#clojure – 2014-01-04

2014-01-04

00:10	egghead	is there anything like hiccup for om dom fns
00:10	noonian	https://github.com/r0man/sablono maybe
00:12	egghead	ah, thanks
00:12	noonian	np
00:13	egghead	all the om/el #js stuff feels very boilerplate :3
00:13	egghead	https://github.com/swannodette/todomvc/blob/gh-pages/labs/architecture-examples/om/src/todomvc/item.cljs#L66-L83
00:40	t3soro	Is there some lock object like a multi-semaphore that can signal all waiting threads?
00:41	marcopolo`	t3soro: what are you trying to do?
00:42	t3soro	synchronize an object and block all ops on it until it's ready
00:43	t3soro	I have a state machine and i dont want to allow ops during a busy state.. never mind i see how its not necessary
00:43	hiredman	there are lots of those infact
00:43	t3soro	how much do i have to pay you?
00:44	t3soro	lol
00:44	hiredman	every jvm object has wait/notify
00:44	hiredman	not that those are great, but they are there
00:46	t3soro	Hmm these are interesting but i got it figured out.. just requires an atomic boolean busy state
00:50	indigo	bitemyapp: http://svn.codehaus.org/groovy/trunk/groovy/groovy-core/src/main/org/codehaus/groovy/runtime/ArrayUtil.java :D
01:39	alew	is reduce lazy?
01:40	TEttinger3	alew: you can reduce over lazyseqs. I believe even then it evaluates them though. to the docstring! ##(doc reduce)
01:41	lazybot	⇒ "([f coll] [f val coll]); f should be a function of 2 arguments. If val is not supplied, returns the result of applying f to the first 2 items in coll, then applying f to that result and the 3rd item, etc. If coll contains no items, f must accept no arguments as well... https://www.refheap.com/22458
01:41	alew	I guess it doesn't really make sense for reduce to be lazy
01:41	TEttinger3	so no, not lazy
01:42	TEttinger3	but you can do something like...
01:42	TEttinger3	,(reduce (fn [_ __] (reduced)) 0 (repeat 1))
01:42	clojurebot	#<ArityException clojure.lang.ArityException: Wrong number of args (0) passed to: core/reduced>
01:43	TEttinger3	,(reduce (fn [_ __] (reduced "whee")) 0 (repeat 1))
01:43	clojurebot	"whee"
01:43	TEttinger3	(repeat 1) is an infinite sequence
01:45	alew	right
02:30	john2x	how do I try out my leiningen template locally?
02:33	TEttinger3	john2x, maybe lein install? I've never used anything but the default template though
02:41	noonian	yeah, lein install
02:42	noonian	then add it to your plugins in .lein/profiles.clj i think
02:42	noonian	in mine its in the form of [<template-name>/lein-template "0.1.0-SNAPSHOT"]
03:09	Clome_	Is there a macro, form, or fn that allowes you to apply a single argument to multiple function (do (fn1 a) (fn2 a) (fn3 a) (fn4 a) (fn5 a)) => (something a fn1 fn2 ...)
03:16	egghead	Clome_: ((juxt fn1 fn2 fn3 fn4) a)
03:17	egghead	,((juxt < >) 1 0)
03:17	clojurebot	[false true]
03:18	`cbp	(doto a f1 f2 f3 f4)
03:36	pyrtsa	Ouch, the semantics of (reduce f xs) could be better than: "If coll has only 1 item, it is returned and f is not called. (...) If coll contains no items, returns val and f is not called."
03:37	pyrtsa	^ That works fine for (+) and (*), but not so much for monoids like sets where the type of the first argument of f is different from the element type of xs.
03:38	pyrtsa	Fortunately (reduce f init xs) works. :)
03:39	pyrtsa	(IMO, a better option would've been to define (reduce f xs) as an error if xs is empty, regardless of f.)
03:45	arcatan	my favorite would be to define f like (defn f ([] unit-value) ([x y] (operation x y))) and then (reduce f xs) = (reduce f (f) xs)
03:45	arcatan	(not actually a good idea, but hey)
05:52	abaranosky	anyone there?
06:13	ddima	probably ;)
06:25	john2x	hmm i'm getting "No such var: clojure.core.cache/through" when trying to start the repl of a project created by my fork of luminus-template. what does it mean?
06:34	anildigital	what's wrong with this code? https://gist.github.com/anildigital/c3f47416b8986bd6b59b
06:34	mrcheeks	john2x: do you depend on it?
06:35	mrcheeks	john2x:depend as lein dependency
06:36	john2x	mrcheeks: no, but probably one of the dependencies that's added by luminus.. strange thing is that the changes I introduced don't remove/add any dependencies.. I just switched some template files around.
06:38	ddima	anildigital: how do you call functions in clojure?
06:38	mrcheeks	anildigital: looks like you're writing code the java way and mixing it up, I'm also still learning though... (1) vs 1 (* 1 1 ) vs (1 * 1)
06:38	ddima	anildigital: you multiply n with a function instead of calling it
06:39	john2x	here's the stacktrace https://www.refheap.com/22463
06:39	ddima	and you also call an int
06:39	anildigital	ddima: corrected that but still get same error
06:39	anildigital	https://gist.github.com/anildigital/c3f47416b8986bd6b59b
06:39	ddima	basically its completely wrong unfortunately, see https://gist.github.com/anildigital/c3f47416b8986bd6b59b
06:39	ddima	err
06:39	ddima	http://stackoverflow.com/questions/1662336/clojure-simple-factorial-causes-stack-overflow
06:40	ddima	wrong link
06:40	john2x	and as a sidenote, since I `lein install`ed my fork of luminus-template, how do I go back to the official version?
06:40	ddima	anildigital: the recursive call is not a proper call still
06:41	ddima	anildigital: what helps if you absolutely dont see your error, try every line on its own in the repl
06:41	mrcheeks	ddima: indeed, but the syntax is all wrong
06:41	ddima	with imaginary values
06:41	ddima	mrcheeks: yeah, as mentioned
06:43	ddima	anildigital: its actually pretty easy to understand, whatever is in the first position of a 'list' () is viewed as a call to this function and the rest are arguments. so if the thing at position one is not a function it wont work. usially X cannot be cast to clojure.lang.IFN
06:43	ddima	this would also happen for (1)
06:43	ddima	,(1)
06:43	mrcheeks	anildigital: Check again function calls in lisp and that should do it (prefix notation)
06:43	clojurebot	#<ClassCastException java.lang.ClassCastException: java.lang.Long cannot be cast to clojure.lang.IFn>
06:47	ddima	anildigital: fixed? ;)
06:49	ddima	there's one more thing you need to understand for your example: whatever statement was evaluated last will be returned by your function - thus 1 or the result of the recursive call, but you dont need to wrap any value in braces
06:49	ddima	,(do (defn footest [] 1 2 3) (footest))
06:49	clojurebot	3
06:54	john2x	found the culprit that's depending on clojure.core/memoize. it's https://github.com/ngrunwald/ring-middleware-format/blob/master/project.clj. But I've added clojure.core.cache to my project.clj already, and it's still throwing the exception
06:54	pyrtsa	arcatan: That's incidentally what clojure.core.reducers asks you to do. :) (Re: "semantics of (reduce f xs)")
06:54	john2x	does it need to be added in core.memoize's dependencies?
06:55	john2x	or in ring-middleware-format's dependencies?
07:07	Clome_	why this (map #(do {% (inc %)}) a) does work but this does not (map #({% (inc %)}) a)? You are allowed to define a fn that just returns a map.
07:12	amalloy	#(x) is (fn [] (x)), not (fn [] x), Clome_. if you substitute {% (inc %)} for x there, you'll see that it expands not to the (fn [x] {x (inc x)}) that you want, but instead to (fn [x] ({x (inc x)}))
07:13	Clome_	thanks
07:14	ddima	Clome_: sometimes macroexpand-1 is your friend ;)
07:15	amalloy	but not in this case, ddima :P
07:15	amalloy	it's really just quote
07:15	amalloy	,'#({% (inc %)})
07:15	clojurebot	(fn* [p1__25#] ({p1__25# (inc p1__25#)}))
07:15	ddima	oh, true, the expand does nothing ;)
07:15	ddima	til
07:19	ddima	amalloy: do you know how thats implemented btw?
07:21	amalloy	https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/LispReader.java#L624
07:21	ddima	thx
07:23	ddima	haven't peeked into the code very much yet, so wasnt able to quickly find it. initially thought it might still be something different than just hardcoded shorthand
07:26	Clome_	I have a vector and I would like to apply a fn to each ele, this ele, when applied to this fn would return a vector. I would like at the end to have a map whos keys are ele of the original vector and values being vectors returned by the function applied on this ele.
07:26	Clome_	example (map #(do {% [% % %]}) [1 2 3 4 5]), now I get a seq of maps, and I would like to merge them all in one map
07:26	Clome_	Is this even the best way to do this?
07:30	amalloy	&(into {} (for [x (range 1 6)] [x (repeat 3 x)]))
07:30	lazybot	⇒ {1 (1 1 1), 2 (2 2 2), 3 (3 3 3), 4 (4 4 4), 5 (5 5 5)}
07:30	ddima	you coult either do a (into {} (map ...) or you could do a (apply merge (map ...))
07:30	ddima	could
07:30	ddima	sry
07:30	ddima	and probably any other number of interesting ways ;)
07:31	hyPiRion	,(let [f #(repeat 3 %)] (reduce #(assoc %1 %2 (f %2)) {} (range 1 6)))
07:31	clojurebot	{5 (5 5 5), 4 (4 4 4), 3 (3 3 3), 2 (2 2 2), 1 (1 1 1)}
07:32	ddima	amalloy: btw, why does the indentation suck so much in the jvm code? ;)
07:32	amalloy	rich is some kind of lunatic, ddima
07:32	amalloy	he purports to like it that way
07:32	ddima	is that so? ;)
07:32	ddima	hehe
07:33	ddima	at first i suspected those parts were generated or something, but nah
07:51	anildigital	ddima: nope not yet. . here is updated gist https://gist.github.com/anildigital/c3f47416b8986bd6b59b
07:55	pyrtsa	anildigital: (n - 1) -> (- n 1). There are no infix operators in Clojure.
