#clojure – 2010-08-12

2010-08-12

02:18	vIkSiT	hi all
02:18	vIkSiT	using 1.2.0-beta1 - how do you recommend resolving this error: error: java.lang.IllegalStateException: spit already refers to: #'clojure.contrib.duck-streams/spit in namespace
02:18	vIkSiT	(I currently have a :use [clojure.contrib.duck-streams :only [slurp spit]])
02:19	vIkSiT	but I cant figure out what the overriding package is
02:21	ecyrb	in 1.2.0-RC1 at least (and probably 1.2.0-beta1), spit and slurp are in clojure.core
02:21	ecyrb	(so you don't need to "use" them)
02:21	zmila	(:refer-clojure :exclude [spit]) inside (ns
02:24	vIkSiT	aah
02:24	vIkSiT	zmila, ecyrb - thanks so much :)
02:25	vIkSiT	i had totally forgotten about :refer-clojure
02:26	ecyrb	sorry - didn't realize duck-streams spit and slurp were different
02:34	zmila	:) i never know it, just see in some example
02:36	LauJensen	Good morning all
02:37	raek	,(doc seq1)
02:37	clojurebot	No entiendo
03:58	cobol_expert	is there an opposite to 'read-string'? It's probably obvious, but eluding me at the moment, something to convert a clojure data structure to its string representation
03:59	arbscht	,(str [:foo])
03:59	clojurebot	"[:foo]"
04:00	cobol_expert	ha, that was easy.. I thought that was just used for concatenating strings :)
04:00	cobol_expert	thx
04:01	zmila	use print-dup
04:01	zmila	answer of MM: http://stackoverflow.com/questions/3301439/clojure-data-structure-serialization
04:08	cobol_expert	okay, researching this now...
04:08	cobol_expert	one thing I'd like to do is deref any refs in the structure
04:08	cobol_expert	,(str {:hi (ref "hi")})
04:08	clojurebot	"{:hi #<Ref@aa7acb: \"hi\">}"
04:09	cobol_expert	i probably need to walk the tree and do that myself first...
04:11	hoeck	cobol_expert: maybe the functions in clojure.walk will help you with this
04:16	cobol_expert	yeah, i've been playing with that package.. though now I'm questioning why I'm using refs if I'm going to persist to disk anyway
04:19	hoeck	cobol_expert: sorry, couldn't resist: (clojure.walk/postwalk (fn this [x] (if (instance? clojure.lang.IDeref x) (clojure.walk/postwalk this (deref x)) x)) {:a (ref {:a :b})})
04:25	raek	cobol_expert: pr-str is good when you want a string that can be read from
04:26	raek	,[(str [123 "foo" :bar (lazy-seq [1 2 3])]) (pr-str [123 "foo" :bar (lazy-seq [1 2 3])]))
04:26	clojurebot	Unmatched delimiter: )
04:27	raek	,[(str [123 "foo" :bar (lazy-seq [1 2 3])]) (pr-str [123 "foo" :bar (lazy-seq [1 2 3])])]
04:27	clojurebot	["[123 \"foo\" :bar (1 2 3)]" "[123 \"foo\" :bar (1 2 3)]"]
04:27	raek	,(str (lazy-seq [1 2 3]))
04:27	clojurebot	"clojure.lang.LazySeq@7861"
04:27	raek	,(pr-str (lazy-seq [1 2 3]))
04:27	clojurebot	"(1 2 3)"
04:28	raek	there's a bunch of variations of that fn, look for everything that starts with "pr" in the api
05:25	LauJensen	Anybody familiar with a deployment tool which allows for multiple projects to run on a single JVM instance?
05:43	bsteuber	how can I generate static fields/constants with gen-class? like MyColors/BLACK
06:21	cschreiner	hello, why can't I do this? (doseq [e '(for list)] (doc (symbol e)))
06:23	cschreiner	what would be the correct way to process the above?
06:27	hoeck	cschreiner: because doc is a macro, not a function
06:28	cschreiner	hoeck: I know. But how can I make doc eat my e?
06:28	clojurebot	deft is http://gist.github.com/128259
06:28	hoeck	cschreiner: use print-doc instead
06:29	hoeck	,(doseq [e '(for list)] (print-doc (resolve e)))
06:29	clojurebot	java.lang.RuntimeException: java.lang.RuntimeException: java.lang.IllegalArgumentException: Wrong number of args (3) passed to: core$for
06:30	cschreiner	hoeck: but, for the sake of this example, is it possible to use doc?
06:31	LauJensen	cschreiner: Not that I know of
06:31	hoeck	no, because the doc macro expands at compiletime to: (doseq [e ...] (print-doc (var (symbol e)))
06:31	cschreiner	ok, important for me to know this.
06:32	LauJensen	,(let [e 'for] (prn (macroexpand-1 '(doc e))))
06:32	clojurebot	(clojure.core/let [m__1855__auto__ (clojure.core/meta (clojure.core/resolve (quote e))) al__1856__auto__ (:arglists m__1855__auto__) docstring__1857__auto__ (:doc m__1855__auto__)] (if m__1855__auto__ (.replaceAll (clojure.core/str al__1856__auto__ "; " docstring__1857__auto__) "\\s+" " ") (clojure.core/-> hiredman.clojurebot.code-lookup/contrib :vars ((clojure.core/partial clojure.core/filter (clojure.core/fn [a__1858__au
06:32	LauJensen	So, it doesnt get any more clear than that...
