#clojure – 2010-01-23

2010-01-23

00:17	DeusExPikachu	anyone know any libraries to communicate with web servers for the purpose of automating logging in and filling out forms?
00:25	hiredman	DeusExPikachu: htmlunit
00:26	DeusExPikachu	hiredman, thanks, checking it out
00:39	tomoj	DeusExPikachu: there's also webdriver
00:39	tomoj	which can use htmlunit or real browsers, if that matters
00:40	DeusExPikachu	tomoj, interesting, thanks
05:46	esbena	I'm writing a plugin for Eclipse, but the plugin functionality could also be used in VisualStudio. Would it be an option to write the plugin backend in language neutral clojure, which is then capable of reading the plugin data-structures seamlessly as the backend could be either .NET or Java?
08:27	LauJensen	How many data visualization libs do we have yet? I need something quick and pretty for a chart rendering - dejartes perhaps?
08:35	chouser	LauJensen: have you looked at Incanter?
08:35	LauJensen	Yes - Need something else
08:35	chouser	oh
08:58	angerman	Hmm. Is there a lib that serializes/deserialized clojure data-structures? I know clojure can create a string-representation of an object (sans Java classes) that can be recreated by parsing it. But is there a libe that combines that with spit and slurp? E.g. given a structure and a file?
08:58	odrzut	I have problems with emacs 23 + swank-clojure-project - it doesn't add jars from project/lib to classpath
08:59	odrzut	when I've changed elisp code in this function swank-clojure-project it prints classpath properly
09:00	odrzut	but when I try from slime-repl (-> "java.class.path" System/getProperty (.split ,,, ":") seq) it return only standard jars
09:01	angerman	odrzut: even though what I'm about to suggest is not perfect, what I do is to use "lein swank" + slime-connect
09:01	the-kenny	odrzut: wait.. let me try your snippet
09:02	the-kenny	odrzut: hm.. can't reproduce. Are the jars in lib/? Where have you got swank-clojure? elpa?
09:03	odrzut	yes - I've installed from elpa
09:03	odrzut	and when I try lein swank + slime-connect I have the same problem
09:03	the-kenny	that's really strange
09:04	odrzut	I've probabyl broken emacs configuration somehow
09:04	odrzut	so it changes classpath after loading it by swank-clojure-project
09:08	odrzut	here is my .emacs - I've fiddled with it a little trying to add native libs by hand
09:08	odrzut	http://www.nopaste.pl/l9c
09:08	odrzut	but I'm noob with elisp
09:11	the-kenny	odrzut: I'd try commenting out the swank-clojure-*-path stuff
09:11	the-kenny	You don't need this if you use leiningen and swank-clojure-project
09:13	the-kenny	If this doesn't work, you should double-check (or show us) the project you're using
09:17	jlb	angerman: You can do something like (with-in-str (slurp filename) (read)) or you could use with-in-reader from duck-streams
09:17	angerman	jlb: exactly. I was just wonderig if there was a library already that provided that functionallity out of the box
09:21	jlb	angerman: that is out of the box, IMO. :) If you want to process data structures as they come in, use with-in-reader. If you're just reading the whole file into a var, use the first form.
09:23	angerman	jlb: I do get your point. I guess I'll write my own wrappers. It's just like having (let [struct (read "file")]) (write "file" struct) were nice conviniences.
09:30	LauJensen	Can someone please explain this phenomena to me. When I start heavy computations single threadedly, core#1 goes to about 100% while core#2 idles at 20% presumable keeping the OS running. After about 120 seconds they switch, so c#2 goes to 100% while c#1 idles at 20% - They keep doing this at random intervals between 15 - 120 seconds throughout the computation
09:32	odrzut	maybe it's to keep temperatures more equal ?
09:34	LauJensen	So you suspect the OS is moving it ?
09:34	angerman	LauJensen: sure. It must be the os scheduler. I hadly think java's internal reach so far as to selec the cpu.