07:55	anildigital	ddima: got it right https://gist.github.com/anildigital/c3f47416b8986bd6b59b
07:55	anildigital	pyrtsa: thanks
07:56	anildigital	if you use emacs.. what emacs plugins would help me to do clojure development.. I am already using cider, clojure-mode clojure-test-mode
08:06	guns	Anyone have any tips for performance regression testing? I'm hoping there's already a test wrapper around criterium or something like that…
08:10	TEttinger	guns, I actually don't know what that is, but it sounds like something I could use... if I used unit tests <.<
08:11	TEttinger	anildigital, there's lots of ways to write a factorial in clojure. a fun one is:
08:11	TEttinger	,(reduce * (range 1 10))
08:11	clojurebot	362880
08:12	TEttinger	err needs to be incremented, the 10
08:12	guns	yes, tests that scold you when you make things slower are a good way to keep things fast
08:12	TEttinger	that's actually factorial 9, because range excludes the end
08:13	anildigital	yep
08:13	anildigital	(defn factorialm
08:13	anildigital	[n]
08:13	anildigital	(reduce *' (range 1 n)))
08:13	TEttinger	don't paste multi-lones in the channel please
08:13	TEttinger	*lines
08:13	anildigital	btw.. just for my knowledge... since when reduce is there in clojure?
08:13	anildigital	I heard reducers were introduced couple years back
08:14	TEttinger	you can define them in privmsg to clojurebot
08:14	TEttinger	well
08:14	TEttinger	reduce is different from reducers
08:15	pyrtsa	reduce has been there from the start.
08:15	TEttinger	reduce is a function that takes a collection and a function of two args, like + or *, and goes through and collects them into one value. it's been around since before 1.0
08:15	anildigital	TEttinger: I sent it to clojurebot in privmsg .. does it respond back with pastie
08:15	TEttinger	reduced is a function that can short-circuit eval
08:15	TEttinger	not multiline uuhhhhh
08:16	TEttinger	hang on
08:16	TEttinger	,(defn factorial-m [n] (reduce *' (range 1 n)))
08:16	clojurebot	#'sandbox/factorial-m
08:16	TEttinger	like that
08:16	TEttinger	IRC handles things on a line-by-line basis
08:16	TEttinger	,(factorial-m 9)
08:16	clojurebot	40320
08:16	pyrtsa	Krhm. ,(defn factorial-m [n] (reduce *' (range 1 (inc n))))
08:17	TEttinger	yeah, just copying his
08:17	pyrtsa	Heh, yeah.
08:17	TEttinger	,(defn factorial-m [n] (reduce *' (range 1 (inc n))))
08:17	clojurebot	#'sandbox/factorial-m
08:17	TEttinger	,(factorial-m 9)
08:17	clojurebot	362880
08:17	TEttinger	heyyy
08:17	TEttinger	,(factorial-m 90)
08:17	clojurebot	1485715964481761497309522733620825737885569961284688766942216863704985393094065876545992131370884059645617234469978112000000000000000000000N
08:17	TEttinger	snappy
08:18	TEttinger	capital N is for Big Integer
08:18	TEttinger	capital M is for Big Decimal
08:19	TEttinger	,(factorial-m 90.0M)
08:19	clojurebot	1485715964481761497309522733620825737885569961284688766942216863704985393094065876545992131370884059645617234469978112000000000000000000000N
08:19	TEttinger	,(factorial-m 90.5M)
08:19	clojurebot	135200152767840296255166568759495142147586866476906677791741734597153670771559994765685283954750449427751168336768008192000000000000000000000N
08:19	TEttinger	oh that's interesting
08:21	TEttinger	the range makes reduce behave differently than (I think) the recursive solution on decimal inputs
08:21	anildigital	factorial of 9 was wrong above
08:21	TEttinger	first one yeah?
08:21	anildigital	it is supposed to be 40320
08:21	TEttinger	,(* 1 2 3 4 5 6 7 8 9)
08:21	clojurebot	362880
08:21	anildigital	,(factorial-m 9)
08:21	clojurebot	362880
08:21	anildigital	that's wrong
08:21	TEttinger	I redefined it
08:21	TEttinger	wait
08:22	TEttinger	so factorial doesn't multiply by the number as an arg?
08:22	anildigital	,(defn factorialm [n] (reduce *' (range 1 n)))
08:22	clojurebot	#'sandbox/factorialm
08:22	anildigital	,(factorialm 9)
08:22	clojurebot	40320
08:22	anildigital	that's true
08:22	TEttinger	,(* 1 2 3 4 5 6 7 8 9)
08:22	clojurebot	362880
08:22	TEttinger	that's what a factorial boils down to right?
08:22	anildigital	TEttinger: that's factorial of 10
08:22	anildigital	,(factorialm 10)
08:22	clojurebot	362880
08:23	pyrtsa	,(factorialm 3)
08:23	clojurebot	2
08:23	anildigital	what is best way to learn clojure syntax .. I am long time ruby programmer..
08:23	pyrtsa	Yeah right.
08:24	anildigital	let me know most interesting and fun book to learn clojure .. clojure programming feels like covering eveything.. but not that applicable
08:24	TEttinger	anildigital, you just get used to the parentheses after a while. editors with optional rainbow parentheses help match braces easier
08:24	anildigital	TEttinger: I am long time user of emacs.. so paretheis is okay for me
08:25	TEttinger	ok, then the syntax is just prefix
08:25	TEttinger	function first, then args
08:25	insamniac	I'm reading the Joy of Clojure right now, which I find pretty good for someone with no FP experience.
08:25	shock_one	There is a file var to get the current file's path. But how would I get its directory?
08:27	anildigital	so Joy of Clojure is it?
08:27	shock_one	anildigital: it's called RPN. Also, there is structural editing mode in Emacs for Clojure, I would recommend you to take a look at ti.
08:27	insamniac	I like it.. I also got Programming Clojure, but I left that one at work and haven't looked at it as much.
08:27	TEttinger	parentheses mean try to call the first item in this list. if it fails, (like if the first item is a number), it errors, but quote stops it from trying to call anything inside. that's why lists in clojure are '(1 2 3) instead of (1 2 3)
08:28	anildigital	there was Poignant's Guide To Ruby.. that was fun read..
08:28	TEttinger	shock_one, minus the R in RPN
08:28	anildigital	hope similar exists in Clojure world too
08:28	anildigital	btw how many Ruby devs are here?
08:28	insamniac	there's also 4clojure.com which I like
08:28	TEttinger	a lot of former rubyists actually
08:28	TEttinger	clojuredocs.org (is that right?) is ruby on rails internally
08:31	pyrtsa	Heh, I haven't seen anything similar to _why's Poignant Guide for Clojure. The closest I know of is for Haskell (known as LYAH).
08:36	shock_one	anildigital: I know ruby.
08:37	shock_one	And I don't consider Poignant's Guide To Ruby a very good material for studying. Funny, yes, but not helpful.
08:38	shock_one	So, how to get file's directory. Nobody knows?
08:38	anildigital	clojuredocs.org is so old now
08:38	anildigital	somebody needs to update it
08:41	lnostdal	TEttinger / TEttinger2 : yes, it was a circular symlink .... x)
08:41	TEttinger	shock_one: file gets a File right?
08:42	TEttinger	http://docs.oracle.com/javase/7/docs/api/java/io/File.html#getParent()
08:42	TEttinger	,(.getParent file)
08:42	clojurebot	#<IllegalArgumentException java.lang.IllegalArgumentException: No matching field found: getParent for class java.lang.String>
08:43	TEttinger	,(.getParent (File. file))
08:43	clojurebot	#<CompilerException java.lang.IllegalArgumentException: Unable to resolve classname: File, compiling:(NO_SOURCE_PATH:0:0)>
08:43	anildigital	anything there like docco in clojure
08:43	anildigital	basically I want to setup up a clojure code snippet examples page
08:44	TEttinger	anildigital, what is docco?
08:44	anildigital	http://fogus.github.io/marginalia/ ..
08:44	anildigital	docco like the one for backbone.js and underscore.js documentation
09:33	anildigital	can namespace be like (ns Hello Wolrd)
09:33	anildigital	or (ns "Hello World")
09:34	anildigital	looks like no
09:44	rovar	(ns (md5 "hello world"))
09:51	anildigital	https://gist.github.com/anildigital/0fbdd70a2075db8dc17e what handler i need to provide in ring project.clj if my code is this
10:04	anildigital	is getting this error.. ? any obvious error there? https://gist.github.com/anildigital/e34826a48143af3aa4a4
10:10	anildigital	anyone has example code to show how to serve static html files using ring and compojure
10:15	kzar	I'm messing around trying to implement an example in the book I'm reading myself and the recursion is going wrong somehow. It's running out of heap space but weirdly when I chuck a println in the function I only get a printed output once.
10:16	kzar	(I would have expected the println to be called lots of times, because the recursive function is being called lots of times and therefore printed out tonnes of crap.)
10:17	zerokarmaleft	kzar: paste the code to refheap or something
10:17	kzar	I'd rather not it's pretty awful
10:18	kzar	I'm more asking how do you debug recursion gone-awry? I thought chucking in a println would elucidate but apparently not
10:18	llasram	kzar: It should
10:19	kzar	OK I'll paste but don't judge me heh
10:19	kzar	zerokarmaleft: llasram: https://gist.github.com/kzar/07067986085d63f274b9
10:24	rovar	where can one find more information about pods? It seems there was a big todo in late 2011 and 2012, and I haven't heard anything about them until Fogus' talk from Clojure Conj
10:25	zerokarmaleft	rovar: rhickey's keynote from conj '2012 talks about the idea briefly
10:25	llasram	kzar: I need to go eat, but I'll take a look when I get back if no one else has commented
10:25	zerokarmaleft	I'm not sure if there's an implementation that's fully baked
10:26	john2x	how do I fix "Could not find artifact org.clojure:clojure.core.cache:jar:0.6.3 in central (http://repo1.maven.org/maven2/)" when I try `lein deps :tree`
10:26	john2x	?