06:34	hoeck	cschreiner: the only thing you can do is to write a macro which expands to multiple doc calls
06:34	hoeck	like (defmacro docs [& syms] `(do ~@(for [e syms] `(doc ~e))))
06:35	cschreiner	hoeck: Right, tried that. Thanks
06:35	old_sound_	hi
06:36	LauJensen	Hi old_sound_
06:36	hoeck	old_sound_: hi
06:37	old_sound_	simple question, any of you guys know of an implementation of a memcache like server in clojure. We are looking at exposing some services using a text like protocol similar to redis or memcached
06:38	old_sound_	so It will be nice if there's a tcp project already, where I can plug al the protocol dispatching to my functions. or some tips where I can read more about that
07:40	edbond	old_sound_: take a look at redis-clojure: http://github.com/ragnard/redis-clojure
07:41	edbond	old_sound_: and http://github.com/shughes/clojure-memcached
08:00	old_sound_	edbond: redis clojure is just a library to access redis no?
08:01	old_sound_	edbond: I want to implement the server, not the client
09:39	limux1972	hi, raek, http://tiny.cc/3cmrx is good
10:07	raek	limux1972: does the problem go away if you add that?
10:07	limux1972	yes
10:10	limux1972	i made two test, one with wrap!, another no use
10:11	raek	nice to have that pinpointed...
10:11	limux1972	and look their source individually
10:12	limux1972	their meta line is exactly same
10:14	raek	and those give different results in the browser?
10:14	limux1972	even include the case sensitive of each word
10:14	limux1972	yes
10:16	limux1972	one with ???, another with 你好
10:17	limux1972	how to paste them?
10:18	raek	put it in http://gist.github.com/ and post the URL you get here
10:21	limux1972	http://gist.github.com/521037
10:26	cemerick	Does RC3 fix #422 or no?
10:26	limux1972	if i use wrap! with iso8859-1, the ??? is come
10:26	raek	limux1972: which browser are you using? could you test a thing in Firefox?
10:27	raek	limux1972: you should not use iso8859-1, since the string is by default encoded in UTF-8 by Ring
10:27	raek	also, ISO 8859-1 cannot store chinese characters at all
10:28	limux1972	the browser of chrome and firefox have same result
10:29	limux1972	i thank it's compojure who caused it
10:30	raek	in firefox, click on Tools -> Page Info
10:30	raek	in the table, there should be a row with "content-type" on the left and "text/html <something>" on the right
10:31	raek	could you try what <somethings> is when 1) wrap! is not used 2) wrap! is used with UTF-8
10:32	limux1972	it's very clearly the encoding is iso-8859-1 with no use wrap!
10:33	raek	ok
10:33	raek	anyway
10:33	limux1972	compojure use iso8859 as it's default encoding
10:33	raek	you should always have a :content-type key in your response
10:33	raek	it shouldn't
10:33	limux1972	even the lastest 0.4.1
10:33	raek	well, hrm
10:35	raek	when you do a response, do something like {:headers {"Content-Type" "text/html; charset=UTF-8"}, :body <html goes here>, :code 200}
10:35	raek	the content type should always be specified in a way or another
10:35	raek	you can use middleware for that
10:35	limux1972	but what i see is one is iso8859 and utf8 another with utf8 and utf8
10:36	apgwoz	i don't see any place where compojure is changing the encoding or setting a charset in the Content-Type header...
10:36	raek	the "text/html; charset=iso8859-1" content type is added because you didn't choose a content type yourself
10:36	BrianForester	,(try (prn 1) (finally (prn 2) (throw (Exception.))))
10:36	clojurebot	BrianForester: I don't understand.
10:37	raek	probably this is done by the servlet container or something
10:37	apgwoz	raek: yeah, it would seem that way. or jetty defaults it to that or something
10:37	apgwoz	which.. would be the servelet container as you said
10:37	raek	the problem is that if the encoding is specified in the content-type, then that overrides the meta tags and everything
10:38	raek	so, solution: always provide the content type yourself
10:38	raek	text/html should be sufficient
10:38	BrianForester	cemerick: I just tested this on RC3, doesn't look like 422 was fixed this release.
10:38	limux1972	and only difference between that two tests is one with wrap and another no use it, all of them take the meta of charset "utf8"
10:38	cemerick	BrianForester: the commit referenced that ticket, so I was unclear.
10:39	raek	limux1972: the browser doesn't care about the meta if it sees a "charset=..." in the content-type
10:39	BrianForester	cemerick: same here.
10:39	apgwoz	raek: but compojure already supplies the content-type if you don't set it in the response.
10:39	raek	does it?
10:39	raek	hrm
10:39	apgwoz	according to the source
10:39	raek	to what?
10:39	apgwoz	compojure
10:40	apgwoz	http://github.com/weavejester/compojure/blob/0.4.1/src/compojure/response.clj
10:40	raek	sigh
10:40	raek	then jetty adds a coding attribute
10:40	apgwoz	unless i'm misunderstanding how this is working, but i don't think that's the case
10:40	raek	that's bad...
