartsierra: hm. good point.
09:41	raek	no
09:41	raek	foo.bar.A is the same as (foo.bar A)
09:41	raek	foo.bar.A foo.bar.B is the same as (foo.bar A B)
09:41	bartj	ok, then the only change that I did was to convert [] to ()
09:42	raek	you need to either drop the parens or replace the last period with a space
09:43	bartj	I did both
09:43	raek	(:import (foo.bar)) means "for all elements of the emply list, import them from the foo.bar package"
09:43	bartj	and thinks seem to work fine
09:44	raek	ok, great!
09:44	raek	what does your :import look like now?
09:45	bartj	(:import (foo1 bar1) (foo2 bar2))
09:46	bartj	I previously had:
09:46	bartj	(:import [foo1.bar1] [foo2.bar2])
09:48	bartj	I wonder why that is wrong!
09:48	raek	the previous?
09:48	bartj	yes, my last statement
09:49	raek	because of how it's implemented, it gets treaded as (:import (foo1.bar1) (foo2.bar2)) would have
09:50	raek	since you should only use vectors when passing options, iirc
09:50	raek	do you understand how (:import (foo1.bar1) (foo2.bar2)) is interpreted?
09:50	bartj	no
09:52	raek	but you understand how (foo.bar X Y Z) would be interpreted, right?
09:52	bartj	can you please explain
09:52	bartj	yes, import the classes X Y Z of package foo.bar
09:53	raek	now, imagine that you import no classes from package foo.bar... how would that be written?
09:53	bartj	(:import (foo.bar '()))
09:54	raek	(foo.bar X Y) = two classes, (foo.bar X) = one class, (foo.bar) = zero classes
09:54	bartj	ok
09:54	raek	your example has an empty list where the first class should go
09:54	bartj	yes, right - just (foo.bar)
09:54	raek	exactly
09:54	bartj	I think I was trying to be a bit clever - unnecessarily
09:55	raek	it's too bad that it doesn't signal any error when you do that
09:55	raek	since I don't think anyone wants to import zero number of classes
09:55	bartj	ok
09:56	bartj	so (:import (foo1.bar1) (foo2.bar2))
09:56	bartj	actually don't make sense
09:56	bartj	because you don't specify any classes for the packages ?
09:56	chouser	it really ought to print a warning
09:56	bartj	am I correct ?
09:57	bartj	I am sorry, I gotta run
09:58	bartj	raek, thanks a lot
10:26	hugod	is there any way (defn f [a b c :as argv] ..) could work?
10:26	chouser	(defn f [ & [a b c :as argv]] ...)
10:29	hugod	how about (defn f [a b & c :as argv] ..)
10:30	chouser	the parameter lists given to fn's are not destructuring. Instead you can provide multiple arg lists, one of which may use &
10:31	chouser	:as is a destructuring feature
10:31	chouser	so in your example, if you want argv to be all args and c to be a seq starting with the third arg, you still need to use destructuring on the entire arg list
10:31	hugod	destructuring works well with map arguments :)
10:32	chouser	(defn f [ & [a b & c :as argv]] ...)
10:32	hugod	but as you say (defn f [& [a b & c :as argv]] (println argv)) works
10:32	hugod	thanks
10:40	stuartsierra	hello, contrib committers
10:40	stuartsierra	?
10:43	chouser	uh.. um... ahem, yes?
10:43	stuartsierra	I'm working on a versioning / release policy for the modularized contrib
10:44	stuartsierra	with the goal to get people committing again
10:44	chouser	hm.
10:44	stuartsierra	Trying to figure out how to handle dependencies.
10:44	chouser	policies will increase motivation?
10:44	stuartsierra	Well, I want to make it easier to release a module with a stable version number.
10:44	chouser	ok, I can see the benefit there.
10:45	stuartsierra	So that modules can improve independently from the monolithic clojure-contrib
10:45	stuartsierra	But that raises questions, such as...
10:45	stuartsierra	Which version of Clojure (core) should modules depend on?
10:46	stuartsierra	Maven supports inclusive/exclusive ranges such as "[1.0.0,2.0.0)" meaning any version >= 1.0.0 but less than 2.0.0
10:49	stuartsierra	Right now, all sub-modules inherit the Clojure dependency (pegged at 1.2.0) from a "parent" module.
10:50	chouser	can that be tweaked per-module?
10:50	stuartsierra	yes
10:50	chouser	sounds good.
10:50	stuartsierra	So I think the default should be something fairly broad, like "[1.0.0,2.0.0)", which individual modules can override.
10:51	fliebel	hey
10:51	stuartsierra	The only problem is AOT-compilation (dun dun DAAAH).
10:51	chouser	heh
10:51	raek	what happens if the dependencies of a project depends on different clojure versions, btw?
10:51	chouser	seriously. that was perfect.
10:51	stuartsierra	:)
10:52	stuartsierra	clojure-maven-plugin permits you to declare in the POM which namespaces will be AOT-compiled. This will default to none in the parent module, overridden on a per-module basis.
