#clojure – 2009-07-12

2009-07-12

01:16	Ali_	I am learning clojure, can I ask a question here?
01:24	cmvkk	yes.
01:34	Ali_	I am receiving IllegalArgumentException when I define this function
01:34	Ali_	(defn pascal-triangle
01:34	Ali_	"Returns a lazy sequence of all the rows in pascal triangel."
01:34	Ali_	(iterate
01:34	Ali_	(fn [row]
01:34	Ali_	(concat '(1)
01:34	Ali_	(map #(reduce + %) (partition 2 1 row))
01:34	Ali_	'(1)))
01:34	Ali_	'(1 1)))
01:35	Ali_	Don't know how to create ISeq from Symbol.
01:35	Ali_	Where in this definition is it creating ISeq from symbol
01:35	cmvkk	probably partition.
01:35	Ali_	I tried this separately
01:36	Ali_	(defn p-t-row [r]
01:36	Ali_	(concat '(1)
01:36	Ali_	(map #(reduce + %) (partition 2 1 r))
01:36	Ali_	'(1)))
01:36	Ali_	this works and every time I call it I get a new row from pascal triangle
01:42	cmvkk	oh, duh. the simplist things are the easiest to overlook.
01:42	cmvkk	for pascal-triangle, you want def not defn.
01:43	cmvkk	it's expecting a function definition with an arglist, and it's choking because there isn't one...
01:43	Ali_	I will look into that. But I was looking at the code for fibs in lazy-seqs which is similar and it uses defn
01:44	Ali_	isn't it?
01:44	cmvkk	well you can use this as a function, but it at least needs an empty arglist.
01:44	cmvkk	just put [] after the docstring.
01:44	Ali_	oh, yes yes
01:44	Ali_	thanks
01:44	Ali_	I forgot about that, thanks a lot
01:53	Ali_	still not working
01:53	Ali_	I am getting wrong number of arguments to iterate now
01:53	Ali_	after I added the empty arglist or using def
01:53	Ali_	(defn pascal-triangle
01:53	Ali_	"Returns a lazy sequence of all the rows in pascal triangle."
01:53	Ali_	[]
01:53	Ali_	(iterate
01:53	Ali_	(fn [row]
01:53	Ali_	(concat '(1)
01:53	Ali_	(map #(reduce + %) (partition 2 1 row))
01:53	Ali_	'(1))
01:54	Ali_	[1])))
01:55	Ali_	sorry, it was misplaced parens
02:05	Jomyoot	Is there an example on how to structure project folders/name spaces and etc?
02:05	Jomyoot	is it similar to how I would do packages in Java?
02:05	kotarak	Jomyoot: I structure my projects like this:
02:06	kotarak	Jomyoot: toplevel build.xml, ivy stuff, README, etc.
02:06	Jomyoot	since' there is no objects in clojure.
02:06	Jomyoot	do I still need to keep that package/folder relationship?
02:06	Jomyoot	like in java?
02:06	Jomyoot	com.what.here
02:06	kotarak	Jomyoot: src subdir contains all sources (I mix .java and .clj if there is any .java...), layout below src is dictated by the namespace dir convention
02:06	Jomyoot	goes into src/com/wht/here
02:07	kotarak	Jomyoot: compiled stuff goes into classes, jars etc. in build
02:07	Jomyoot	kotarak: I use intelliJ
02:07	Jomyoot	with La Clojure
02:07	Jomyoot	Hope it's good enough
02:07	kotarak	Jomyoot: Don't know about IntelliJ. Do everything manually and work with Vim.
02:08	kotarak	But the layout proved it's usefulness.
02:08	kotarak	To your questions: namespaces follow Java conventions.
02:08	Jomyoot	Do I need to use Maven?
02:08	kotarak	No. I use eg. Ivy. But even that is optional.
02:08	Jomyoot	for many of the plugins?
02:08	kotarak	You can use make if you like.
02:09	kotarak	(ns foo.bar-baz.frobincator) must go to (considering the structure above) src/foo/bar_baz/frobnicator.clj
02:10	Jomyoot	ok
02:11	Jomyoot	I tried Scala
02:11	kotarak	Jomyoot: don't forget the - vs. _ translation.