10:40	limux1972	apgwoz, i use emacs convert the source to utf8,
10:41	limux1972	but it no use
10:41	raek	limux1972: could you give me the link to the tutorial?
10:41	apgwoz	limux1972: what we're saying is that if you don't explicitly set the content-type with a charset, we think jetty will set the charset to ISO-whatever
10:42	apgwoz	which is why you'd be seeing an issue
10:43	raek	limux1972: you can work around this by using the wrap! thing, or add :headers {"Content-Type" "text/html; charset=UTF-8"} to the response map
10:43	BrianForester	cemerick: I'm pretty sure that someone has already supplied a patch, so you could apply it by hand if needed.
10:43	raek	jetty: grrrr
10:44	apgwoz	so, you're handler for compojure should be returning {:status 200 :headers {"Content-Type" "text/html; charset=utf-8"} :body <insert your html here>}
10:44	apgwoz	which is quite inconvenient mind you.
10:45	raek	oh, :status was the correct keyword... disregard my previous example
10:45	limux1972	as you say, raek, just a moment, i remove all the metas and reserve the wrap, how about it?
10:45	raek	limux1972: the meta should be there
10:46	raek	always
10:46	limux1972	i know
10:46	limux1972	i just want to try
10:46	raek	ok, go ahead :)
10:46	limux1972	yeah
10:47	raek	then the browser will probably guess the enconding (if neither meta nor the charset content-type attribute is there)
10:47	limux1972	there is no those annoying ???
10:47	raek	enconding in html is a mess...
10:47	raek	limux1972: probably since the browser guessed the right encoding
10:48	limux1972	yeah, firefox tell us the right encoding utf, but nothing about page info
10:50	limux1972	anthow word, compojure didn't use the meta's charset, it's for browser
10:52	raek	both are for the browser
10:52	raek	compojurer does not care about any of them
10:53	limux1972	browser use which encoding meta tell it to render the html, even since the really encoding is not
10:55	limux1972	if compojure does care it as you say, i have to not only provide meta
10:56	edbond	funny, but enlive doesnt works with utf-8 too
10:56	limux1972	and must provide encoding info somewhere
10:57	limux1972	which compojure can use, where
10:57	limux1972	where?
10:57	clojurebot	where is your source code
10:59	limux1972	wrap! is a nice solution, what is the best?
11:00	raek	having a Contet-Type in the header, which can be done either manually or with middleware
11:01	raek	hrm, yes tagsoup (which enlive uses) does not do encoding detection...
11:02	cemerick	~max
11:02	clojurebot	maxine is http://research.sun.com/projects/maxine/
11:02	cemerick	heh, ok
11:02	raek	someone should take mozilla's encoding detection code and integrate it into tagsoup
11:02	cemerick	hiredman: clojurebot's brain is still out of commission?
11:03	limux1972	http://gist.github.com/521100
11:04	raek	"If you need an autodetector of character sets, consider trying to adapt the Mozilla one; if you succeed, let me know."
11:04	raek	I take that as a challenge, Cowan!
11:05	limux1972	my core.clj
11:09	limux1972	http://gist.github.com/521114, the mostly original core.clj
11:10	limux1972	all work well with wrap
11:11	raek	that looks perfectly fine
11:11	raek	I recommend using wrap
11:11	limux1972	badly without wrap
11:12	limux1972	yes, wrap is a nice way
11:12	limux1972	i wonder the nicer
11:14	limux1972	middleware is a good idea, but this issue should not use middleware, personal view
11:16	edbond	no need for charset detector, utf-8 as a default is good start
11:26	limux1972	i add a prn in wrap! to see the response at begin and end, but the console has noting to display
11:29	BrianForester	cemerick: I was wrong, RC3 does fix #422. I had an old copy of the clojure jar in my classpath.
11:34	edbond	how to make lein swank to run with utf-8 encoding?
11:36	limux1972	raek, I have seen the response, a map, the ring and rack's style, it's :headers is {"Content-Type" "text/html"}
11:36	limux1972	no charset
12:02	pdk	(doc ->)
12:02	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."
12:02	pdk	(doc get-in)
12:02	clojurebot	"([m ks] [m ks not-found]); Returns the value in a nested associative structure, where ks is a sequence of ke(ys. Returns nil if the key is not present, or the not-found value if supplied."
12:03	pdk	,(get-in {1 {2 3} 4 {5 6}} '(1 2))
12:03	clojurebot	3
12:03	pdk	,(get-in {1 {2 3} 4 {5 6}} '(1 3))
12:03	clojurebot	nil
12:03	pdk	(doc interpose)
12:03	clojurebot	"([sep coll]); Returns a lazy seq of the elements of coll separated by sep"
12:03	maxpn	,(a b)
12:03	clojurebot	java.lang.Exception: Unable to resolve symbol: a in this context
12:04	maxpn	,('a 'b)
12:04	clojurebot	nil
12:04	maxpn	, (1 2 3)
12:04	clojurebot	java.lang.ClassCastException: java.lang.Integer cannot be cast to clojure.lang.IFn
12:04	pdk	if you need the literal list use '(a b)
12:04	pdk	,'(a b)
12:04	clojurebot	(a b)
12:04	pdk	or quote, list etc
12:04	maxpn	, (quote 1 2 3)
12:04	clojurebot	1
12:05	maxpn	, '(1 2)
12:05	clojurebot	(1 2)
12:06	pdk	(doc quote)
12:06	clojurebot	excusez-moi
12:06	pdk	'x is shorthand for (quote x)
12:06	pdk	,(quote (1 2 3))
12:06	clojurebot	(1 2 3)
12:06	pdk	theres what you wanted
12:08	limux1972	raek, bye
12:09	pdk	,(list 1 2 3)
12:09	clojurebot	(1 2 3)
12:10	pdk	cf. '(1 2 3)
12:37	edbond	any links for java/clojure utf-8 reading?