10:26	john2x	My connection is fine.. and I can find it in .m2/repository
10:33	zerokarmaleft	kzar: I think you need to examine your base cases again
10:34	kzar	zerokarmaleft: Yes I see a few problems
10:34	kzar	I think it roughly worked I just underestimated how inefficient it was
10:34	kzar	(Which was the point they were making in the book)
10:34	kzar	I'm guessing
10:36	zerokarmaleft	kzar: map is lazy, which is why (println amount) doesn't output anything...it doesn't get a chance to because the recursion blows up before the first value can resolve
10:37	kzar	Yea
10:37	kzar	zerokarmaleft: Updated with slightly better version
10:37	justin_smith	I'm gonna make a single serve page: whydoesn'tyourclojureprogramdoanything.com
10:37	justin_smith	the only content will be "because map is lazy"
10:38	kzar	I'm not sure that's a valid URL
10:38	justin_smith	no, I'll have to refactor that runon
10:40	kzar	This the best way to remove nil's from a sequence? (filter #(not (nil? %)) [nil nil 1 2])
10:40	zerokarmaleft	justin_smith: y-u-no-eager.com
10:40	justin_smith	heh
10:40	justin_smith	kzar: keep
10:40	justin_smith	,(keep [0 1 nil 2 4 nil 5])
10:40	clojurebot	#<ArityException clojure.lang.ArityException: Wrong number of args (1) passed to: core/keep>
10:40	justin_smith	err
10:40	justin_smith	,(keep identity [0 1 nil 2 4 nil 5])
10:40	clojurebot	(0 1 2 4 5)
10:40	kzar	justin_smith: Why not
10:41	kzar	,(filter identity [nil 1 2])
10:41	clojurebot	(1 2)
10:41	justin_smith	one sec - I know I was going for something better than that here
10:42	justin_smith	((juxt (partial filter identity) (partial keep identity)) [0 1 nil false true 2 nil false]) ; kzar
10:42	justin_smith	,((juxt (partial filter identity) (partial keep identity)) [0 1 nil false true 2 nil false]) ; kzar
10:42	clojurebot	[(0 1 true 2) (0 1 false true 2 ...)]
10:42	justin_smith	oops
10:42	justin_smith	notice keep lets false through
10:43	justin_smith	and it's a shorter word too!
10:46	kzar	Hmm my version in the gist works OK for smaller things now except it creates a crazy nested sequence unnecessarily
10:47	kzar	Oh because of the map I think
10:48	llasram	kzar: Do you want `mapcat` instead of `map`?
10:49	kzar	Hmm well I want a sequence of sequences
10:50	kzar	So the first time around I guess I want to use map and the other times I want mapcat... can't help but feel I'm doing this a dumb way though
10:50	llasram	It's an expensive algorithm, but there's nothing fundamentally flawed about your approach to implementing it
10:52	kzar	Good to know, thanks
10:53	llasram	kzar: mapcat only concatenates the immediate results of the applied function. So if your base case returns a sequence of results (where each result is a sequence), then using `mapcat` will give you the concatenated sequence of all results (where each result is still a sequence)
10:54	kzar	llasram: Ah right of course, well again this looks ugly to me but it works OK now https://gist.github.com/kzar/07067986085d63f274b9
10:55	anildigital	I need to serve static files in a directory. any solution in clojure with ring or compojure?
10:57	llasram	kzar: I don't believe you need the `(filter identity ...)`, and the formatting is slightly unusual, but what else bother you about it?
10:58	llasram	anildigital: http://ring-clojure.github.io/ring/ring.middleware.file.html
10:58	justin_smith	anildigital: yeah, there is a static file middleware for ring
10:58	kzar	llasram: Oh does the mapcat do away with the need for filtering away nil values?
10:59	llasram	,(mapcat (constantly nil) (range 10))
10:59	clojurebot	()
10:59	mullr	anildigital: https://github.com/ring-clojure/ring/wiki/Static-Resources perhaps?
10:59	llasram	kzar: As long as none of your `options` are `nil`
11:00	kzar	llasram: Is it idiomatic to wrap options in a vector like I ahve there?
11:00	justin_smith	anildigital: I use ring.middleware.resource/wrap-resource
11:00	anildigital	https://gist.github.com/anildigital/8325ea2381c0edf60939 wrote something like this .. but it's returning 'Hello Another World always"
11:00	justin_smith	which can also serve static assets out of a jar
11:00	llasram	kzar: To make the base case of a recursive algo be a 1-element sequence? Totally
11:01	kzar	llasram: OK I've sorted out the indentation - pasting from repl sort of ballsed it - does it look OK apart from the fact the thing I'm actually doing is dumb?
11:01	anildigital	justin_smith: how to use it in the snippet I shared
11:03	llasram	kzar: Oh, I missed the `lazy-seq` somehow -- you don't need that either :-)
11:03	justin_smith	(wrap-resource root) would work where you have (wrap-file root) - the only difference is that wrap-resource works for things inside a packed jar
11:03	kzar	llasram: I do in case I do (take 10 (change-ways 100 ....
11:04	anildigital	justin_smith: nope.. I have physical directory
11:04	justin_smith	anildigital: wait, the other difference would be not checking "user.dir" and just giving a path relative to the top level of your app
11:04	anildigital	justin I want to point to that directory .. which has html files
11:05	justin_smith	anildigital: I am saying it works for both
11:05	justin_smith	but your wrap-file should work
11:05	llasram	kzar: `mapcat` already returns a lazy sequence. Unless I'm missing something, I don't believe it helps
11:05	kzar	Well I can't explain exactly why but I've tried with and without and it seems to make a difference
11:06	llasram	kzar: You're right -- it does matter! You learn something every day...
11:06	kzar	(Why does it matter?)
11:06	anildigital	https://gist.github.com/anildigital/2de18198a0f203135174 justin_smith this is updated gist as suggested by you .. but it always prints 'Hello Another World'
11:06	kzar	Oh I see maybe mapcat doesn't return a lazyseq
11:06	kzar	(Why not?)
11:07	llasram	No, it does
11:08	llasram	Oh, chunking, of course
11:08	kzar	?
11:08	anildigital	justin_smith: do you see any changes that needs to be done in gist so that it doesn't return 'Hello Another World' and starts serving files
11:09	llasram	No, maybe not
11:09	zerokarmaleft	llasram: heh
11:11	kzar	llasram: Maybe because it's applying functions to the list that realises the list?
11:11	justin_smith	anildigital: don't specify it in terms of user.dir
11:11	kzar	Either way I've got to go get some food myself, thanks for the help
11:11	justin_smith	try with root as "output"
11:11	llasram	kzar: np.... Thank you for the mystery to solve :-)
11:11	kzar	haha
11:12	kzar	llasram: (I think if you type (source mapcat) it's pretty clear what's going on.)
11:12	justin_smith	anildigital: scratch that: make sure "output" is in your resources path, and then you can just use "" as root (you can set resource path in project.clj)
11:13	anildigital	justin_smith: as per https://github.com/mmcgrana/ring/wiki/Static-Resources what is your-hundler there..
11:13	anildigital	I don't get it..
11:13	justin_smith	(-> #'handler (wrap-resource "public")) is the same as (wrap-resource #'handler "public")
11:14	anildigital	justin_smith: but if you see my handler just returns a response map
11:14	anildigital	so it will always return that map... how will it return the files then?
11:14	justin_smith	because you are not setting your resource root properly
11:14	justin_smith	like I said, it needs to be relative to your resource path
11:14	justin_smith	not to the filesystem root
11:15	anildigital	Here is another snippet https://gist.github.com/anildigital/352cf0a463420ea167fb
11:16	justin_smith	well, is "
11:16	justin_smith	sorry
11:16	justin_smith	is "." in your resource path?
11:16	anildigital	it always prints Hello Another World
11:16	justin_smith	what is your resource path, the default is "resources" but you can add other directories
11:16	anildigital	justin_smith: even if I replace "." with "output" .. it returns "Hello Another World"
11:17	justin_smith	by default the top level directory is not in the resources path, so "." will not work there
11:17	justin_smith	do you understand what I am saying about the resource path? I feel like you are ignoring it
11:17	anildigital	justin_smith: okay... but my question is that in my code.. defn handler will always return map.. how (wrap-resource "output" ) will ever get executed
11:18	justin_smith	because it short circuits
11:18	justin_smith	it doesn't always call the handler
11:18	anildigital	https://gist.github.com/anildigital/81044bef044667283bb1
11:18	anildigital	here is latest snippet
11:19	zerokarmaleft	,(time (dotimes [_ 1e4] (take 10 (mapcat (fn [x] [(identity x)]) (range 1e6)))))
11:19	clojurebot	"Elapsed time: 114.322084 msecs"\n
11:19	zerokarmaleft	,(time (dotimes [_ 1e4] (take 10 (lazy-seq (mapcat (fn [x] [(identity x)]) (range 1e6))))))
11:19	clojurebot	"Elapsed time: 4.773144 msecs"\n
11:19	justin_smith	is "output" in your resources-path? how many fucking times do I need to say resources-path? it is a thing you need to modify here!
11:19	anildigital	justin_smith: yes
11:19	zerokarmaleft	wow
11:19	justin_smith	what is your resources-path?
11:19	justin_smith	show me that part of your project.clj
11:20	anildigital	https://gist.github.com/anildigital/bf5af4c882b8d97cacda
11:20	lgs32a	zerokarmaleft: that is a known problem. mapcat is not really lazy
11:20	lgs32a	zerokarmaleft: due to it's use of apply concat
11:21	lgs32a	zerokarmaleft: http://clojurian.blogspot.de/2012/11/beware-of-mapcat.html <- also has a lazy impl.
11:21	zerokarmaleft	lgs32a: cool, thanks for the link
11:23	justin_smith	anildigital: the resources-path is something you need to specify in project.clj
11:23	shock_one	Here's a function that take a file's path and returns its parent folder. Please help me make it more concise.
11:23	shock_one	(defn get-parent [file-path] (->> file-path reverse (drop-while #(not= \/ %)) reverse (apply str)))
11:23	justin_smith	it determines which directories will be available for finding resources
11:23	anildigital	justin_smith: here is the code https://github.com/anildigital/clojurebyexample
11:24	justin_smith	https://github.com/technomancy/leiningen/blob/master/sample.project.clj#L247
11:24	lgs32a	zerokarmaleft: http://dev.clojure.org/jira/browse/CLJ-1218 <-- they consider it minor. I think they should just replace it.
11:24	lgs32a	zerokarmaleft: given that currently it's semi-lazy, which can hardly be intended.
11:24	justin_smith	anildigital: what you need to do is specify a root for wrap-resource that is relative to one of the resource-paths
11:25	anildigital	justin_smith: okay ..