02:12	Jomyoot	Didn't see enough Magick
02:12	Jomyoot	it's like a terse version of Java
02:12	Jomyoot	but that's it
02:12	Jomyoot	Was trying to find magick in it
02:14	Jomyoot	clj file names aren't capitalized?
02:15	kotarak	It depends.
02:15	kotarak	(ns foo.bar.Baz) must be capitalised.
02:16	kotarak	(ns foo.bar.baz) not.
02:18	Jomyoot	hmm
02:37	Jomyoot	does clojure get compiled to .class?
02:37	Jomyoot	clj --> .class?
02:37	Jomyoot	Should I expect it to?
02:37	cmvkk	if you use genclass. otherwise, when clojure is compiled, every function becomes its own class.
02:38	Jomyoot	so when i hit compile, i should be getting bunches of .class files right?
02:38	Jomyoot	so my IDE is not set up right
02:38	Jomyoot	nothing comes out
02:39	cmvkk	yeah if nothing comes out that's probably wrong.
03:46	Ali_	How does this form run inside the jvm?
03:46	Ali_	(reduce + (take 1000000000 whole-numbers)
03:46	Ali_	Does it take the first number add it, throw it, take the next, take the next and add it, ....
03:46	Ali_	Or does it realize the first billion numbers and then add all the numbers in the seq?
03:47	kotarak	Ali_: No. It realises as needed.
03:47	Ali_	the first one?
03:47	kotarak	But whole-numbers retains the head.
03:48	kotarak	The the intermediate results will stay in memory.
03:48	Ali_	how can one make whole-numbers not retain the head?
03:48	kotarak	Rewrite it like this: (reduce + (take 10000000000 (whole-numbers))), whole-numbers is a function returning a fresh sequence of all numbers.
03:49	kotarak	So instead of (def whole-numbers (iterate inc 0)) do (defn whole-numbers [] (iterate inc 0))
03:49	Ali_	thanks. let me try it.
03:50	Ali_	in this case, it takes the next number, add it, throw it and so on without keeping it in the heap?
03:50	kotarak	Yes.
03:50	Ali_	cool
03:51	kotarak	But when you make whole-numbers a constant not a function, it will hold the head of the sequence. Then the results get cached and stay in heap.
03:51	kotarak	But the function returns always a new sequence, so the intermediate results can get garbage collected.
04:21	lenst	'(1 2 3)
06:41	sayyestolife	hm
06:41	sayyestolife	I'm thinking of doing a small 2d game in Clojure. What graphic library would you guys suggest?
06:55	sayyestolife	I don't mind it being quite low level (like SDL)
06:58	sayyestolife	I guess I might aswell go with sdljava
07:40	yakov2	hm
08:08	yakov2	is there a "instanceof" in Clojure?
08:10	hiredman	,(doc instance)
08:10	clojurebot	"/;nil; "
08:10	hiredman	,(doc instance/)
08:10	clojurebot	Invalid token: instance/
08:10	hiredman	,(doc instance?)
08:10	clojurebot	"([c x]); Evaluates x and tests if it is an instance of the class c. Returns true or false"
08:10	hiredman	it is really early
08:11	hiredman	late, whichever
08:13	yakov2	thanks
08:52	Jomyoot_	how do I run .clj from command line?
08:55	Jomyoot_	how would I run .clj from java
09:00	Raynes	Jomyoot_: java -cp <path to clojure.jar>;<path to source files needed by file you want to run> clojure.main <path to source file you want to run>
09:01	Jomyoot_	does clojure.Lang.Script work anymore?
09:01	Jomyoot_	I keep finding references to clojure.Lang.Script
09:03	slaney	Jomyoot_: yes, it works
09:04	slaney	I am using it right now
09:04	hiredman	slaney: :(
09:04	slaney	heh
09:04	slaney	I am just getting started
09:04	hiredman	clojure.main
09:05	slaney	I see
09:05	hiredman	Script is old, and less liked
09:06	slaney	well, this is a 4 line shell script I wrote to either fire up the repl, or exec a file...will be trivial to change
09:10	Jomyoot_	where is the contrib place
09:11	Jomyoot_	clojure.contrib
09:11	Jomyoot_	is it at google or sourceorge?
09:11	Chousuke	it's at assembla too
09:11	Jomyoot_	most recent one where?
