#clojure – 2014-05-07

2014-05-07

00:08	Jaood	so why does lein repl switches you to the core.clj namespace in the the app template and not in the library template?
00:08	gtrak	Jaood: the :main controls this
00:09	gtrak	or :init-ns
00:09	gtrak	if there's no -main
00:09	gtrak	in repl-options
00:09	gtrak	https://github.com/technomancy/leiningen/blob/master/sample.project.clj#L308
00:11	Jaood	gtrak: oh I see, thanks
00:26	rhg135	So I have some shared state, a map, and need to use it concurrently to perform io, so can't swap!, any ideas?
00:26	gtrak	rhg135: you'll have to be more specific.
00:27	rhg135	How so?
00:27	gtrak	I don't know :-)
00:27	rhg135	I figured it was a dead end
00:27	gtrak	I guess, what's in the map, what's the IO?
00:27	gtrak	what needs to be concurrent?
00:28	rhg135	The io is a async put!
00:29	gtrak	async put from the map, or into the map?
00:29	rhg135	This is for an irc/xmpp server
00:29	rhg135	A channel in the map
00:30	gtrak	so, you're doing put! into a channel, what's the map got to do with it?
00:31	rhg135	I need to access and update it but do io meanwhile
00:31	gtrak	you need change the channel out, or something else?
00:32	rhg135	Yes
00:33	gtrak	is there supposed to be some kind of coordination or synchronization? Ie does the thing that puts have an opinion about what channel it ends up going on?
00:34	gtrak	err.. I guess, what's it supposed to do..
00:34	gtrak	if you want to distribute requests across a bunch of channels, you could just use a lazy sequence.
00:34	rhg135	I'm probably doing it wrong but the channel writes to a client
00:36	gtrak	now that sounds like a lookup table of ID->client-channel.
00:36	rhg135	Basically
00:36	gtrak	so.. you don't need to be swapping out channels, just adding or removing them.
00:37	rhg135	It's actually bigger
00:37	gtrak	if each client has a unique id.
00:37	rhg135	It has chat channels too
00:37	rhg135	And they do
00:40	rhg135	If this was sequential I could use a reduce, that concurrency
00:41	gtrak	yea, I guess the intrinsic structure of it isn't obvious to me.
00:42	rhg135	I think I know how, when I get to my computer I'll paste it
00:48	rhg135	{:users {:an-user {:chan <ch> :timeout <number> :channels ["#clojure"]}}} ; state, gtrak
00:49	gtrak	my suspicion is you're trying to do something manually that could be better expressed as go-loops.
00:50	gtrak	or some other kind of built-in glue.
00:51	rhg135	I am but I'm struggling with managing this state
00:51	gtrak	you shouldn't have to look up channels to put! every time, it sounds like a job for tap and mult.
00:52	gtrak	or the pub/sub stuff.
00:52	rhg135	Hmm
00:52	rhg135	I didn't know
00:54	rhg135	Any good examples?
00:55	gtrak	haven't used it myself, but I found this: https://github.com/halgari/clojure-conj-2013-core.async-examples/blob/master/src/clojure_conj_talk/core.clj#L394
00:55	gtrak	I've had to stare at the source to get anywhere in core.async.
01:37	Mongey	Hey, can someone help explain how this piece of code works?
01:37	Mongey	https://gist.github.com/Mongey/adbdd1519549ece3c313
01:38	arrdem	,([1 2 3 4] 2)
01:38	clojurebot	3
01:38	arrdem	wat
01:38	arrdem	Mongey: is that a hint?
01:38	Mongey	a hint ?
01:39	arrdem	Mongey: what do count, range, map om/build and comment-data do as functions?
01:40	Jaood	Mongey: what don't you understand about the code?
01:42	Mongey	Jaood: what the "#(" infront of the om/build does
01:42	arrdem	in fairness explicit types would make that a little easier to understand, but only bearly.
01:42	arrdem	*barely.
01:42	arrdem	Mongey: #() creates an anonymous and presumably partially applied function
01:42	arrdem	,(#(+ 1 %1) 2)
01:42	clojurebot	3
01:43	arrdem	,(#(into [] [%]) 1 2 3 4)
01:43	clojurebot	#<ArityException clojure.lang.ArityException: Wrong number of args (4) passed to: sandbox/eval77/fn--78>
01:43	arrdem	crud.
01:43	Mongey	ok, I guess that makes sense.
01:43	arrdem	Oh. % == %1
01:44	arrdem	,(#(+ % 1) 1)
01:44	clojurebot	2
01:44	arrdem	yep.
01:44	Jaood	Mongey: yeah, what arrdem , its syntax for function literals
01:44	Jaood	*said
01:45	Mongey	and then % is the first argument ?
01:46	Jaood	yes
01:46	MarlaBrown	(d/q '[:find ?nick ?channel ?text :in $ ?nick :where [?m :message/author ?nick] [?m :message/text ?text] [?m :message/channel ?channel]] (d/db @conn) "Jaood")
01:46	MarlaBrown	#{["Jaood" "#clojure" "*said"] ["Jaood" "#clojure" "Mongey: yeah, what arrdem , its syntax for function literals"]}
01:46	arrdem	well... strictly only argument.
01:46	gws	Mongey: one confusing thing might be the use of comment-data as a function - when you do that its argument must be an integer and it's the key into the vector you want to retrieve
01:46	arrdem	MarlaBrown: wat
01:47	arrdem	MarlaBrown: i c u writing datomic queries...
01:47	gws	,(["foo" "bar"] 0)
01:47	clojurebot	"foo"
01:47	gws	Mongey: ^
01:48	Mongey	I see
01:48	MarlaBrown	its more like a function being called on a value than a "query" ;)
01:50	arrdem	heh
01:51	Jaood	arrdem: why does a CinC still doesn't exist if there already is a Clojure compiler to bootstrap it? or it ain't that easy? :)
01:51	arrdem	Jaood: CinC does exist... it''
01:51	arrdem	it's just tools.analyzer and tools.emitter.jvm
01:51	arrdem	and my yet to be named GSoC compiler...
01:52	arrdem	which I actually should talk to tb and bronsa about naming...
01:52	Mongey	makes sense now, thanks
01:52	Jaood	oh haven't seen those, can you resume what each one of those do? :)
01:53	arrdem	"resume"?
01:53	Jaood	I guess one emits java bytecode and the other is the parser?
01:53	Jaood	Jaood: forgot the word, not a native english speaker
01:54	Jaood	maybe 'explain' would had been better
01:54	arrdem	tools.reader is a lexer/parser, tools.analyzer is a metadata analysis framework and tools.emitter and tools.emitter.jvm are bytecode generators
01:55	arrdem	Jaood: 'explain' or 'revise' would have been legitimate, although 'revise' would be a relatively archaic word choice.
01:55	arrdem	'review' could have made sense too.
01:55	Jaood	arrdem: thanks
01:56	irctc	hey all... for anyone who uses incanter here... trying to do a simple x y axis plot with dates... using time-series-plot but the formatting of the dates on the x-axis is really unexpected. would someone mind enlightening me as to what's wrong with this code here?
01:56	irctc	http://postimg.org/image/kra5hs4yl/
01:56	Jaood	arrdem: so you are going create a standalone compiler out of those tools?
01:56	irctc	mail
01:57	arrdem	Jaood: out of the reader and analyzer at least. I'll be building a very different emitter I suspect.
01:58	Jaood	arrdem: so the compiler won't need to rely on ASM anymore right?
02:00	arrdem	Jaood: my compiler will probably still use ASM unless someone convinces me to extend my existing bytecode library to emit jvm bytecode. My goal is to build an alternate compiler which performs some relatively aggressive optimization and analysis at the expense of generating very different bytecode than standard Clojure.
02:00	arrdem	where the tools.emitter.jvm system strives for bite-for-byte parity in emitted code.
02:01	Jaood	interesting, good luck then!
02:08	amalloy	tools.emitter.jvm aims for byte-compatibility? i thought bronsa was touting its ability to not emit unnecessary casts
02:09	arrdem	amalloy: that may be the case, but the point is that it's shooting to be a stable drop in replacement for the existing compiler that behaves almost identically besides being written in Clojure. Or at least that's my understanding.
02:13	Jaood	arrdem: is the reason bytecode backward compability?
02:32	sm0ke	hey i have a profile in lein :foo with :test-paths ["foo"] and /foo is a top level directory, but when i do `lein with-profile dev,foo test` even the regular tests are also running
02:36	jeremyheiler	sm0ke: the test command automatically merges in the test profile
02:38	sm0ke	hurm
02:40	sm0ke	https://github.com/dakrone/cheshire/blob/master/project.clj
02:40	sm0ke	this seems to be working
02:40	jeremyheiler	a shot in the dark, but maybe try `lein with-profile -test,dev,foo`
02:40	sm0ke	dont know how
02:40	sm0ke	the benchmark profile in that
02:41	sm0ke	seems to run only benchmark tests with mucking around with anything else
02:41	sm0ke	without*
02:43	sm0ke	weird i doubt if it has something to do with selectors
02:43	sm0ke	even the benchmark tests are not anootated ^:benchmark
02:43	sm0ke	impossibru!!
02:44	foofoobar	Hi. I'm doing clojure koans: "Higher-order functions take function arguments": (= 25 (___ (fn [n] (* n n))))
02:44	foofoobar	How to solve this?
02:45	arrdem	I'd use #(% 5) for _
02:46	MarlaBrown	(find-partial "solve" (d/db @conn))
02:46	MarlaBrown	#{["foofoobar" "#clojure" "How to solve this?"]}
02:46	arrdem	MarlaBrown: you keep doing that...
02:46	MarlaBrown	i need sleep
02:46	arrdem	MarlaBrown: coffee?
02:46	arrdem	or that... I should do that too.
02:47	foofoobar	arrdem, ah, an anonymous function, thanks for the hint!
02:47	foofoobar	MarlaBrown, what should this tell me?
02:48	MarlaBrown	foofoobar: the nsa is everwhere man
02:48	MarlaBrown	prism + datomic == love
02:48	arrdem	and if the NSA isn't listening then some other jackarse is for their own entertainment :P
02:48	MarlaBrown	:thumbsups:
02:48	arrdem	I need to get an emacs plugin to render those as glyphs
02:49	MarlaBrown	clojure needs an emoji reader macro
02:50	arrdem	I'm a fan of this...
02:51	MarlaBrown	#/smile/
02:51	arrdem	ha
02:51	arrdem	well what you could do is #emoji :smile:
02:51	arrdem	,:smile:
02:51	clojurebot	#<RuntimeException java.lang.RuntimeException: Invalid token: :smile:>
02:51	arrdem	or not...
02:52	MarlaBrown	dispatch macro needs a leading character
02:52	arrdem	you could totally do #emoji "smile", and maybe #emoji smile
02:52	sm0ke	arrdem: no you cant
02:53	sm0ke	#my/emoji "simle" is possible though
02:53	sm0ke	smile*
02:53	MarlaBrown	#emo/ji smile
02:53	arrdem	oh. right. סּ_סּ
02:54	sm0ke	#emo/ji ":P"
02:54	arrdem	pls can make this a thing and add clojurebot support for it
02:54	arrdem	will gladly put 10kDOGE bounty on it :P
02:54	arrdem	or I should say ###emo/ji "=D"
02:55	arrdem	funny... lazybot shoulda seen that one.
02:56	sm0ke	hmm ## '?
02:56	lazybot	⇒ ?
03:06	MarlaBrown	watcher.core=> #emo/ji hearteyes
03:06	MarlaBrown	"😍"
03:06	MarlaBrown	my poor project
03:09	arrdem	:bowtie:
03:09	arrdem	:D
03:10	foofoobar	arrdem, again stuck: "Numbers are not the only things one can reduce": (= "longest" (reduce (fn [a b] (if (< __ __) b a)) ["which" "word" "is" "longest"])))
03:11	arrdem	foofoobar: what is a string?
03:11	foofoobar	a char sequence?
03:11	arrdem	Bingo! How do we get the length of a sequence?
03:12	foofoobar	count
03:12	arrdem	Right. that should be all you need.
03:12	foofoobar	ah, got it working :)
03:12	foofoobar	Nice, thank you!
03:13	foofoobar	I thought doing something like (< "foo" "foobar") aready compares the lengths
03:14	arrdem	:-1:
03:14	bracki	Having a hard time with: #<CompilerException java.lang.RuntimeException: Unable to resolve symbol
03:15	bracki	What is usually calling this? I can't neither repl,run nor uberjar
03:15	bracki	s/ll/us/
03:17	bracki	All I do is try to (:use clj_finagle.core).
