#clojure – 2009-07-13

2009-07-13

10:11	Georges`	Hello
10:12	cgrand	Hi Georges!
10:13	Georges`	newbie question...
10:14	Raynes	Hello there.
10:15	Georges`	how do you fill a map in a map call?
10:15	Georges`	(let [map {}]
10:16	Georges`	(map (fn ...) XXX my-list))
10:16	Georges`	(let [my-map {}] (map (fn ...) XXX my-list))
10:16	kotarak	The function "map" is not a "map". Try: (into {} (map (fn ...) my-list)
10:17	kotarak	fn should return key value pairs.
10:17	Chouser	where the (fn ...) returns a vector of [key val]
10:17	Raynes	map applies a function to every element of a sequence and returns the result.
10:19	kotarak	,(into {} (map (fn [k v] (vector k v)) [:a :b :c] (iterate inc 0)))
10:19	clojurebot	{:c 2, :b 1, :a 0}
10:19	Georges`	yeah, still haven't adjusted to that functional style
10:20	Georges`	OK, I'll try.
10:20	Georges`	Thanks
10:20	Raynes	There is also the hash-map function.
10:21	Raynes	,(apply hash-map [:key "value" :key2 "value2"])
10:21	clojurebot	{:key "value", :key2 "value2"}
10:21	Chouser	and zipmap!
10:21	Chouser	,(zipmap [:k1 :k2] [:v1 :v2])
10:21	clojurebot	{:k2 :v2, :k1 :v1}
10:22	Raynes	Chouser: Oh, you're good.
10:24	Chouser	and merge!
10:24	Chouser	,(apply merge {} (map (fn [x] {x (* x 2)}) (range 5)))
10:24	clojurebot	{4 8, 3 6, 2 4, 1 2, 0 0}
10:25	Chouser	the only "related functions, change a map' items left are assoc, dissoc, and select-keys
10:25	Chouser	hmm...
10:25	Georges`	What if I need to insert two values in the map for each iteration ?
10:26	Chouser	Georges`: merge can do that
10:26	kotarak	,(reduce (fn [m kv] (apply assoc m kv)) {} (partition 2 [:a 1 :b 2 :c 3])
10:26	clojurebot	EOF while reading
10:26	kotarak	,(reduce (fn [m kv] (apply assoc m kv)) {} (partition 2 [:a 1 :b 2 3]))
10:26	clojurebot	{:b 2, :a 1}
10:26	Chouser	there's reduce+assoc
10:26	kotarak	-.- smiley....
10:27	kotarak	,(assoc {} :a 1 :b 2)
10:27	yason	Good stuff these zipmap, (into {} ...). I've relied on (apply hash-map ...) before but I absolutely hate to flatten a list of tuples into a list concatenated together
10:27	clojurebot	{:b 2, :a 1}
10:27	Chouser	I can't think of how to use dissoc or select-keys to build a map
10:28	Chouser	I guess that's good. :-)
10:28	kotarak	Chouser: well, maybe you have a default map and dissoc stuff to get the result? But that would be pretty esoteric, no?
10:29	Chouser	sure.
10:29	Chouser	that stretches the definition of "build" sufficiently I think. :-)
10:30	kotarak	hehe
10:30	yason	Chouser: Like sculptors work: start with everything and remove what isn't part of the piece :)
10:31	Georges`	Chouser: merge is nice
10:34	Chouser	,(into {} (filter #(some #{\?} (name (% 0))) (ns-publics 'clojure.core)))
10:34	clojurebot	{keyword? #'clojure.core/keyword?, instance? #'clojure.core/instance?, sequential? #'clojure.core/sequential?, fn? #'clojure.core/fn?, nil? #'clojure.core/nil?, string? #'clojure.core/string?, sorted? #'clojure.core/sorted?, false? #'clojure.core/false?, true? #'clojure.core/true?, odd? #'clojure.core/odd?, symbol? #'clojure.core/symbol?, number? #'clojure.core/number?, integer? #'clojure.core/integer?, reversible? #'cloj
10:34	Chouser	oh, whoops. still no dissoc
10:34	Raynes	You're just showing off now.
10:34	Raynes	:)
10:35	Chouser	and what's more, failing at it.