10:52	stuartsierra	HOWEVER
10:52	stuartsierra	As we know, AOT-compilation is indiscriminately transitive.
10:53	stuartsierra	For example, AOT-compiling clojure.contrib.condition.Condition (for gen-class purposes) also AOT-compiles clojure.contrib.seq.
10:53	abedra	stuartsierra: and indiscriminately awesome
10:54	chouser	is that behavior not yet slated to be changed?
10:54	stuartsierra	Those AOT-compiled functions may be binary-incompatible with any Clojure version other than the one they were compiled with.
10:54	stuartsierra	chouser: not yet, despite many requests
10:56	chouser	is there not buy-in on the idea of intransitive compilation, or is it just a issue of correct implementation?
10:56	stuartsierra	the latter, I think
10:57	chouser	cemerick: c'mon, man, write a better patch!
10:57	chouser	:-)
10:58	cemerick	ha
10:58	cemerick	chouser: outside of far more significant refactoring (e.g. eliminating the distinction between eval and compile entirely), I'm not sure how it could be simplified.
10:58	cemerick	But then, rhickey has shown me up before. :-)
10:58	stuartsierra	https://www.assembla.com/spaces/clojure/tickets/322-enhance-aot-compilation-process-to-emit-classfiles-only-for-explicitly-specified-namespaces
10:59	stuartsierra	Stu Halloway has moved this to Release.Next, meaning 1.3.0 probably.
10:59	chouser	perhaps it should be committed to master soon so people can start experiencing the pain, if any.
11:00	stuartsierra	Now, there are very few contrib modules that still require AOT-compilation.
11:00	cemerick	I'd forgotten the specifics of Stu's comment -- sounds like there's no specific issues with the patch, just touched too many things too close to release-time.
11:00	stuartsierra	So my plan would be to release those with clojure.version set to 1.2.0 exactly.
11:01	stuartsierra	cemerick: yes that sounds right
11:01	chouser	could an individual module specifically prevent itself from being AOT compiled?
11:02	chouser	I guess that might bug people building their own apps based on contrib.
11:03	stuartsierra	chouser: I don't think there's any way to do that
11:03	cemerick	There's always banging away at compile-path as desired, before and after the entirety of the ns....
11:03	chouser	cemerick: that's roughly what I was thinking.
11:04	stuartsierra	Yeah, there's even an option in clojure-maven-plugin to do that.
11:04	stuartsierra	But I really don't want to go there.
11:04	cemerick	a lib should never be able to prevent itself from being AOT-compiled.
11:04	cemerick	You never know what people downstream will need to do.
11:04	cemerick	Besides, AOT is orthogonal to code, and belongs in the build config (whatever form that may take).
11:06	stuartsierra	So if I can clean up the deprecations, I will try to release clojure-contrib 1.3.0 later today.
11:06	stuartsierra	From that point, each module can follow its own release / versioning path.
11:07	stuartsierra	We'll just have to figure out how to get the "release" artifacts deployed on build.clojure.org.
11:07	chouser	will there still be whole-contrib releases?
11:07	cemerick	...and chaos will rule the land.. ;-)
11:07	stuartsierra	cemerick: you got that right
11:08	stuartsierra	There will still be versioned releases of org.clojure.contrib:complete, which will have transitive dependencies on all other modules.
11:08	stuartsierra	Using the latest released version of each module.
11:08	cemerick	I presume chouser is talking about an aggregate shrug
11:09	stuartsierra	You can already get an aggregated JAR from the "complete" module.
11:09	stuartsierra	Aggregated ZIP releases are on my TODO list as well.
11:09	cemerick	oh, oh -- I figured that was just a shell to point @ the transitive deps.
11:10	stuartsierra	cemerick: it is, but it has a Maven assembly configuration to produce a contrib uberjar.
11:10	stuartsierra	Although this is not deployed as an artifact on build.clojure.org
11:10	cemerick	Oh how I dislike that term...
11:11	stuartsierra	Nevertheless, in Maven or Leiningen, depending on org.clojure.contrib:complete will give you all of contrib
11:11	stuartsierra	cemerick: me too, but I have fun saying it in a faux-German accent.
11:16	ordnungswidrig	I'm looking for an easy way to "join" map, say {:a 1 :b 2} to "a=1;b=2"
11:17	fliebel	ordnungswidrig: With that specific syntax?
11:17	cemerick	stuartsierra: Every time I read "uber" written by a programmer, I'm going to tweet something using the phrase "hipster-geek", which generally seems to annoy those that use "uber" most often.
11:17	ordnungswidrig	fliebel: , instead of ;
11:17	fliebel	ordnungswidrig: I'll try to cook something up...
11:23	fliebel	,(reduce #(str %1 (name (first %2)) "=" (last %2) ", ") "" {:a 1 :b 2})
11:23	clojurebot	"a=1, b=2, "
11:23	stuartsierra	fliebel: that's less efficient that using a StringBuilder
11:24	fliebel	stuartsierra: Enlighten us :)
11:24	ordnungswidrig	stuartsierra: what would be acomplished how?