03:18	bracki	Can anybody spot what's wrong here: https://github.com/jcrean/clj-finagle/blob/master/src/clj_finagle/core.clj#L31?
03:18	arrdem	,(println ":wink:")
03:18	clojurebot	:wink:\n
03:20	devurandom	Hello!
03:21	devurandom	I still have to get used to thinking in Clojure:
03:21	beamso	lein try clj-finagle downloads teh intarwebs
03:22	wink	o_O
03:23	devurandom	I have an (atom {:foo {:bar {:some data}}}) and I want to update it by adding something for every element of :foo :bar, so that it looks like: (atom {:foo {:bar {:some data :more date}}})
03:23	devurandom	How do I do that properly?
03:24	jeremyheiler	devurandom: what do you mean by "for every"?
03:24	MarlaBrown	watcher.core=> (println "not sure if I" #emo/ji heart " you, or think you smell like" #emo/ji poop)
03:24	MarlaBrown	not sure if I 😍 you, or think you smell like
03:25	devurandom	Sorry, actually it is (atom {:foo {:bar {:some data} :baz {:other data}}}) -> (atom {:foo {:bar {:some data :more data} :baz {:other data :even more}}})
03:25	MarlaBrown	it truncated my emoji
03:25	MarlaBrown	:(
03:26	devurandom	jeremyheiler: :foo contains lots of keys, and for each I have already set some data. Now I want to add other data (that is used by another part of the program) to the existing keys.
03:26	beamso	bracki: at a guess the defn for processor is lower in the source code than the defn for rpc-service-impl
03:27	devurandom	I did something like (swap! the-atom assoc :foo (map (fn [k v] ... new-v) (:foo the-atom)), but that does not seem to do what I want.
03:28	jeremyheiler	devurandom: maybe get all the keys and reduce over them, updating the atom on each step?
03:28	jeremyheiler	(reduce (fn ...) the-atom (keys you want to update))
03:30	devurandom	Hm. the-atom contains the :foo key in the first level, and what I want to update is the map inside :foo. Can I update iterate over all keys in (:foo the-atom) and update them with what you wrote?
03:31	jeremyheiler	(keys (:foo @the-atom)) will get you the keys you want
03:31	jeremyheiler	well, at least all teh keys in teh :foo map
03:33	amalloy	devurandom: (swap! the-atom update-in [:foo] (fn [foo] (reduce ...)))
03:36	arrdem	w00t managed to get the "standard" github emoji installed into erc-smiley :D
03:45	devurandom	amalloy, jeremyheiler: Thanks!
03:46	MarlaBrown	erc-smiley?
03:46	MarlaBrown	ah emacs
03:52	foofoobar	(= (repeat 100 :foo) (take 100 (iterate __ :foo))))
03:52	foofoobar	Which functions combines them ?
03:52	Glenjamin	,(doc iterate)
03:52	clojurebot	"([f x]); Returns a lazy sequence of x, (f x), (f (f x)) etc. f must be free of side-effects"
03:52	TEttinger	so identity?
03:53	Glenjamin	,(= (repeat 100 :foo) (take 100 (identity :foo))))
03:53	clojurebot	#<IllegalArgumentException java.lang.IllegalArgumentException: Don't know how to create ISeq from: clojure.lang.Keyword>
03:53	Glenjamin	,(= (repeat 100 :foo) (take 100 (iterate identity :foo))))
03:53	clojurebot	true
03:53	Glenjamin	typo :)
03:54	foofoobar	,(doc identity)
03:54	clojurebot	"([x]); Returns its argument."
03:54	foofoobar	oh, simple.
04:21	roelof	how can I destruct this the right way: http://pastebin.com/dTnKbazt
04:26	maxthoursie	roelof: seems you got some unbalanced paranthisis there?
04:26	roelof	maxthoursie: sorry what do you mean with that ?
04:29	maxthoursie	reiddraper: there's too many square brackets
04:29	maxthoursie	sorry, wrong completion
04:30	maxthoursie	roelof: ^
04:33	roelof	maxthoursie: oke , I think the problem is in the let part. I have to destruct two variables rectangle and point. Maybe use two times let ?
04:33	maxthoursie	roelof: no need for that
04:33	maxthoursie	roelof: (let [[[xr1 yr1] [xr2 xr2]] rectangle
04:33	maxthoursie	[xp yp] point]
04:34	roelof	yep, that part I mean
04:34	maxthoursie	roelof: that's rewritten in a way that works
04:34	roelof	I think I have done something wrong there but I have no idea what
04:35	maxthoursie	roelof: hm so how would you write it with two lets?
04:36	roelof	oke, I see where i go wrong. the first [ has to be when all variables are decontruct
04:37	maxthoursie	roelof: also, double check your var nams, xr2 appears twice
04:38	roelof	oke, done that but still a problem. When I do (contains-point? (rectangle [0 0] [2 2]) (point 1 1)) it must be true and my form says false
04:39	roelof	found it another variable error
04:40	maxthoursie	good
04:43	clgv	roelof: if you want that function to be robust you should sort x and y coordinates of the rect each
04:45	roelof	clgv: I see what you mean. How can I implent sort into it . Im trying to learn clojure by the iloveponies github lessons
04:47	maxthoursie	roelof: you could just (sort [xr1 xr2)) and deconstruct that
04:48	maxthoursie	roelof: In this case just using an or to also check for the (< xr2 xp xr1) case is simpler
04:49	clgv	roelof: for two values just via `if` ;)
04:49	roelof	oke , thanks for the little lesson
04:49	clgv	but maybe the suggested solution via `or` is shorter
04:50	clgv	,(let [a 2, b 1, [a b] (if (< a b) [a b] [b a])] (println a b))
04:50	clojurebot	1 2\n
04:51	clgv	roelof: one option for inline sorting. ^^
04:52	roelof	oke, I see how it works
04:52	maxthoursie	roelof: to make it readable, I would go with a helper function
04:52	maxthoursie	roelof: (defn within [a b p] (or (< a p b) (> a p b)))
04:54	roelof	oke, Im now at a exercise where I must check if a rectangle is in another rectangle. I destruct it and I think now I see a lot of and for this
04:56	roelof	I have to check for every point of the smaller rectangle if its true or false and I can use the fuction I wrote containspoint ?
04:56	roelof	maybe a cond ?
04:57	maxthoursie	roelof: just play with it
04:59	roelof	I know, I m thinking aloud sorry
04:59	maxthoursie	np
05:54	dhruvasagar	Hey guys, can someone recommend a good web framework ? I am looking at Luminus & Noir
05:55	maxthoursie	dhruvasagar: My recommendation would actually be to start with something basic like only ring+compojure
05:55	maxthoursie	dhruvasagar: Then you will know what you want after a while
05:55	dhruvasagar	maxthoursie: hmm and that would be good because i'd learn the internals ?
05:57	dhruvasagar	maxthoursie: also, would you recommend a good book for clojure ?
05:57	dhruvasagar	maxthoursie: s/would/could
05:57	maxthoursie	dhruvasagar: well, internals feels like a harsh word, basics maybe. Most web stuff in clojure is based on ring
05:58	maxthoursie	dhruvasagar: I like The Joy of Clojure since it focus more on how to think than how to do
05:58	dhruvasagar	maxthoursie: cool, I think I already have that book, i'll read it :)
05:59	dhruvasagar	maxthoursie: thanks
05:59	maxthoursie	np
06:05	sm0ke	:D
06:06	systemfault	I bought JoC… I hated reading it :P
06:06	maxthoursie	systemfault: why?
06:06	locks	systemfault: :O
06:07	systemfault	maxthoursie: The content is very good but there are way too much explainations… to me, it was boring.
06:07	clgv	dhruvasagar: in case you are knew to lisp start with "clojure programming" or "programming clojure (2nd edition)" - read the example chapters to see which writing style you like more
06:08	clgv	*new
06:08	maxthoursie	systemfault: well, I can agree with that it was slow at times
06:10	locks	_slow_?
06:10	locks	did you know Lisp already?
06:13	Morgawr	my favorite clojure books are Clojure programming and The Joy of Clojure
06:14	Morgawr	I also read High Performance Clojure Programming (or something like that) which is really good, goes very deep into the tuning of clojure (and also java/jvm) programs and how to get the most juice out of the CPUs
06:14	systemfault	Morgawr: I should buy Clojure Programming.
06:14	Morgawr	I have it on my bookshelf and often go back to it to read a few paragraphs of stuff I forgot or I want to know more about, it's good
06:17	clgv	systemfault: are you sure? if you found JoC slow, I cant imagine what you say about the "Clojure Programming"
06:18	Morgawr	maybe just give it a quick look and check the index of the chapters and read a few pages in and see if it suits you before buying it
06:18	systemfault	Ah :/
06:18	Morgawr	I mean, we have the ~internet~
06:22	maxthoursie	I find it slow when they just walk through every part of the lib like a reference manual. For me it's how to think in fp and organize code and such which is really new and hard to lookup
06:23	Morgawr	I personally find quick blog posts and videos of conference talks to be more suited for that kind of approach, I prefer to use books as quick reference and additional support to language feature and APIs
06:23	Morgawr	but this is just personal preference
06:23	maxthoursie	I like it better when functions are introduced when needed by a larger example, than just linearly by namespace
06:24	maxthoursie	Morgawr: Interesting, I tend to find the opposite. Reference type stuff is easy for me to look up on the internets. How to think is harder
06:26	clgv	maxthoursie: then the writing approach of "Clojure Programming" suits you, right?
06:27	maxthoursie	clgv: Yes, I liked that one
06:27	maxthoursie	Keep mixing it up with the M-t version though
06:27	clgv	"M-t"?
06:28	maxthoursie	as in the emacs command
06:28	maxthoursie	that is swap words
06:28	Morgawr	I found "programming clojure" to be pretty poor imo compared to the others, but I didn't read it whole (only a few chapters here and there)
06:28	clgv	lol. emacs shortcuts as abbreviation for words in a sentence...
06:29	Morgawr	it also works in bash to swap characters :P
06:29	maxthoursie	Morgawr: I agree, that's the book I've liked the least, but also didn't read it.
06:29	maxthoursie	fully
06:29	clgv	I'd describe the wrinting style of "Programming Clojure" as much more technical...
06:30	clgv	but you are able to read through it in approx. 3-4 days and have learned the most important basics.
06:33	maxthoursie	Isn't that true for most of the books on clojure?
06:37	mengu	i've read programming clojure probably 3 times
06:37	mengu	and on the 4th time, i got it
06:37	mengu	but that's just me, an idiot, who takes his time to grasp things :-)
06:39	locks	mengu: so a normal person then :P
06:39	mengu	well, on the 4th time, i sat down and said to myself; i'm going to understand this book now. :-D
06:50	clgv	maxthoursie: I could only read the first book fulltime, so I dont know ;)
06:53	maxthoursie	I've read five books on clojure, and it starts to feel like they're all the same
06:57	sw1nn	mpenet: I'm looking at hayt - what's the preferred way to handle clj 'kebab' style keyword identifiers. It looks to me that the CQLEntities for Keyword needs a tweak? Here's a gist showing my experiments: https://gist.github.com/6193e97b421e8d317e72
06:58	maxthoursie	sw1nn: how do you get a cider-scratch buffer?
06:59	sw1nn	maxthoursie: M-x cider-scratch
06:59	maxthoursie	I don't have that, version?
07:00	sw1nn	CIDER 0.7.0alpha (package: 20140505.1132)
07:00	sw1nn	it claims C-j evals last sexp, but I don't have that, haven't investigated.
07:01	dhruvasagar	clgv: thanks
07:01	sw1nn	so I use C-x, M-e
07:01	maxthoursie	seems like I'm on cider 0.5
07:02	clgv	maxthoursie: well would be odd if it were different, then some books would tell you bullshit ;)
07:02	maxthoursie	clgv: haha, well, in a way that's true.
07:07	mpenet	sw1nn: the cql spec wants quotes around identifiers with -
07:07	mpenet	sw1nn: hayt does this for you if you just use a string
07:07	sw1nn	mpenet: yes, but the keyword handling in CQLEntitie protocol doesn't put them in
07:07	mpenet	(select :meta-data (columns "a-b" "b-c") (where [[= "a-b" "foo"]])) should do it
07:07	mpenet
07:07	mpenet	hmm
07:08	sw1nn	mpenet: is there a downside to doing it for keywords too?