11:44	hiredman	http://twitter.com/ajlopez/status/2598594041
11:46	hiredman	http://code.google.com/p/ajlisp/updates/list
11:46	Chouser	that's number 3, I think.
11:46	danlarkin	sure, why not another half-complete implementation :)
11:47	hiredman	and only an interpreter
11:47	Chouser	3rd clojure-like in C#, I mean.
11:48	hiredman	and significantly different, I imagine
11:49	Chouser	He's got better test coverage (percent-wise) than Clojure.
11:52	hiredman	:P
11:52	hiredman	my concern is brand dilution
11:53	hiredman	what if he does add reader macros
11:54	Chouser	unless "Clojure" is trademarked (I assume it's not) I don't think there's anything rhickey can do via the law. Though a polite request to change the name might work
11:54	hiredman	in any case a polite request is the best place to begin
11:54	Chouser	indeed
11:55	Chouser	well, evaluation of whether such a request is needed should be first, but I think we've accomplished that.
11:55	cemerick	this happened once before (coping with the use of the clojure name)
11:55	Chouser	what he's got there may be clojure-inspired, but that's about it.
11:56	Chouser	cemerick: did it? there was a non-clojure-named C# thing, but there were potential copyright issues there which don't seem to apply in this case
11:56	Chouser	cemerick: or are you talking about something else?
11:56	cemerick	hrm, I thought there was a C# "port" (more like a complete clone of the svn at the time) that had a name that was some derivative of clojure
11:57	cemerick	I guess the use of the code was more of a concern than the name in that case
12:10	cemerick	yes?
12:11	Raynes	I don't need anything. >_>
12:13	ozzilee	What am I doing wrong? (binding [out java.io.FileWriter "foo"] (println "bar"))
12:13	ozzilee	Does that not work from the Repl?
12:15	Chouser	(binding [out (java.io.FileWriter. "foo")] (println "bar"))
12:15	Raynes	Doesn't work either.
12:15	Raynes	Wait, no. Haha.
12:15	Raynes	I failed.
12:15	Raynes	I forgot the period on the end of FileWriter. :\
12:16	ozzilee	Chouser: I'm sorry, that's what I have. Still doesn't work. Just prints out to the Repl.
12:21	ozzilee	The file is created, but nothing gets written to it.
12:21	StartsWithK	ozzilee: works for me
12:22	StartsWithK	v1.0.0?
12:23	hiredman	ozzilee: close or flush the file
12:23	hiredman	(.flush out)
12:23	hiredman	(.close out)
12:25	ozzilee	Must be a bug in the version of clojure I'm using, works with the latest from SVN.
12:27	ozzilee	How does contrib mesh with clojure releases? Should I just contrib trunk along with clojure 1.0?
12:27	hiredman	there is a contrib branch for 1.0 compat
12:28	ozzilee	hiredman: Ah, okay. Thanks.
12:29	cemerick	(binding [out (java.io.FileWriter. "foo")] (println "bar")) works for me on v1.0.0 shrug
12:31	hiredman	and here on 1.1 alpha
12:35	ozzilee	I probably have an old version with this project. No big deal.
12:36	cemerick	ozzilee: what is the value of clojure-version?
12:37	ozzilee	Hrm, it's 1.1.0 alpha.
12:38	cemerick	that's interesting.
12:40	ozzilee	The clojure .zip file is a bastard, btw. Unzips all over the working directory.
12:40	technomancy	ozzilee: still? that was like my first bug report for Clojure back in November. =(
12:42	Raynes	My first bug report was the read-line bug. :D It was fixed long ago.
12:43	technomancy	well unfortunately the zip file isn't generated by code afaict, so I couldn't submit a patch. =\
12:47	technomancy	,(stream? (java.io.FileInputStream. "/etc/hosts"))
12:47	clojurebot	java.security.AccessControlException: access denied (java.io.FilePermission /etc/hosts read)
12:47	technomancy	bugger that
12:47	technomancy	anyway, that returns false for me
12:47	technomancy	I take it the stream? function doesn't do what it sounds like it does?
12:48	Chousuke	Stream is a clojure class.
12:48	technomancy	oh, I thought that was from a branch that never got merged in
12:48	Chousuke	There is some stream stuff in the source.