11:25	justin_smith	so if you have :resource-paths ["output"]
11:25	justin_smith	then the root can be ""
11:26	justin_smith	see my github/technomancy/leiningen link above
11:26	justin_smith	it explains in more detail, and shows an example
11:27	anildigital	justin_smith: changed that.. as you can see in https://github.com/anildigital/clojurebyexample but it prints 'Hello Another World'
11:28	justin_smith	the resources-path is not part of the :ring key
11:28	justin_smith	it goes one level above
11:28	justin_smith	so :plugins ... :resources-path ... :dependencies ...
11:29	justin_smith	and not "/" for the root, just "" I think
11:29	justin_smith	though that may not even matter
11:29	lgs32a	could an implementation expert shed some light on why OPs solution here even outperforms a reducer based solution (reducer based solution not included in link)? http://stackoverflow.com/questions/20914683/in-clojure-can-i-optimize-scans
11:29	lgs32a	(it also outperforms a simple reduce-based solution, even when freed from destructoring)
11:31	anildigital	justin_smith: https://github.com/anildigital/clojurebyexample added as separate key and above .. but it still prints 'Hello Another World'
11:32	anildigital	justin_smith: I think you are not getting what I am saying.. the handler is returning hardcoded response.. how will it ever serve static files?
11:32	justin_smith	anildigital: try changing "/" to "" in the last line of core.clj
11:33	justin_smith	you changed it back to wrap-file
11:33	justin_smith	wrap-file does not use the resource path
11:33	justin_smith	wrap-whatever has the option of returning something without ever calling the handler
11:34	justin_smith	if you configure the wrap-file or wrap-resource properly they will return a static file and the handler never gets called
11:34	anildigital	justin_smith: as you can see in updated git repo.. I changed to wrap-resource .. it still doesn't work..
11:34	justin_smith	so if you keep your :resource-paths configuration and change wrap-file to wrap-resources it should work
11:35	justin_smith	OK
11:35	anildigital	also there is no wrap-resources .. there is wrap-resource
11:35	anildigital	it's not short circuiting as expected..
11:36	anildigital	if you could clone that repo and try on your side..
11:36	justin_smith	anildigital: http://localhost:3000/toc.html
11:36	justin_smith	I cloned it, that url works
11:37	justin_smith	with your current codebase
11:37	justin_smith	http://localhost:3000/Hello.html
11:37	anildigital	ah
11:37	justin_smith	that one also, with your current codebase
11:37	anildigital	thanks a lot
11:37	anildigital	yeah..
11:38	justin_smith	it would be more usual to put static resources in resources/output/ and then have "resources" in :resource-paths and "output" as the root for wrap-resources
11:38	justin_smith	btw
11:38	justin_smith	but at least we have something that works now
11:39	justin_smith	the names are not important, what is important is that by having "" or "/" as the resource-root someone could navigate to anything in the top level of any of your jars in classpath (which may not be a serious issue, but is at least weird)
11:47	anildigital	justin_smith: somehow I want to make toc.html as the default resource.. will try to add there
11:49	anildigital	and that is done by putting "toc.html" instead of ""
11:49	justin_smith	anildigital: you could set a redirect of "" to "toc.html"
11:49	justin_smith	or even do a request rewrite on the server side
11:49	anildigital	justin_smith: possibly yes.. but having toc.html as starting point is ok
11:52	justin_smith	anildigital: this could be adapted to turn "" or "/" into "/toc.html" https://www.refheap.com/22471
11:54	anildigital	justin_smith: cool
11:54	justin_smith	anildigital: the definition of tweak-handling was missing before, I just updated
11:54	anildigital	I need to run the app like 'lein run -m clojurebyexample.core/app 4000' so that I can have it in Procfile
11:54	justin_smith	in your case you likely won't care about the request method, and you don't need to check .endsWith, since you have a literal route to rewrite, not a class of routes
11:54	anildigital	but by default there is no jetty.clj or anything. not sure how can I run it that way
11:55	justin_smith	you can create a main that starts up ring
11:56	justin_smith	https://github.com/caribou/caribou-development/blob/master/src/skel/core.clj#L99 like this
11:57	justin_smith	where "server/run-server" would be replaced by jetty/run-jetty I think
11:57	justin_smith	ring.adapter.jetty/run-jetty
11:58	justin_smith	which is basically what lein ring is doing anyway
11:58	justin_smith	but having a real main function is better
11:59	justin_smith	also, for dev lein works, of course, but for deployment you should create an uberjar
11:59	anildigital	ah.. not aware of all these..
12:00	justin_smith	procfile makes me think you are talking about deployment scenarios
12:00	anildigital	justin_smith: yes.. deploy the same on heroku
12:00	anildigital	https://devcenter.heroku.com/articles/getting-started-with-clojure
12:00	justin_smith	oh, heroku expects you to use lein doesn't it
12:00	justin_smith	that's dumb, but I can't fix that
12:01	justin_smith	oh, wait
12:01	justin_smith	it does let you specify a standalone, good
12:01	justin_smith	so don't mind the above
12:02	justin_smith	so yeah, you need a -main function which starts the server
12:02	justin_smith	I think lein ring uberjar creates main for you though
12:02	justin_smith	if you still want to use lein ring
12:02	justin_smith	but what I described / linked to above shows how to create the jar
12:02	justin_smith	*create the main function
12:06	anildigital	java -cp target/clojurebyexample-0.1.0-SNAPSHOT-standalone.jar clojure.main -m clojurebyexample.core.app doesnt work
12:07	justin_smith	you should not need to specify clojure.main
12:07	justin_smith	and app does not start a server
12:08	justin_smith	first off, try "lein ring uberjar"
12:08	justin_smith	then try java -jar target/<some-uberjar>.jar
12:08	anildigital	https://gist.github.com/anildigital/6c95684c9d4849b9a33c done.. but gives error
12:08	anildigital	justin_smith: yep.. same thing
12:09	justin_smith	for uberjar, you should not specify a :main in project.clj
12:09	anildigital	java -jar target/clojurebyexample-0.1.0-SNAPSHOT-standalone.jar .. this worked
12:09	justin_smith	oh, ok
12:10	anildigital	but with that http://localhost:3000/toc.html it's printing 'Hello Another World' only..
12:10	anildigital	short circuit code is not working
12:10	justin_smith	hmm
12:10	justin_smith	wrap-resource should be able to find content inside jars, that is the point of wrap-resource after all
12:11	anildigital	justin_smith: :(
12:11	justin_smith	I have deployed many webapps that do this stuff
12:11	justin_smith	it's just a question of getting everything configured properly
12:12	anildigital	it would be great if this can be run without jar
12:12	anildigital	means dev mode is ok
12:12	justin_smith	try changing resource-paths to "resources", and change the root in wrap-resources to "output" and move output/ to resources/output/
12:13	justin_smith	that would be closer to the usual setup
12:17	anildigital	justin_smith: keeping output as it is 'works' in lein ring server mode
12:17	anildigital	didn't try with standalone yet
12:21	anildigital	okay that worked.. but now I need redirect headers so that instead of 'Hello Another World' .. it redirect to /toc.html
12:24	justin_smith	right, you should be able to use some variation on the funcitons I posted above
12:34	anildigital	justin_smith: somehow heroku needs $PORT to be passed from outside..
12:34	anildigital	java -jar target/clojurebyexample-0.1.0-SNAPSHOT-standalone.jar starts on default port 3000
12:37	anildigital	justin_smith: wow http://boiling-oasis-5467.herokuapp.com/
12:37	anildigital	justin_smith: I am trying to build something similar to https://gobyexample.com .. do contribute if possible
12:37	anildigital	thanks a lot
12:37	justin_smith	congratulations
12:43	anildigital	http://clojurebyexample.com/toc.html
12:43	anildigital	\m/
12:53	maku	Anyone here using Zepto.js with Clojurescript? I am interested in using it with Chris Granger's Library, jayq. The reason being that Zepto can be compiled with The Google Clojusure Compiler in advanced mode.
12:55	danno1	n00b Q: Is the the meta character ^, analogous to annotations?
12:56	lsdafjklsd	maku: i've been getting by with google closure library and a dom management library (om)
12:57	maku	dannol: it is, but we usually call it metadata http://clojure.org/metadata
12:58	dnolen	maku: haven't heard of anyone using Zepto.js, but why do you need to use it with jayq? Isn't the whole idea behind Zepto.js that you don't need jQuery?
12:58	maku	dnolen: jayq is just a wrapper (uses jquery) since zapto and jquery have the same API, I was hoping to use the same wrapper.
12:59	danno1	thanks maku
12:59	dnolen	maku: I would just give it a shot then.
13:00	maku	dnolen: thanks, will do
13:06	bvvd	\whois rhickey
13:08	jtoy	silly question, in my ns I import java.util.Local, then call it like Locale/ENGLISH, but I am getting Caused by: java.lang.ClassNotFoundException: java.util.Local errrors, is there anything else I need to do to use this class?
13:09	Tolstoy	jtoy: (import [java.util Locale]), note the space?
13:09	ivan	also Local != Locale
13:09	hyPiRion	jtoy: I would guess appending an e would help
13:09	jtoy	doh, yes
13:10	jtoy	I hate when that kind of stuff happens
13:10	jtoy	is it just me?
13:10	Tolstoy	Ah, I thought that was just a typo here. ;)
13:10	hyPiRion	nah, I hate it as well
13:11	Clome_	Exists something like this (-> a (fn1 b) (fn b)) => (fn2 (fn a b) b), just that puts "a" as the last argument to fn instead of the first one?
13:12	ivan	->>
13:13	Clome_	>_>
13:13	Clome_	thanks
13:13	Clome_	i will try it
13:13	jtoy	Tolstoy: interesting name
13:15	shock_one	I have some time interval in milliseconds, say 134000. How to convert it to "2 minutes and 14 seconds"
13:18	hyPiRion	shock_one: have a look at clj-time
13:18	shock_one	Already. It can only convert intervals to DateTime.
13:18	hyPiRion	Or, if you want to actually do it manually, I guess you can do something like
13:19	shock_one	No, I want to find some library, but go ahead.
13:19	hyPiRion	ah.