09:11	Chousuke	and github
09:11	Chousuke	http://www.assembla.com/spaces/clojure-contrib
09:38	Jomyoot_	Caused by: java.sql.SQLException: Value '[B@4de35d1a' can not be represented as java.sql.Timestamp
09:39	Jomyoot_	I get this using the sql contrib
09:39	Jomyoot_	Is there something i should know?
09:39	hiredman	what are you trying to do?
09:40	hiredman	anyway, it looks something is trying to turn a byte array into a sql timestamp
09:40	hiredman	(and cannot)
09:40	Jomyoot_	hmm
09:41	Jomyoot_	(with-connection db
09:41	Jomyoot_	(with-query-results rs ["select * from entries where is_hidden = 0 AND type = 'Story'"]
09:41	Jomyoot_	(dorun (map #(println (:id %)) rs))))
09:41	Jomyoot_	Seems simple enough
09:41	Jomyoot_	I do not have a byte array in that table
09:42	Jomyoot_	i do have quite a lot of timestamps in there
09:51	Jomyoot_	am I supposed to use Java's Hashtable?
09:51	Jomyoot_	can't find something provided by clojrue
09:51	hiredman	uh
09:51	hiredman	really?
09:52	hiredman	http://clojure.org/data_structures
09:53	Raynes	He desperately needs a copy of Programming Clojure. :)
10:05	Jomyoot_	waiting for mine to arrive
10:05	Jomyoot_	hhave the PDF version
10:05	Jomyoot_	waiting for paper one
10:15	Raynes	Since when does Clojure have a while loop? O_o
10:17	Chousuke	since: Wed Nov 26 23:13:57 2008
10:18	Raynes	Chousuke: I didn't get the memo ;)
10:18	Raynes	And, way to be accurate!
10:18	Chousuke	that's from git log
10:19	Raynes	I figured that. :)
10:19	Chousuke	while has considerably less use in Clojure than in other languages, though
10:19	Chousuke	but you could have a (while @running ...) :)
10:27	Jomyoot_	(with-connection db
10:27	Jomyoot_	(with-query-results rs ["SELECT id, name FROM tags WHERE SITE_ID = 1"]
10:27	Jomyoot_	(dorun (map #(dosync (assoc tags (:id %) (:name %))) rs))))
10:27	Jomyoot_	What's wrong with my code
10:27	Jomyoot_	I do (def tags (hash-map)) earlier
10:28	Jomyoot_	I wish there are more examples
10:30	Raynes	Chousuke: Good for infinite loops I imagine.
10:45	Jomyoot_	omg i got it
10:45	Jomyoot_	(ref) and (deref) and (dosync)
10:51	maacl	Lau_of_DK: hejsa
10:52	Lau_of_DK	maacl: Hejsa :)
11:01	maacl	Lau_of_DK: I cannot figure out how to generalize this recursive call to work for s1 being anything else than a string: (str (traceback-lcs m s1 s2 (- i 1) (- j 1)) (nth s1 (- i 1))) - any ideas? I would like for it to return a collection of the same type as s1.
11:02	Lau_of_DK	maacl I'd love to, but I gotta run, if you havent worked it out by tomorrow when I get back - we can have a look at it
11:37	StartsWithK	hi
11:38	StartsWithK	is there a standard practice for using :arglists metadata to fix args for documentation on fns and macros?
11:39	StartsWithK	how do i write :arglists '([name #{deps*}]), it that ok for sets?
11:41	Jomyoot_	simple question: how do apply (str) to ("a" "b" "c")
11:41	Jomyoot_	to combine the result
11:41	StartsWithK	how do i indicate that #{} is optional to, but can be empty if specified?
11:41	StartsWithK	Jomyoot_: (apply str (list "a" "b" "c"))
11:42	Jomyoot_	thanks
11:45	StartsWithK	so is #^{:arglists '([name #{task-deps}? [property-deps]? [property-bindings*]? & body])} ok?