12:37	edbond	clj-env-dir doesn't shows utf-8 chars, cake repl shows.
12:52	raek	edbond: clojure io with UTF-8 is pretty simple
12:53	raek	but note that JLine (used by lein repl) does not have support for UTF-8
12:53	raek	swank does, but you have to configure it to use it
12:53	raek	lein swank localhost 4005 ':encoding' '"UTF-8"'
12:54	raek	then you have to add a setting in your .emacs
12:55	raek	(custom-set-variables '(slime-net-coding-system (quote utf-8-unix)))
12:55	raek	then you have UTF-8 in slime+swank!
12:55	raek	as for io (files, sockets, etc):
12:55	raek	check out http://richhickey.github.com/clojure/clojure.java.io-api.html
12:57	raek	UTF-8 is the default encoding for IO in clojure
12:57	raek	for example, open a BufferedReader with:
12:57	raek	(require '[clojure.java.io :as io])
12:58	raek	(io/reader "filename")
12:58	raek	that will read UTF-8 characters from the file
12:58	raek	(io/input-stream "filename") ; will read bytes
12:59	raek	(io/reader "filename" :encoding "ISO-5591-1") ; other encodings can be specified too (default so UTF-8)
12:59	raek	s/5591/8859/
13:01	raek	also, if you want to display and write UTF-8 encoded characters through the terminal, the terminal must of course be correctly set up
13:08	raek	you can then use the usual java.io.Reader methods, such as .readLine
13:09	bmh	I'm coming to Clojure from Haskell and was wondering what the clojure equivalent of the following would look like: data Tree a = Branch (Tree a) (Tree a) \| Leaf a
13:09	bmh	sure I could just make each case a structmap, but it seems like a clunky approach.
13:10	raek	does that make a new type? I have never programmed haskell...
13:11	bmh	raek: Yes. The snippet creates a type 'Tree' that is parameterized by alpha.
13:11	raek	interesting...
13:12	raek	well, clojure is not much about types
13:12	raek	I guess you would just put data in 2-vectors
13:12	bmh	raek: I want to avoid unstructured programming.
13:13	raek	you could perhaps use defrecord if you need them to have their own type
13:13	dnolen	bmh: also there's an ADT library in contrib
13:14	bmh	dnolen: I'll check it out.
13:14	raek	bmh: clojure does not provide the formalness that haskell does
13:14	raek	at least not in the way of a type system
13:15	bmh	raek: Sure, it's closer to Scheme than Haskell or ML
13:16	dnolen	bmh: http://www.mail-archive.com/clojure@googlegroups.com/msg09441.html
13:16	raek	I'm afraid I can't give you a better answer to your "what is the clojure equivalent" question than that there is not exact way of doing it the way haskell does it
13:16	bmh	dnolen: Heh, I just found that page on GOOG
13:17	raek	hrm, repace "no exact way" with "no idemoatic way"
13:17	bmh	Is equality testing still by identity rather than value?
13:17	raek	identity for ref/atom/agent/var, value for data structures and scalars
13:18	bmh	raek: I meant with regards to the ADT lib. The author mentions a caveat that equality is by identity
13:18	raek	,(= (hash-set 1 2 3) (sorted-set 1 2 3))
13:18	clojurebot	true
13:18	raek	oh
13:18	dnolen	bmh: you should read the whole thread
13:18	raek	sorry
13:18	bmh	dnolen: will do
13:21	metagov	Does clojure.contrib have a library that supports matrix operations? Functions like multiply, transpose, dot-product, inverse, etc that work on (I'm guessing) vectors?
13:24	metagov	I checked math, set and a few other likely suspects but I didn't see anything.
13:28	dnolen	metagov: incanter might have something, http://wiki.github.com/liebke/incanter/matrices
13:32	notsonerdysunny	how can I do something like "import javax.media.* " in clojure?
13:33	chouser	notsonerdysunny: that's explicitly unsupported
13:33	metagov	dnolen: nifty. Incanter is a whole lot more than I was looking for but very nice. Thanks
13:33	ninjudd	dnolen: the new version of cake lets you run clojrue shell scripts with just #!/usr/bin/env cake
13:33	chouser	notsonerdysunny: but you can (import (javax.media Foo Bar Baz))
13:34	dnolen	ninjudd: sweet!
13:34	dnolen	ninjudd: so can I get the raw arguments via a bound var as well?
13:34	ninjudd	dnolen: if the first argument has a / in it, it assumes the task is 'run'
13:35	ninjudd	dnolen: sure, i could just bind, command-line-args
13:36	dnolen	ninjudd: how about just bake/args ? :)
13:37	ninjudd	either is fine with me. command-line-args would possibly allow existing code to work as-is
13:38	ninjudd	but there may be some value in leaving that to the args from when the jvm was started
13:39	dnolen	ninjudd: good call. I'm okay with command-line-args
13:44	tastapod	can someone help me with a n00b vimclojure problem?