11:24	chouser	(symbol (apply str (mapcat #(cons "\n" (next (map {\0 \ \1 \#} (Long/toBinaryString %)))) [185 13235209671M 25939708511M 1654794401M 12429901063M 131081 65539])))
11:25	chouser	oh wait, that's something else
11:25	mrBliss	,(require '[clojure.string :as s])
11:25	clojurebot	nil
11:25	mrBliss	,(s/join ", " (map #(str (first %) "=" (second %)) {:a 1, :b 2}))
11:25	clojurebot	":a=1, :b=2"
11:25	stuartsierra	(let [sb (StringBuilder.)] (doseq [[k v]] (.append sb (str k)) (.append sb "=") (.append sb (str v))) (str sb))
11:26	stuartsierra	Strings make me go all imperative for some reason.
11:26	ordnungswidrig	stuartsierra: where comes the map in?
11:26	stuartsierra	oops
11:26	stuartsierra	(doseq [[k v] the-map] ...)
11:26	stuartsierra	and I bet I missed a paren or six
11:26	chouser	,(apply str (butlast (mapcat (fn [[k v]] [(name k) \= v \,]) {:a 1 :b 2})))
11:26	clojurebot	"a=1,b=2"
11:27	mrBliss	,(s/join "," (map #(str (name (first %)) "=" (second %)) {:a 1, :b 2}))
11:27	clojurebot	"a=1,b=2"
11:27	fliebel	chouser: Thanks, a new function was learnt :)
11:28	ordnungswidrig	thanks all
11:28	ordnungswidrig	I throw in a (-> % first name) to get rid of the :
11:30	chouser	fliebel: probably should be drop-last instead
11:30	ordnungswidrig	What is "Unsupported binding form: ..."
11:30	chouser	in fact, it should be. please pretend I never mentioned butlast
11:31	fliebel	chouser: What's the difference? they both seem to produce the desired result.
11:33	chouser	butlast is eager but returns a seq. odd beast.
11:33	fliebel	chouser: So the only difference is that drop-last is lazy?
11:33	arkh	why doesn't this return anything? (for [x (repeatedly rand)] (prn x))
11:34	chouser	drop-last returns a normal lazy seq, plus can take a numeric arg and has a beautifully clever definition.
11:35	chouser	arkh: 'for' is lazy, so 'prn' won't be called unless you force the sequence.
11:35	chouser	arkh: you could try replacing 'for' with 'doseq', but that'll never end.
11:35	fliebel	,(take 3 (for [x (repeatedly rand)] (prn x)))
11:35	clojurebot	(nil nil nil)
11:36	stuartsierra	,(take 3 (for [x (repeatedly rand)] x)
11:36	clojurebot	EOF while reading
11:36	stuartsierra	,(take 3 (for [x (repeatedly rand)] x))
11:36	clojurebot	(0.7727220105041916 0.9438459028734485 0.38389401142129465)
11:36	arkh	that makes sense - thank you
11:38	fliebel	Would it be appropriate to use a markov chain to make a rock paper scissors game?
11:41	thunk	That's a psychology question :)
11:42	fliebel	thunk…. you're probably right. But it's going to be in Clojure :D cheap excuse
11:43	fliebel	It's going to be fun to make anyway, so I'll just do it. The other option is some more complex patter matcher.
11:45	arkh	it's supposed to be a random process, but if the state that follows is dependent on the current state, you have a 50/50 of what to go with. So there's only three pairs of 50/50 that can come about, right?
11:47	arkh	well ... assuming the state that follows is one that must win or tie. Nvm ... I don't know what I'm talking about. :)
11:47	fliebel	me neither
11:48	fliebel	arkh: the idea is that humans are not proper random number generators, and so are predictable
11:50	fliebel	arkh: So I hope that if I measure the probability of certain actions following on the previous action… for example, if I choose stone last time, there is maybe 45% change I'll choose stone again
11:50	fliebel	I'm about to find out if it works
11:52	arkh	fliebel: given a finite number of choices and sufficient data, do you hope to predict human behavior in other settings, too, or is this just an exercise? :)
11:53	fliebel	arkh: I was just thinking about this game, but the experience might come in handy later on…
11:54	fliebel	arkh: Might be fun to predict other things thoug, but I don't think markov is the golden standard for predicting human.
11:58	grc	Is it possible to get hold of the body of a function from its symbol?
11:59	grc	I've got as far as getting the function object but don't know how it is structured
11:59	chouser	grc: sort of. see the 'source' macro or source-fn
11:59	grc	chouser: thanks I'll go and have a play
12:02	chouser	fn's don't store their source, but vars that point to fns have enough metadata that, if the .clj file is on the classpath, you can go find the source.
12:06	technomancy	fns can store their source
12:06	technomancy	with special sauce
12:06	technomancy	http://github.com/Seajure/serializable-fn
12:07	chouser	that doesn't handle closures, does it?
12:09	stuartsierra	Nothing handles closures.
12:10	stuartsierra	"You wan't closure? You can't handle this closure."