11:46	StartsWithK	or & in front of body is not needed, i see that defn dosn't have it
11:47	Jomyoot_	last question: how to (apply str (list "a" "b" "c")) but seperate each "a" "b" "c" by a " " space
11:49	StartsWithK	Jomyoot_: (apply str (interpose " " ["a" "b"]))
11:51	Jomyoot_	well Clojure is awesome
11:51	Jomyoot_	Lisp is awesome actually
11:51	Jomyoot_	my code is so short now
11:51	StartsWithK	:)
11:52	Jomyoot_	wonder why Lisp was not that popular
11:52	Jomyoot_	recently
11:52	Jomyoot_	it wasn't popular recently
11:52	Jomyoot_	probably was like long itme ago
11:54	justin`	anyone know how I might reset a "deck" to its original state? It's a var pointing to a sequence
11:55	justin`	in other words I'm trying to set "deck" to (shuffle (make-deck)) but I'm having trouble figuring out how to do this in a transaction
11:56	Chouser	if you plan to change a reference
11:56	Chouser	(like a var)
11:56	justin`	yup
11:57	Chouser	in the normal course of a program, then a var is probably not the right choice
11:57	Chouser	unless each change is local only to one thread
11:57	StartsWithK	justin`: maybe (binding [deck (.getRoot deck)] ...)
11:57	justin`	hmm
11:59	Chouser	that binding is right if you want the change to be in effect only within the ... part
11:59	StartsWithK	(def deck 3)
11:59	StartsWithK	(binding [deck 4] (println deck) (binding [deck (.getRoot #'deck)] (println deck)))
11:59	StartsWithK	prints 4\n3
11:59	Chouser	otherwise a ref or atom may work better for you.
11:59	StartsWithK	but that may not be what you realy want
12:00	justin`	yeah I'll try with a ref
12:10	ceninan	how do I stop a macro expansion from namespace-qualifying?
12:12	StartsWithK	ceninan: (defmacro x [] (list 'println "hi")) no namespace-qualifing, (defmacro x [] `(println "x")) namespace qualified for println
12:13	ceninan	StartsWithK: thanks!
12:48	StartsWithK	http://paste.pocoo.org/show/128073/ i tried to fix arglists, but new declaration is not shown with doc
12:48	StartsWithK	am i doing something wrong?
12:51	cmvkk	seems like arglists is probably auto generated by defmacro, and it's overwriting your declaration.
12:52	Chousuke	StartsWithK: try just putting the metadata map as a regular map after the name of the macro
12:52	Chousuke	(doc defmacro)
12:52	clojurebot	"([name doc-string? attr-map? [params] body] [name doc-string? attr-map? ([params] body) + attr-map?]); Like defn, but the resulting function name is declared as a macro and will be used as a macro by the compiler when it is called."
12:54	StartsWithK	Chousuke: that worked, thanks
12:56	StartsWithK	cmvkk: yes, strange as it uses defn to declare a macro with straight (defn name args) call
13:27	larryjoe	I have a question regarding eval and local bindings... using clojure.contrib.macros/const, (let [x 1] (const x)) gives an UnsupportedOperationException... how does eval know about the external lexical bindings, and why does it not use the dynamic bindings (BTW I like that it exceptions)
13:53	bradford	,(let [foo 5] (str (:name (meta #'foo))))
13:53	clojurebot	java.lang.Exception: Unable to resolve var: foo in this context
13:54	bradford	k, that doesnt work...in my repl i already bound foo beforehand :-)
13:54	bradford	i'm trying to get the string name corresponding to a vars symbol
13:55	bradford	the other problem is that i need to do it for a collection.
13:56	bradford	obviously i can not do this (for [x something] (str (:name (meta #'x))))
14:31	IKelvin	hi there,
14:31	IKelvin	i'm trying to assign a public class variable.
14:31	IKelvin	public class Foo {
14:31	IKelvin	public int a;
14:31	IKelvin	}
14:31	IKelvin	void function(){
14:31	IKelvin	Foo foo = new Foo();
14:31	IKelvin	foo.a = 5; // how to write this in clojure?
14:31	IKelvin	}
14:31	IKelvin	Clojure:
14:31	IKelvin	(foo (Foo.))
14:31	IKelvin	(.a foo 5) ; obviously doesn't work
14:31	Chouser	(set! (.a foo) 5) ; I think
14:31	hiredman	,(doc set!)
14:31	clojurebot	"/;nil; "
14:31	hiredman	#@$@#
14:34	IKelvin	it worked! Thanks!