09:34	odrzut	I don't know how to move thread from one core to the other programmaticaly
09:35	the-kenny	I'd also blame the os.
09:35	LauJensen	Makes sense
09:35	the-kenny	You should try it with a similiar program in python or so
09:38	odrzut	thanks to all, my emacs saw the Classpath :)
09:38	odrzut	I've removed everything except elpa stuff from .emacs, and tried with slime-connect
09:49	somejan	,(. Short TYPE)
09:49	clojurebot	short
09:49	somejan	,(let [t Short] (. Short TYPE))
09:49	clojurebot	short
09:49	somejan	,(let [t Short] (. t TYPE))
09:49	clojurebot	java.lang.IllegalArgumentException: No matching field found: TYPE for class java.lang.Class
09:50	somejan	any way to make such a construction work? with the type passed in as an argument?
10:07	LauJensen	somejan: You're calling TYPE as if it were a method of Short, which its not, its a public static final field
10:07	LauJensen	I'm not sure if there's a way to alias that
10:08	krumholt	you could do (let [t Short] (Class/forName (.getName t)))
10:08	krumholt	,(let [t Short] (Class/forName (.getName t)))
10:08	clojurebot	java.lang.Short
10:09	somejan	,(let [t Short] (. (Class/forName (.getName t)) TYPE))
10:09	clojurebot	java.lang.IllegalArgumentException: No matching field found: TYPE for class java.lang.Class
10:09	somejan	hmm
10:09	somejan	not yet
10:10	somejan	,(Class/forName (.getName Short))
10:10	clojurebot	java.lang.Short
10:10	somejan	,(Class/forName (.getName Short/TYPE))
10:10	clojurebot	java.lang.ClassNotFoundException: short
10:10	somejan	It doesnt seem to work with primitives
10:11	somejan	Any way to pass (some representation of) primitive types around in parameters?
10:14	the-kenny	I don't think so. As far as I know, parameters are always boxed
10:16	somejan	What I want is some kind of representation of the primitive type, so I can pass that to (make-array type [stuff])
10:17	the-kenny	Oh, you mean the class?
10:17	the-kenny	Try something like (make-array Integer/TYPE)
10:17	the-kenny	,(class Integer/TYPE)
10:17	clojurebot	java.lang.Class
10:18	slava	,(class (fn ()))
10:18	clojurebot	java.lang.NullPointerException
10:18	slava	,(class (fn []))
10:18	clojurebot	sandbox$eval__5151$fn__5153
10:18	somejan	That's what I was trying, but can the class be passed in by a parameter?
10:18	the-kenny	somejan: Yes
10:20	the-kenny	hm.. wait
10:20	somejan	how? this doesn't work:
10:20	somejan	,(let [t Integer/TYPE] (make-array t [1 2 3]))
10:20	clojurebot	java.lang.ClassCastException: clojure.lang.PersistentVector cannot be cast to java.lang.Character
10:21	somejan	,(let [t Integer] (make-array (. t TYPE) [1 2 3]))
10:21	clojurebot	java.lang.IllegalArgumentException: No matching field found: TYPE for class java.lang.Class
10:23	krumholt	,(let [t java.lang.Integer] (make-array t 10))
10:23	clojurebot	#<Integer[] [Ljava.lang.Integer;@1774e9>
10:24	krumholt	or also
10:24	krumholt	,(let [t Integer/TYPE] (make-array t 10))
10:24	clojurebot	#<int[] [I@c71b37>
10:24	the-kenny	somejan: there you are :)
10:24	somejan	thx
10:25	somejan	so
10:25	somejan	,(let [t Integer/TYPE] (make-array t 10))
10:25	clojurebot	#<int[] [I@150c82>
10:25	somejan	works, but
10:25	somejan	,(let [t Integer/TYPE] (make-array t [10 11 12]))
10:25	clojurebot	java.lang.ClassCastException: clojure.lang.PersistentVector cannot be cast to java.lang.Character
10:25	somejan	doesn't
10:25	somejan	???