13:46	kencausey	tastapod: it's best to just state the problem right out
13:47	tastapod	I've got nailgun running, and ng is on my path (I'm running ubuntu 10.4), but vim complains about ng classpath problems
13:47	ninjudd	dnolen: just added it to 0.3.13-SNAPSHOT
13:47	tastapod	sorry kencausey - been a while since I was on irc :)
13:47	kencausey	PATH and CLASSPATH are not the same thing
13:47	kencausey	but I'm no vim user so I could be way off-base
13:48	tastapod	I know - so I have clojure.jar, clojure-contrib.jar and vimclojure.jar on my CLASSPATH, and it's exported
13:48	clojurebot	vimclojure is state-of-the-art
13:48	tastapod	I run ng on the command line and it works ok
13:52	dnolen	ninjudd:great, thx!
13:52	dakrone	tastapod: do you have anything exported in CLOJURE_EXT?
13:52	tastapod	nope - what does that do?
13:59	dakrone	it tells nailgun which paths you want in your classpath
14:00	dakrone	for example, mine is: export CLOJURE_EXT=/Users/hinmanm/.vimclojure:/Users/hinmanm/.cljr/lib:./lib:./classes:./src:.
14:00	arkh	is it idiomatic to say (let [a 10 b 20 c (+ a b)] ... ) so long as the symbols 'a' and 'b' do something useful like label an otherwise "magic number", etc. ?
14:00	arkh	and the form assigned to c is really more complex than that
14:03	qbg	As long as the names are descriptive, I don't see why not
14:04	arkh	cool. And they are in what I'm writing.
14:04	tastapod	there's an error message that flashes up briefly as I start vim
14:05	tastapod	which says: Could not determine the Namespace of the file.
14:08	kencausey	tastapod: sounds like google fodder to me
14:09	dakrone	yea, I would check google and send an email to the mailing list tastapod
14:09	dakrone	I would help more but I'm being overwhelmed at work
14:11	arkh	dakrone: anything cool? :)
14:12	tastapod	kencausey: yup, I've googled it - no joy :( thought it would be a noob question!
14:12	dakrone	arkh: a major power outage that knocked out our lab :P
14:12	arkh	dakrone: bummer
14:21	kencausey	tastapod: Might be, the trick is finding the right niche community perhaps, too many in this space right now to immediately connect with the right one.
14:23	dakrone	tastapod: sent you a pm, lemme know
14:37	anonymouse89	dakrone: I'm doing an NLP project and encountered your opennlp wrapper. I haven't yet used it, but I want to send a big thank you in advance. Also, I'm wondering if you know of a wraper for the stanford parser (shouldn't be too hard to do myself, but if it's already been done...)
14:39	dakrone	anonymouse89: the most similar thing would be the treebank-parser that's in clojure-opennlp
14:40	dakrone	depending on what info you need out of the parse, it may work for you :)
14:42	dakrone	anonymouse89: the wrapper has tagging and parsing, but lacks coref, typed dependencies and training (amongst other things)
14:49	dakrone	anonymouse89: I'm out for lunch, but I'm keen to hear any feedback you have, send me an email/pm if you have any :)
15:37	arkh	what could cause clojure to block on a call to (send-off) ? I'm working with some DatagramSocket proof of concept code here: http://gist.github.com/521574
15:38	chouser	you're using send-off incorrectly
15:38	chouser	you want something more like (send-off udp-sender send-packet message)
15:39	arkh	oh - thank you
15:39	chouser	then send-packet needs to take two args, [agent-previous-value text]
15:39	chouser	similarly receive-packet would have to take an arg for the old agent value
15:40	arkh	agent-previous-value ?
15:40	arkh	I'll look at docs, too
15:40	chouser	well ... it looks like you're pretty much ignoring the values held by the agents
15:41	arkh	true :( I'm still in the process of making the udp stuff more functional or clojure-ish
15:41	chouser	which is sometimes a hint that agents themselves are not the right construct to use.
15:41	arkh	I need different threads to share data so I went with agents
15:41	arkh	and the Thread/sleep stuff is hackery until I have something proper
15:41	chouser	sure, but there are other thread abstractions besides agents
15:42	chouser	'future' comes to mind.
15:42	raek	would it be considered ideomatic to use agents when one does not care about any state, but want the function queue features?
15:42	chouser	raek: I think so. The alternatives I can think of (Executor + blocking queue for example) are much messier
15:43	raek	yeah
15:43	arkh	I have a vague notion of futures - I'll check their fit for this, too
15:45	arkh	chouser: , raek: thank you for the feedback
15:46	chouser	arkh: it is possible you'll be wanting queuing behavior for your listener and sender, in which case agents may indeed be justified
15:49	arkh	chouser: what I eventually want is something that maintains order of what comes in and what comes out, fifo, so the natural queuing of agents will probably help. That may change as I get into it further and/or look at futures etc.
15:49	raek	chouser: you always seem to find the that wording I'm looking for...
15:49	raek	:)
15:51	chouser	raek: I could tell it was what you were driving at. :-)
16:07	Nikelandjelo	java.awt.Color contains static constants for different colors. I need to make map where key is the color name and value is the color. I have following variant http://gist.github.com/521623 But maybe somebody can show simpler variant?