12:48	Chousuke	I don't know what it's for.
12:48	Chousuke	:P
12:48	technomancy	gotcha. good to know.
12:49	technomancy	what's a good superclass to check for when I'm looking for Java streams?
12:49	Chousuke	I don't think there is any :/
12:50	Chousuke	at least in java.io
12:50	Chousuke	dunno about .nio
12:50	technomancy	I guess I'm specifically looking for an java.io.InputStream here
12:52	technomancy	,(.getSuperClass java.io.InputStream)
12:52	clojurebot	java.lang.IllegalArgumentException: No matching field found: getSuperClass for class java.lang.Class
12:53	Georges`	symbol -> keyword = (keyword (name 'symbol)) ? Or is there simpler ?
12:54	Chousuke	that might lose the namespace
12:54	Chousuke	though that may be what you want :)
12:54	ozzilee	Okay, binding out works for me on git head. Must have been a bug or something in the revision I was using.
12:54	Georges`	oh right, maybe I'll just directly use keywords...
12:55	Chousuke	or (keyword (namespace sym) (name sym))
12:55	hiredman	(ancestors java.io.InputStream)
12:55	hiredman	,(ancestors java.io.InputStream)
12:55	clojurebot	#{java.io.Closeable java.lang.Object}
12:56	hiredman	heh
12:56	hiredman	Closeable
12:58	technomancy	hiredman: aha; thanks.
13:07	hiredman	,(map #(.getName %) (.getMethods java.io.Closeable))
13:07	clojurebot	("close")
13:09	Chousuke	Oniichar: heh
13:09	Chousuke	oops.
13:10	Pip	Cool, so many folks : )
13:10	Chousuke	that still works, minus the nickname :)
13:12	Georges`	Do you often use keywords instead of symbols in your data ?
13:13	Chousuke	more often than symbols I think :/
13:14	Pip	So basically, Clojure is lisp + java ?
13:14	Chousuke	I think that's an oversimplification. :)
13:14	Georges`	Chousuke: it's true that this (:keyword map) is quite practical.
13:14	Chousuke	Georges`: (map 'symbol) works too though. :)
13:14	technomancy	Georges`: symbols are used more for writing macros than anything else. if you just need a name, use a keyword
13:16	Chousuke	Pip: Clojure is a lisp dialect, but it's quite different from both CL and Scheme.
13:16	Pip	Why ?
13:17	Georges`	technomancy: OK
13:17	Pip	Why do we need it since there are so many lisp dialects ?
13:18	cemerick	Pip: http://clojure.org/rationale
13:20	hiredman	clojurebot: why?
13:20	clojurebot	why not?
13:20	Pip	How to pronounce the name ?
13:20	hiredman	clojurebot: literal [?] why
13:20	clojurebot	1
13:20	Pip	clojurebot, Hi
13:21	Hun	Pip: there are about O(n) lisp dialects, for n being the number of all lispers who ever lived
13:21	hiredman	clojurebot: why is <reply>http://clojure.org/rationale
13:21	clojurebot	Ack. Ack.
13:21	cemerick	Pip: just like "closure". The 'j' doesn't affect the pronunciation.
13:21	Georges`	(class [x])
13:21	clojurebot	x is w
13:22	Pip	the j means .... jvm ?
13:23	cemerick	rhickey: watchers are nifty; what would your opinion be of a variety that were executed within the scope of the transaction setting the ref in question, though? (e.g. on every LT.doSet)
13:24	cemerick	Pip: I presume so, although I honestly don't remember reading that stated definitively.
13:25	Pip	thanks, must be easy to learn right ?
13:25	hiredman	I dunno abouhttp://clojure.org/rationale
13:25	hiredman	er
13:25	hiredman	I dunno about easy, seems on par with everything else
13:26	hiredman	just depends on who is learning
13:26	rhickey	cemerick: sounds like in-transaction side effects
13:28	cemerick	rhickey: on the contrary, none of the watchers I'm contemplating (or watcher-like things we already use) are side-effecting. It's just that there are watchers whose application should be included within the transaction that touches particular refs, which isn't possible given core's current watcher impl.