10:25	krumholt	because if you need more dimesnsion you need to do
10:26	somejan	no, i meant
10:26	krumholt	,(let [t Integer/TYPE] (make-array t 10 11 12))
10:26	clojurebot	#<int[][][] [[[I@f1369f>
10:26	krumholt	make-array is not filling the array
10:26	krumholt	it is just creating it
10:26	somejan	ah, wait
10:26	krumholt	,(doc make-array)
10:26	clojurebot	"([type len] [type dim & more-dims]); Creates and returns an array of instances of the specified class of the specified dimension(s). Note that a class object is required. Class objects can be obtained by using their imported or fully-qualified name. Class objects for the primitive types can be obtained using, e.g., Integer/TYPE."
10:26	somejan	im confusing make-array and into-array
10:27	somejan	,(let [t Integer/TYPE] (into-array t [1 2 3]))
10:27	clojurebot	#<int[] [I@b053b>
10:37	tmountain	is there a way to alias a function to another name within the current namespace?
10:38	the-kenny	tmountain: There's def-alias in contrib?
10:38	Chousuke	(doc alias)
10:38	clojurebot	"([alias namespace-sym]); Add an alias in the current namespace to another namespace. Arguments are two symbols: the alias to be used, and the symbolic name of the target namespace. Use :as in the ns macro in preference to calling this directly."
10:38	Chousuke	hmm
10:38	tmountain	I'm familiar with the alias function, which aliases a namespace
10:38	the-kenny	,(use 'clojure.contrib.def)
10:38	clojurebot	nil
10:38	the-kenny	,(doc defalias)
10:38	clojurebot	"([name orig] [name orig doc]); Defines an alias for a var: a new var with the same root binding (if any) and similar metadata. The metadata of the alias is its initial metadata (as provided by def) merged into the metadata of the original."
10:39	tmountain	so defalias is the solution?
10:39	Chousuke	or just (def foo bar)
10:40	Chousuke	if you don't mind losing the metadata
10:40	tmountain	cool, thanks guys ;-)
10:41	tmountain	should've thought of using def
10:41	Chousuke	it's not a true alias though. it creates a new var
10:41	tmountain	this is mainly for DSL purposes
10:41	Chousuke	should be fine then
10:41	tmountain	I want to duplicate a function with a couple of names that make sense for the context they're called in
10:42	tmountain	have a nice weekend
10:45	datka	Does anyone know what this error means? java.lang.VerifyError: class clojure.contrib.duck_streams$loading__4757__auto____1893 overrides final method meta.()Lclojure/lang/IPersistentMap; (http.clj:1)
10:45	datka	I'm trying to build a pom file for a library that doesn't have one
10:48	duck1123	my pom file is at http://gist.github.com/284653 if it helps
10:49	the-kenny	duck1123: ugh... why not use leiningen?
10:51	duck1123	I haven't really messed much with leiningen yet. This was someone elses project I wanted to play with, and I'm used to maven
10:53	duck1123	does leiningen do swank servers yet?
10:54	the-kenny	"lein swank"?
10:54	the-kenny	Yes
10:54	the-kenny	You can also do M-x swank-clojure-project
13:22	tolstoy	If you have a raw form in your ns, like, say, (init), that'll get evaluated and run at compile time AND load time (in an AOT context), right?
13:23	tolstoy	Can you do something like (if-not compile-files (init)) so that it doesn't run during compilation, but have it still work when run after AOT compilation?
13:23	Chousuke	hmm
13:23	Chousuke	,compiling
13:23	clojurebot	java.lang.Exception: Unable to resolve symbol: compiling in this context
13:24	Chousuke	some var like that exists but I don't remember what it was called
13:24	tolstoy	compile-files
13:24	tolstoy	compile-files
13:24	tolstoy	var
13:24	tolstoy	Set to true when compiling files, false otherwise.
13:24	Chousuke	ah, duh
13:25	tolstoy	I was just wondering if "loading" the code (when it's compiled into a jar) would actually do the init.