16:14	lancepantz	heh, github lists clojure jobs under "Futuristic Stuff"
16:16	Raynes	Appropriately.
16:25	chouser	,(import 'java.awt.Color)
16:25	clojurebot	java.awt.Color
16:26	chouser	,(->> Color .getFields (map (juxt #(.getName %) #(.get % Color))) (filter (fn [[name color]] (and (= name (.toUpperCase name)) (instance? Color color)))) (into {}))
16:26	clojurebot	{"GRAY" #<Color java.awt.Color[r=128,g=128,b=128]>, "GREEN" #<Color java.awt.Color[r=0,g=255,b=0]>, "CYAN" #<Color java.awt.Color[r=0,g=255,b=255]>, "WHITE" #<Color java.awt.Color[r=255,g=255,b=255]>, "MAGENTA" #<Color java.awt.Color[r=255,g=0,b=255]>, "LIGHT_GRAY" #<Color java.awt.Color[r=192,g=192,b=192]>, "DARK_GRAY" #<Color java.awt.Color[r=64,g=64,b=64]>, "ORANGE" #<Color java.awt.Color[r=255,g=200,b=0]>, "RED" #<Colo
16:26	chouser	Nikelandjelo: how's that?
16:29	Nikelandjelo	chouser: Cool! :) juxt - funny function, I've never seen it before :) Thanks
16:41	pdk	(doc ->>)
16:41	clojurebot	"([x form] [x form & more]); Threads the expr through the forms. Inserts x as the last 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 last item in second form, etc."
16:41	pdk	(doc ->)
16:41	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."
16:55	vmind	Any help on whether this compilation error with deftype/mutable/locking http://gist.github.com/521695 is a more complex case of http://www.assembla.com/spaces/clojure/tickets/274 or different, before I file a bug?
18:04	mabes	,(byte \a)
18:04	clojurebot	java.lang.ClassCastException: java.lang.Character cannot be cast to java.lang.Number
18:05	mabes	^ what am I missing? How would I coerce a char into a byte?
18:07	mabes	looking at the source it is clear that (byte) is only intended to coerce Numbers... I just expected it be able to cast a char as well I gues..
18:09	lancepantz	,(byte (Character/getNumericValue \a))
18:09	clojurebot	10
18:14	mabes	lancepantz: great, thanks! I thought \a was the primitive char at first
18:14	spewn	\a is the primitive char.
18:15	spewn	getNumericValue doesn't do the same as casting to a number
18:15	spewn	,[(int \a) (Character/getNumericValue \a)]
18:15	clojurebot	[97 10]
18:15	mabes	,(class \a)
18:15	clojurebot	java.lang.Character
18:16	spewn	Oh, sorry. /That/ primitive
18:16	mabes	:)
18:29	spewn	,(class 5)
18:29	clojurebot	java.lang.Integer
18:29	spewn	Is anything in Clojure a Java primitive?
18:31	dnolen	spewn: Clojure has support for primitive types and arrays of primitive types
18:31	dnolen	,(int-array [1 2 3])
18:31	clojurebot	#<int[] [I@533180>
18:32	dnolen	,(+ (double 5.0) (double 3.33))
18:32	clojurebot	8.33
18:32	dnolen	primitive math
18:40	spewn	,(class (double 1.1))
18:40	clojurebot	java.lang.Double
18:40	spewn	It's automatically casting to the object?
18:46	tomoj	class is a function
18:46	tomoj	so even if you pass a primitive it gets boxed
19:30	chouser	spewn: locals, record fields, array members, and vector members can be primitives.
19:30	chouser	function arguments are currently always boxed
19:31	spewn	I see.
19:31	spewn	chouser, tomoj, dnolen: Thanks.
19:33	chouser	,(use '[clojure.contrib.repl-utils :only [expression-info]])
19:33	clojurebot	java.io.FileNotFoundException: Could not locate clojure/contrib/repl_utils__init.class or clojure/contrib/repl_utils.clj on classpath:
19:33	chouser	oh. well, if you have contrib you can compare for example:
19:34	chouser	(expression-info '(let [i (int 5)] (+ i (int 10)))) ;=> {:class int, :primitive? true}
19:34	chouser	(expression-info '(let [i (int 5)] (+ i 10))) ;=> {:class int, :primitive? true}
19:34	spewn	chouser: Typo? I get {:class java.lang.Number, :primitive? false} for the 2nd one.
19:35	chouser	hm, you shouldn't. you're pasting it just as I wrote it?
19:35	spewn	Yes
19:35	chouser	what about just: (expression-info '(int 5))
19:36	spewn	{:class int, :primitive? true}
19:36	chouser	interesting. so that's right.
19:36	chouser	oh
19:36	spewn	Boxing is contagious?
19:36	chouser	no, you're right. I mis-pasted
19:36	chouser	that second one should have been Number, as you said.
19:36	dnolen_	spewn: unless your on equiv branch, + returns boxed numbers.
19:36	chouser	boxing is essentially contagious
19:37	chouser	dnolen_: no
19:37	chouser	spewn: because if Clojure can't be sure at compile time which primitive type it's dealing with, it'll fall back to Objects.