13:19	hyPiRion	Well, then I'm not sure =/ I thought clj-time would provide some of that functionality
13:21	shock_one	Something like this http://apidock.com/rails/ActionView/Helpers/DateHelper/distance_of_time_in_words
13:29	Clome_	a hack (let [sec (/ 134000 1000) min (int (/ sec 60)) rem(- sec (* min 60))] (str min " minutes and " rem "seconds"))
13:30	Clome_	,(let [sec (/ 134000 1000) min (int (/ sec 60)) rem(- sec (* min 60))] (str min " minutes and " rem " seconds"))
13:30	clojurebot	"2 minutes and 14 seconds"
13:31	llasram	It's surely in the underlying JodaTime library
13:38	arcatan	yeah, maybe Joda-Time's PeriodFormatter would be helpful?
13:45	jergason	in clojure, does your declared namespace need to match the directory structure of your project?
13:46	Clome_	as far as I know yes
13:46	noonian	yes, because java does, plus your file names need to use underscores instead of hyphens
13:47	Clome_	be careful about "-" in the namespace. foo-bla => foo_bla.clj
13:47	seangrove	Anyone with a clue able to tell what might be causing this all of the sudden? https://www.refheap.com/06b8f72dc72f0cda8f72545ef
13:49	Clome_	you are allocating too much memory
13:49	Clome_	check for memory leaks or allocate more heap for your jvm
13:50	noonian	do you have :main in project.clj?
13:50	xeqi	seangrove: did you recently change your project.clj file or lein plugins?
13:51	shock_one	I'm pretty sure it's not about lein, try to start repl in another project's directory.
13:52	seangrove	xeqi: No, not at all actually
13:52	seangrove	I've even reverted to a known-good checkout
13:52	seangrove	Although the stack trace is different now..
13:53	Tolstoy	What happens with "lein deps :tree"?
13:55	seangrove	Tolstoy: that runs, shows the dependencies
13:55	seangrove	shock_one: Interesting, looks like it happens elsewhere as well. Maybe something changed with my JVM while I was asleep. I'll look into it
13:55	Tolstoy	seangrove: Ah, well. I was guessing there was some crazy circular thing going on with one of the dependencies (if that's even possible).
13:57	seangrove	Maybe all it needs is a good restart and a warm hug. Might as well give it a try.
13:57	xeqi	seangrove: is that the full stack trace? I'd expect to see where `apply` was being called from?
14:15	devn	shock_one: you could use cl-format as well
14:16	hyPiRion	oh yeah
14:16	hyPiRion	,(require 'clojure.pprint)
14:16	clojurebot	nil
14:17	shock_one	devn: it's pretty cool.
14:17	hyPiRion	hmm,
14:19	shock_one	Tolstoy: are you from Russia?
14:19	Tolstoy	shock_one: Nope. Oregon. ;)
14:21	devn	,(require '[clojure.pprint :as p])
14:21	clojurebot	nil
14:23	devn	,(p/cl-format nil "~D minute~:P and ~D second~:P" 3 30)
14:23	clojurebot	"3 minutes and 30 seconds"
14:23	devn	,(p/cl-format nil "~D minute~:P and ~D second~:P" 1 1)
14:23	clojurebot	"1 minute and 1 second"
14:23	devn	shock_one: ^
14:25	shock_one	Yes, thank you, I got it from the description.
14:26	devn	gotcha. just trying to help! :)
14:26	hyPiRion	Hm, is cl format turing complete?
14:26	devn	uh oh
14:26	devn	a new swearjure approaches
14:27	devn	hyPiRion: by my googling "full CL format is Turing-complete"
14:27	devn	I don't know how close clojure's port comes
14:28	hyPiRion	yeah, the cl one can call functions, not possible yet in the clojure.pprint one
14:28	chchjesus	\
14:28	devn	hyPiRion: btw, i still need to jump into that nasty format string for clojure's pprint-code bug with #()
14:28	devn	hyPiRion: pprint needs a rewrite
14:29	devn	it's a mess
14:29	hyPiRion	haha
14:30	devn	hyPiRion: you laugh, but im not kidding, you've been in there and seen it
14:30	hyPiRion	I should send them an email re: my patch
14:30	hyPiRion	devn: yeah =/
14:30	devn	i was looking at the git blame
14:30	devn	and tom faulhaber is basically the only guy to ever have touched it
14:30	devn	and i think for good reason
14:31	devn	so... now that I've said that, it's time to put my money where my mouth is and start refactoring it into something that resembles clojure 1.5 code
14:31	devn	hyPiRion: did you ever submit a patch on that #() bug?
14:32	hyPiRion	no, because I am not sure what would be correct to do right there
14:32	hyPiRion	but it's not too hard to implement it
14:32	hyPiRion	just need some response
14:33	devn	ah, ill bump it then
14:33	devn	do you have a link handy?
14:34	hyPiRion	uh, no
14:34	devn	lol ill find it
14:34	hyPiRion	(I'm making dinner, so I'm a bit busy)
14:35	devn	hyPiRion: make extra, im coming over
14:36	devn	hyPiRion: in common lisp i wonder what the behavior of this particular issue with fn* would be
14:36	devn	http://dev.clojure.org/jira/browse/CLJ-1181
14:36	devn	not that it is exactly 1 to 1 equivalent with clojure
14:37	devn	but surely there's a similar situation
14:42	NeedMoreDesu	Is there a way to add metadata to any object, like adding it to numbers and still use them as numbers?
14:45	dnolen	NeedMoreDesu: not possible in Clojure, you can do this in ClojureScript via specify.
14:55	NeedMoreDesu	Hm, I guess I need to use WeakHashMap to store meta myself
15:07	stuartsierra	,(identical? (Long. 2) (Long. 2))
15:07	clojurebot	false
15:21	gfredericks	I was just asking the other day about the implications of using proxy to get a Number that has metadata
15:21	gfredericks	nobody responded I don't think :)
15:24	gfredericks	,(let [two (proxy [java.lang.Number] [] (longValue [] 2))] (+ two two))
15:24	clojurebot	4
15:25	stuartsierra	(identical? (.longValue 3) (.longValue 3))
15:26	stuartsierra	,(identical? (.longValue 3) (.longValue 3))
15:26	clojurebot	false
15:27	gfredericks	,(let [two-foo (proxy [java.lang.Number clojure.lang.IMeta] [] (longValue [] 2) (meta [] {:foo :foo}))] [(+ two-foo two-foo) (meta two-foo)])
15:27	clojurebot	[4 {:foo :foo}]
15:41	cark	hello
15:43	gfredericks	hello
15:43	cark	I'm not clear about some details of core.async on the jvm
15:44	gfredericks	which details are those.
15:44	cark	for instance, if i make IO and it blocks for some time, is it correct to use a thread block instead of a go block ?
15:45	cark	thread macro instead of go macro i should maybe say
15:45	devn	cark: thread is basically promises and futures under the covers
15:46	cark	right, but are they there for this kind of scenario, just like send-off and send for agents ?
15:47	cark	also, if i use the go macro, and there are many "automatons" doing computationally intensive stuff, am i safe to assume that there will be cores+2 threads when using the go macro ?
15:48	devn	cark: check out this https://www.youtube.com/watch?v=enwIIGzhahw
15:49	devn	it will give you what you're looking for
15:49	cark	ok doing this right now, thanks !
16:01	pandeiro	is it possible to chmod +x files via lein new templates?
16:01	gfredericks	I think C-u C-u C-x C-e should eval the form, expect a string returned, then insert the raw string into the buffer unescaped
16:01	gfredericks	would be nice for doing formatted stuff
16:04	noonian	pandeiro: you can use clojure.java.shell
16:04	pandeiro	noonian: within the render function?
16:05	noonian	yeah, your main templates fn, after you call ->files
16:05	pandeiro	noonian: perfect, thanks
16:06	technomancy	you don't need to shell out to do +x
16:06	pandeiro	technomancy: use java file api?
16:06	technomancy	right
16:06	pandeiro	k, i just wasn't clear at what point i could do it, thanks
16:07	technomancy	the main thing to remember about Leiningen plugins/templates: "It's Just A Function" =)
16:08	gfredericks	(TM)
16:08	technomancy	unless it's a map
16:08	pandeiro	ah the fine print...
16:08	pandeiro	:)
16:08	technomancy	offer not valid in all jurisdictions; consult a physician before use if you are pregnant or on medication
16:17	gfredericks	side-effects may include, creating a jarfile, erasing your classfiles, or delpoying to clojars.
16:20	pandeiro	so i was expecting the path (.setExecutable (io/file path) true) to be the same as specified in the ->files fn above it... but that method call is returning false
16:20	pandeiro	am i doing something wrong?
16:24	pandeiro	think i maybe have to include the project name in the path as it is relative to the parent directory
16:25	pandeiro	voila
16:32	rukor	what happened to webfui
16:34	jonasen	rukor: https://groups.google.com/d/msg/reactjs/e3bYersyd64/qODfcuBR9LwJ
16:40	rukor	jonasen: ah ok. i just stumbled upon a video on webfui on youtube, and it seemed to have a lot in common with reactjs/om. Thanks.
16:42	dnolen	rukor: Om is more a less a more "serious" version of the WebFUI concept.
16:43	rukor	dnolen: indeed.
16:43	tim__	Bronsa: do the latest tools.analyzer snapshots work?
16:44	tbaldridge	Bronsa: I'm getting "could not locate clojure/tools/analyzer__init.class" from my repl.
16:45	Bronsa	tbaldridge: they work, yes
16:45	Bronsa	tbaldridge: weird, how are you getting that error?
16:46	tbaldridge	I'm getting that error because I'm an idiot. I never saved my project.clj file
16:47	kzar	I did (source let) and it seems to be defined in terms of let* but I can't find let*
16:47	tbaldridge	I think my vacation was too long this year.
16:47	llasram	kzar: It's part of the compiler itself, in Compiler.java
16:47	llasram	A "special form"
16:47	kzar	ah right, so that's not written in Clojure
16:48	llasram	Not yet -- Bronsa is hard at work on Clojure-in-Clojure though :-)
16:48	kzar	(Just in the book I was reading it said how let could be implemented in terms of a lambda so I was curious if that was how Clojure did it.)
16:48	kzar	Hmm I wonder how many non-clojure functions you could get it down to
16:48	tbaldridge	kzar: it can be done that way, that's not to say that it "should"
16:49	kzar	surely
16:49	tbaldridge	kzar: implementing let via fn would most likely be slower than a custom let that just sets a local
16:49	kzar	Yea and also it might be more limited, say how you can define vars in terms of themselves with Clojure's let
16:49	kzar	sorry I mean in terms of previous vars in the let
16:51	hiredman	tbaldridge: it would be more complicated you would compile to lambdas, then when compiling lambdas have some heuristics about turning them in to jvm locals, etc, which actually a lot of papers on optimizing scheme compilers do similar things
16:52	hiredman	which is a lot of work when you can just make let a special form
16:53	tbaldridge	agreed
16:54	marcopolo`	I remember hearing work being done on a browser repl using websockets, anyone know where I can find that?