07:08	maxthoursie	sw1nn: works great, thanks for the tip
07:08	mpenet	sw1nn: perf hit for the most common case imo
07:09	sw1nn	mpenet: most common case is to use strings for column names? really? would have thought keywords would be more common?
07:09	mpenet	no, I mean double quoting always
07:09	mpenet	ex you could have an id that's namespaced foo.bar
07:10	mpenet	foo."bar-baz"
07:10	mpenet	etc
07:10	sw1nn	mpenet: ah, hadn't thought of that.
07:10	mpenet	I did took some liberties in the name of performance too, kw are the most common, kw including dashes not so much
07:11	mpenet	just quote them when it's the case and you ll be good
07:11	mpenet	(->raw (select :meta-data (columns "a-b" "b-c") (where [[= "a-b"
07:11	mpenet	"foo"]])))
07:11	mpenet	"SELECT \"a-b\", \"b-c\" FROM meta-data WHERE \"a-b\" = 'foo';"
07:12	mpenet	also CQLEntities follows the definition of the CQL spec to the letter, it's used in tons of places, so I aimed for a behavior that matches best (imho) the spec
07:13	mpenet	I mean cql-identifier
07:14	sw1nn	keywords with dashes are very common in my code, maybe I'm odd in that regard?
07:15	mpenet	well, let's just say it's not so common in CQL usually, it's very clojure-like mostly
07:15	mpenet	mostly because it forces to use quoting, and people are lazy :)
07:16	mpenet	but you can extend the protocol for your use I guess, it should do no harm
07:17	sw1nn	so, summary is 'using identifiers with - is not common for CQL, so choose clojure keywords without dashes or make sure you quote before passing to hayt"?
07:17	sw1nn	mpenet: anyway, thanks for the help
07:17	mpenet	yes, the short version is when using clj keywords as cql identifiers no quoting happens, ever
07:19	mpenet	might be of interest : http://cassandra.apache.org/doc/cql3/CQL.html#identifiers
07:21	maxthoursie	deobalds: did you get cider 0.7.0 to work? I'm running into the same problem as you did on the 1:st of may
07:21	devurandom	I have a (def state {:foo {[1 2] :bar [3 4] :baz}}) and want to access (-> state :foo [x y]), but it does not work this way (no item ... in vector of length 2). How does it work?
07:24	emlyn	devurandom: I think you want (get-in state [:foo [x y]])
07:25	emlyn	devurandom: what you have expands to ([x y] (:foo state))
07:26	joelkuiper	Hey! I'm trying to dynamically load a file (outside of classpath) and refer to a specific var in it
07:26	maxthoursie	devurandom: and a vector is not a function
07:26	deobalds	maxthoursie: Nope. :( Sadly, we just rolled everyone back to 0.6.0.
07:26	maxthoursie	deobalds: how do you downgrade with package-install?
07:27	joelkuiper	What I do right now is slurp the file then load-string and then (var-get (intern (symbol "the persumed namespace") (symbol "var")))
07:27	joelkuiper	is that the best way to do it?
07:27	devurandom	emlyn, maxthoursie: Thanks!
07:28	joelkuiper	It's basically my code, so it can be assumed safe. By naming convention I ensure that the path of the file and the ns are the same (such that intern knows the ns where to look)
07:33	deobalds	maxthoursie: Again, sadly... we just copied over someone's emacs.d who hadn't upgraded yet. :/
07:33	maxthoursie	deobalds: yupp, doesn't seem to be another way
07:33	joelkuiper	this is what I mean: https://gist.github.com/joelkuiper/e9d34f3053fa795a5cd3
07:34	joelkuiper	(loading a var from a file)
07:34	maxthoursie	deobalds: successfully downgraded manualy. Thanks for your info.
07:36	joelkuiper	"concrete use case, I have some third-party definable processing stuff that I wish to call, without knowing beforehand which are availabel
07:36	joelkuiper	so they are put in some resource folder
07:36	joelkuiper	and I attempt to load them at runtime with some naming conventions
07:38	joelkuiper	(by third-party I mean trusted third-party, so whatever is in those files I assume safe)
07:56	clgv	joelkuiper: whats wrong with "load-file"?
07:58	f3ew	What's the clojure equivalent of Perl's Data::Dumper?
07:58	deobalds	maxthoursie: How did you downgrade manually, out of curiosity?
07:58	maxthoursie	deobalds: I had an old copy of my .emacs.d, just as you said
08:03	broquaint	f3ew: pprint? http://clojuredocs.org/clojure_core/clojure.pprint/pprint
08:04	ssideris	f3ew: pprint for pretty output, pr-str for everything in one line. Those can be eval'ed in after they've been written out to strings, but this is not best practice. Check clojure.edn
08:06	f3ew	out*
08:06	f3ew	Is there the equivalent of @_?
08:06	ssideris	nope
08:06	ssideris	you can pass any data structure to pr-str
08:07	ssideris	,(pr-str [1 2 3 #{10 20}])
08:07	clojurebot	"[1 2 3 #{20 10}]"
08:07	joelkuiper	Right so I updated the thing; but I feel it's completely stupid https://gist.github.com/joelkuiper/e9d34f3053fa795a5cd3
08:07	ssideris	it just turns it into a string that can later be read by clojure.edn/read-string
08:07	f3ew	Lovely. How do you figure out what is being passed to a function (I'm trying to write an input parser, and I don't quite grok where the hook in this code fits in)?
08:08	f3ew	The point of trying to dump the input is so that I can actually see WTF is happening
08:08	ssideris	f3ew: https://github.com/clojure/tools.trace
08:09	ssideris	using this will allow you to say deftrace instead of defn when defining your function, which will print out all input params and the result every time the function is called
08:11	systemfault	Looks awesome, thanks ssideris :) (Still learning)
08:11	ssideris	no prob
08:12	ssideris	do you have a REPL?
08:12	systemfault	f3ew: Must be quite a jump from Perl to Clojure :/
08:12	ssideris	I can't believe I used to like Perl. No disrespect f3ew
08:13	ssideris	systemfault: perl has map()!
08:13	systemfault	awesome! What are you waiting for to write a blog called “Perl is a functional programming language” and post it on HN? ;)
08:15	broquaint	It's not really a functional language but functional techniques can be applied - http://hop.perl.plover.com/
08:15	ssideris	broquaint: I was about to mention that book :-)
08:30	devurandom	Thanks again everyone for your tremendously useful help! My app runs now nicely, after porting it from JS! :)
08:31	devurandom	Of course, I assume there are still lots of things that can be improved, once I know Clojure better.
08:32	CookedGryphon	Has anyone here used jayq? I'm getting issues with No such namespace $
08:32	CookedGryphon	anybody got ideas as to what that means?
08:34	beamso	have you included jquery?
08:34	CookedGryphon	yes, in a script tag
08:35	CookedGryphon	when I put it in :externs I got all sorts of warnings as it tried to parse the jquery file
08:35	ssideris	CookedGryphon: I haven't used it, but interestingly, this commit seems to be about $ as a namespace: https://github.com/ibdknox/jayq/commit/297fbf394e91a89d3ebe75f60363b8d1492621c4
08:36	CookedGryphon	ssideris: interesting, I noticed that commit but didn't actually look at it
08:36	CookedGryphon	I assumed it had made it into the latest release
08:36	CookedGryphon	as it was so long ago, and the current project.clj says the same version I got from clojars
08:37	CookedGryphon	but looking at the source on my machine, that doesn't appear to be the case
08:37	beamso	jquery is in the page before jayq?
08:38	CookedGryphon	beamso: yeah
08:38	CookedGryphon	does clojurescript know not to munge my calls out to jquery?
08:38	beamso	no idea
08:38	beamso	http://hugoduncan.org/post/clojurescript-libs-with-js-dependencies/
08:41	jcromartie	what is a good naming convention for reference type variables
08:41	jcromartie	like, delay, future, atom, etc.
08:42	jcromartie	like, if I had (let [x (some-expensive-op)] …) and I changed it to (let [x (delay (some-expensive-op))] …)
08:42	jcromartie	I would want to change the name x
08:42	jcromartie	but to what?
08:42	jcromartie	x-ref?
08:43	CookedGryphon	ssideris: so I built from master and that seems to do away with the warnings interestingly
08:43	clgv	well they are IDerefs ro "ref would fit if it is not misinterpreted to refer to a "ref" only
08:44	jcromartie	yeah
08:52	ssideris	CookedGryphon: hm, good to know... maybe you should insist that the developers release a new version
08:52	CookedGryphon	ssideris: yeah, I'll file an issue
09:33	mdrogalis	Howdy folks. I'm working on a project that needs to include a dependency in a Leiningen project. I'm not allowed to have the source to the dependency for legal reasons. Whenever I include the jar in the project file, it's unable to resolve it's dependencies. How does one work around that?
09:34	agarman	what dependency?
09:34	mdrogalis	Client's in-house library. Nothing public.
09:35	mdrogalis	Can't use an uberjar since that's not meant for Maven.
09:35	agarman	k, you need to put the jar into a local repos
09:35	mdrogalis	agarman: Indeed. I've installed it into .m2
09:36	agarman	the path has to be correct
09:36	mdrogalis	agarman: I'm sorry, which path?
09:36	agarman	the path in .m2
09:37	mdrogalis	agarman: Right, it's successfully installed with the appropriate group, artificat id, version, and packaging parameters.
09:40	mdrogalis	Huh, fixed it. I decompressed the jar, moved the pom.xml file and replaced the one in .m2. Shrug
09:40	mdrogalis	Perhaps I hit a bug or something. Thanks!
09:42	mskoud	I'm using a future to repeat a task every 5 seconds (while true (do xx sleep)), but after some days the future has stopped. Will an exception in the future stop it? How can i detect if a future stops?
09:44	agarman	exception in the do will break your while loop and percolate up to the future
09:44	agarman	breaking the future
09:45	mdrogalis	mskoud: If you're running a process for days on end, you might want to use something more robust for daemons.
09:45	justin_smith	mskoud: you can call done? to see if a future has completed
09:45	justin_smith	also agents have some built in features for specifying an error handling function
09:45	agarman	or just deref and see if you have an exception
09:46	justin_smith	agarman: well the deref will block if the future has not completed
09:46	mskoud	the future never ends, its a loop which sleeps for some secs and do some work and repeat.
09:46	justin_smith	mskoud: it will end and done? will return true if an exception breaks the while loop
09:47	mskoud	yes right.
09:47	mskoud	but i would need to deref within regular intervals to check if it return an exception.
09:48	mskoud	maybe futures it not the way to go.
09:51	ssideris	mskoud: because futures run in separate threads, you wont see the exception
09:51	mskoud	you, that probertly what happened. Will try to catch the exceptions, and see it that solves it.
10:00	agarman	justin_smith if you want to restart a failed future, deref that returns would be a good watch-dog
10:01	agarman	,@(future (throw (Exception. "foo")))
10:01	clojurebot	#<SecurityException java.lang.SecurityException: no threads please>
10:02	agarman	exception isn't lost, it'd be in the future as the result
10:04	irq0	is there a way to attach metadata to multimethods and retriving it from all methods?
10:12	visof	how can i write this java code as clojure new TripleString(x.toString(), y.toString(), z.toString()); ?
10:13	broquaint	visof: (TripleString. (.toString x) (.toString y) (.toString z))
10:16	justin_smith	or even (TripleString. (str x) (str y) (str z)) I think
10:17	justin_smith	yeah, str calls toString when called with a single arg (returning "" on nil)
10:18	TEttinger	,(.toString nil)
10:18	clojurebot	#<NullPointerException java.lang.NullPointerException>
10:18	TEttinger	so that's a reason to use str
10:20	visof	broquaint: what if i want to set values like this this.header = header; ?
10:20	visof	broquaint: how can i do this in clojure
10:22	visof	i want to convert much of this java code to clojure https://www.refheap.com/85214
10:24	visof	is this possible?
10:24	ToxicFrog	visof: if "this" is a java object, I think you use set! for it? I haven't done much java interop. If you're replacing it with a clojure map or similar, use assoc.
10:25	bbloom	visof: that sort of constructor is trivial:
10:26	bbloom	(deftype PlainHeaderIterator [header pattern pos])
10:26	bbloom	(defn plain-header-iterator [header pattern] (PlainHeaderIterator. header pattern 0))
10:29	CookedGryphon	In clojurescript, should I be able to pr-str anything, like i can in clojure?