19:37	chouser	dnolen_: + is an :inline, so in some cases can return a primitive
19:38	dnolen_	chouser: + is declared static in the equiv branch and can always return primitives I thought
19:38	dnolen_	chouser: hmm, interesting I've never gotten good performance from + unless I wrapped all return values in primitive cats.
19:39	dnolen_	s/cats/casts
19:39	technomancy	no, I liked primitive cats better
19:39	technomancy	though there's always http://spl.smugmug.com/Humor/Lambdacats/13227630_eKt46#960526161_yXhEz
19:39	dnolen_	technomancy: yes, I was thinking that my self ;)
19:40	chouser	dnolen_: I'm not sure about the equiv branch, but + can in some cases return primtives since at least 1.1 I think
19:40	spewn	I'm seeing it return a primitive on 1.1.0
19:41	dnolen_	chouser: I remember hearing some reports from ztellman that 1.2 numeric performance had greatly degraded w/o explicit casts. I haven't used 1.1 in so long, I don't have any recollection of how well it performed.
19:42	dnolen_	spewn: in anycase, the perf of 1.2 equiv branch is sick. if you want all primitive cats, you'll get all primitive cats.
19:45	spewn	dnolen_: equiv? And sick as in good or bad?
19:45	dnolen_	spewn: heh, good.
19:47	dnolen_	spewn: you can easily get above 1e9 arithmetic ops in well under a second on a decent new laptop, basically about same perf you'd expect from pure Java.
19:47	spewn	Cool
19:49	ceptorial	http://cacti.ve.box.net/cacti/graph.php?action=view&local_graph_id=985&rra_id=all awesome
19:49	ceptorial	oops wrong room :) sorry guys
20:43	mmarczyk	http://www.marketwatch.com/story/oracle-sues-google-for-patent-infringement-2010-08-12?reflink=MW_news_stmp <- is this for real?
20:47	Raynes	Oh wow.
20:48	mmarczyk	hi Raynes :-)
20:48	mmarczyk	if you're referring to the link above -- my sentiment exactly ;-)
20:48	Raynes	I was.
20:48	Raynes	And hi. :D
20:48	mmarczyk	how's USPS doing?
20:48	Raynes	It isn't here yet.
20:49	mmarczyk	ah. hurry up guys! ...I mean, let's be patient.
20:49	Raynes	:p
20:50	Raynes	I check the mail daily (because I'm waiting for some packages from Amazon as well), so I'll let you know when it arrives.
20:51	mmarczyk	cool :-)
20:51	mmarczyk	btw, quotar's a nice name
20:51	mmarczyk	does it mean something?
20:51	Raynes	It was status-quo at first. quotar means I had been awake for too long and didn't want to actually have to think of a decent one-word name.
20:52	Raynes	Of quotar is a good name, it's purely accidental.
20:52	Raynes	;)
20:52	Raynes	if*
20:52	mmarczyk	good enough etymology for me ;-)
20:53	Raynes	Do you follow me on Github, or were you just stalking?
20:54	mmarczyk	:-P
20:54	Raynes	I think I'm getting technomancy syndrome. Too many projects. :-)
20:54	mmarczyk	I tend to follow projects
20:55	mmarczyk	occasionally I check if people whose projects I'm following happen to have started new projects ;-)
20:55	mmarczyk	my GitHub dashboard is so full I hardly look at it anyway -- I mostly follow repos so as to have all the interesting GitHub links in one place
20:57	mmarczyk	then occasionally I wonder if there's a smarter way to do things... maybe actually making the "event stream" useful? hmmmm... </end-random-musings> :-P
20:57	Raynes	quotar is my new unimportant sandboxy web project. tryclojure is too serious and important to really experiment with, so quotar is my little learning enviroment/hopefully something I can make useful.
20:59	Raynes	mmarczyk: Oh yeah, there was a little bit more to the name. I was thinking about sexpbot's "quote" system thingy, and how quotar, when finished, could be used for that.
20:59	mmarczyk	ahh, cool!
21:06	brweber2	hey all, has work begun on an implementation of clojure in javascript yet?
21:06	Raynes	The usual response to that is "bug chouser", isn't it?
21:06	chouser	brweber2: an older version of clojure was done enough to demo, but it's out of date now
21:07	brweber2	chouser is it on github? are there plans to do an impl once 1.2 is stable?
21:07	chouser	http://clojurescript.n01se.net (works ok unless you're on a mac)
21:07	chouser	brweber2: I'm not going to put more effort into it untile clojure-in-clojure is further along.
21:08	brweber2	chouser what's the status of clojure in clojure? Has real work begun now that the defprotocol/type/record stuff is in place?
21:09	chouser	defprotocl/type/record is work on cinc. :-)
21:10	brweber2	chouser right, that is the groundwork but are there more fundamental changes needed or is everything in place now?
21:10	chouser	I actually just found a proj/clojure-compiler/compiler.clj on my laptop with some 850 lines that I have no recollection of writing.
21:11	chouser	brweber2: there's plenty yet to do -- bootstrapping issues to resolve, intermediate format decisions to make, etc.
21:12	chouser	I haven't been working on it as much as I'd like because of the book, but tomorrow we're handing that off to production, so I think it'll be taking rather less time for a while.
21:12	chouser	maybe put my shoulder to finger trees finally again.