17:03	arcatan	kzar: using previous vars is not a problem as you can transform that to nested let expressions
17:03	koreth	Hi! I'm a Clojure n00b. I am slightly confused by the "commute" function. The documentation implies it doesn't do retries (and the book "Clojure Programming" says so outright), but when I play with it in the REPL it does seem to retry occasionally. Is that expected behavior?
17:03	kzar	Yea I was just thinking that arcatan
17:04	juanpablo	Clojure noob here. How do I get the first element from a list of the form (1 2 3). What function can I use? (get list 0) fails, same with (first list). Seems like a dumb question, but my googling has failed me.
17:04	cark	,(first '(1 2 3))
17:04	clojurebot	1
17:04	cark	you probably didn't quote your list
17:05	kzar	,(first [1 2 3])
17:05	clojurebot	1
17:05	cark	(1 2 3) is applying 2 and 3 to the function 1, which does not exist
17:05	technomancy	koreth: ref operations can always retry; not sure where the implications otherwise are coming from
17:06	juanpablo	what if my list is not known at compile time? Adding the quote just gets me a compile error
17:06	juanpablo	Don't know how to create ISeq from: clojure.lang.Symbol
17:07	cark	,(let [l '(1 2 3)] (first l))
17:07	clojurebot	1
17:07	cark	maybe you should post your function in a gist
17:09	juanpablo	It's pretty simple. I have a list of the form ((10 11) (5 2) (3 2)) and want to filter that list using the first element of each list member
17:09	marcopolo`	koreth: can you give an example?
17:09	koreth	technomancy: Thanks. I think I just misinterpreted what I was reading -- the "you must accept last-one-in-wins behavior" in the docs on clojuredocs.org implied to me that conflicting writes would just be discarded.
17:09	cark	juanpablo: you obliviously have a little mistake somewhere, showing your coe would help
17:09	cark	code*
17:10	technomancy	koreth: oh dear
17:10	technomancy	koreth: fwiw clojuredocs.org are not official docs; that is a very misleading way of putting it
17:11	technomancy	commute just means the order can change; there's no implication that anything "loses" necessarily
17:11	juanpablo	I'll try to figure it out myself. Clojure is a fun language :). If I fail I'll post back
17:12	hiredman	~alter
17:12	clojurebot	alter is always correct
17:12	koreth	And my confusion started in "Clojure Programming" which says, "A change made to a ref by using commute will never cause a conflict, and therefore never cause a transaction to retry." But apparently that just means the entire transaction won't retry, not that nothing in the transaction will retry. So yeah, my misinterpretation.
17:12	rukor	dnolen: I have a question regarding Om. Lets say I have a table component. Now I want to create calendar component that uses the table c\
17:12	rukor	omponent. No client of the calendar component will ever need to directly provide the table parameters so the data for the underlying tab\
17:12	rukor	le would not be present in the root tree as it is local to the calendar component. Previously, I could knock up the data structure from \
17:12	rukor	within the calendar component and call om/build with it. Now that om/build requires a cursor, what is the best way to handle this sort o\
17:12	rukor	f situation?
17:13	hiredman	use alter and commute is an optimization you can take advantage of in the future if required/possible
17:13	dnolen	rukor: if it's local to the component then doesn't om/IInitState, om/set-state! om/get-state not work for you?
17:13	koreth	hiredman: Totally. Just want to make sure I understand what it's doing so I can use it correctly when the time comes.
17:14	dnolen	rukor: or is the issue that you want to build and don't want to take a cursor? I was going to allow this today.
17:14	dnolen	rukor: via an option I think.
17:15	technomancy	koreth: yeah I thought that commute transactions would never have retries, but I realized that might not always be true
17:15	rukor	dnolen: for things local to the component, yes those will suffice, but need to use this data as the model for another component
17:15	koreth	technomancy: That "you must accept last-one-in-wins behavior" is actually in the official docs too.
17:16	koreth	Or at least I assume http://clojure.github.io/clojure/clojure.core-api.html#clojure.core/commute is official.
17:16	technomancy	huh, that's unfortunate
17:16	rukor	dnolen: to elaborate, it may just be bad design on my part. the table takes as opts, the column specs, and as data, the actual data
17:17	rukor	dnolen: the calendar only takes as data date.
17:17	dnolen	rukor: hm, I think it's legitimate use case
17:17	technomancy	the whole point of commute is that it's safe to use when a conflict doesn't result in one attempt "winning" and one "losing" but both harmoniously succeeding
17:17	rukor	dnolen: so the calendar must build both the cursor for the embeded table component
17:18	rukor	dnolen: without depending on the tree above it
17:18	dnolen	rukor: just to be extra clear, you want to be able to pass raw data to build right?
17:18	juanpablo	Only thing I'm missing is pattern matching to unpack data structures.
17:18	rukor	yes
17:18	dnolen	juanpablo: core.match
17:20	rukor	dnolen: or would detached trees be a possible solution? where the calendar component can create its own root cursor, which it can update when there is an update in the cursor of its own date data, so that the underlying table component would be agnostic of pure data vs cursor
17:21	dnolen	rukor: hrm, I don't want to overthink it, and the details might change in the future
17:21	dnolen	rukor: I think the best thing for now is to provide build-raw for this use case.
17:21	rukor	dnolen: ok
17:21	clojurebot	No entiendo
17:26	sritchie	any graph database users here?
17:26	sritchie	neo4j, etc?
17:29	kzar	Is SICP worth reading for someone without a maths background? People seem to praise it so I'm giving it a go but the first chapter so far seems to be more about maths than code
17:29	sritchie	kzar: I don't have a maths background and thought it was great -
17:30	sritchie	kzar: it's more that the examples are algorithmish
17:30	kzar	Yea
17:30	kzar	Hmm I'll stick with it for a bit longer I guess
17:31	sritchie	kzar: just trying to have fun and get your mind expanded about functional programming?
17:31	sritchie	I always recommend working through the little schemer,
17:32	sritchie	but no one seems to get through the whole thing
17:32	sritchie	(I did, but I did it with pen and paper, didn't have a computer for a few weeks. I think that was the right way)
17:33	kzar	Yea, thought it might help as I've done some Clojure before but never fully grokked it all. I figured perhaps reading it might help. Aim for this year is to get to the point where I'm half productive in Clojure, not sure the best way to go about it though
17:33	kzar	I'm a programmer by trade and I'm generally not bad but I find it hard to get anything done in Clojure if I'm honest which is a shame as I think it's pretty great
17:35	akhudek	kzar: many people seem to recommend http://clojurekoans.com/
17:36	kzar	akhudek: Thanks, well I'll give those a go sometime.
17:36	sritchie	kzar: what kinds of stuff are you building with clj?
17:36	sritchie	kzar: yeah, just for getting started in clj, sicp is too heavy
17:36	kzar	Well currently nothing
17:37	kzar	(I think taking on another project in it might be a good idea.)
17:39	sritchie	kzar: yeah, pick up compojure and try a tiny webapp
17:39	kzar	I've done some webapps a while back using noir and stuff although apparently that's not used anymore
17:40	ordnungswidrig	kzar: there's libnoir now, IMHO
17:40	ered	anyone tried liberator? tempted to give it a go next time i write a rest api
17:40	sritchie	ered: yeah, I have
17:40	sritchie	yeah, it's nice
17:41	ered	i really like what i've read about it
17:41	ered	and that flowchart that tells you exactly what it does when looks really helpful oto
17:41	ered	too*
17:42	technomancy	liberator is great, but I'd recommend starting with more basic ring and pulling it in once your requirements grow
17:43	technomancy	the raw ring abstraction is really great and worth getting familiar with
17:44	technomancy	I guess if you've used noir that might count
17:44	technomancy	but it obscures the simplicity of ring
17:44	ordnungswidrig	the simplicity of ring is great. unfortunately http is anything but simple.
17:45	kzar	technomancy: Yea I remember a lot of people (you maybe!) said that at the time, I think using noir was probably a mistake
17:46	technomancy	ordnungswidrig: real-world http, yes. learning-project http... maybe so, maybe no =)
17:46	ordnungswidrig	technomancy: that's a point!
17:48	technomancy	seeing the progression of a project from raw ring to using liberator could give you an interesting perspective and probably help you appreciate what you get
17:49	ordnungswidrig	My presentation at the conj used this approach.
17:49	technomancy	yeah, I enjoyed that a lot
17:50	dnolen	rukor: added experimental build-raw to master - will think about this more later and see if I can't see a better solution.
17:51	ordnungswidrig	technomancy: this should be mandatory for any library talk :) Hopefully shows the motivation^h^h^h^hright for existence
17:55	ordnungswidrig1	re
17:55	rukor	dnolen: thanks
18:02	sritchie	hmm, google searches are making a heavy case for datomic instead of neo4j for graph modeling
18:02	sritchie	interesting
18:02	tbaldridge	it's really good for that sort of thing
18:13	sritchie	tbaldridge: looks like it. I'm looking at storing GPS coordinates
18:13	sritchie	similar to strava - essentially dumping in a bunch of points of sensor data,
18:14	sritchie	so i can graph the info, and try to extract "pieces" - if someone's doing mile time trials, for example
18:17	kzar	,#{#{true false} #{true false}}
18:17	clojurebot	#<IllegalArgumentException java.lang.IllegalArgumentException: Duplicate key: #{true false}>
18:17	sritchie	yup, not in a literal
18:17	kzar	,#{#{(= "true") false} #{(symbol "true") 'false}}
18:17	clojurebot	#{#{true false} #{true false}}
18:17	S11001001	,(random)
18:17	clojurebot	#<CompilerException java.lang.RuntimeException: Unable to resolve symbol: random in this context, compiling:(NO_SOURCE_PATH:0:0)>
18:17	S11001001	ii eee
18:17	CaptainLex	Why does ring.middleware wrap-multipart-params turn keys into strings instead of keywords?
18:18	kzar	,(rand)
18:18	clojurebot	0.7820192852765594
18:23	devn	is reduce-kv just a performance thing?