13:25	Chousuke	why don't you test? :/
13:25	tolstoy	I guess I can crank up this app and see. ;)
13:25	AndiXng	hi
13:26	AndiXng	sorry for this newbie question, but I could not find enough information: I am looking for a vector or list where it is possible to insert/remove elements in the middle
13:26	AndiXng	what is the best way to do that? zippers?
13:27	Chousuke	no efficient collection supporting that exists right now. :/
13:27	Chousuke	you might want to try using maps
13:27	AndiXng	hm
13:28	AndiXng	but with trees, this should be easy (O(log n) is ok for me)
13:29	AndiXng	do you know any clojure lib that provides structures with insert/remove?
13:29	Chousuke	well, maps are your best bet.
13:29	Chousuke	vectors are trees but they don't support efficient insertion in the middle
13:30	Chousuke	chouser is working on finger trees but I don't think it's ready yet :/
13:30	AndiXng	I don't understand yet, how to use maps. should I select indices "with gaps" and fill them over time, any, if necessary, recompute all keys?
13:31	AndiXng	-any +and
13:31	Chousuke	don't understand maps?
13:31	AndiXng	I understand maps
13:31	Chousuke	they're just, well, maps.
13:31	Chousuke	:P
13:32	AndiXng	but give me an example, please. let's say we have a list 1,2,4,5 and want to insert 3
13:32	Chousuke	you could emulate a vector with one by using integer keys
13:32	AndiXng	how to represent 1,2,4,5 as a map?
13:32	Chousuke	well, the map would be indexed of course
13:32	Chousuke	hmm
13:32	AndiXng	{0 1, 1 2, 2 4, 3 5}?
13:33	Chousuke	I suppose that wouldn't help /:
13:33	AndiXng	yeah
13:34	Chousuke	hm. I guess you're out of luck
13:34	AndiXng	i thought about using sorted-set with pair items: [position-information, content]
13:34	AndiXng	absolutely.
13:34	AndiXng	:-D
13:34	Chousuke	clojurebot: finger trees
13:34	clojurebot	Titim gan éirí ort.
13:34	Chousuke	psh
13:36	Chousuke	http://github.com/Chouser/finger-tree apparently finger trees could be of use for you, but I don't know if chouser's implementation is at all ready for use yet (or even how to use it)
13:37	AndiXng	as already said, my idea would be to use a sorted-set with pair items [position-information, content]. i would use gaps inbetween and fill them over time, and when necessary, recompute all keys.
13:37	AndiXng	example: #{[0 1] [100 2] [200 4] [300 5]} . when 3 is added at position 2, then #{[0 1] [100 2] [150 3] [200 4] [300 5]}
13:37	AndiXng	I think this could be "ok"
13:37	AndiXng	but still O(n)
13:37	AndiXng	:-/
13:37	AndiXng	ok I'll have a look at finger trees, thanks
13:38	AndiXng	but I wonder why nobody else had this problem before... o_O
13:38	AndiXng	it's very common to insert and remove elements I think...
13:38	AndiXng	at least if you come from an imperative language
13:38	Chousuke	well, you're not the first one to have this problem, but it's apparently not common enough
13:39	Chousuke	otherwise Clojure would have some data structure for efficient insertion and removal from the middle I guess. :)
13:40	Chousuke	are you sure you can't come up with another algorithm that doesn't require insertions or removals? :/
13:42	AndiXng	well, that's part of the application domain
13:42	AndiXng	if I have a list where elements can be inserted and removed, I should implement this with a list where elments can be inserted and removed
13:43	AndiXng	I just found out how pcollections (Java persistent data structures lib) does it
13:43	AndiXng	logarithmic time, like in "Glasgow Haskell Compiler"
13:43	AndiXng	hm
13:43	AndiXng	probably I'll use that
13:44	AndiXng	I could also write a clojure lib with that algorithm
13:44	AndiXng	hmmmm
13:44	AndiXng	what do you think, would that be useful for anybody but me?