14:38	Chouser	that's an instance member, by the way
14:39	Chouser	I guess "class" may be right too, but I thought you meant static at first
14:40	IKelvin	i see
15:39	schaefer_	i have a smalltalk background and i'm a big fan of named arguments. i like the defnk macro available in contrib and i've been thinking about its performance: it is at least one object allocation followed by several "puts" to a map for making the call and then several "gets" as the function begins executing
15:39	schaefer_	if the compiler (or reader in clojure's case) is smart enough, all that overhead could be eliminated and turned into a direct stack based call
15:40	schaefer_	my question is: is there a way (in user space) to smarten up clojure's reader to avoid all that overhead? conceptually, i can see how to write a macro to handle the function side, but i don't know how to do it on the caller side
15:41	maacl_	Is there a function that works like empty but also works for strings?
15:42	hiredman	~javadoc java.lang.String
15:42	maacl_	i.e works both for collections and strings at the same time ?
15:44	hiredman	why would want that?
15:44	hiredman	presumably you want an empty of something so you can build onto it, and none of the datastructure building functions work on string either
15:45	maacl_	because I need to return a collection or string depending on what was passed into the function
15:46	hiredman	sounds like you want defmulti
15:47	hiredman	d
15:49	maacl_	yeah, was trying to find a clever way around it
15:49	hiredman	why?
15:49	maacl_	that is clever as in "clever"
15:49	hiredman	defmulti is nice
15:50	maacl_	sure, but thought this might be more elegant
15:50	hiredman	the set of operations on String and on Collections are different, so you need two code paths anyway
15:51	maacl_	well, conj got me part of the way :-)
15:51	hiredman	erm
15:51	hiredman	conj does not work on strings
15:52	maacl_	no but on characters which I build the string from
15:53	hiredman	so why do you need an empty string then? if you are operating on a list?
15:54	maacl_	well it turns out I don't because it was a dead end
15:56	maacl_	looks like defmulti is the way to go - thanks t´for the tip
16:01	Chouser	schaefer_: I think you could do what you want for simple fn calls just using macros
16:02	schaefer__	oh? how do you mean?
16:02	Chouser	schaefer_: that is, write (defmacro my-defnk ...) such that (my-defnk foo ...) expands to (defmacro foo ...)
16:04	Chouser	then (foo :a 1 :b 2) would call that generated macro and would figure out at compile time the right way to call the positional args
16:04	schaefer__	ah... i think i follow you
16:05	Chouser	I guess (my-defnk foo ...) might actually expand to both (defn foo* ...) and (defmacro foo ...)
16:05	schaefer__	yes, that makes sense
16:05	Chouser	so that a call (foo :a 1 :c 3) could expand to (foo* 1 nil 3) or whatever.
16:06	Chouser	the problem would be you couldn't pass foo to high-order fns
16:06	Chouser	(map foo [1 2 3]) wouldn't work.
16:07	schaefer__	why not? would that just be seen as one 'token' to the macro?
16:08	Chouser	map isn't a macro -- it's first args needs to be an actual fn, not a macro
16:08	schaefer__	oh, sorry, i misunderstood your example. i see the problem now
16:09	Chouser	not even sure how you'd want that to look (even if there were no restrictions imposed by Clojure)
16:09	Chouser	(map foo :a [1 2 3] :b [4 5 6]) ?
16:09	Chouser	(map foo [{:a 1 :b 4} {:a 2 :b 5}]) ?
16:09	schaefer__	well, you could have an arbitrary rule that says use positional args when named args aren't available
16:10	Chouser	hm... actually, in that case you might be able to abuse the :inline metadata
16:10	schaefer__	or, you could disallow (map foo [1 2 3]) in favor of declaring a new function: (map (fn [x] (foo :a x)) [1 2 3])
16:11	Chouser	ok. that would be fine too using the multiple macro idea, I think.
16:11	schaefer__	yes, i think so
16:11	Chouser	I'm very intruiged by named args, so let me know if you pursue this.
16:11	clojurebot	this is not a bug
16:12	schaefer__	instead of the macro approach, is there a way to influence the reader to teach it new tricks? or is that what the docs mean by "the symbole table isn't available in user space" ?
16:12	schaefer__	(or something like that)
16:13	Chouser	right, no adjusting the reader without actually patching the clojure code itself
16:13	schaefer__	i'm going to play around with this. i see it mainly as a way to dig into macros and understand the innards of clojure
16:13	Chouser	which is an option, of course, but reduces your target market a bit.