18:23	clojurebot	Gabh mo leithscéal?
18:31	thirdy	Functions like my-addition are usually created first in the REPL , and then tested with various inputs. Once you’re satisfied that the function works, you copy the test cases into an appropriate test file. You also copy the function definition into an appropri- ate source file and run the tests.
18:31	thirdy	as in copy paste?
18:38	noonian	thirdy: I prefer to just write them in a namespaced file, and keey running (use 'my.namespace :reload) in the repl
18:40	thirdy	,(doc use)
18:40	clojurebot	"([& args]); Like 'require, but also refers to each lib's namespace using clojure.core/refer. Use :use in the ns macro in preference to calling this directly. 'use accepts additional options in libspecs: :exclude, :only, :rename. The arguments and semantics for :exclude, :only, and :rename are the same as those documented for clojure.core/refer."
18:40	turtil	could someone comment on clojure and how low level it is? im learning Clojure, but i havnt really seen much about its low level-ness... i understand it hinges itself off the jvm, and therefore java, but im not a java developer, never really developed anything in java
18:40	turtil	comments, opinions?
18:41	noonian	it's very high level
18:42	noonian	you can use type hints and transients and things to get closer to raw java but it isn't as idiomatic to do so usually
18:43	thirdy	noonian: coming from java-world, ain't F11 (debug in eclipse), faster than what you mentioned?
18:43	andyf	turtil: It is a high level language, and while you can do some medium-level things for performance, the best way to get closer to the machine details for performance is to write Java or C and call that from Clojure, if you need it.
18:45	noonian	thirdy: maybe, i'm not very familiar with eclipse but that works for me. i also use light tables instarepl but lein repl is simpler to get started with
18:45	thirdy	in Java, I even use an eclipse-plugin to automatically call the corresponding test class upon saving your source code.
18:45	tbaldridge	thirdy: I have that in emacs ALT-` runs all tests
18:45	noonian	i think there are a few eclipse plugins for Clojure
18:47	turtil	noonian: andyf thanks for that, that confirms my thoughts
18:48	akhudek	vw
18:48	akhudek	oops
18:49	andyf	turtil: The Benchmarks Game web site has some sample short Clojure programs for the benchmarks that are often within a factor of 1 to 4 times the run time of Java programs for the same problems, but those Clojure programs are not like ones people typically write in Clojure. Then again, the programs on that site are not typically what anyone would write in any of the languages represented.
18:49	andyf	http://benchmarksgame.alioth.debian.org/
18:50	devn	tbaldridge: just finished watching your deep macros and go macro internals videos
18:50	devn	nice work
18:50	tbaldridge	thanks!
18:51	devn	tbaldridge: it's funny, i've used the multimethod dispatch thing to build little JRuby interop toys, but i never emitted an AST-like thing
18:51	devn	that was an ah-ha moment
18:51	devn	tbaldridge: also, the core.async talk at the conj was fantastic
18:52	turtil	andyf: yeah i have been looking at that, i wasnt so much concerned with Performance, more like doing things with network bytestreams, and playing with the GPIO on Pi, or Pi, similar boards etc
18:53	devn	tbaldridge: there has been some discussion on the overtone mailing list about using core.async -- it made me wonder about broadcast and multiplex in the core.async lab namespace. any idea on whether those things will creep into core.async or not?
18:54	tbaldridge	those have been replaced with mult/mix in the main namespace
18:54	devn	tbaldridge: sam aaron asked about one->many pub/sub capabilities
18:55	devn	tbaldridge: ah, that would be helpful to know as someone peeking at source. they have subtley different docstrings
18:55	tbaldridge	also in the main namespace now
18:55	devn	subtly*
18:56	tbaldridge	which ones have different docstrings?
18:57	thirdy	learning lisp or clojure is a lot harder than a thought. it's like learning programming all over again. even though I'm already using functors in Java
18:58	thirdy	functors in Java as in org.apache.commons.collections.Closure
19:00	devn	tbaldridge: the lab namespace's broadcast and multiplex are subtly different than mult and mix
19:00	devn	the broadcast docstring read, to me, more like what i was thinking of at the time
19:00	tbaldridge	yeah, the lab versions are pretty old, they were created to see what something like that would look like. Rich wrote the stuff in then main ns later on
19:01	devn	could lab's versions be blown away to prevent future confusion along those lines>
19:01	tbaldridge	yeah, they should be remove
19:01	tbaldridge	*removed
19:02	thirdy	any good online class for Clojure, like from Coursera?
19:02	logic_prog_	(1) sign up for the scala one
19:02	logic_prog_	(2) get motivated to study clojure
19:03	devn	tbaldridge: in any event, one more compliment and then i'm off, but: i think you've done a really great job with conj talk about using core.async. it would be cool to see the way you explained it moved into a mini guide or something.
19:03	devn	logic_prog_: ha!
19:04	logic_prog_	tbaldridge: along what devn said, I liked your youtube videos on core.async
19:04	devn	tbaldridge: i should have been more clear, one more compliment/request/suggestion ;)
19:05	devn	a lot of what i've seen with core.async was like: 'look how great this is! it's wildly opaque!' simply knowing that promise/future was underneath (thread) was extremely important to my ability to understand what was happening
19:07	devn	describing it in terms of things i understand != "read CSP by Tony Hoare"
19:07	thirdy	logic_prog_: I did search for a free online class, but none so far
19:08	devn	thirdy: there has been talk in the past about a clojure coursera course
19:08	thirdy	yep, i saw that in the google group
19:08	devn	thirdy: do you strongly value the structure of a course?
19:08	thirdy	I did watch this last night: www.youtube.com/watch?v=CvRGJGK09tc
19:09	thirdy	devn: I think so
19:09	devn	courses are funny things, you know. there rarely exists a one size fits all version of the material that appeals to everyone
19:09	devn	a lot of people with previous background come to clojure with very specific goals
19:09	devn	so you start explaining how lisp works and half the audience yawns
19:10	devn	you start talking concurrency and half the audience already understands a bunch of that material
19:10	devn	etc
19:12	thirdy	devn: haha i agree. however, a good basics course should be there
19:13	ordnungswidrig1	just a quicky: how do I enumerate all paths in a deep datastructure, i.e. everthing I can access with get-in
19:13	thirdy	the video I watch last night explained all the syntax of clojure. however, right now, i'm having trouble with namespaces
19:14	ordnungswidrig1	e.g. {:a 1 :b [:x] :c {:y :z}} => [[:a] [:b] [:b 0] [:c] [:c :y]]
19:14	shoky	thirdy: http://www.infoq.com/presentations/Clojure-Namespaces-Vars-Symbols
19:14	thirdy	devn: imho, apparently, the guy in the video was wrong to say that, "You're ready to write code". Apparently, theres a swarm of functions/macros/special forms to master
19:16	thirdy	I'm correct to say that Clojure syntax is the tip of the iceburg? mastering def, defn, let, ns is the bulk?
19:17	ordnungswidrig1	thirdy: it's actually a very thin tip. like most lisps the syntax is small in clojure
19:17	ordnungswidrig1	thirdy: but don't get afraid
19:17	thirdy	ordnungswidrig1: i was gonna type tip of the tip of the iceburg
19:18	thirdy	shoky: thanks, that should be a good watch, as all the other infoq i've watched previously
19:18	ordnungswidrig1	thirdy: that would be too extreme. And keep in mind: it's a beautiful iceburg!
19:20	thirdy	ordnungswidrig1: yeah thanks. I'm just frustrated to find out that I can't write the Swing-based tool I want as easy as I thought it would be
19:26	hiredman	isn't swing just going to be gross regardless?
19:35	noonian	how can i compare cursors for equality in om?
19:36	dnolen	noonian: should just work
19:37	noonian	hmm
19:37	dnolen	noonian: for maps and IIndexed anyway.
19:38	dnolen	noonian: what types are you trying to compare?
19:38	noonian	maps
19:39	sritchie	anyone here using the hidden input for DELETE reqs in compojure?
19:39	dnolen	noonian: not for cursors equivalence includes state and path
19:39	dnolen	s/not/note
19:40	noonian	hmm, i bet the path is different
19:41	dnolen	noonian: perhaps it make sense to love state and path out of it like when cursors were done via metadata
19:41	dnolen	s/love/leave
19:42	noonian	yeah, i'm just trying to compare pieces of them for value equality
19:48	dnolen	noonian: -value is technically part of the public api
19:48	dnolen	noonian: so you can extract the underlying value and compare those
19:49	noonian	dnolen: thanks, that works great
22:08	m0g	I have a very basic script that loads a bunch of files and put them in a map. My function extract-content-map seems except for the fact that it only handles 8 items in the list of files it is given (that is around 1k files). Any idea why it doesn't process the whole list?
22:08	m0g	https://gist.github.com/m09/8263780
22:19	gfredericks	m0g: nope. but I do know you don't need to use transients
22:19	rovar_	is there a right way to inject variables into an environment when executing a function?
22:19	rovar_	I want to provide the function creator some "implicits" which change based on the context of when the function was executed..
22:20	llasram	gfredericks, m0g: Also, you are trying to bash transients in place, which leads to the results you are seeing
22:20	llasram	m0g: You still need to operate on them functionally -- they just may use mutation as an optimization, so they aren't fully persistent
22:20	gfredericks	llasram: oh? does a transient update function not always return the original object?
22:20	llasram	gfredericks: It does not
22:21	gfredericks	llasram: fascinating
22:21	llasram	So e.g. (doseq ... (assoc! ...)) is always a mistake
22:21	gfredericks	I'm curious why it would be useful not to
22:23	llasram	gfredericks: I don't know, but my guess is that it's related to the interface guarantee that the `transient` function will operate in constant time
22:23	gfredericks	o_O
22:23	gfredericks	okay time to crack open the java files
22:25	gfredericks	bbloom: ha I just noticed the conj edge case is duplicated in the transient variants; as it must be of corse
22:27	gfredericks	llasram: oh I think there's no reason for that to happen except when upgrading from ArrayMap to HashMap
22:27	gfredericks	thus the magic number 8
22:27	bbloom	gfredericks: you mean the conj a seq from a map thing? yeah, annoying
22:27	bbloom	i think at this point, that's forever :-/
22:27	llasram	gfredericks: That makes sense, although I feel like I saw a case where it was happening with ! and transient vectors in someone's code too
22:27	llasram	s,!,conj!,
22:31	gfredericks	is the obsceletization of programmers synonymous with the singularity?