14:23	tolstoy	chouser: Yes, you can use compile-files to NOT evaluate forms when AOT compiling, but the forms DO get evaluated when the code is loaded.
14:24	LauJensen	Is that 'Practical Clojure' by Luke Vanderhart any good?
14:24	tolstoy	Now, if I can just figure out how to close a buffer in text-mode emacs....
14:25	LauJensen	M-x kill-buffer
14:25	tolstoy	Ah "kill" was the word.
14:25	tolstoy	C-x k seems to work, too.
14:49	tolstoy	When you access @atom, is that a synchronized read?
15:34	somejan	,(def x 1)
15:34	clojurebot	DENIED
15:45	somejan	`{ ~@'(:a 1) }
15:45	somejan	,`{ ~@'(:a 1) }
15:45	clojurebot	1
15:46	somejan	,`{ ~b }
15:46	clojurebot	1
15:46	somejan	On my console that says "java.lang.ArrayIndexOutOfBoundsException: 1"
15:48	chouser	somejan: yeah, that's not really supported
15:49	somejan	,{1}
15:49	clojurebot	java.lang.ArrayIndexOutOfBoundsException: 1
15:50	somejan	,`{~b}
15:50	clojurebot	1
15:54	dnolen	somejan: if you wan to splice into a hashmap in a macro use hash-map and not the literal syntax
15:54	somejan	Is the literal syntax supposed to not work in macros?
15:55	dnolen	somejan: I haven't been able to get it to work, but only when trying to splice in values, but perhaps someone else knows different
15:58	chouser	I think the problem is that we're forgetting this code is actually data
15:59	chouser	it doesn't quite work like this today, but `{~@b} could be read as (syntax-quote {(unquote-splice b)})
16:08	chouser	which means an outer list with two elements, the first the symbol syntax-quote, the second a map
16:08	chouser	but that map only has a single item in it, a list. That's not legal
16:09	Chousuke	I tried to implement syntax-quote like that.
16:09	Chousuke	I wasn't very succesfull :P
16:10	chouser	oh, yeah? I think rhickey wants it, or at least wanted to know if anyone knew if it was possible.
16:10	chouser	hm...
16:10	Chousuke	it's possible, but nesting and autogensyms complicate it a fair bit
16:11	chouser	ah, interesting.
16:11	Chousuke	and implementing the symbol resolution wasn't exactly pleasant either (I think I have working code for that, at least, but it's very ugly)
16:12	chouser	did you still try to do the autogensym at read time?
16:13	Chousuke	my current reader just runs the syntax-quote function at read-time
16:14	Chousuke	it works, as far as I can tell, but if I turn it into a macro I run into problems :/
16:15	Chousuke	as far as I can tell it works because running the function at read time expands the inner syntax quotes first,
16:16	chouser	I can certainly beilieve that it all gets very hairy very quickly.
16:16	chouser	how did you handle autogensym? b# reads as (autogensym b) or as b_123 ?
16:16	chouser	or just as b# ?
16:16	chouser	,b#
16:16	clojurebot	java.lang.Exception: Unable to resolve symbol: b# in this context
16:17	chouser	,'b#
16:17	clojurebot	b#
16:17	Chousuke	it expands to b_234, but only within `
16:17	Chousuke	,'`f#
16:17	clojurebot	(quote f__5223__auto__)
16:17	Chousuke	I guess I should find some time to work on the reader again
16:17	chouser	ok, so you do it at read time like Clojure does now.
16:18	Chousuke	yeah
16:20	Chousuke	http://github.com/Chousuke/clojure/blob/new/clojure-reader/src/clj/clojure/lang/reader/internal.clj this is how it is at the moment
16:21	Chousuke	still uses the ^ reader macro, too :P
16:33	somejan	,{:a}
16:33	clojurebot	java.lang.ArrayIndexOutOfBoundsException: 1
16:34	somejan	Is this supposed to be an IOBE instead of an IllegalArgumentException?