12:10	technomancy	chouser: depends on what you close over
12:10	pheuter	I'm having trouble running the jar file created with leiningen
12:11	technomancy	it's not smart enough to drop it silently if you close over something unseriablizable; it just freaks out
12:11	pheuter	Failed to load Main-Class
12:11	fliebel	What is the Clojure equivalent of a switch statement? Multimethod?
12:11	stuartsierra	fliebel: "case" in 1.23
12:11	stuartsierra	1.2
12:11	technomancy	or rather, something un-pr-str-able
12:12	grc	chouser: What I'm trying to do is ascertain whether or not a function is pure by checking it and its callees for impurity
12:12	fliebel	technomancy: What is un-pr-str-able?
12:12	stuartsierra	grc: I think that's called the Halting Problem
12:12	technomancy	fliebel: Java objects which pr-str is inable to print correctly
12:16	grc	stuartsierra: I'm looking a trying to implement a run time assertion check comparable to JML and want to prevent :pre, :post from calling (potentially) side effect prone functions.
12:16	grc	Whether or not teh function is actually called I can live with
12:16	stuartsierra	:pre/:post should never have side-effects
12:17	stuartsierra	never ever
12:18	grc	agreed, but that's enforced only by good behaviour
12:18	slyrus	there go the debugging printlns in the :pre/:post methods
12:18	_fogus_	should never != cannot
12:18	grc	stuartsierra: Also there's some stuff in JML where side effects are allowed, as long as they're limited to the Runtime Assertion Checking plane
12:19	stuartsierra	_fogus_: true, but if they are, you're screwed anyway
12:19	_fogus_	stuartsierra: not unless you never violate your constraints. ;-)
12:19	_fogus_	or are you referring to a deeper psychological screwed?
12:20	stuartsierra	Screwed psychologically and metaphysically
12:22	_fogus_	you can add ethically to that list also
12:22	arkh	If I call lazy-seq on a some Java that returns a string, will the lazy-seq grow and retain everything over which it's 'iterated'? I need a way to make a collection/sequence that doesn't grow forever.
12:22	chouser	ponders being metaphysically screwed.
12:22	chouser	/me, that is.
12:23	chouser	arkh: no, lazy-seq just creates one step
12:23	chouser	don't see how it'd be useful to call it on a string
12:23	arkh	chouser: oh, cool
12:23	arkh	it returns a different string each time
12:24	arkh	it's some networking stuff I want to hand to seque
12:24	chouser	probably calling seq would be sufficient.
12:24	arkh	I need multiple threads, though, too ;)
12:25	chouser	still don't see what lazy-seq buys you there
12:25	chouser	but it's lunchtime, so I'm off...
12:25	arkh	doh
12:26	stuartsierra	OK, pushed Ben's #93 patches to master.
12:26	arkh	seque requires a "(presumably lazy) seq" and my multiple calls to some java need to become that. I thought lazy-seq (or something else) would be one way to provide that to seque
12:26	_fogus_	even a chouser must eat!
12:26	stuartsierra	This removes namespaces deprecated in 1.2.0
12:26	stuartsierra	We'll see if the Hudson build passes.
12:35	stuartsierra	Woohoo! Pass!
12:44	cemerick	The joys and sorrows of a build jockey. :-D
12:45	raek	arkh: maybe you could do something like this: http://github.com/raek/stream-seq/blob/master/src/se/raek/stream_seq.clj#L30
12:45	raek	arkh: just replace take! with your java call
12:46	raek	only as much of a lazy sequence you keep a reference to will be retained
12:48	stuartsierra	Now I just need to figure out how to deal with releases of individual modules.
12:49	stuartsierra	That is, how to handle the case when module X wants to make a stable release while all other modules are on SNAPSHOT versions.
12:52	stuartsierra	Now pushing patches to inhibit AOT compilation except where necessary.
12:53	cemerick	....and build times everywhere else go up... :-)
12:53	raek	I should really complete the patch and tests for the c.c.json eof bug...
12:55	stuartsierra	raek: I fixed that, by the way, just haven't pushed to master yet
12:55	raek	I have a fix too, just some tests left
12:57	stuartsierra	Damn, build #188 failed because of clojure.contrib.logging
12:58	raek	stuartsierra: do you have it committed anywhere where I can look at it?
12:58	stuartsierra	raek: on Assembla
12:59	raek	oh. right.
13:02	raek	looks good
13:28	joshua-choi	Can defrecord take a doc-string at all?
13:30	spewn	joshua-choi: No. Something about metadata being lost on Java objects.
13:30	joshua-choi	spewn: Unfortunate. Thanks for the answer.
13:36	chouser	you can put doc strings on record instances
13:36	chouser	not sure that that's useful. :-P
13:37	joshua-choi	Well, doc-strings are usually in vars' metadata anyway, right?
13:37	chouser	yeah
13:38	joshua-choi	I guess that defrecord creates a Java class rather than a var...
13:38	chouser	defrecord doesn't create a var, hense the problem
13:38	chouser	right
13:38	joshua-choi	..and that's why.
13:38	joshua-choi	It's still unfortunate.