22:32	llasram	I personally sure hope so
22:33	rovar_	the language preferred by the AI would most certainly be a lisp
22:33	gfredericks	llasram: why the strong feelings?
22:34	llasram	gfredericks: Oh, a friend just recently had me read Vonnegut's /Player Piano/, and the it ended up mostly annoying me
22:35	llasram	The premise essentially involves people automating themselves out of their jobs, and the subsequent social results
22:35	llasram	But I think it's pretty much impossible to automate away the job of automating things w/o hitting the singularity
22:36	gfredericks	yay we are forever employed until such time as we cannot plan for anyhow
22:37	gfredericks	so it annoyed you because you expect that most people can stay employed as programmers?
22:37	gfredericks	rather than massive unemployment?
22:42	llasram	haha. Kind of. It presented the vast majority of people with nothing to do and hence doing nothing, to a degree I found almost offensively dismissive of the ingenuity of the average person
22:43	npatten	.join #emacs
22:43	npatten	whoops!
22:43	gfredericks	npatten: what a weird password
22:43	llasram	Joining another channel!
22:43	llasram	~guards
22:43	clojurebot	SEIZE HIM!
22:44	npatten	at least emacs enables clojure =)
22:44	gfredericks	clojure: powered by emacs
22:45	seangrove	Not for much longer, LT is steamrolling in
22:45	seangrove	You watch!
22:45	seangrove	Just give it another ~20-25 years.
22:45	gfredericks	in the singularity all the AIs use LT
22:46	tbaldridge	if LT ever figures out what it wants to be
22:46	npatten	good things come to those who wait?
22:46	llasram	pfft. Emacs is clearly a better interface for machine intelligences
22:46	llasram	Especially with their ability to select key combinations unhindered by the limitations of physical hands
22:46	gfredericks	I watched some of rhickey's harmonikit talk; he made a sex joke about emacs
22:47	seangrove	gfredericks: Is it online yet?
22:47	gfredericks	I guess that's what happens when you let him not keynote
22:47	npatten	m-x foreplay
22:47	gfredericks	seangrove: yeah it's on youtube somewhere
22:47	tbaldridge	youtube.com/clojuretv
22:47	seangrove	Ah, see it now, thanks
23:02	bellkev	has anyone noticed austin's browser-connected-repl being broken in newer versions of clojurescript?
23:02	bellkev	I noticed that it works in v1847 and not in v2138
23:03	bellkev	so far, I've tracked it down to an error being thrown in cljs.closure/get-compiled-cljs in the new version but not the old...
23:04	gfredericks	if a polymorphic dispatch is closed, should a case be faster than a protocol?
23:04	gfredericks	(case on the class, I mean)
23:04	gfredericks	or maybe a condp with instance?
23:04	tbaldridge	gfredericks: condp probably not, it has to run p for every value
23:04	tbaldridge	protocols have some tricks to make them fast in places where you're always dispatching on the interface
23:05	gfredericks	the interface is irrelevant here
23:05	gfredericks	all via extend-protocol
23:05	gfredericks	shoulda said that initially
23:06	tbaldridge	in that case there is still some caching involved.
23:06	gfredericks	so stick with the protocols?
23:06	tbaldridge	Use protocols unless you can reduce it to case
23:06	gfredericks	what would the case type be?
23:06	gfredericks	a string?
23:06	gfredericks	(comp str class)?
23:07	tbaldridge	(case x val1 expr val2 expr2 ...)
23:07	tbaldridge	only works for keywords, ints and something else....
23:07	gfredericks	so probably not applicable here, right?
23:07	gfredericks	just making sure I'm not missing some trick
23:08	tbaldridge	yeah it depends on your use case I guess.
23:08	tbaldridge	Protocols are pretty darn fast
23:10	gfredericks	$findfn :foo/bar "foo/bar"
23:10	lazybot	[]
23:11	Bronsa	,(str (.sym :foo/bar))
23:11	clojurebot	"foo/bar"
23:11	gfredericks	ooh, clever
23:13	gfredericks	hmm
23:13	gfredericks	that involves a call to String#intern
23:13	gfredericks	oh I guess just once
23:16	unionx	hello?
23:16	clojurebot	BUENOS DING DONG DIDDLY DIOS, fRaUline unionx
23:16	Bronsa	lol
23:17	gfredericks	(inc clojurebot)
23:17	lazybot	⇒ 32
23:17	unionx	(inc clojurebot)
23:17	lazybot	⇒ 33
23:17	unionx	(dec clojurebot)
23:17	lazybot	⇒ 32
23:17	unionx	lol
23:18	gfredericks	well that was worthwhile
23:20	Bronsa	tbaldridge: AFAIK case works with everything, ints & keywords should simply be faster
23:21	tbaldridge	, (case x (atom 42) true)
23:21	clojurebot	#<CompilerException java.lang.RuntimeException: Unable to resolve symbol: x in this context, compiling:(NO_SOURCE_PATH:0:0)>
23:21	tbaldridge	, (case 4 (atom 42) true)
23:21	clojurebot	#<IllegalArgumentException java.lang.IllegalArgumentException: No matching clause: 4>
23:21	gfredericks	Bronsa: not classes though, I wouldn't expect
23:21	tbaldridge	, (case (atom 42) (atom 42) true)
23:21	clojurebot	#<IllegalArgumentException java.lang.IllegalArgumentException: No matching clause: clojure.lang.Atom@a6b3cd>
23:21	tbaldridge	yeah...so not refs...dumb example
23:21	gfredericks	,(case '(atom 42) (atom 42) true)
23:21	clojurebot	#<IllegalArgumentException java.lang.IllegalArgumentException: No matching clause: (atom 42)>
23:21	Bronsa	tbaldridge: that's because the test don't get evaluated
23:22	tbaldridge	yeah
23:22	gfredericks	Bronsa: ^ still didn't work
23:22	tbaldridge	,(case '(atom 42) '(atom 42) true)
23:22	clojurebot	true
23:22	gfredericks	wat
23:22	Bronsa	gfredericks: that's because.. ##(case 1 (1 2) true)
23:22	lazybot	⇒ true
23:22	tbaldridge	case is really really odd, I try to only use it when working with ints or keywords
23:22	gfredericks	oh geez
23:23	gfredericks	,(case '(atom 42) ((atom 42)) true)
23:23	clojurebot	true
23:23	Bronsa	so you're not actually quoting it, you're matching on 'quote and '(1 2)
23:23	gfredericks	,(case 'quote '(atom 42) :hahaha)
23:23	clojurebot	:hahaha
23:23	gfredericks	that's a neat trick :)
23:24	Bronsa	gfredericks: it'd work on classes, if you can embed one there either via #=(Class/forname "..") or via a macro
23:25	gfredericks	,(binding [print-dup true] (print-str ns))
23:25	clojurebot	"#=(find-ns sandbox)"
23:25	gfredericks	,(binding [print-dup true] (print-str Number))
23:25	clojurebot	"#=java.lang.Number"
23:26	Bronsa	i.e (eval `(case Integer ~Integer 1)) will work
23:26	gfredericks	that would be an interesting benchmark
23:28	jergason	what is the standard clojure http library that everyone uses?
23:28	jergason	err http request library
23:29	gfredericks	clj-http
23:29	jergason	thanks friend
23:30	gfredericks	(inc me)
23:30	lazybot	⇒ 3
23:33	TEttinger	,(print (double-array [0.0 1.1 2.2]))
23:33	clojurebot	#<double[] [D@10ef4d>
23:33	TEttinger	,(binding [print-dup true] (print-str (double-array [0.0 1.1 2.2])))
23:33	clojurebot	#<IllegalArgumentException java.lang.IllegalArgumentException: No method in multimethod 'print-dup' for dispatch value: class [D>
23:34	TEttinger	oh that's interesting
23:34	TEttinger	,(defmethod print-dup (Class/forName "[D") [a out] (.write ^java.io.FileWriter out (str "#=" `(double-array ~(vec a)))))
23:34	clojurebot	#<MultiFn clojure.lang.MultiFn@f02ba0>
23:34	TEttinger	it doesn't seem to defmethod in a sandbox
23:34	TEttinger	,(binding [print-dup true] (print-str (double-array [0.0 1.1 2.2])))
23:34	clojurebot	"#=(clojure.core/double-array [0.0 1.1 2.2])"
23:35	TEttinger	oh, i just did it in privmsg...
23:39	bvvd	,((fn [n] (cond (= n 0) 0 (= n 1) 1 :else (recur (+ (- n 1) (- n 2)))) 4)
23:40	clojurebot	#<RuntimeException java.lang.RuntimeException: EOF while reading>
23:41	bvvd	,((fn [n] (cond (= n 0) 0 (= n 1) 1 :else (recur (+ (- n 1) (- n 2))))) 4)
23:41	clojurebot	#<ArithmeticException java.lang.ArithmeticException: integer overflow>
23:41	gfredericks	timeout
23:41	gfredericks	oh or that
23:41	gfredericks	timeout if you give it 4N :)
23:43	TEttinger	the (recur (+ (- n 1) (- n 2))) thing is pretty silly
23:43	TEttinger	since for 4 that recurs with 5, not going lower
23:44	gfredericks	unless the extremely strong goldbach conjecture holds
23:46	gfredericks	,((fn [n] (case n (0 1) n (recur (+ (- n 1) (- n 2))))) 4N)
23:46	clojurebot	Execution Timed Out
23:49	bvvd	hmm... i realized i was adding the 2, w/ (recur (+ (- n 1) (- n 2))) once u pointed that out
23:53	gfredericks	,(.nextProbablePrime (java.lang.BigInteger. "77777777777777777777"))
23:53	clojurebot	#<CompilerException java.lang.ClassNotFoundException: java.lang.BigInteger, compiling:(NO_SOURCE_PATH:0:0)>
23:53	gfredericks	,(.nextProbablePrime (java.math.BigInteger. "77777777777777777777"))
23:53	clojurebot	77777777777777777789
23:57	bvvd	,((fn fib [n] (cond (= n 0) 0 (= n 1) 1 :else (+ (fib (- n 1)) (fib (- n 2))))) 6)
23:57	clojurebot	8
23:59	bvvd	spent over an hour trying to get that to work, TEttinger observation 'for 4 that recurs with 5', made it obvious thanks!