16:34	somejan	,(hash-map :a)
16:34	clojurebot	java.lang.IllegalArgumentException: No value supplied for key: :a
16:36	somejan	The exception comes from PersistentArrayMap.java:217, where the code is actually trying to index an array
16:36	somejan	It looks like a bug to me, but maybe someone knows if it's a feature before I make an issue?
16:43	tolstoy	does defmacro actually pay attention to its attr-map?
16:43	tolstoy	As in, (defmacro name "doc" #{:private true}....)?
16:46	tolstoy	Ah, the arglist documentation for defmacro is wrong.
16:46	Chousuke	somejan: it's a "feature"
16:47	Chousuke	somejan: {:a} is not a valid literal in any case.
16:47	Chousuke	somejan: and it doesn't really matter what exception it generates :)
16:48	somejan	hmm, I'd say clojure also needs to give the right error messages
16:48	Chousuke	well, yeah
16:49	somejan	at the very least a descriptive message, instead of just "1"
16:49	Chousuke	I guess it's the "no-one wants to work on the compiler" excuse again :P
16:50	Chousuke	though this one is actually generated within the reader
16:50	somejan	ah, but then it is in fact a bug :)
16:50	somejan	and not a feature
16:51	somejan	So, is this the kind of thing that should go in the bugtracker?
16:59	hiredman	somejan: it's undefined behaviour
17:00	somejan	I didn't know Clojure had a language specification, even one which allows undefined behaviour :P
17:01	hiredman	,{:a}
17:01	clojurebot	java.lang.ArrayIndexOutOfBoundsException: 1
17:01	somejan	But I still think undefined behaviour should produce a descriptive error message
17:01	hiredman	shrug
17:02	somejan	{:a} isn't a real problem, but when it is in a macro it can be hard to find
17:02	somejan	(which is where I first ran into this)
17:04	hiredman	sure, but how big of an issue?
17:04	hiredman	clojurebot: ticket search ArrayIndexOutOfBoundsException
17:04	clojurebot	()
17:04	hiredman	:\|
17:05	hiredman	clojurebot: ticket search map literal
17:05	clojurebot	("#87: GC Issue 83: \t PersistentArrayMap trust the reader (map literals) too much")
17:05	hiredman	clojurebot: ticket #87
17:05	clojurebot	{:url http://tinyurl.com/y92lmv8, :summary "GC Issue 83: PersistentArrayMap trust the reader (map literals) too much", :status :new, :priority :low, :created-on "2009-06-17T20:36:09+00:00"}
17:33	alexyk	is there a method to get the number of day, whether in the year or Julian/Gregorian, from the old silly java.util.Date?
17:33	chouser	day of the year, or something else?
17:33	alexyk	and can somenody with the sysop please do -R on this channel?
17:33	alexyk	chouser: day of year is a good start
17:34	alexyk	Joda Time has dayOfYear, and with juDate I'm at a loss, some stupid calendar and <whatnot>
17:38	chouser	,(.get (java.util.Calendar/getInstance) java.util.Calendar/DAY_OF_YEAR)
17:38	clojurebot	23
17:38	alexyk	ok
17:42	hiredman	I have a patch for #87 and the {:a} issue: http://www.thelastcitadel.com/lab/map-literals-error.diff
17:43	hiredman	chouser: maybe you could take a look at put it in assembla :)
17:44	chouser	hiredman: if it's a fix to an accepted bug, you should go ahead and attach it.
17:45	hiredman	I guess this is as good a time as any to send and email to ask to be allowed to do that sort of thing
17:47	hiredman	I send an email to dev right?
17:50	alexyk	no car and cdr in core??