13:38	chouser	and for some reason Class doesn't implement clojure.lang.IMeta
13:38	joshua-choi	Ha
13:39	_fogus_	(extend-type java.lang Class IMeta ...)
13:39	_fogus_	:p
13:40	technomancy	(extend-type java.util.regex.Pattern IFn) ;; <= if only =\
13:40	chouser	(extend-protocol PMeta Class ...)
13:41	chouser	but there'd still be no storage for the metadata
13:41	arkh	raek: thanks, I'm looking at that now
13:42	jneira	hi people
13:42	_fogus_	(extend Fogus IAwesomeness {:haikeeba (fn [_] ...))
13:42	chouser	Just read http://dreamsongs.com/ObjectsHaveNotFailedNarr.html -- interesting to hear a Guy like Steele defend objects in the face of functional programming.
13:42	jneira	(defprotocol DontWorks (for [me]))
13:42	jneira	:-(
13:43	jneira	i suppose defprotocol in 1.2.0 works for everyone else ...
13:44	jneira	.(+ 1 2 3)
13:44	jneira	jum i have to enter in irc a little bit more
13:46	jneira	, (+ 1 2 3)
13:46	clojurebot	6
13:56	luc4s	Hi. Why do I get NullPointerException when println something and then flush? Like when I try: ((println "any")(flush))
13:57	chouser	try (do (println "any") (flush))
13:57	raek	luc4s: if you want to "do" multiple things as one expression, you have to use "do"
13:57	chouser	luc4s: those outer parens mean Clojure will try to use the return value of (println "any") as a function
13:57	chouser	but (println "any") returns nil, and calling nil as a function is a NullPointerException
13:58	luc4s	oh, I understand. I thought they where like ; and enter hehe
13:58	kumarshantanu	is a CCW user around? need to pointer on namespaces with dash character
13:58	luc4s	:chouser :raek Thanks!
13:59	raek	jneira: what error do you get?
13:59	kumarshantanu	s/to/some/
13:59	sexpbot	<kumarshantanu> is a CCW user around? need some pointer on namespaces with dash character
13:59	raek	in clojure in general, dashes in namespace names corresponds to hyphens in file names
14:00	kumarshantanu	raek: did you mean underscore in file names?
14:00	raek	eh. yes.
14:01	jneira	jum my silly fault, better i dont say nothing :-/
14:02	jneira	thanks raek
14:02	raek	kumarshantanu: but since you knew that, I guess that wasn't the problem anyway ;-)
14:02	kumarshantanu	raek: thanks, it's working in CCW now
14:03	kumarshantanu	raek: is it idiomatic in Clojure to create namespaces with a dash? I have noticed some libs that use
14:04	raek	dashes to separate words is the ideomatic way (except for generated class names, protocols, records and types)
14:05	raek	it is what clojure.core uses, anyway...
14:06	arkh	I finally half understand lazy-seq
14:07	arkh	someday I'll bother to learn macro syntax and then I'll understand the other half
14:11	mcav	I had a stray (set! warn-on-reflection true) in a source file, and it interfered with running the app on Jetty; is it true that warn-on-reflection should always be set through the REPL and not in source files?
14:13	fliebel	What is the best way to increment one value in a nested map? Example {:increment {:this 1}} The best thing I can come up with is a lot of assoc.
14:13	mcav	fliebel: assoc-in?
14:14	dnolen_	,(update-in {:foo {:bar 0}} [:foo :bar] inc)
14:14	clojurebot	{:foo {:bar 1}}
14:14	fliebel	dnolen: That looks more like it :)
14:15	chouser	,(update-in nil [:foo :bar] nil?)
14:15	clojurebot	{:foo {:bar true}}
14:16	technomancy	mcav: you can set :warn-on-reflection true in project.clj so it will just work at dev-time if you're using leiningen
14:17	mcav	yeah, i'm using lein and turned that on afterward
14:18	raek	arkh: have you tried this: http://gist.github.com/480608
14:18	raek	it can be quite useful when learning when lazy sequences are realized
14:19	raek	arkh: I'm awesome? thank!
14:20	ssideris	raek: again, very good example
14:20	arkh	raek: crazy - that's neat
14:27	_fogus_	Is there a better way to test private vars than this kind of nonsense: (def nsm (ns-map (find-ns 'me.fogus.unifycle))) ,,, (def garner-unifiers (nsm 'garner-unifiers)) ,,, (deftest ... (is (= {} (garner-unifiers ...))))
14:28	chouser	(is (= {} (#'garner-unifiers ...))) should work
14:28	chouser	@#'foo for non-function values
14:28	mrBliss	How do I hint something of the following type:
14:29	mrBliss	,(class (.getParameterTypes (first (.getDeclaredConstructors Integer))))
14:29	clojurebot	[Ljava.lang.Class;
14:29	mrBliss	adding ^"[Ljava.lang.Class" in front of it didn't work
14:29	chouser	mrBliss: keep the ;
14:29	mrBliss	gives a ClassNotFoundException [Ljava/lang/Class..