10:30	CookedGryphon	I'm trying to log stuff out as clojure data rather than javascript objects, so I just called pr-str on it, but I'm getting a "no protocol method imapentry.-key for type string
10:30	nillkill	quick question for anyone, if I were trying to convert this function https://github.com/apache/incubator-storm/blob/master/storm-core/src/clj/backtype/storm/command/list.clj#L21-L38 from printing to returning a map of information {:name “blah” :status “blah}, why does this code seem to only return the last element https://gist.github.com/msukmanowsky/84239439070b17fca2c6
10:32	visof	bbloom: i just wanted to rewrite this method to get only first match
10:32	visof	not list of results
10:32	cshell	Is there a leiningen plugin for scp’ing an uberjar/artifact over and calling a startup/bounce script?
10:34	ToxicFrog	,(into {} (map identity [{:a 1 :b 2} {:a 2 :b 2}]))
10:34	clojurebot	{:b 2, :a 2}
10:34	ToxicFrog	nillkill: ^
10:34	ToxicFrog	map returns a seq of maps; into then adds them to {} in sequence, each one overwriting the previous.
10:34	ToxicFrog	Because they all have the same keys.
10:35	justin_smith	you may want merge-with
10:35	justin_smith	depends on the shape you want for the output
10:35	ToxicFrog	Yeah, the most straightforward conversion is just to return that seq.
10:35	ToxicFrog	You say you want "a map of information", but keyed by what? id?
10:35	nillkill	ah, so something like this? (into {} (map identity #({:id (.get_id %) :name (.get_name %)…
10:36	nillkill	well basically i get a list of topology information objects
10:36	nillkill	thrift ones
10:36	nillkill	which i’d want to convert into a map that has keys :id, :name, :status, etc
10:36	nillkill	mapping to fields on those objects
10:36	ToxicFrog	Right, you already have that part working.
10:36	BobSchack	CookedGryphon: what datastructure are you trying to log?
10:36	ToxicFrog	But you have a seq of these individual maps.
10:37	CookedGryphon	BobSchack: If I knew that I wouldn't need to log it :P
10:37	CookedGryphon	BobSchack: I think it's a map of keyword to js objects
10:37	CookedGryphon	but possibly not
10:37	justin_smith	nillkill: nitpick - #({... }) is usually wrong, that is trying to call the map literal as a function
10:38	nillkill	yeah, i’m starting to see that :)
10:38	nillkill	ahh so sorry what i really want is a list/vector of maps
10:38	nillkill	so (into [] (...)
10:40	ssideris	or even (vec (...))
10:40	nillkill	yeah, that should be fine too
10:40	justin_smith	,(group-by :id [{:a 0 :b 1 :id 0} {:a 2 :b 2 :id 1} {:a 3 :id 22}]) nillkill: this can be useful too
10:40	clojurebot	{0 [{:id 0, :b 1, :a 0}], 1 [{:id 1, :b 2, :a 2}], 22 [{:id 22, :a 3}]}
10:40	justin_smith	then you can do :id based lookup
10:41	nillkill	ahh, that’s really cool justin
10:41	ToxicFrog	<3 group-by
10:42	BobSchack	CookedGryphon it sounds like you're trying to use string as a map
10:44	BobSchack	It's saying it can't find the -key method for the IMapEntry protocol for the string type. Here's the protocol (https://github.com/clojure/clojurescript/blob/master/src/cljs/cljs/core.cljs#L265)
10:44	CookedGryphon	BobSchack: yeah, i see that's the error
10:44	CookedGryphon	I don't get how doing str on something should give me that error
10:45	CookedGryphon	as if I remove the str and just log x, it's fine
10:46	BobSchack	can you show me the code?
10:47	nillkill	so sorry guys, still not clear on the best way to convert the list of topologies into maps themselves. Is therea more idiomatic way to do https://gist.github.com/msukmanowsky/84239439070b17fca2c6 ? This raises the clojure.lang.ArityException as i understand #({:id (.get_id %)}) expands to (fn [%] ({:id (.get_id %)}))
10:47	justin_smith	cshell: I was wrong, lein deploy is only for putting jars into repos
10:48	cshell	justin_smith: no worries - I haven’t seen a good one for ssh deploying combined with any type of startup/shutdown command
10:48	justin_smith	cshell: what about spawning a simple shell script as an injection for a specific profile?
10:49	cshell	justin_smith: Yeah, that would work - I was looking at that or something like conch (shell abstraction)
10:49	justin_smith	I have used jenkins, where jenkins calls lein to build the jar, and then executes the commands to put it on prod and restart the server
10:49	cshell	justin_smith: so the script to scp and any other remote commands goes into jenkins?
10:49	justin_smith	cshell: the commands were entered as one of the steps in the jenkins deploy config
10:50	cshell	justin_smith: ah, cool!
10:50	justin_smith	I mean jenkins is a whole other can of worms and may be more than you need, just mentioning that is what I used.
10:51	justin_smith	jenkins can watch your master branch, and push a deploy to production whenever master updates and tests pass
10:51	cshell	justin_smith: it makes sense - what were youusing to stop any existing deployment?
10:51	cshell	justin_smith: a kill of some kind?
10:51	CookedGryphon	BobSchack: 'fraid not, it's proprietary and I can't produce a trivial example, I'll keep looking, I'm probably just doing something daft
10:52	justin_smith	cshell: for that part I had a couple of scripts, one sec and I'll share
10:56	justin_smith	cshell: https://www.refheap.com/85216 this is three scripts - they are imperfect, but are a good start I think
10:56	justin_smith	compile / deploy / run
10:56	justin_smith	the run script handles both starting and stopping
10:56	clgv	CookedGryphon: try-catch around the reported location? (provided that exists in CLJS)
10:57	justin_smith	cshell: I think if two deployments tried to happen at once things may get messy - that is left as an exercise (or maybe just "don't do that")
10:57	cshell	justin_smith: cool, this is really hepful, thanks!
10:58	cshell	~justin_smith++
10:58	clojurebot	Huh?
10:59	cshell	guess that’s only in #java
11:00	justin_smith	we use inc here
11:00	justin_smith	but thanks
11:00	cshell	~inc justin_smith
11:00	clojurebot	No entiendo
11:00	justin_smith	(inc juxt)
11:00	lazybot	⇒ 9
11:01	cshell	(inc justin_smith)
11:01	bbloom	(inc notation-of-the-gods)
11:01	lazybot	⇒ 41
11:01	justin_smith	you would think that function would be more popular
11:01	lazybot	⇒ 1
11:01	CookedGryphon	interesting, so I have done the old comment out bits and see if it still works trick, and it always seems to be something to do with where i'm doing a clojure.set/union
11:02	ssideris	nillkill: what you wrote is the equivalent of (vec (map (fn [x] ({:id (.get_id x)})) topologies))
11:02	CookedGryphon	is there some gotcha with sets in clojurescript?
11:02	ssideris	this will try and call the map as a function: ({:id (.get_id x)})
11:02	ssideris	maps are functions, but I don't think that's what you're trying to do in this case, right?
11:03	cbp	(inc tree-seq)
11:03	lazybot	⇒ 1
11:04	nillkill	ssideris: basically trying to do something similar to (vec (map bean topologies)) but specify the exact fields i want
11:05	cshell	, ({:id (.get_id x)})
11:05	clojurebot	#<CompilerException java.lang.RuntimeException: Unable to resolve symbol: x in this context, compiling:(NO_SOURCE_PATH:0:0)>
11:05	ssideris	how about (vec (map #(select-keys (bean %) [:k1 :k2]) topologies))
11:05	cshell	({:id :a})
11:05	ssideris	but bean is a bit slow because of reflection I think
11:05	nillkill	yeah, i’d prefer not to use that
11:05	cshell	,({:id :a})
11:05	clojurebot	#<ArityException clojure.lang.ArityException: Wrong number of args (0) passed to: PersistentArrayMap>
11:06	nillkill	was just trying (vec (map (fn [topology] {:id (.get_id topology)})))
11:06	ssideris	so you can just do: (vec (map (fn [x] {:id (.get_id x)}) topologies))
11:06	justin_smith	,(map #(select-keys (bean %) [:namespace :name]) [:foo/bar :this/that :other :east/west])
11:06	clojurebot	({:name "bar", :namespace "foo"} {:name "that", :namespace "this"} {:name "other", :namespace nil} {:name "west", :namespace "east"})
11:06	cshell	ssideris: you have to pass an argument to the map if you’re using it as a function
11:06	justin_smith	nillkill: ^^ if you are just getting things from the bean
11:06	ssideris	cshell: I'm not
11:06	ssideris	cshell: and that's not what nillkill wants
11:07	ssideris	he's just confused by the #() syntax
11:07	justin_smith	ssideris: fair point about bean being slow
11:07	nillkill	the (fn [x] …) option works great
11:07	nillkill	yeah, i’m def confused about anonymous functions
11:07	nillkill	figured that would’ve been equivalent to (fn [x] …) in this case
11:07	nillkill	anyway, that works perfectly
11:07	nillkill	thanks ssideris, cshell and justin_smith
11:07	justin_smith	,(#(do {:name (.name %)}) :hi) there is also this
11:07	clojurebot	#<IllegalArgumentException java.lang.IllegalArgumentException: No matching field found: name for class clojure.lang.Keyword>
11:07	justin_smith	oops!
11:08	ssideris	nillkill: here it is with an anonymous function instead: (vec (map #(hash-map :id (.get_id %)) topologies))
11:08	justin_smith	,(#(do {:name (.getName %)}) :hi) this I mean
11:08	clojurebot	{:name "hi"}
11:08	ssideris	the literal {} syntax won't play well with #()
11:08	bbloom	,(macroexpand '#(inc %))
11:08	clojurebot	(fn* [p1__153#] (inc p1__153#))
11:08	bbloom	^^ that should make it quite clear
11:08	nillkill	yeah, was trying to read up on this http://stackoverflow.com/questions/2020570/common-programming-mistakes-for-clojure-developers-to-avoid
11:09	bbloom	,(macroexpand '(fn [%] (inc %)))
11:09	clojurebot	(fn* ([%] (inc %)))
11:09	nillkill	yep, that’s a lil tricky :)
11:09	bbloom	anonymous, single-expression fns are extremely common
11:10	nillkill	would you guys normally use #() in this case? or just (fn [x] …)? Just curious
11:11	bbloom	,(#(-> {:x %}) 5)
11:11	clojurebot	{:x 5}
11:11	bbloom	i've see that, which is both clever and horrifying :-P
11:11	ssideris	nillkill: depends, but I would definitely use (hash-map) and (vector) instead of {} and [] in an anonymous function
11:11	bbloom	but yeah, i'd probably write:
11:11	justin_smith	nillkill: fn nests, #() cannot, so I start with fn and then substitute #() where it can make things cleaner
11:11	bbloom	,(#(hash-map :x %) 5)
11:11	clojurebot	{:x 5}
11:11	nillkill	ahh makes sense, good point justin_smith
11:12	justin_smith	,(#(do {:x %}) 5)
11:12	clojurebot	{:x 5}
11:12	justin_smith	is that so terrible?
11:12	ssideris	justin_smith: when I see a (do) I usually immediately think that there are side-effects in the code, so it can be misleading
11:13	bbloom	agreed, do == side effects
11:13	bbloom	i'd much rather #(-> than #(do
11:13	visof	this.header = header translated to (set! (.this header) header) ?
11:13	justin_smith	there aren't many places a side effect would hide in there, but OK
11:14	ssideris	justin_smith: yeah, if it's a tiny {:x 5} there aren't many places, but you could have more
11:14	justin_smith	but considering -> and do are equally verbose, I can stick with ->
11:16	nillkill	thanks again guys
11:18	visof	how can rewrite this full method in clojure https://www.refheap.com/85218 ?
11:18	visof	using java
11:19	visof	java from clojure
11:19	visof	i did this but even not working https://www.refheap.com/85215
11:20	justin_smith	well, that's a start, but you need some more code at the bottom of plain-header-iterator
11:20	justin_smith	or wait no, you transcribed it wrong
11:20	justin_smith	the type and the function should not have the same name
11:21	justin_smith	and "this" is totally invalid there
11:24	visof	justin_smith: so how can i fix this sample?