17:50	chouser	first rest
17:50	alexyk	chouser: yeah, but no car and cdr?! :)
17:51	chouser	nope
17:51	the-kenny	car and cdr is to old-school for a modern lisp
17:51	alexyk	well just as an homage to lisp they'd better be there
17:52	alexyk	sounds like a bow to the general dumbing0down of the universe
17:52	alexyk	to help Britney Spears learn a lisp
17:53	hiredman	car and cdr are the names of registers on machines no one uses anymore
17:53	krumholt_	it seems that with 1.1 "apply" has changed and i can no longer do (apply foo) but i have to do (apply foo nil) why is that?
17:54	hiredman	are you sure?
17:54	hiredman	I don't think (apply foo) ever worked
17:54	krumholt_	it did
17:54	krumholt_	i used it a lot and now i have to change a lot :)
17:56	alexyk	never mind...
17:56	hiredman	well I'll be damned
17:57	hiredman	there is a commit that mentions apply back in august
17:58	krumholt_	well i haven't upated in a while :) i just see no reason to change the behaviour
17:58	hiredman	ok
17:58	alexyk	chouser: so you get day of year for a calendar, not an existing java.util.Date. Is one supposed to create a Calendar of juDate? Or get the Calendar from juDate?
17:58	chouser	actually, 'cdr' would be pretty misleading. Clojure's 'rest' is not the same thing
17:58	hiredman	apply got arity overloads, and has no arity for the zero arg case
17:59	krumholt_	could that be redone?
17:59	krumholt_	(apply foo) also seems even prettier then ((foo))
18:00	the-kenny	Isn't (apply foo) different to ((foo))?
18:00	alexyk	chouser: I just think that car and cdr may co-exist with first and rest, to claim the lisp's inheritance
18:00	the-kenny	Should be (apply (foo))
18:01	chouser	,(.get (doto (java.util.Calendar/getInstance) (.setTime (java.util.Date.))) java.util.Calendar/DAY_OF_YEAR)
18:01	clojurebot	23
18:01	hiredman	the-kenny: right (apply foo) would just be (foo)
18:02	hiredman	http://github.com/richhickey/clojure/commit/5ca86e045bd5742566c647dcc46b8e546a6a7c06 is the commit
18:03	hiredman	your best shot would be taking it to the mailing list since rhickey doesn't appear to be in
18:03	alexyk	chouser: right... Do you think that crating one instance and then setTime/get day of year for each of a gazillion juDate's is faster than converting each to a DateTime and calling getDayOfYear on each? I guess I'll have to benchmark.
18:03	chouser	beats me
18:04	alexyk	can't wait when they induct DateTime into core Java so we can forget the nightmarish juDate/Calendar crap
18:15	the-kenny	Which contrib should I use with clojure 1.1.0 (leiningen)
18:15	the-kenny	+? :)
18:53	somejan	Is there a way to make compiled clojure code be in a specific package, so it can access protected methods on java classes in the package?
18:54	somejan	The :gen-class thing apparently just puts the stub class in the package, but not the real code
18:54	the-kenny	somejan: There's a hack in contrib: wall-hack-method
18:55	the-kenny	It uses reflection to call protected (or private) methods
18:55	somejan	ah, I'll have a look
18:55	the-kenny	I think it's in java-utils
19:07	somejan	It works, but only to read fields, not to write them. I don't see anything in that namespace that will write fields, so guess I'll have to hack it myself
19:14	tomoj	say you've got a big tsv file and you want to treat it as a lazy seq of structmaps
19:15	somnium	so, is there a standard way to load somefile.txt off the classpath? Ive only been able to get duckstreams to work with absolute paths/paths relative to pwd
19:15	tomoj	does writing a macro with-tsv which with-opens the file, binds the lazy seq of structmaps, then checks what the body returns and wraps a doall if it's a seq sound like a reasonable approach?
19:16	tomoj	it seems kind of strange.. this macro must be used at the top level of whatever processing you're doing, to ensure the file doesn't close before you're done
19:16	tomoj	read-lines is cool but what if we don't consume the entire seq? :/
19:17	tomoj	somnium: you can make it a "resource"
19:18	somnium	tomoj: how to do that? (I only seem to find some java idiom (-> this .getClass .getClassLoader ...) on google)
19:18	tomoj	yep, that's what I meant
19:18	tomoj	except
19:18	tomoj	(.getResource (clojure.lang.RT/baseLoader) "foo.txt")
19:18	tomoj	gives you a URL
19:19	somnium	ah, nice
19:19	somnium	thx!