14:30	mrBliss	I'll tryit
14:31	mrBliss	I think it works (not so clear because of other warnings in the same method)
14:31	mrBliss	thanks
14:32	raek	the "L" and "[...;" notation of the JVM is not very aestethic...
14:33	raek	*"L...;" and "["
14:33	chouser	no
14:35	_fogus_	chouser: no go
14:36	_fogus_	oh wait, it needs ns qualification
14:36	chouser	sorry, try fully-qualifiying the ... yeah
14:36	chouser	cgrand's answer was right the first time: http://clojure-log.n01se.net/date/2009-02-06.html#10:49
14:36	_fogus_	that's the ticket. thanks
14:37	fliebel	yay, my first version of markov rock paper scissors works! It's not very advanced though.
14:37	_fogus_	how the heck did you find that? you have some incredible search-fu
14:38	chouser	_fogus_: I grepped for @#'
14:38	chouser	I knew the answer -- was just looking for the date/time
14:46	mrBliss	Is it possible that type hints are lost in with-open?
14:51	chouser	,(binding [print-meta true] (prn (macroexpand '(with-open [f1 ^File f2]))))
14:51	clojurebot	(let* [f1 ^File f2] (try (clojure.core/with-open []) (finally (. f1 clojure.core/close))))
14:51	chouser	looks ok there
15:00	mrBliss	thanks chouser
15:01	mrBliss	found my problem, I had a File in with-open, but File hasn't got a .close method
15:01	chouser	ah
15:01	chouser	and my use of ^File didn't exactly help in that regard. :-P sorry
15:17	@rhickey	clojure-conj registration is now open! http://groups.google.com/group/clojure/browse_frm/thread/210ac9303d7ccec1
15:17	chouser	woo!
15:19	wwmorgan	damn. My sister's wedding is that weekend
15:20	wwmorgan	She's going to be so disappointed ;-)
15:21	chouser	heh
15:21	danlarkin	I love fogus' picture
15:22	cemerick	Very exciting.
15:22	cemerick	Great price point, hope there's a big venue :-)
15:23	mrBliss	are the talks gonna be filmed and put online?
15:26	lancepantz	they should be
15:28	raek	is rhickey's talk on pods from emerging langs available somewhere, btw?
15:29	cemerick	rhickey: might want to get someone to redirect http://first.clojure-conj.org/ to the main site
15:29	wooby	cemerick: working on it
15:42	mabes	,(str #"foo\.bar")
15:42	clojurebot	"foo\\.bar"
15:42	mabes	Is there a way I can get "foo\.bar"? So, the non-escaped version?
15:43	chouser	that is unescaped. the string only has one backslash, it's just that when printed it needs to show you two.
15:45	mabes	chouser: my use case isn't for printing but for sending it back in an API.. i.e. this field failed to match this regexp
15:46	mabes	chouser: and when I send back the str version the response has the two slashes in it.. what am I missing?
15:46	chouser	I'm not sure.
15:46	chouser	,(println #"foo\.bar")
15:46	clojurebot	#"foo\.bar"
15:46	chouser	,(println (.pattern #"foo\.bar"))
15:46	clojurebot	foo\.bar
15:47	mabes	,(prn-str #"foo\.bar")
15:47	clojurebot	"#\"foo\\.bar\"\n"
15:47	chouser	,(count (str #"foo\.bar"))
15:47	clojurebot	8
15:50	pdk	,(* 6 1024)
15:50	clojurebot	6144
15:50	pdk	show of hands
15:50	pdk	how much swap space would you give to a system youre setting up with 4gb ram
15:51	pdk	,(* 8 1024)
15:51	clojurebot	8192
15:52	pdk	,(* 30 1024)
15:52	clojurebot	30720
15:52	pdk	,(* 35 1024)
15:52	clojurebot	35840
15:53	ssideris	i know it's not a plausible situation, but how would you write this more elegantly?
15:53	ssideris	,(update-in {} [:a :b :c] #(do '(%) 4))
15:53	clojurebot	{:a {:b {:c 4}}}
15:55	wwmorgan	,(assoc-in {} [:a :b :c] 4) ; ssideris: like this?
15:55	clojurebot	{:a {:b {:c 4}}}
15:56	ssideris	haha ok, I think I took the fact that you needed a function at face value
15:56	ssideris	thanks
15:57	Chousuke	ssideris: out of curiosity, why did you put the '(%) in the function?
15:57	Chousuke	just #(do 4) would've been enough.
15:57	wwmorgan	Chousuke: My guess it to make it unary?
15:58	Chousuke	ah. right.
15:58	Chousuke	of course.
15:58	wwmorgan	pretty creative, actually
15:58	ssideris	Chousuke: yeah it is called with one argument
15:58	Chousuke	(constantly 4), then :)
15:58	ssideris	wwmorgan: the awkward creativity of a newbie
15:59	Chousuke	In cases like that I'd just use fn directly and not the shortcut form
15:59	stuartsierra	Clojure-Conj!
15:59	Chousuke	so you can write (fn [_] ...)
15:59	ssideris	is _ the convention for unused arguments?