13:29	rhickey	cemerick: what do they do?
13:36	cemerick	rhickey: various things, but the fundamental mechanism is a cells impl where validation constraints can trigger (directed) backtracking. (Maybe) obviously, you want all of the propagated transformations to take place in a single transaction.
13:36	rhickey	so the watch triggers other ref mods?
13:36	Chouser	"I already have a bunch of
13:36	Chouser	files containing data structures written with print-dup"
13:36	Chouser	ouch
13:37	cemerick	rhickey: yes
13:38	cemerick	Chouser: heh, we're heading down that road as I type
13:38	rhickey	cemerick: seems easy to misuse
13:38	rhickey	cemerick: I understand the use case though
13:39	cemerick	rhickey: with great power, and all that. My fallback (if you aren't swayed in this case) is to have parallel ref-set, commute, and alter fns that synchronously trigger updates via 'neighbor' refs held in the just-altered ref's metadata.
13:39	rhickey	would synced watches as a property of the ref suffice?
13:40	rhickey	vs a second variety of watches
13:40	rhickey	would preclude in-and-outside of transaction watches on same ref
13:41	cemerick	rhickey: not entirely sure I follow -- do you mean the watches would only be settable at ref-creation-time?
13:41	rhickey	cemerick: no, that calling them in-transaction would be a ref property
13:42	cemerick	oh, I see.
13:42	rhickey	(def r (ref 42 :sync-watches true))
13:43	drewr	Chouser: I've been ambivalent myself about storing data that way. :-/
13:43	rhickey	I guess it could be a property of add-watch, for refs
13:43	cemerick	Seems fine to me, esp. since one could just as easily send off to an agent if you really wanted to break out of a transaction to get hybrid behaviour (not sure why one would want to do that, but...)
13:45	cemerick	rhickey: yeah, I'd prefer it to be a property of add-watch, just to ensure maximum flexibility.
13:46	cemerick	or, it could be part of the metadata of the fn provided to add-watch. Lots of options.
13:46	cemerick	Or, a configuration property of sync (which would just rope in a subclass of LT with an override of doSet that calls super.doSet(), and then fires off the notifications).
13:46	rhickey	definitely not property of sync
13:47	cemerick	aagh, that "transaction-flags => TBD" line in the doc of sync is like a blank piece of paper for me ;-)
13:48	rhickey	cemerick: blank paper, but not for scribbling :)
13:48	cemerick	(sync {:do-what-I-want true} ...)
13:48	rhickey	timeouts, retry limits, other true properties of the transaction
13:48	rhickey	conflict resolution policy
13:49	Chouser	(sync {:i-win-conflicts true} ...)
13:49	Chouser	cemerick: you're right, this is fun
13:51	rhickey	I'd look at a rev for (add-watch aref k f :sync true), but it means a second watch list, and more complexity in Ref...
13:51	technomancy	the girl next to me at the coffee shop has Eclipse open and is learning about for loops for a CS course.
13:52	cemerick	rhickey: you mean ARef?
13:52	technomancy	I feel like I should do something... save her from a life of pain.
13:52	rhickey	Chouser: :i-win-conflicts true is not far-fetched
13:52	rhickey	cemerick: well, it doesn't make sense for the other refs, so would have to move down into Ref
13:54	Chouser	sending to an agent from a synchronous ref watcher wouldn't actually break out of the transaction, right? the send would be help until commit.
13:54	cemerick	right, that makes sense
13:54	rhickey	Chouser: right
13:55	rhickey	true sync sends are not possible
13:55	rhickey	similarly makes so sense to do sync watch in Atom on failed CAS
13:55	Chouser	so a sync watcher is not a more general case, it's just alternate case
13:56	Chouser	bleh. :-(
13:56	hiredman	technomancy: "you should use a while loop and trampolined Callables for that"
13:56	Chouser	oh...
13:56	technomancy	hiredman: I'll tell her to talk to you.
13:56	Chouser	these sync ref watchers might retry. hadn't thought of that.