11:25	justin_smith	quoting bblooom above: (deftype PlainHeaderIterator [header pattern pos])
11:25	justin_smith
11:25	justin_smith	(defn plain-header-iterator [header pattern] (PlainHeaderIterator. header pattern 0))
11:26	justin_smith	then you would put the rest of your code at the end of that defn
11:26	visof	i don't want to use PlainHeaderIterator. i need to modify it
11:27	justin_smith	OK, the version above is valid clojure code, the version in that refheap you last pasted is not
11:28	justin_smith	you may want to check out an introductory book like "Programming Clojure"
11:29	visof	ok
11:30	visof	justin_smith: cann't you help to rewrite this java code to clojure code but with only return first match not all
11:31	bbloom	visof: please forgive my directness, but nobody wants to write your code for you. you've got to at least show some basic effort to understand on your own before asking for help
11:31	visof	ok
11:34	ssideris	visof: the idiomatic way to do this sort of thing in clojure would be to use (lazy-seq), but this is slightly more advanced as a technique
11:35	ssideris	visof: but in essence, you'd have a lazy-seq that would return you triples on demand
11:41	coventry	My browser repl is working fine, but when I paste the connection string into the js console, I get "Blocked a frame with origin "http://localhost:61318" from accessing a cross-origin frame." Anyone come across this? I'm working from the mies-om template, serving it to localhost:8000 using python -m SimpleHTTPServer.
11:42	coventry	This is with austin 0.1.4 and clojurescript r2156.
11:47	cbp	You might be trying to do AJAX from a server that's different from the one youre querying?
11:48	cbp	probably from :61318 you have some ajax that tries to fetch from :8000
11:48	cbp	You'd have to enable cross-origin resource sharing on :8000
11:50	coventry	The crazy thing is, this doesn't seem to break anything that I've noticed so far. I'm bringing in a javascript library which could be trying to do that. I'll try taking it out.
11:52	CookedGryphon	BobSchack: I worked out the issue
11:52	CookedGryphon	BobSchack: I was binding [print-length 10] (.log js/console (str x))
11:53	CookedGryphon	BobSchack: which apparently results in that no implementation of protocol for string error, take out the binding print length and it works as expected
11:54	BobSchack	really that is weird behavior. It should probably get a ticket if that is reproducible
11:55	BobSchack	I get that too
11:56	CookedGryphon	BobSchack: yeah, fairly sure that's a bug. Is print-length implemented in cljs? I just tried it on clojurescript.net and get print-length not declared ^:dynamic
11:58	CookedGryphon	what did you try as your minimal example? And what version of cljs are you on? Do you want to file it or shall I?
11:58	BobSchack	(binding [print-length 10] (pr-str #js {:foo "bar"}))
11:58	BobSchack	is a minimal case
11:58	BobSchack	it only does it for map data structures
11:59	CookedGryphon	don't think you even need the #js, do you?
11:59	CookedGryphon	i was getting it on plain cljs data structures
11:59	BobSchack	ooop yep you can take out the #js and it still gets the error
12:00	BobSchack	I'm trying this out with version 2173
12:01	BobSchack	Could you file the bug?
12:01	bbloom	wishful thinking: does anybody know of a swing UI hex debugger that I can use to quickly inspect an nio ByteBuffer or similar?
12:02	coventry	cbp: I get the error even with the minimal changes necessary to use the browser repl with the mies-om template. https://www.refheap.com/85222
12:02	CookedGryphon	bbloom: bbloom I have a function that implements print string for a bytebuffer
12:03	bbloom	CookedGryphon: do you mind sharing? i've seen a few random things in my quick googling, but most are kinda awful
12:04	CookedGryphon	bbloom: 2 seconds I'll gist it
12:04	CookedGryphon	(no guarantees its any better than the other things you've seen though :P)
12:05	justin_smith	,(String. (.getBytes "hello"))
12:05	clojurebot	"hello"
12:05	bbloom	CookedGryphon: if not, i'll write a better one and share it with you :-P
12:05	CookedGryphon	bbloom: https://gist.github.com/AdamClements/9441ad39254b91a8718b
12:05	justin_smith	or do you not mean the kind of thing returned by getBytes?
12:05	CookedGryphon	is what I've been doing, you just need to print the ints as hex instead
12:06	bbloom	hm, ok. i'm looking for something more like a hexdump
12:06	bbloom	https://en.wikipedia.org/wiki/Hex_dump
12:06	CookedGryphon	yeah, I was using it for fairly small bytebuffers and just wanted them inline when i pprinted maps with them in etc
12:06	bbloom	yeah, my byte buffers are fairly large
12:07	bbloom	hence my original question for some kind of launchable hex editor. features like search would be greatly appreciated
12:08	cbp	coventry: I Guess it's probably an austin issue
12:08	CookedGryphon	BobSchack: just heading out for a bit, but I will file a bug. Just need to reset my jira password because I seem to have forgotten it!
12:09	BobSchack	CookedGryphon: thanks
12:19	bbloom	CookedGryphon: justin_smith: this seems to get the job done good enough to unblock me: https://gist.github.com/brandonbloom/4b8278edaafccb72ccc1
12:21	BobSchack	bbloom: just curious what are you working on that you need this for?
12:21	coventry	cbp: Yeah, maybe. Thanks for looking.
12:21	justin_smith	bbloom: hah, nice
12:22	bbloom	BobSchack: working with a binary format
12:22	cbp	So I have this thing where I query a database, create a promise and once the database responds i deliver the result on the promise. Which works but now I need to deliver partial results. What's the answer here? A lazy seq thing of delays?
12:23	arrdem	partial results?
12:23	coventry	core.async?
12:23	clojurebot	core.async is not Go
12:23	cbp	yes as in the database says here is a part of the result, come back to me when you want more
12:24	arrdem	Ah.
12:24	arrdem	Yeah... I'd say deliver a lazy sequence that has another agent/worker for the next thunk of the query
12:24	arrdem	as it's next
12:32	cbp	Yes that's it
12:33	cbp	(inc arrdem)
12:33	lazybot	⇒ 26
12:34	arrdem	yay, validation to go with the coffee!
12:34	ghaz	Anyone have an idea why calling enable-console-print! isn't allowing println to print to console in clojurescript any more?
12:44	amontalenti	I have a lein project where org.clojure/tools.cli is installed at latest (0.3.1) version. Yet, when I look at the "cli" namespace, I only see one function, "cli". When I check "lein deps :tree", it lists the correct version. Somehow, it seems like an old version is getting into my classpath. Anyone know how I can debug this situation?
12:45	technomancy	amontalenti: is it a plugin or a regular lein project?
12:45	amontalenti	technomancy, regular lein project, afaict
12:45	technomancy	you can check the :file metadata on the var to see where it's coming from
12:47	amontalenti	technomancy, I try (meta cli) on the namespace and I get "nil"?
12:47	llasram	amontalenti: Are you using speclj?
12:47	technomancy	try it on the var
12:48	amontalenti	technomancy, you mean like cli/cli? also nil
12:48	justin_smith	#'cli
12:48	justin_smith	#'cli/cli
12:49	amontalenti	technomancy, "clojure/tools/cli.clj"
12:50	technomancy	amontalenti: oh right, then call clojure.java.io/resource on that
12:50	amontalenti	=> (clojure.java.io/resource (:file (meta #'cli)))
12:51	amontalenti	#<URL jar:file:/home/pixelmonkey/.m2/repository/org/clojure/tools.cli/0.3.1/tools.cli-0.3.1.jar!/clojure/tools/cli.clj
12:51	amontalenti	actually looks legit to me, no?
12:51	technomancy	so you're using the version you expect, yeah
12:51	justin_smith	(-> #'cli meta :file io/resource) even
12:51	amontalenti	odd
12:51	technomancy	http://p.hagelb.org/mrfp.gif
12:51	amontalenti	haha, I appreciate the tips -- I'm new here.
12:52	technomancy	that one was for justin_smith
12:52	amontalenti	so, I guess if I'm insane, I could go unzip this jar, eh?
12:52	amontalenti	see what the heck is going on?
12:52	llasram	amontalenti: What do you mean that you only "see" the `cli` function?
12:53	llasram	Are the new functions not in the namespace?
12:53	amontalenti	llasram, exactly
12:53	justin_smith	amontalenti: many editors can open the jar without explicitly unzipping it
12:53	amontalenti	I run (require '[clojure.tools.cli :as cli]) and then cli/cli is all that's available (also confirmed with (ns-publics cli))
12:53	amontalenti	but parse-opts is supposed to be there, and a few others
12:54	amontalenti	I confirmed this by doing load-file on a copy-pasta'ed version of the same module from github
12:54	justin_smith	amontalenti: have you checked (ns-publics 'clojure.tools.cli) ?
12:54	amontalenti	technomancy, insanity -- I unzipped the jar and the parse-opts function is there.
12:55	amontalenti	justin_smith, yes: {cli #'clojure.tools.cli/cli}
12:56	amontalenti	fwiw, this is happening to someone else on my team, too, with same project -- so it's not just me :)
12:56	technomancy	you could check your classpath for collisions, though if resource claims to find the right thing you should be good; that's what the compiler uses
12:56	justin_smith	amontalenti: I wonder if you are getting a version that is aotd into another dep?
12:56	technomancy	ooooh
12:56	technomancy	I bet that's it
12:57	justin_smith	(dec aot)
12:57	lazybot	⇒ -1
12:57	technomancy	justin_smith: wouldn't that change the :file metadata on teh var though?
12:57	justin_smith	hmm...
12:57	justin_smith	I don't see how else you would be getting the wrong version, but that is definitely weird...
12:59	amontalenti	interesting technomancy, I dropped one of my dependencies (not tools.cli) and now i can see parse-opts
12:59	amontalenti	the dependency was apache storm 0.9.1
13:00	nillkill	i figured apache storm might be interfering…does the order of deps in project.clj affect things?
13:01	justin_smith	you can use an :exclusions clause on a dep
13:01	justin_smith	but that won't help if aot was the problem - in that case tell storm to stop aot compiling deps
13:01	amontalenti	haha, nice -- so looks like we have an upstream bug of sorts
13:01	amontalenti	OK
13:02	amontalenti	we'll file a ticket and see how that goes, we can probably live without the new version of tools.cli in meanwhile
13:03	amontalenti	technomancy, thanks for your help -- we're actually using lein for a Python interop project with Storm called streamparse you can check out -- https://github.com/Parsely/streamparse -- lein makes our lives much easier for this, so thanks for your great work on it!
13:03	technomancy	cool; glad it's (mostly) working for you
13:04	nillkill	you can expect more questions from amontalenti and myself :)
13:04	technomancy	hopefully you can stamp out the pernicious use of AOT
13:04	amontalenti	well, we'd be in a deeper classpath hell than this little problem without it
13:04	PigDude	what is the idiomatic way to make a function accept more than one type? like a function that operates on a byte array but can also accept a string and call .getBytes on it
13:04	PigDude	is it to pass the argument through another funciton, like ensure-byte-array?
13:04	technomancy	PigDude: if you have a large number of cases a multimethod is a good way
13:05	technomancy	if there's only two or three, something like ensure-byte-array is fine
13:05	PigDude	hm ok
13:05	PigDude	at that, how do i tell the difference between a byte array and a string?
13:06	technomancy	...?
13:06	justin_smith	,(string? (.getBytes "hello"))
13:06	clojurebot	false
13:06	PigDude	ok, thanks justin_smith
13:06	mdrogalis	cemerick: Can you tldr what Quilt is? :) Can't find a description anywhere.
13:07	justin_smith	,(= (class (.getBytes "hello")) (Class/forName "[B")) PigDude
13:07	clojurebot	true
13:07	PigDude	justin_smith: and that's just (instance? String)
13:08	PigDude	justin_smith: my background (js py erl) this sort of explicit class/bases testing is not so common
13:08	justin_smith	PigDude: yeah, but I find it more readable (every basic clojure type has a predicate like that)
13:08	PigDude	justin_smith: oh, i agree!
13:09	technomancy	just don't use clojure.core/list?
13:09	PigDude	why's that?
13:10	justin_smith	because many things you would consider a "list" are not things "list?" returns true for
13:10	PigDude	,(map list? [() {} #{} []])
13:10	clojurebot	(true false false false)
13:10	PigDude	looks normal to me
13:10	justin_smith	,(list? (cons :a (list :b :c)))
13:10	clojurebot	false
13:10	justin_smith	that's weird ^
13:10	technomancy	http://p.hagelb.org/lies.gif
13:10	technomancy
13:10	technomancy
13:10	PigDude	ok, that is weird
13:10	hyPiRion	,(list? (list* :a :b (list :c))) ; even better
13:10	clojurebot	false
13:10	justin_smith	,(class (cons :a (list :b :c)))
13:10	clojurebot	clojure.lang.Cons
13:11	PigDude	a wart@!