15:59	Chousuke	yeah
16:00	ssideris	ok
16:00	Chousuke	though you can name the arguments too if you want to.
16:00	stuartsierra	Clojure-Conj! Clojure-Conj!
16:00	ssideris	clojure-conj would be nice, but it's a bit too far for me :-)
16:00	Chousuke	_ is just often used if neither the name or the argument matter.
16:01	stuartsierra	http://clojure-conj.org/
16:01	kumarshantanu	Chousuke: In my case _ led to non-evaluation of an expression
16:02	Chousuke	kumarshantanu: hm? how did that happen?
16:02	kumarshantanu	(defonce _ (nomnomnom)) ;; doesn't evaluate
16:03	Chousuke	kumarshantanu: Hm, I see no reason why that shouldn't evaluate but it's not a good idea anyway
16:04	wwmorgan	kumarshantanu: I think that's the defonce, and not the _. I got similar behavior until I remembered to ns-map '_ from ns
16:04	kumarshantanu	Chousuke: I needed a defonce to do interactive web development using Eclipse/CCW and Ring/Compojure
16:04	Chousuke	_ is a valid symbol in clojure so technically you can define a var called _ if you want to.
16:04	kumarshantanu	Chousuke: defonce was supposed to start Jetty inside a future
16:05	Chousuke	but that's not a good idea because _ is used as the "not-used" name by pretty much everything :P
16:05	kumarshantanu	Chousuke: strangely, Jetty doesn't start when I put a _, but does when I put any other name
16:06	kumarshantanu	Chousuke: I was trying _ because I didn't need to refer the value of future
16:07	Chousuke	I see.
16:07	Chousuke	I have no idea why jetty would break because of something like that though.
16:08	kumarshantanu	Chousuke: maybe it's not jetty....perhaps CCW or Clojure's reload-feature, I am not sure
16:08	kumarshantanu	s/reload/load-reload/
16:08	sexpbot	<kumarshantanu> Chousuke: maybe it's not jetty....perhaps CCW or Clojure's load-reload-feature, I am not sure
16:26	arohner	is there a java compiler library somewhere that could be used from a clojure repl?
16:26	arohner	I really want slime to be able to eval Java classes
16:27	kumarshantanu	arohner: ASM or CGLIB?
16:27	arohner	kumarshantanu: I don't understand
16:28	stuartsierra	arohner: there are Java "interpreters"
16:28	kumarshantanu	arohner: ASM -- http://asm.ow2.org/ and CGLIB -- http://cglib.sourceforge.net/
16:28	arohner	kumarshantanu: thanks
16:28	arohner	so javac doesn't have a Java API?
16:29	arohner	ooh, http://download.oracle.com/javase/6/docs/api/javax/tools/JavaCompiler.html
16:29	kumarshantanu	arohner: I think you can use the Groovy's eval which can accept Java code mostly as it is
16:40	lancepantz	arohner: there is an ant task for javac, which does have a java api
16:58	fliebel	Does anyone want to try and beat my Clojure Markov Rock Paper Scissors bot?
16:59	fliebel	http://gist.github.com/564552
17:04	dysinger	fliebel: my draw is (chuck-norris) your bot just lost
17:05	fliebel	dysinger: What do you mean by the whole part before the last paren?
17:07	fliebel	Psygology is complicated...
17:09	fliebel	I'm going to switch to a better system tomorrow yawn
17:11	fliebel	dysinger: Do you have a strategy or pattern you use? Do you base your next step on your own previous actions, or on the opponents action? I guess it's both...
17:32	replaca	Is there a way to make a java List<String> from clojure? (So I can pass it to ProcessBuilder.)
17:33	kumarshantanu	replaca: pass this -- '("string1" "string2" "string3")
17:34	replaca	directly to ProcessBuilder?
17:34	kumarshantanu	replaca: java's generics have type erasure, so at runtime it's just List, not List<String>
17:34	kumarshantanu	replaca: yes
17:34	replaca	ahh, thx, I'll give it a try
17:37	raek	,(map #(instance? java.util.List %) [(list 1 2 3) [1 2 3]])
17:37	clojurebot	(true true)
17:41	replaca	kumarshantanu: works like a charm! thanks
17:42	kumarshantanu	replaca: clojure is a better language to write Java code too :-)
17:44	replaca	kumarshantanu: for me it's the best language to write any code. Today I'm using it to write a development dashboard (showing perforce and bugzilla activity is a convenient web interface)
17:45	replaca	*is => in
17:46	kumarshantanu	replaca: cool, what libraries are you using? just curious
18:10	mvid	im trying to set up the compojure hello world, but when i run lein repl src/project/core.clj i get a "wrong number of arguments to repl task" error
18:11	lancepantz	mvid: just lein repl
18:11	mvid	then what?
18:11	mvid	that doesn't run jetty
18:12	raek	mvid: I think you need to update leiningen
18:12	arbscht	require your ns
18:12	raek	the script argument was added pretty recently
18:12	raek	lein repl
18:12	raek	(require 'project.core)
18:13	mvid	im using lein v 1.3
18:14	mvid	is that too old?