13:57	slurms	I was noticing that, I don't think watchers are covered in Stu's book
13:57	rhickey	Chouser: yeah, it's really only a Ref thing, and then only for use as directed - to update other refs in same transaction. Will likely be used to create all kinds of bugs, side effects, linked DB transactions etc. cemerick has volunteered to support :)
13:57	Chouser	hehe
13:57	hiredman	I've been trying to get people in #java asking homework questions to use some kind of trampolined callable thing as a solution
13:58	Chouser	slurms: they're all still marked "experimental"
13:58	cemerick	rhickey: I promise to instigate at least half of those bugs, side effects, and linked DB transactions! :-P
13:59	technomancy	hiredman: sounds like fun.
13:59	rhickey	we should be saying watches here, not watchers
13:59	slurms	Chouser: k. I'm a novice, but I can already see where they'd come in useful in things I make. Is there any documentation on them out there?
13:59	rhickey	,(doc add-watch)
13:59	clojurebot	"([reference key fn]); Experimental. Adds a watch function to an agent/atom/var/ref reference. The watch fn must be a fn of 4 args: a key, the reference, its old-state, its new-state. Whenever the reference's state might have been changed, any registered watches will have their functions called. The watch fn will be called synchronously, on the agent's thread if an agent, before any pending sends if agent or ref. Note tha
13:59	hiredman	you'd think, but no takers so far
14:00	cemerick	rhickey: is 'watchers' a loaded term otherwise? You seem to have been very careful to say 'watches' in the doc.
14:00	slurms	true
14:00	rhickey	cemerick: there are still agent-based watchers, built on watches
14:00	rhickey	,(doc add-watcher)
14:00	clojurebot	"([reference send-type watcher-agent action-fn]); Experimental. Adds a watcher to an agent/atom/var/ref reference. The watcher must be an Agent, and the action a function of the agent's state and one additional arg, the reference. Whenever the reference's state changes, any registered watchers will have their actions sent. send-type must be one of :send or :send-off. The actions will be sent after the reference's state is
14:01	cemerick	ah-ha
14:08	Chouser	so I mentioned low-hanging fruit on the clojure-in-clojure effort and have been completely overwhelmed by the flood of offers to help that haven't come rolling in. :-P
14:09	Chousuke	:)
14:10	hiredman	eh?
14:10	drewr	Chouser: so far all I've contributed to the effort is posting your article on Hacker News :-)
14:10	drewr	it's a start
14:11	hiredman	looking at the article, I did not see any low hanging fruit mentioned, just "we need new-new"
14:11	technomancy	Chouser: you mean porting the reader?
14:13	Chouser	technomancy: yeah
14:13	clojurebot	technomancy is to blame for all failures
14:13	Chousuke	:P
14:13	Chouser	drewr: yeah, it got up to #1 for a few minutes. That was fun. :-)
14:13	Chouser	drewr: thanks!
14:14	technomancy	Chouser: any low-hanging fruit that doesn't involve reading Java code? =)
14:14	Chouser	heh
14:15	Chouser	technomancy: maybe you can recreate it from the docs, unit tests, and your own knowledge of how it works.
14:15	Chouser	might end up with a better design than reading the Java code anyway, who knows?
14:16	technomancy	Chouser: if you saw the scheme parser I wrote you wouldn't say that. =)
15:59	hiredman	clojurebot has 1337 bookmarks on delicious
16:19	technomancy	OK, so I've got a macro that needs to refer to a static field inside a class I've imported.
16:20	technomancy	it looks like if I use the macro in a namespace in which that class isn't imported, it blows up
16:21	technomancy	I guess I can def the field to a var in the macro's class
16:21	Chouser	I don't think you should have to do that
16:22	Chouser	hm.
16:23	Chouser	try the old syntax (. ClassName staticName)
16:23	technomancy	Chouser: thanks! that did the trick.
16:23	technomancy	is that a bug or something?
16:23	Chouser	not sure yet
16:24	Chouser	feels that way though, doesn't it.
16:24	technomancy	the / syntax is preferable because it doesn't push me over 80 columns. =)
16:24	Chouser	yes. and for other reasons as well. :-)
16:24	technomancy	but . works for now.
16:25	Chouser	,(macroexpand `(Integer/x))
16:25	clojurebot	(. Integer x)
16:25	Chouser	,(macroexpand `(. Integer x))
16:25	clojurebot	(. java.lang.Integer sandbox/x)
16:26	technomancy	well then.