16:14	schaefer__	exactly. whatever i come up with, i want to be within the mainstream
16:20	Chouser	what I'd like to experiment with at some point is named args that somehow default to picking up same-named locals from the calling scope
16:21	schaefer__	interesting, but i can imagine it being very confusing to someone reading the code
16:21	schaefer__	in java, i've wished for something similar, particularly for constructors where there is a lot of:
16:22	schaefer__	public Constructor(Object a, Object b) {this.a=a; this.b=b;)
16:23	hiredman	Chouser: sounds like binding
16:25	Chouser	I was thinking something more like (defnk foo [a b c] ...) defining a fn that takes named args a, b and c. You could call this using (foo :a a :b b :c c), but if the names of your locals actually match the arg names like that, there'd be some kind of shortcut
16:25	Chouser	not sure what it would look like. Maybe (foo ~a ~b ~c) or something :-/
16:26	Chouser	because of course you'd want to still be able to do (foo ~a ~b :c (+ 4 5)) or whatever as needed
16:26	Chouser	I have no idea if this would end up being useful or not, but it seems to me like it might be.
16:26	schaefer__	yes. i was afraid you were talking about (let [a 1 b 2 c3] (foo))
16:26	schaefer__	that would be a little too weird, imo
16:27	Chouser	oh, no. That's too open-ended for me.
16:27	kotarak	too much context to remember...
16:27	schaefer__	exactly my thinking
16:27	Chouser	yes
16:27	Chouser	too much
16:28	Chouser	in that case an arg could be "given" at a top level, not mentioned in several calls deeper, and used at a low level.
16:28	Chouser	well, like 'binding', but even less explicit. Too scary.
16:28	schaefer__	i do like the notion of (foo ~a ~b :c (+ 4 5)) primarily because it encourages common variable names across code. one of the things i miss in clojure (god help me for saying so) is the self-documenting that goes along with strong typing
16:29	kotarak	naa.. I found clear names just as good..
16:29	Chouser	schaefer__: well, if you get the compile-time named arg expansion working, we can try tacking ~a on top.
16:30	hiredman	:/
16:30	schaefer__	kotorak: agreed. i think chouser's idea helps to encourage common names across code code and, assuming you start with good names...
16:30	sgtarr_	anyone here using Clojure in enterprise settings?
16:30	kotarak	sgtarr_: me, as some kind of secret weapon
16:31	schaefer__	chouser: i'm going to play around with it this week. i'll post whatever i come up with in the forum.
16:31	sgtarr_	kotarak: sounds good
16:31	Chouser	schaefer__: cool
16:43	sgtarr_	kotarak: are you making them believe it's actual java code?
16:44	sgtarr_	it all compiles into java bytecode anyway :)
16:44	kotarak	sgtarr_: no, but it's not really professional. :] Some local, home-grown utility. My boss just knows, that it will solve our problems and run where ever Java 1.5 is installed...
16:47	sgtarr_	I would like to take Clojure to an enterprise setting
16:47	sgtarr_	I work for a medical tech company and we use various technologies; .NET/C#, Java, C, Python, depending on the product
16:50	kotarak	sgtarr_: sorry, can't help you on that, I'm not a programmer, more an "engineer"...
17:22	pokey19	Hello
17:22	pokey19	how do I write Clojure code in an external file and then have Clojure interpret it?
17:26	technomancy	pokey19: spit and load-file
17:53	lisppaste8	ceninan pasted "Next time I will learn-_before_-doing..." at http://paste.lisp.org/display/83479
17:54	ceninan	shudder
17:54	ceninan	learning-by-learning is a better idea
18:44	syamajala	is there anything like html-template for clojure?
18:45	syamajala	i looked at enlive, but its not quite what i want
18:50	Chousuke	clj-html or compojure.html perhaps?
19:33	mattrepl	added tests for clojure-cassandra, but when running 'run-tests nothing is printed out
19:33	mattrepl	anything obviously wrong? http://github.com/mattrepl/clojure-cassandra/blob/812fb1339ce170a468c8578c274f1aec10c9c6a8/src/cassandra/test.clj
19:34	mattrepl	I just use the test namespace and clojure.test, then call run-tests with the test namespace as the only arg
19:47	mattrepl	love it... changed my init and had forgot to add output redirection back in
22:59	technomancy	wow, this is pretty slick: http://ideolalia.com/rendering-textures-in-clojure-0
22:59	technomancy	(using the penumbra openGL library)