13:11	PigDude	:)
13:11	technomancy	anyone tells you there's a language that doesn't have them, you can refer to the previous gif
13:13	seangrove	technomancy: Stop trolling
13:14	technomancy	http://p.hagelb.org/scott-pout.png
13:14	seangrove	how can (rest ...) take 1ms in cljs...
13:14	seangrove	err, 2ms
13:15	seangrove	Time to try advanced compilation again
13:16	bbloom	seangrove: what are you taking the rest of?
13:16	manutter	quick hoplon question: I want to write a client that monitors log messages coming in over a message queue, with a scrollback of, say, 5000 lines. it seems like if I were going to use hoplon and castra, I'd be sending 5K lines of log entries over the wire every few seconds, since it transmits the full state every time.
13:16	manutter	Is that right, and is there a better way?
13:16	bbloom	seangrove: could be reading 30ish objects via chunking
13:16	seangrove	bbloom: Not sure, Just woke up and reading the flame graph from last night
13:17	mynomoto	manutter: there is a #hoplon channel. But you can manage the state anyway you want using hoplon and castra.
13:18	manutter	mynomoto: Thanks, didn't know about #hoplon, I'll move my question over there
13:19	seangrove	These people have to be stopped https://developer.mozilla.org/en-US/docs/Web/Guide/Performance/Using_web_workers
13:22	llasram	seangrove: ?
13:22	jcromartie	seangrove: as something I read today said: "A modern Web page is a catastrophe."
13:24	seangrove	llasram: The data is copied, not shared between web workers, in order to prevent you from accidentally shooting yourself in the foot because of concurrency issues. If GC is your problem, that's just madness. Serializing + deserializing perf hit as well. If you're using immutable datastructures, it's also just completely wasteful
13:25	seangrove	bbloom: Are games generally single-threaded?
13:25	llasram	Interesting
13:25	bbloom	seangrove: nope
13:26	seangrove	llasram: Also, transfeable objects. Completely destroys the idea of immutable data structures - "here's the data you need, and I can no longer use it here"
13:26	bbloom	seangrove: big titles usually have threads for at least gameplay, graphics, and networking
13:26	jcromartie	depends on the game
13:26	jcromartie	I'd say generally they are
13:26	jcromartie	if you were to sample the average video game
13:26	bbloom	jcromartie: that's simply not correct
13:26	arrdem	jcromartie: maybe your average 2d side scroller...
13:26	jcromartie	and the "average game" over time is a 2d side scroller :)
13:26	jcromartie	more or less
13:27	bbloom	the xbox 360, for example, has 6 cores, 5 of which are available to game engines... you basically have to be multi threaded
13:27	bbloom	well 3 cores, 2 threads per core
13:27	arrdem	well... if you don't multithread you've just shot yourself in the face performance wise for no reason.
13:28	seangrove	bbloom: Yeah, I was wondering, since maybe I was missing something fundamental about this web-worker concurrency model
13:28	llasram	I mean, the Atari 2600 didn't even have a separate graphics controller. Just the 6502 updating registers at the TV refresh rate
13:28	llasram	So totally single-threaded
13:29	arrdem	and that's fine when your render engine consists of xoring in 2d sprites
13:29	bbloom	even if you don't core your game multi-threaded, most modern games use at least one library like Havok which can do multithreaded physics
13:29	bbloom	s/core/code
13:29	jcromartie	An immense number of games have and are being made. Most of them are really simple.
13:29	jcromartie	That's all I'm saying.
13:30	jcromartie	The vast majority of modern 3D games, and especially AAA blockbusters are obviously multi-threaded.
13:30	bbloom	jcromartie: seangrove isn't interested in the long tail of random little games made, he's interested in the architecture of real time systems
13:30	jcromartie	But the 5000 HTML5 Tetris clones made today won't be.
13:30	jcromartie	:)
13:30	jcromartie	ok
13:30	jcromartie	got it
13:31	seangrove	jcromartie: Sorry, wasn't quite as obvious to me as it should have been ;)
13:34	bbloom	seangrove: anyway, games tend to pipeline multiple frames, rather than utilize significant intraframe parallelism
13:35	timothyw	Is there a Clojure lib for doing XML digital signatures?
13:36	mdeboard	http://docs.oracle.com/javase/7/docs/technotes/guides/security/xmldsig/XMLDigitalSignature.html ? :D
13:36	CookedGryphon	BobSchack: Bug filed: http://dev.clojure.org/jira/browse/CLJS-804 add any details you think I have missed
13:36	timothyw	@mdeboard thanks
13:43	ssswdon	is there a way to remove a key from a map that has no value
13:44	Morgawr	you mean a key that has no value?
13:44	ssswdon	yes
13:45	arrdem	,(doc dissoc)
13:45	clojurebot	"([map] [map key] [map key & ks]); dissoc[iate]. Returns a new map of the same (hashed/sorted) type, that does not contain a mapping for key(s)."
13:45	Morgawr	ssswdon: http://stackoverflow.com/questions/3937661/remove-nil-values-from-a-map this might be helpful
13:45	ssswdon	thanks
13:50	stompyj	I’m devising my own “keep it real” time architecture
13:50	stompyj	it uses culture sourced filtering
13:52	justin_smith	stompyj: it should have a #YOLO data constructor that throws a ShitJustGotTooReal exception
13:53	stompyj	hahahahahahahahahaha
13:54	roelof	hello, I have this definition : (def little-schemer {:title "The Little Schemer" :authors [friedman, felleisen]})
13:54	roelof	now i want to add a author to it
13:55	ssswdon	@Morgawr Oh yeah I am doing this in a macro, when ever I access the key it throws an exception https://www.refheap.com/85230
13:55	roelof	So I do http://pastebin.com/VjbpwX9B
13:55	justin_smith	ssswdon: & keys needs pairs
13:56	roelof	but now I see this error message : ArityException Wrong number of args (0) passed to: PersistentVector clojure.lang.AFn.throwArity (AFn.java:437)
13:56	ambrosebs	,(def little-schemer {:title "The Little Schemer" :authors [friedman, felleisen]})
13:56	clojurebot	#<CompilerException java.lang.RuntimeException: Unable to resolve symbol: friedman in this context, compiling:(NO_SOURCE_PATH:0:0)>
13:56	ambrosebs	,(def little-schemer {:title "The Little Schemer" :authors '[friedman, felleisen]})
13:56	clojurebot	#'sandbox/little-schemer
13:56	roelof	what did I do wrong or what did I misunderstood
13:56	ambrosebs	,(update-in little-schemer [:authors] conj 'ambrosebs)
13:56	clojurebot	{:title "The Little Schemer", :authors [friedman felleisen ambrosebs]}
13:57	roelof	oke, the whole file is this http://pastebin.com/6VbDJprx
13:57	ToxicFrog	roelof: ((conj schrijver new-author)) evaluates (conj schrijver new-author) and then calls the result with no arguments, which is probably not what you wanted.
13:57	ssswdon	justin_smith - I was just wondering if there is a way to filter out bad data in the macro
13:57	ToxicFrog	(assoc book :authors (conj schrijver new-author)) I expect would work, although using update-in is better.
13:58	justin_smith	ssswdon: the error is happening in the arg parsing, & keys will always require an even arg count, period
13:59	ssswdon	justin_smith - what if I changed the approach on the function signature like processing the params differently
14:00	roelof	ToxicFrog: when I only did (conj schrijver new-author) on (add-author little-schemer {:name "Gerald J. Sussman"}) I did get the right output. See => [{:birth-year 1944, :name "Daniel Friedman"} {:name "Matthias Felleisen"} {:name "Gerald J. Sussman"}]
14:00	roelof	ToxicFrog: I think the problem is somewhere in the assoc function but I do not see where
14:00	justin_smith	ssswdon: well you could not use & keys and take the args in some other way
14:01	ssswdon	ok. let me think about this a bit
14:02	justin_smith	one option would be to take multiple arities instead of keyword args
14:02	roelof	ToxicFrog: you right the extra () around the conj were the culprit
14:12	kevinfish	Hi everyone. Total clojure noob here. I'm trying the "try luminus" stuff on this page: http://www.luminusweb.net/ and I got this message: fish@spanker ~/work/clojure $ lein new liminus myapp
14:12	kevinfish	Failed to resolve version for liminus:lein-template:jar:RELEASE: Could not find metadata liminus:lein-template/maven-metadata.xml in local (/home/fish/.m2/repository)
14:12	kevinfish	any help?
14:15	PigDude	what is the function for a while look w/ let bindings?
14:15	PigDude	it was like if-let, but looping
14:15	amalloy	loop
14:15	PigDude	i thought there was something w/ let bindings, but like if-let, so if the binding is falsy it terminates
14:15	amalloy	kevinfish: you spelled "liminus" wrong. it's luminus
14:16	amalloy	PigDude: no
14:16	PigDude	hm ok
14:16	kevinfish	amalloy: ahh, thx :)
14:16	amalloy	you can't really write a while-let macro that's functionally pure, because the value it checks will never change
14:18	therik	PigDude: do loop?
14:20	PigDude	therik: not quite
14:20	TravisD	Anyone here use the Atom text editor?
14:23	justin_smith	TravisD: some folks on #clojure-social were complaining about it
14:23	TravisD	ah, maybe I'll move the conversation over there :)
14:43	seangrove	bbloom: js-obj bash-in-place approach is fast enough for now, able to move on to the next pieces. Probably drop down into straight-js for the next version, and then maybe... c => asm.js for the final version?
14:43	bbloom	seangrove: shrug
14:48	bbloom	seems like overkill
14:49	seangrove	Yeah, I hope so
15:01	bbloom	i'm really amused by this thread: http://lambda-the-ultimate.org/node/4950
15:01	bbloom	type theory addicts rediscovering the benefit of first-class interfaces
15:06	amalloy	it seems i don't know enough type theory to get the joke
15:07	ataggart	Anyone know off-hand why the EdnReader would complain about "No reader function for tag" despite data-readers containing the tag?
15:08	Bronsa	ataggart: the edn reader doesn't use data-readers
15:09	Bronsa	ataggart: you have to pass the data readers as an argument to the edn/read function
15:10	ataggart	orly!
15:10	ataggart	thanks, off to try it out
15:10	bbloom	amalloy: not a joke really
15:11	bbloom	amalloy: a "type class" is just a dictionary of methods, just like a protocol implementation
15:11	ataggart	"When not supplied, only the default-data-readers will be used." RTFM...
15:11	bbloom	amalloy: but b/c it's resolved at type level, there are restrictions on the polymorphic dispatch
15:12	bbloom	amalloy: by encoding your type class as a record, you're effectively creating an object-oriented thing you can pass around
15:12	bbloom	they then call this "value level programming" b/c they have this artificial bifurcation of their language in to the term and the type sublanguages
15:13	bbloom	instead of just having a single-level language to begin with
15:13	bbloom	which, btw, does not preclude static checking at all
15:13	bbloom	this is the actually interseting motivation for dependent types, rather than being able to check things like the length of a vector statically
15:16	PigDude	what is the threading function that stops on nil?
15:16	alejandro	PigDude some-> I think
15:17	PigDude	thanks alejandro :)
15:18	bbloom	tpope: seems like repeat.vim doesn't work for cpp anymore
15:19	Glenjamin	bbloom: if i'm following this correctly, equivalent concepts in clojure are passing around maps of functions, and reify ?
15:19	bbloom	Glenjamin: i won't say equivalent, but definitely related
15:19	Glenjamin	with most of the oddness of phrasing in the post coming from the need to describe type-check-time and run-time separately
15:19	bbloom	Glenjamin: objects basically are maps of functions
15:20	Glenjamin	depends what level of abstraction you're thinking at, but yeah, i guess so
15:21	bbloom	Glenjamin: it's a map of functions plus a data payload. what i'd call "interface passing style" in the linked blog post is basically passing the object's method table separate from the object's data values
15:21	bbloom	it's definitely simpler/preferable to have those be distinct to start with, but if you've already got a concept that glues them together, reify lets you just skip the data payload part
15:21	bbloom	modulo lexical closures, of course
15:21	Glenjamin	in my mental model, a class is a map of functions, an object is a map of values bound to a map of functions - but an interface is more like a set of keys
15:22	bbloom	yeah, you've got it right... i wasn't being clear when i said interface i meant it in the broader context of languages, not the java sense.... in the broader context a "first class interface" is basically a map of fns
15:23	Glenjamin	right, yeah
15:23	Glenjamin	i find my javascript looks a lot like this these days
15:23	Glenjamin	maps of functions with mostly implicit interfaces between components
15:24	Glenjamin	the comments here are interesting, mostly focusing on how to do efficient comparison when you don't know the real "type"
15:25	Glenjamin	anyway, i try not to think about type systems
15:25	bbloom	i think the comparison stuff is just an example of an interface for which there may be multiple definitions for any given type
15:26	Glenjamin	there's always the temptation to specialize when you know the concrete types
15:26	Glenjamin	breaks the abstraction a bit, but obviously tends to be faster
15:29	bbloom	it's not about perf, it's about semantics: are numbers ordered or do they have an ordering? what about users?