16:40	Chouser	I don't see how that can be desired, nor any obvious reason why it would be impossible to treat those the same.
16:57	Chouser	hm, the class name in (. Integer x) is expanded at syntax-quote time
16:57	Chouser	as it is for (Integer.) as well
16:58	Chouser	,`(Integer.)
16:58	clojurebot	(java.lang.Integer.)
16:59	Chouser	but not so for (Integer/x) since it might name a namespace, I suppose, and not a class
17:00	technomancy	that makes sense; there's some ambiguity there.
17:04	rzoom	looking at add-watcher it says that it is "Experimental", does that label mean?
17:04	rzoom	it may fail? syntax may change?
17:04	Chouser	rzoom: that mostly has to do with the API going forward, I think.
17:05	rhickey	rzoom: add-watcher might go away, as it is no longer primary, being built on add-watch. add-watch is not really experimental anymore. Both work just fine.
17:05	rzoom	so, if add-watcher goes away, I should try to refactor a bit to use add-watch?
17:06	rhickey	rzoom: if add-watcher goes away you can copy its current implementation into your app.
17:06	rhickey	its just a watch fn that sends to an agent
17:11	rzoom	so, (add-watcher A :send B f) is roughly: (add-watch A :my_key (send B f))
17:11	rzoom	though the f's have to take different args
17:12	rzoom	A is the watched agent and B is the watching agent
17:14	rhickey	rzoom: sort of - #(send B f A)
17:15	rhickey	plus some 'did something change?' logic - see core.clj
17:16	rzoom	of course, forgot the # there for the send. thanks.
17:20	Chouser	rhickey: so would it be acceptible for Integer/x to become java.lang.Integer/x at syntaxQuote time
17:21	Chouser	?
17:22	rhickey	Chouser: yes, I thought we did that already?
17:22	Chouser	nope -- the other modern forms do, but not static fields or static methods
17:22	Chouser	,`(Integer/x)
17:22	clojurebot	(Integer/x)
17:22	Chouser	,`(Integer.)
17:22	clojurebot	(java.lang.Integer.)
17:23	Chouser	hm. I guess that's it.
17:23	rhickey	I guess the reason why not is it is not clear that Foo in Foo/x is supposed to be a class or a ns name
17:23	Chouser	right
17:24	Chouser	but an exploratory resolveSymbol should give good results I think
17:24	rhickey	still, if Foo resolves to com.bar.Foo class then that is what syntax quote should do
17:25	rhickey	but must have no exception catching otherwise
17:26	Chouser	as in Foo/x is perfectly legal and read as just Foo/x when Foo is not a class?
17:26	Chouser	or do you mean something more than that?
17:27	rhickey	just that we can't go through a path that calls forName. Should just qualify whatever is there, expanding classes and aliases
17:28	rhickey	aliases already work I think
17:29	Chouser	yeah
17:33	Chouser	so Compiler.resolveSymbol should be right -- uses ns mappings, not Class.forName
17:38	rhickey	Chouser: that's what's being called now
17:38	Chouser	resolveSymbol on just the classname, though
17:38	Chouser	I think I have a patch that should do.
17:39	rhickey	ah, be careful as resolveSymbol interns
17:39	rhickey	maybeResolveIn
17:40	rhickey	better
17:42	Chouser	sometimes calls RT.classForName
17:42	rhickey	only when it definitely must be a classname
17:43	rhickey	so, should have uncaught exception if not one
17:43	rhickey	maybeResolveIn is whar resolve uses
17:43	rhickey	what
17:45	Chouser	you want an exception coming out of syntaxQuote!?
17:46	rhickey	will be so only if some.bogus.classname
17:47	Chouser	but that could be some.valid.namespace/foo
17:47	Chouser	why not just namespace.getMapping(Classname)?
17:48	rhickey	ns is checked first
17:48	Chouser	if nil, leave it unresolved at syntax-quote time. if non-nil, expand it.
17:48	Chouser	ah
17:48	Chouser	indeed
17:48	Chouser	ok, so maybeResolveIn is what you want.
17:49	Chouser	no way to make a symbol without interning
17:49	Chouser	is that a problem?