21:13	brweber2	chouser if you get back to it and would like help, let me know, I'd be interested
21:14	mmarczyk	chouser: you mean handing JoC off to production?
21:14	mmarczyk	chouser: congratulations! :-)
21:25	chouser	mmarczyk: yes, thanks!
21:26	chouser	brweber2: I think my first step will be a tool to convert the tree of pojos that Compiler.java currently produces in its analyze step into a tree of Clojure records
21:27	chouser	if everyone important (read: rhickey) can sign off on the format of that record tree, then several other things can proceed simultaneously
21:27	chouser	such as a JVM bytecode emitter, a JS emitter, and an analyzer written in Clojure.
21:28	brweber2	I wouldn't mind seeing the Reader be pluggable (not related to this) and the IParsers on the Expr's in Compiler be extracted as well
21:28	chouser	a couple people have already written readers in clojure
21:28	hiredman	cough
21:28	chouser	look, there's one now!
21:28	brweber2	yeah, I wrote an alternate reader (allows you to create a new language in no time) ... you get the compiler for free
21:29	brweber2	fantastic for prototyping new language syntax quickly to see what works and what doesn't
21:29	chouser	ah, interesting
21:30	brweber2	but I'm studying Compiler now to see what it would take (cic)
21:30	hiredman	http://github.com/hiredman/Arkham
21:30	chouser	I'm curious if it would be possible to create a C-like syntax that could be converted to clojure code and back with absolutely no loss of data, whitespace, indentation, or anything.
21:31	hiredman	bleh
21:31	chouser	such that it would be safe to convert code in that format to real clojure, edit it, test it, etc. and then convert it back to C-like syntax without danger of any spurious diffs
21:31	brweber2	as long as it is c-like I would think it wouldn't be too bad, I ended up with more do/let's than I cared for
21:32	brweber2	but c-LIKE is the key, if you have to meet an actual language syntax ... it would be too much work, if you have the freedom to change syntax were it makes sense, I would think it wouldn't be too bad
21:33	hiredman	I started using fnparse to parse the langauge used in EoP, but instead of writing an interpreter for it, I ended up just using fnparse's semantic hooks to transform it in to valid clojure and then eval it
21:34	brweber2	the one time I miss scala is when I want parser combinators. they work really well in scala.
21:34	hiredman	there are a number of clojure parser libraries, have you looked at any?
21:35	brweber2	hiredman actual eval? why didn't you just create the data structures with RT.<list> and compile them?
21:35	hiredman	fnparse is always under going a major rewrite
21:35	chouser	heh
21:35	hiredman	brweber2: that's what eval does
21:35	brweber2	hiredman I looked at a peg one that was commercial for real use, it seemed ok, but not as nice as what I was used to
21:35	hiredman	by "eval it" I mean: passed it to clojure.core/eval
21:35	hiredman	ugh, really? commercial for real use
21:36	brweber2	hiredman ah ok, that makes more sense. I thought you were writing out source as string... not sure what I was thinking there...
21:37	hiredman	the clj-peg was relicensed to the epl earlier this year
21:38	brweber2	hiredman that looks nicer than what I remember, I doubt that it was clj-peg :)
21:38	hiredman	I am mulling over using Arkham for clojurebot's eval
21:39	brweber2	hiredman just cuz or for any particular reason?
21:39	hiredman	easier to sandbox
21:40	hiredman	the draw back is it won't match clojure in all cases
21:41	hiredman	instead of running clojure, clojurebot will simulate it
21:42	brweber2	hiredman I suppose it comes down to how different it would be... if people could live with it
21:42	brweber2	what do people use it for? mostly experimentation or mostly explaining code to others?
21:42	hiredman	right
21:44	brweber2	personally I wouldn't use clojure bot for experimentation ... I'd use a local repl which means that it would be fine to swap it out (1 vote cast)
21:44	brweber2	but I have no idea how the rest of the community uses it
21:44	brweber2	or if I'm over simplifying things
21:46	brweber2	chouser hiredman so I have this crazy (not really) idea of providing an "upgrade" file with each release of a library which users of the library could "apply" to automagically update their code with changes from the library
21:47	brweber2	chouser hiredman this would allow for certain refactoring to be less painful, do you think that has any value?
21:48	brweber2	chouser hiredman it is sort of like a patch, but is not source code aware, it is namespace/var aware
21:49	chouser	lpetit has been working on refactoring tools
21:49	brweber2	chouser what sort of tools?
21:50	brweber2	counterclockwise?
21:50	clojurebot	Counterclockwise aka ccw at http://code.google.com/p/counterclockwise/
21:50	chouser	things he's plugging into that I believe, yes.
21:51	brweber2	I'll have to try to ping him later
23:56	notsonerdysunny	what is "lein swank" actually doing? is it just starting a clojure server or is it automatically loading all the clj files in the current project?
23:57	lancepantz	any lein task will start a jvm with your project's lib and src in the class path
23:58	notsonerdysunny	so it is not importing or requiring the dependencies?
23:58	lancepantz	so lein swank starts a jvm as such and loads a socket server
23:58	lancepantz	well, you have to import and refer your dependencies in whatever namespaces your working on
23:59	lancepantz	inorder to use those classes and functions
23:59	lancepantz	thats not specific to swank however