15:29	bbloom	numbers have a natural order, but you could imagine an alternative ordering (ie inverse order)
15:29	Glenjamin	mm, i see
15:29	bbloom	users can have many orders: by name, by id, by join date, etc
15:29	bbloom	hence sort and sort-by
15:30	bbloom	applies to much more than orders, but that's the canonical example
15:30	Glenjamin	so potentially reverse-int is a type, that overloads the comparison operators
15:30	bbloom	well, that's one way to look at it
15:31	Glenjamin	type GolfScore = reverseOrder<int> sorta thing
15:31	bbloom	something like that
15:32	bbloom	but the other way to think about it is type T is Ordered and there exists an Ordering on type T
15:32	bbloom	in scala for example: http://www.scala-lang.org/api/current/index.html#scala.math.Ordered and http://www.scala-lang.org/api/current/index.html#scala.math.Ordering
15:38	AWizzArd	Leiningen: Can I unlist specific files from :resource-paths?
15:38	AWizzArd	Have Leiningen not putting them inside a .jar?
15:40	llasram	AWizzArd: Check out `:jar-exclusions`
15:40	justin_smith	AWizzArd: do they need to be in a folder in the :resource-paths ?
15:40	AWizzArd	llasram: that’s probably it, thx
15:40	AWizzArd	justin_smith: I just want to exclude my externs.js from going into the server.jar
15:54	Glenjamin	does anyone know why "Only long and double primitives are supported" ?
15:54	gtrak	Glenjamin: there's no advantage to using ints on modern system.
15:54	gtrak	systems...
15:54	gtrak	and also the hashcodes don't line up.
15:55	Glenjamin	assuming a 64bit jvm, or just in general?
15:55	gtrak	not sure about 32, but definitely 64
15:55	jcromartie	that's too bad, reaelly
15:55	jcromartie	really
15:55	bbloom	modern x86 chips are like 80bits internally or something weird like that
15:55	gtrak	you can still use them, you're just going against the grain a little.
15:55	martinklepsch	whats the best way to get leiningen2 on ubuntu?
15:55	jcromartie	I don't lament the deprecation (more or less) of int
15:55	jcromartie	but the loss of the name
15:55	gtrak	martinklepsch: download the shell script and put it in ~/bin
15:56	Glenjamin	it let me hint ints in defrecord, but not on functions
15:56	Glenjamin	i guess i can see why that would work
15:56	gtrak	huh? I'd expect that to work.
15:56	Glenjamin	anyway, longs are fine, makes sense really
15:57	Glenjamin	sorry, ^int, not ^ints
15:57	Glenjamin	i did ^int more than once, forgot ^ints was a thing
15:57	martinklepsch	gtrak: isn't there some other way? find that cumbersome
15:57	justin_smith	perhaps the optimization layer that knows how to keep something unboxed doesn't really generalize to float / int and only does double / long
15:57	gtrak	I find that to be the easiest and most fool-proof way.
15:58	Glenjamin	i happen to know all of my numbers in this app are small enough to be short, and i'm loading loads of them
15:58	Glenjamin	but i guess if i really wanted to optimise to that level i'd use something else
15:58	justin_smith	it kind of makes sense - the point is that you are using a primitive datum instead of an Object, and an int doesn't provide any savings that a long would not given data layout
15:58	gtrak	martinklepsch: it'll already be on the path, you just might have to login again if the directory doesn't already exist.
15:59	justin_smith	Glenjamin: with ints[] you can definitely take advantage of that
15:59	justin_smith	but on a 64 bit machine, the smallest an isolated datum is going to be is 64 bits iirc
16:02	dbasch	Glenjamin: if you really need to optimize for space, you can pack them into byte arrays, even with delta encoding
16:03	Glenjamin	i think i'm ok for space at the mo
16:03	Glenjamin	got a few maps, roughly 7 million records
16:03	Glenjamin	with 3 longs in each
16:05	Glenjamin	i'm looking at optimising the arithmetic at the mo
16:05	Glenjamin	just got confused when i tried to annotate some ints
16:17	PigDude	what's the idiom for a string of repeating chars? it can't be this can it? (str (into [] (repeat n c)))
16:17	bbloom	,(apply str (repeat 10 \!))
16:17	clojurebot	"!!!!!!!!!!"
16:18	PigDude	thanks bbloom
16:19	expez	Why isn't :include-macros true the default?
16:19	bbloom	expez: b/c it throws an error if there is no matching macro file
16:20	expez	oh!
16:20	amalloy	Glenjamin: how sure are you that arithmetic on a short is faster than on a long?
16:20	Glenjamin	i'm not, i was thinking about space in that case
16:20	Glenjamin	but realistically, that's probably not an actual concern
16:21	amalloy	i apparently misunderstood "i think i'm ok for space" and "looking at optimizing the arithmetic"
16:21	Glenjamin	was thinking aloud a bit: maybe i could use shorts -> i'm probably ok for space -> back to looking at arithmetic
16:24	gfredericks	I've always been a bit hazy on which primitives actually save space
16:24	gfredericks	e.g., do booleans take 64 bits to store?
16:25	gfredericks	what about boolean arrays?
16:26	amalloy	technomancy: i'd just like to say i'm super pleased with user profiles, and your suggestion that i use my own "swank" profile which is only active when i jack-in. it's so nice to have no.disassemble and criterium always present but not even load them when doing, eg, lein run
16:26	justin_smith	gfredericks: I think any of them will take up 64 bits on their own just because data alignment. But in an array they will be much different.
16:26	justin_smith	"This data type represents one bit of information, but its "size" isn't something that's precisely defined."
16:26	justin_smith	http://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html
16:26	gfredericks	justin_smith: you know for sure that all primitive arrays are maximally compact?
16:27	justin_smith	gfredericks: I don't think java defines any such guarantee
16:27	Glenjamin	oh, i didn't event realise java had a short primitive!
16:27	technomancy	amalloy: yaaay
16:27	technomancy	http://p.hagelb.org/power.gif
16:27	amalloy	gfredericks: i was actually looking through the code for System/arraycopy recently. i can tell you that byte[]s, at least, are stored one byte each
16:27	justin_smith	gfredericks: but unlike the standalone value, which will be 64 bit aligned, the ones in the array can take up less space
16:27	Glenjamin	"The byte data type can be useful for saving memory in large arrays, where the memory savings actually matters. They can also be used in place of int where their limits help to clarify your code; the fact that a variable's range is limited can serve as a form of documentation."
16:27	amalloy	and of course this is for my particular jvm
16:27	gfredericks	amalloy: phew; byte[] is so common I'd be appalled by anything else
16:28	Glenjamin	i'm now dangerously tempted to change all these ^long fields to ^byte, they're all under 30
16:28	Glenjamin	gotta stop getting sidetracked on this
16:28	amalloy	Glenjamin: but ask yourself, why?
16:28	amalloy	the arithmetic on them is probably slower
16:29	Glenjamin	ah, good point
16:29	Glenjamin	arithmetic first, space later
16:29	gfredericks	when reading the jvm spec I learned that ints are first class, longs are second class, and shorts/bytes are third class; at least wrt the available bytecodes.
16:29	justin_smith	yeah, likely they get promoted to long before ops, then converted back again
16:29	Glenjamin	my current task is exploring optimisations that can be made be writing this process in clojure vs the current approach
16:29	gfredericks	who the hell knows what the jit does with da numbers
16:29	amalloy	justin_smith: that's certainly what clojure does. i don't know about on the jvm
16:30	amalloy	see https://www.refheap.com/6a808f3be0a0e1bcd16044b35 if you're curious
16:31	amalloy	(it does something similar even if you set unchecked-math)
16:32	Glenjamin	there's some stuff about this in https://www.youtube.com/watch?v=iQwQXVM6oiY
16:41	bjeanes	That was a great talk
16:53	{blake}	I cannot seem to figure out how to iterate over a set.
16:53	{blake}	Or how to convert it into a seq.
16:53	{blake}	Or whatever it takes to say "Do this for everything in the set."
16:54	llasram	,(map inc #{1 2 3 4})
16:54	clojurebot	(2 5 4 3)
16:54	{blake}	What have I done that this isn't working for me?
16:55	llasram	The only guess I have off the top of my head is "actually have something other than a set" :-)
16:55	llasram	Oh, or "have set, but set is empty"
16:55	{blake}	Yeah, gotta be. I sometimes...do things...to my REPL...that it never is right again after.
16:56	justin_smith	or you are mapping, but not using the results, so no action, because laziness
16:57	justin_smith	,(do (map println (range)) :done)
16:57	clojurebot	:done
16:57	Glenjamin	{blake}: got some sample code?
16:58	{blake}	Nah, I got it. I've redefined a function with a variable.
16:58	{blake}	It's actuall in the iloveponies Clojure course.
16:58	{blake}	It has you define "authors" as a function. Then later it defs "authors" as a set.
16:59	{blake}	Gotta be one of my top 10 worst Clojure errors, because for a moment, I think I don't know =anything=.
16:59	Glenjamin	eugh, (empty) returning nil is really annoying
17:00	Glenjamin	makes (transient (empty coll)) produce a confusing null pointer error when the data goes wrong
17:01	justin_smith	,(empty)
17:01	clojurebot	#<ArityException clojure.lang.ArityException: Wrong number of args (0) passed to: core/empty>
17:01	justin_smith	,(empty nil)
17:01	clojurebot	nil
17:02	Glenjamin	,(doc empty)
17:02	clojurebot	"([coll]); Returns an empty collection of the same category as coll, or nil"
17:02	nullptr	,(empty [])
17:02	clojurebot	[]
17:03	justin_smith	,(empty 42)
17:03	clojurebot	nil
17:03	nullptr	,(empty [nil])
17:03	clojurebot	[]
17:03	Glenjamin	,(empty (java.util.HashMap.))
17:03	clojurebot	nil
17:03	Glenjamin	or the fun one:
17:03	Glenjamin	,(empty (transient {}))
17:03	clojurebot	nil
17:10	sdegutis	Is there an extraordinarily better way to do this? (for [[k _] pairs] (get another-map k))
17:11	justin_smith	(select-keys a (keys b))
17:11	sdegutis	Precise! Gratitude!
17:12	amalloy	errr, that assumes the input is a map, and returns a map; sdegutis's original worked on a seq of pairs, and returned a seq of pairs
17:12	sdegutis	All these assumptions hold.
17:12	justin_smith	I assumed maps, yeah
17:12	sdegutis	Oh, but wait! They do not hold. Oh no.
17:12	sdegutis	Never mind.
17:13	sdegutis	I'll leave this code as it is.
17:13	amalloy	sdegutis: a more conservative simplification would be (map (comp another-map first) pairs)
17:14	sdegutis	I will try this out, thank you.
17:15	sdegutis	My data is structured such that I have a map whose keys are ordered via /another/ map, the second of which values can be sorted.
17:15	sdegutis	Thus my insanity.
17:15	Glenjamin	i also have a similar system
17:15	Glenjamin	although my lookup map is just a vector
17:16	Glenjamin	so its { sort-val => key } and { key => actual val } ?
17:41	rhg135	good afternoon everybody
17:42	sdegutis	What do you mean? Do you wish me a good afternoon, or mean that it is a good afternoon whether I want it or not; or that you feel good this afternoon; or that it is an afternoon to be good on?
17:43	technomancy	amontalenti: hey, just saw your bug report on storm.
17:43	cbp	rhg135: what is there important
17:43	technomancy	amontalenti: FWIW my suspicion is that it's not actually a version range but AOT that is problematic
17:43	technomancy	but I can't make head or tail of the storm git repo to tell what's going on there
17:43	rhg135	idk just being polite :D
17:43	technomancy	and I don't feel like figuring out how to comment on the apache jira to mention it there
17:45	gtrak	sdegutis isn't used to that
17:46	sdegutis	Sorry, we just recently read a book, that's all.
17:55	Glenjamin	anyone know if there's an equivalent to :test-selectors at the repl?