17:50	rhickey	I meant interning in a ns
17:50	Chouser	ah. oh! yeah, that would be bad
17:50	rhickey	that's what resolveSymbol does
17:50	Chouser	ok
17:51	rhickey	we need to move syntax-quote out of the reader in cinc
17:51	Chouser	ok
17:52	Chouser	`(foo) becomes (syntax-quote (foo)) ?
17:52	rhickey	right
17:55	Chouser	maybeResolveIn checks if sym.ns is a namespace, but here sym.ns will always be null. if sym.name is valid.namespace it throws
17:58	rhickey	doesn't it just call getMapping?
17:58	Chouser	no, if sym.ns is null and sym.name has a dot, it calls RT.classForName
17:59	rhickey	yup
17:59	Chouser	but I don't need to resolve namespaces here, just classnames
17:59	Chouser	so I can call getMapping
18:00	Chouser	if that fails, fall back to current behavior (resolveSymbol) which must be getting the namespace resolved
18:03	Chouser	no exception for invalid.classname/foo which is unchanged
18:03	clojurebot	for is a loop...in Java
18:06	rhickey	Chouser: ok
18:06	clojurebot	Why are you asking him
18:06	Chousuke	Has clojurebot become chattier lately? :P
18:16	hiredman	Chousuke: still 1 in 100 chance, maybe just more lines?
20:04	arohner	stupid java question: duck-streams/reader provides read(char[])
20:04	arohner	java.security.MessageDigest wants a byte[]. How do I convert between the two?
20:06	Chousuke	hm.
20:07	Chousuke	I think duck-streams should provide a byte[] reader too, if it doesn't. :/
20:07	arohner	more specifically, duck-streams/reader returns a java.io.BufferedReader, which has read(char[])
20:08	Chousuke	doesn't it have readBytes or something as well?
20:09	Chousuke	hm, apparently not. interesting.
20:12	Chousuke	arohner: looks like you want a bare BufferedInputStream instead of a Reader
20:16	arohner	oh, it looks like duck-streams/to-byte-array does what I want
20:29	bruceq	Hi, I am new to Clojure and am really excited about it. -- Does anyone have experience with Enclojure on Netbeans? I am trying it but no joy.
20:43	arohner	bruceq: I don't use enclojure or netbeans, but you might get a better response if you can describe how it doesn't work
20:43	arohner	it might also be worth asking on the google group
20:44	bruceq	What do you folks use?
20:44	bruceq	as and IDE?
20:45	arohner	I use emacs. people use a wide variety of IDEs. some emacs, some vi, some netbeans and a few others
20:46	arohner	a few of the other java IDEs have clojure plugins in various states of completion, but I don't remember which
20:47	bruceq	The problem in Netbeans is I am getting a NullPointerException in the Enclosure add-on when I try most of the commands. I can Make a REPL oane, but most of the commands like expression evaluation in the source window just throw exceptions.
20:49	bruceq	I looked at AquaMacs on the Mac, but wan't able to find docs on how to set of a Clojure envirmonment. I did find some references to SLIME but all of that stuff seems impenetrable.
20:53	arohner	did you see this for setting up emacs?
20:53	arohner	http://bc.tech.coop/blog/081023.html
20:53	arohner	it's somewhat out of date, but it'll give you a few hints
20:55	bruceq	Thanks. I may try to get that to work with AquaMacs. I noticed in the videos the Rich Hickey is using Aquamacs for his demos.
21:01	arohner	IMO, emacs + slime is the best environment, if you're already familiar with emacs
21:01	bruceq	I am not an emacs user, but I can tolerate Aquamacs.
21:09	arohner	can you use binding to override a defmethod call?
22:35	yangsx	What is the way to go if I want to use Java.io.FileFilter in my Clojure code, which is a Java interface class?
22:36	yangsx	Is proxy is right one?
22:38	Chouser	probably
22:59	lisppaste8	yangsx pasted "how to use FileFilter?" at http://paste.lisp.org/display/83556
23:27	durka42	yangsx: it works for me -- define "it fails"?
23:27	durka42	oh, i see
23:27	durka42	yangsx: accept is supposed to return true or false
23:28	durka42	try wrapping re-matches in (not (nil? _))