19:19	tomoj	might be good to stuff everything into a resources/ subdir and add that to the classpath
19:19	tomoj	if the paths are coming from users
19:20	tomoj	I think lein adds resources/ to the classpath by default
19:20	krumholt_	anyone know where i can find some information on protocols? preferably a screencast
19:21	tomoj	if you find a screencast let me know!
19:21	tomoj	I still don't understand them
19:25	AWizzArd	Currently Clojure has the EP License. Could Rich in principle change the license if he wanted without the agreement of other contributors?
19:26	hiredman	yes
19:26	hiredman	the CA assigns joint copyright
19:26	AWizzArd	Is this because he is the initial contributor?
19:27	AWizzArd	ah ok
19:27	AWizzArd	Otherwise I would understand the EPL in such a way that as soon some other author publishes any code and the initial contributor includes this in his code base it would not be possible anymore to get rid of the EPL
19:30	AWizzArd	hiredman: do you know if Rich used an existing license as his CA, or did he wrote it himself?
19:31	AWizzArd	nevermind
19:31	AWizzArd	just saw it at the bottom, that he used something that Suns lawyers wrote
19:40	hiredman	the ability to change licenses if needed is the whole point of the CA
19:54	alexyk	,(let [{:keys [a b]} {:a 1}] (println a))
19:54	clojurebot	1
19:54	alexyk	,(let [{:keys ["a" b]} {"a" 1}] (println a))
19:54	clojurebot	java.lang.Exception: Unsupported binding form: a
19:54	alexyk	,(let [{:keys [a b]} {"a" 1}] (println a))
19:54	clojurebot	nil
19:54	alexyk	so, does :keys only support keywords?
19:55	the-kenny	alexyk: I think so
19:57	alexyk	is there a fascinating tour of data massage you can type into a repl before a group of noobs to bedazzle them?
20:00	the-kenny	Something with a lazy-seq would be cool
20:00	the-kenny	like (take 100 (small-function-for-calculating-fibonaccis)
20:00	the-kenny	+)
20:18	krumholt_	hi i created a simple protocol for a list. could someone take a look if thats how one would use a protocol? especially my use of new seems strange.
20:18	krumholt_	http://paste.lisp.org/display/93815
21:29	AWizzArd	when I have a sorted set of 1000 elements, can i then get a subset or subseq of the elements 450 to 500?
21:34	chouser	AWizzArd: put them in a sorted set (or map) and use 'subseq'
21:35	AWizzArd	they already are in a sorted set
21:35	chouser	there you go. subseq.
21:35	chouser	oh
21:35	chouser	subseq is based on the value, not the position
21:35	AWizzArd	yes
21:36	chouser	if you want position, I guess I'd put them in a vector and use subvec.
21:36	AWizzArd	probably
21:36	AWizzArd	oki
21:45	blbrown_win	'
21:45	blbrown_win	,(/ 5 9)
21:45	clojurebot	5/9
21:46	blbrown_win	,(/ 5.0 9.0)
21:46	clojurebot	0.5555555555555556
23:05	datka	If I invoke "lein swank" shouldn't my source code (or the jar) be on the classpath somewhere?
23:06	datka	I'm printing out the urls in my classpath, and I'm seeing the root of the project, but not the src/ directory
23:09	tomoj	hmm, I wonder if we can deal with the no threads restriction on app engine :(
23:26	alexyk	chouser: check it out: http://paste.pocoo.org/show/169141/
23:28	datka	so does anyone uses leiningen with swank that knows what I might be doing wrong?
23:36	chouser	alexyk: oh, my. DateTime is from JodaTime?
23:56	quotemstr	Why does clojure use type hints instead of CL-style DECLARE?