18:14	mvid	raek that worked
18:15	arbscht	1.3 is fine. I don't think lein supports that argument anymore, if it ever did
18:15	mvid	cool
18:15	mvid	thanks
18:15	technomancy	it never supported arguments on purpose; it just accepted them because it used to be based on clojure.main.
18:16	technomancy	but if you set an ns as your :main in project.clj it will requrie and in-ns it
18:20	Raynes	chouser: In a little while, I'll post to my group thread with some profiler data before and after a couple of :reloads. I'm considering checking out yourkit. I may just suck at profiling, but jvisualvm's data is kind of greek to me. :p
18:23	chouser	yourkit does a somewhat better job of making the data make sense, but it's still a bit befuddling to me
18:28	replaca	kumarshantanu: sorry, I wandered off
18:29	kumarshantanu	replaca: np
18:29	replaca	kumarshantanu: for bugzilla I'm using the apache xmlrpc lib and for perforce I'm just grinding on shell output
18:30	kumarshantanu	replaca: what's for the web handling? ring/compojure/enlive? or something else?
18:30	replaca	on the other side, I was thinking I was going to use compojure (cause I already have code), but I may look around for something else and for formatting, I love enlive
18:30	kumarshantanu	okay
18:31	replaca	Clojure really shines in this "gluing a whole bunch of stuff together" area
18:31	technomancy	you could use coldfusion
18:31	technomancy	it's an option these days
18:32	replaca	technomancy: are you being sarcastic? That's not allowed on this list
18:32	technomancy	sorry, I forgot my unicode irony mark
18:32	replaca	:)
18:32	technomancy	⸮
18:33	replaca	Yeah, I didn't understand if his objection to enlive was just in not understanding its mechanism or because he really preferred the jsp/erb way of doing things
18:35	mvid	does anyone have a favorite compojure authentication library?
18:37	tomoj	is there more than one choice?
18:37	mvid	is there any choice?
18:41	tomoj	could've sworn I saw something on planet clojure recently
18:41	lancepantz	i think it was the guy that does sandbar talking about it
18:41	lancepantz	brenton somebody
18:42	tomoj	aha http://github.com/brentonashworth/sandbar
18:42	tomoj	yeah
18:42	tomoj	mvid: don't take that as a recommendation
18:43	lancepantz	http://formpluslogic.blogspot.com/2010/08/securing-clojure-web-applications-with.html
18:46	tomoj	hurray fnparse activity
20:08	DanielGlauser	Let's say I'd like to mutate a map within the confines of a ref, I'd like to change a value for a couple of the keys. Would I create a new map with the changed values or is there a way to set a value in the map?
20:12	kumarshantanu	hi, can anybody let me know how can I (1) extract a value from request map AND (2) get route variable...with a route in Compojure?
20:12	Licenser	DanielGlauser: you can't change values in the map, they are imutable that is the whole point
20:13	kumarshantanu	(GET "/foo/:id" {params :params} [id] (whatever...))
20:14	Licenser	kumarshantanu: sorry I don't know compojure
20:15	DanielGlauser	Licenser: So if I had a map with 20,000 values in it, there's no way to mutate it even if I'm within the confines of a transaction (doseq ...)
20:16	technomancy	DanielGlauser: you want to call alter with assoc
20:17	Licenser	yes so it won't mutate the map in the end it's still a new map
20:17	Licenser	(unless it are transients but I think that goes too far)
20:18	DanielGlauser	technomancy: Thanks! I've spent so much time studying the immutable stuff when it came time to mutate something I didn't know how to do it.
20:18	technomancy	well... you're still not mutating a data structure
20:18	DanielGlauser	Licenser: I'm okay with it being a new map, I just didn't want to have to iterate through the entire map to construct a new one
20:19	Licenser	ah okay then I missunderstood you sorry :)
20:20	DanielGlauser	technomancy: Yeah, I get that part, thanks! Wrote code to iterate through the map and figured there was a better way. Thanks guys.
20:21	Licenser	wow I really wasn't helpful o.O sorry DanielGlauser :)
20:26	jneira	i think if i continue twetting translations from raw to monadic computations my popularity is going to go down...
21:44	zztr	,(deftype Mytype [a b] Object (toString [this] (str a b)))
21:44	clojurebot	sandbox.Mytype
21:44	zztr	,(def mt (Mytype :y :z))
21:44	clojurebot	DENIED
21:45	zztr	,(Mytype :y :z)
21:45	clojurebot	java.lang.Exception: Expecting var, but Mytype is mapped to class sandbox.Mytype
21:45	zztr	I can't find an example of how to do this correctly
21:49	zztr	,(Mytype. :y :z)
21:49	clojurebot	#<Mytype :y:z>
21:50	zztr	sigh
22:29	dnolen	zztr: http://github.com/ztellman/cantor/blob/master/src/cantor/vector.clj#L358
23:02	qbg	Finally found a use for promise/deliver
23:02	qbg	I use it once in my parallel mapreduce function