17:55	Glenjamin	can't seem to see it in clojure.test api docs
17:56	technomancy	Glenjamin: there's not; clojure.test is monkeypatched up the wazoo
17:56	gtrak	Glenjamin: you could always look at how lein does it.
17:56	gtrak	probably more trouble than it's worth :-)
17:56	technomancy	it's such a nuisance to get changes into clojure.test that everyone just hacks around it.
17:56	gtrak	staring at it now
17:57	technomancy	it's not good
17:57	Glenjamin	hooray for core
17:57	Glenjamin	where things cannot change, but everyone uses them
17:58	amalloy	sounds like a description of clojure: things never change, but it turns out changing things isn't important anyway
17:58	technomancy	There's Always alter-var-root!™
17:58	Glenjamin	more standard libraries in general
17:59	amalloy	it was an immutability joke, guys
17:59	amalloy	apparently not a good one, but it's too late to change it now
17:59	Glenjamin	hahha
17:59	technomancy	heh
17:59	gtrak	amalloy: my response did not change.
17:59	gtrak	except for this one. damn.
18:00	gtrak	We just have lossless change.
18:00	amalloy	you gotta always be on the lookout for immutability jokes
18:00	gtrak	more things change.
18:00	gtrak	with immutability.
18:01	gtrak	that's why there's GC pressure.
18:01	bbloom	amalloy: good save with the self-deprecating immutability joke
18:02	amalloy	no such thing as too many immutability jokes
18:02	hiredman	amalloy: yeah, if you don't pay close attention you may miss things never changing
18:13	whodidthis	whats the deal with hyphen and cljs, sometimes i get weird errors with file not found and stuff :( should i avoid names with hyphens in em
18:13	bbloom	whodidthis: you only need to be concerned with leading hyphens. otherwise, more info needed to help you debug
18:14	Glenjamin	bah, sort-of got test-vars working but it's really low level :s
18:14	Glenjamin	alter-var-root it is!
18:16	whodidthis	ive had some warnings before with hyphen names on cljsbuild but was working fine, now figwheel has some issue and suggests replacing hyphens with underscores. was just wondering if thats a common practice
18:26	bbloom	argh, how do you search for tickets about the ".." function
18:26	bbloom	i'm wondering if it is possible to type hint intermediate expressions in a .. chain
18:32	PigDude	does clojure.test have lazy tests? this makes it easy to build tests in other places. basically the runner knows the difference between a plain 'assert' and a 'lazy-assert' which is a function. so if the test fails, you get the correct line location
18:33	PigDude	used w/ macros, that is
18:33	PigDude	(i'm used to this in erlang's eunit)
18:34	technomancy	PigDude: clojure.test doesn't usually use assert
18:34	technomancy	try clojure.test/is
18:34	PigDude	it's made simpler because the test is data. which i can do w/ a macro, but didn't want to reinvent the wheel
18:34	PigDude	technomancy: is/assert/anything...
18:34	technomancy	I still don't get the distinction
18:34	PigDude	technomancy: so in eunit you have ?assertEqual and ?_assertEqual. the second macro gives you a function instead of a plain assertion
18:35	technomancy	you can call is anywhere
18:35	PigDude	like if clojure.test understood to run a function like #(is (= ...))
18:36	PigDude	maybe i am just seeing this from the erlang point of view, but right now my unit tests have lots of duplication
18:36	PigDude	is it common to create utility macros in unit tests to perform common comparisons and such?
18:36	technomancy	I think there's actually a multimethod underlying the implementation of the c.t/is macro
18:36	technomancy	so you can improve your reporting by adding a method body to that macro
18:37	gtrak	'is' kinda sucks, since file-and-line is at the point of definition.
18:37	gtrak	so you have to use macros, or throw exceptions.
18:37	technomancy	usually I try to keep the `is` call inside the deftest and have helpers return values to compare
18:37	gtrak	I thought about how to work around this limitation.. but it'd be kinda dirty.
18:38	PigDude	the feature's described on http://www.erlang.org/doc/apps/eunit/chapter.html , see "Underscore-prefixed macros create test objects"
18:38	amalloy	bbloom: i don't think you can
18:39	bbloom	amalloy: that's what i concluded, but i wanted to report a bug... but i don't know what to call that dopey function :-P
18:39	amalloy	but there shouldn't be a need to, right? if the inputs are hinted, the compiler can infer the types of intermediate results (unless you have a function returning Object that you happen to know will be, say, a List)
18:40	bbloom	amalloy: yeah, it's precisely that last case i had
18:40	bbloom	needed a downcast
18:41	amalloy	bbloom: trying to stick typehints in the middle of macroexpansions is pretty delicate anyway
18:41	PigDude	how do you prevent your tests frmo having lots of duplication? does somebody have an example? i was looking at clojure.test.generative but didn't need something that powerful
18:41	PigDude	also it seemed to be difficult to get working
18:41	amalloy	because the forms get torn apart and reassembled with ~@, without copying the metadata
18:42	amalloy	eg, (-> foo (.bar) ^List (identity) (.size)) might work, but then again probably it doesn't
18:44	PigDude	ah it looks like clojure.test/are is useful
18:47	m1dnight_	So I'll be doing my thesis on Clojure (and other languages)
18:47	m1dnight_	I'm so excited \i/
18:47	m1dnight_	\o/ even
18:47	bbloom	amalloy: it's ok, i just did some ugly verbose let shit & it feels appropriately java-ish
18:48	nullptr	bbloom: don't forget to wrap it up in a factory or two
18:49	bbloom	nullptr: way ahead of you
18:53	nillkill	quick question, i’m trying to disable all logging via (require '(clojure.tools [logging :as log])). I have a lein project with a /resources dir that contains log4j.properties and has log4j.rootLogger=OFF set yet i’m still seeing info logging come through, any ideas?
19:02	seancorfield	I think log4j.properties has to be in the classes/ folder?
19:03	technomancy	no, resources/ is fine
19:03	seancorfield	Hmm, ok, that's on the classpath?
19:03	nillkill	yeah it is
19:03	nillkill	just double checked
19:03	nillkill	ahh i think i may know
19:04	nillkill	project that i’m using may not be using log4j :)
19:05	seancorfield	That was going to be my second suggestion.
19:05	visof	,(str ""hello"")
19:05	clojurebot	#<CompilerException java.lang.RuntimeException: Unable to resolve symbol: hello in this context, compiling:(NO_SOURCE_PATH:0:0)>
19:05	seancorfield	Also, if "OFF" the right value? I thought that had to be a level, like FATAL?
19:05	visof	,(str "\"hello\"")
19:05	clojurebot	"\"hello\""
19:05	nillkill	think it’s using slf4j https://gist.github.com/msukmanowsky/61353bba590d256a740a
19:06	visof	is there away to convert ""hello"" to "\"hello\"" without needing to write \ ?
19:06	visof	,(escape ""hello"")
19:06	clojurebot	#<CompilerException java.lang.RuntimeException: Unable to resolve symbol: escape in this context, compiling:(NO_SOURCE_PATH:0:0)>
19:07	visof	,(str "\"hello\"" {\"})
19:07	clojurebot	#<RuntimeException java.lang.RuntimeException: Map literal must contain an even number of forms>
19:07	visof	,(escape "\"hello\"" {\"})
19:08	clojurebot	#<RuntimeException java.lang.RuntimeException: Map literal must contain an even number of forms>
19:08	visof	,(clojure.string/escape "\"hello\"" {\"})
19:08	clojurebot	#<RuntimeException java.lang.RuntimeException: Map literal must contain an even number of forms>
19:08	visof	,(clojure.string/escape "\"hello\"" {\\"})
19:08	clojurebot	#<RuntimeException java.lang.RuntimeException: EOF while reading string>
19:08	amalloy	visof: no, you cannot write ""hello"" and then do anything with it, because it is not a value
19:09	visof	amalloy: well, what i have dirty strings in a file and need to handle them?
19:09	nillkill	seancorfield: tried with log4j.rootLogger=ERROR, no difference
19:10	dbasch	nillkill: it’s probably not log4j, it could be another logger library such as apache commons logging
19:11	nillkill	dbasch: doesn’t seem like it from lein deps :tree https://gist.github.com/msukmanowsky/61353bba590d256a740a
19:12	seancorfield	nillkill: http://logback.qos.ch/translator/
19:12	dbasch	nillkill: [commons-logging "1.1.1"]
19:12	seancorfield	Note that as a result of this migration, log4j configuration files will no longer be picked up. If you need to migrate your log4j.properties file to logback, the log4j translator might be of help. For configuring logback, please refer to its manual.
19:12	seancorfield
19:12	seancorfield	that's assuming log4j-over-slf4j which I see in the dependencies
19:16	nillkill	dbasch & seancorfield: hmm tried a commons-logging.properties file as well as logback.xml, neither seemed to stop it
19:17	dbasch	nillkill: what does the output look like?
19:18	nillkill	dbasch: https://gist.github.com/msukmanowsky/61353bba590d256a740a
19:18	nillkill	sparsej just calls lein run under the hood
19:22	bankqian	ls
19:22	lazybot	bin boot data etc home lost+found media root selinux srv sys tmp usr var
19:22	amalloy	wow, lazybot ls'ed him right out of his shell
20:00	PigDude	why does taking from this sequence return the same things every time?
20:00	PigDude	,(let [printables (map char (range 33 127)) random-printables (repeatedly #(nth printables (long (rand (count printables)))))] [(take 10 random-printables) (take 10 random-printables)])
20:00	clojurebot	[(\K \/ \I \N \f ...) (\K \/ \I \N \f ...)]
20:01	amalloy	PigDude: sequences are immutable: they never change
20:02	bbloom	PigDude: it's random-printables that doesn't change
20:02	TEttinger	because random-printables is defined once, yeah
20:02	amalloy	if you want to randomly generate a different sequence, you need to start over with a new one, not re-read the same one
20:02	PigDude	what do i need to change to get a sequence of random characters i can take from?
20:02	TEttinger	you can make it a fn and call it
20:02	bbloom	change your (def random-printables ...) to (defn random-printables [] ...) and then call it each time (random-printables)
20:02	PigDude	bbloom: i see, i thought that taking from it caused the function to be called, but that makes sense i guess?
20:03	turbofail	it only runs the computation needed to generate a particular sequence element once
20:03	bbloom	PigDude: taking from it causes any lazy thunks to be called, but they are memoized & never called again
20:03	PigDude	i see
20:04	PigDude	that makes more sense :)
20:04	turbofail	that said if you need more random numbers you could always just take more elements from the sequence
20:04	TEttinger	,(let [printables (map char (range 33 127)) random-printables (fn [] (repeatedly #(rand-nth printables)))] [(take 10 (random-printables)) (take 10 (random-printables))])
20:04	clojurebot	[(\( \} \G \. \p ...) (\p \c \D \z \T ...)]
20:05	PigDude	oh, there's rand-nth, not bad
20:59	danneu	If I've defined (defmethod command :look), what's a simple way to make :l delegate to :look without passing through the `defmulti` dispatcher machinery?
21:01	amalloy	danneu: without passing through the dispatcher machinery? what does that mean?
21:02	amalloy	are you thinking something like this? (defn handle-look [args] ...) (defmethod command :look [args] (handle-look args)) (defmethod command :l [args] (handle-look args))
21:12	danneu	amalloy: is there a way to call the :look defmethod directly?
21:12	amalloy	no
21:17	ashtonkemerling	Afternoon folks.
21:18	danneu	yo
21:19	coventry	,(do (defmulti t identity) (defmethod t :foo [x] x) ((:foo (.getMethodTable t)) :bar)) ;; <- danneu. Pretty horrible, though.
21:19	clojurebot	:bar
21:19	ashtonkemerling	What the hell?
21:19	coventry	I'm committing perversions with clojurebot.
21:19	ashtonkemerling	Are you trying to break it?
21:21	danneu	coventry: great, thanks
22:35	bbloom	sigh hacker news upvotes a "lisp" that "compiles to c++" ... meanwhile, it's literally a transpiler so shallow that it has EXPLICIT RETURNS
22:36	jeremyheiler	lol
22:36	bbloom	i really need to blackhole news.ycombinator.com and save my sanity
22:36	jeremyheiler	i use lobste.rs
22:37	bbloom	i have an account there, but i forget it exists
22:37	bbloom	i still navigate to reader.google.com by accident a few times per week
22:37	jeremyheiler	haha
22:37	bbloom	my fingers hate my productivity
22:53	seangrov`	bbloom: But have yout not yet realized that really, c++ is just a bit of syntax mangling away from being a very pleasant platform - mind-bending semantics ignored?