#clojure – 2013-04-12

2013-04-12

00:01	brehaut	https://github.com/pufuwozu/fantasy-land/
00:14	ivan	too much interop will put the object adaptation industry out of business
01:01	asumu	Hi. Quick question. Anyone know why the "thrush" operators are called that? Google didn't help much.
01:03	asumu	Oh, maybe it's a reference to Smullyan's "To Mock a Mockingbird"?
01:04	technomancy	asumu: that's correct
01:09	asumu	technomancy: Thanks, that makes sense, given thrush := lambda a b. b a
01:10	technomancy	asumu: it's not quite the same since thrush in the book is a function and thrush in clojure is a macro, but that's getting pedantic.
01:11	technomancy	that said if you want to be pedantic you can read http://blog.fogus.me/2010/09/28/thrush-in-clojure-redux/
01:17	mullr	fogus/bacwn or martintrojer/datalog for in-memory catalog?
01:18	mullr	s/catalog/datalog/
03:22	`arrdem	is there a naming convention for lurking tmux/screen connections?
03:41	MrHus	Hi I'm using Cheshire for my json encoding and decoding. No I want to add a custom encoding for a Postgresql array. I have the following code:
03:41	MrHus	(add-encoder org.postgresql.jdbc4.Jdbc4Array
03:41	MrHus	(fn [array jsonGenerator]
03:41	MrHus	(let [sequence (seq (.getArray array))]
03:41	MrHus	(do
03:41	MrHus	(println sequence)
03:41	MrHus	(encode-seq sequence jsonGenerator)))))
03:42	MrHus	https://gist.github.com/MrHus/d3c385433943a7d57f6c
03:43	MrHus	However I get the following error: clojure.lang.ArityException: Wrong number of args (4) passed to: generate$generate
03:44	MrHus	I've used this as a reference: https://github.com/dakrone/cheshire#custom-encoders
03:44	MrHus	but don't understand what I'm doing wrong.
03:48	jjido	where is generate$generate defined? How many args does it expect?
03:48	MrHus	https://github.com/dakrone/cheshire/blob/master/src/cheshire/generate.clj#L111
03:49	MrHus	It expects 4 arguments
03:49	MrHus	https://github.com/dakrone/cheshire/blob/master/src/cheshire/generate.clj#L182
03:49	MrHus	encode-seq expects 2
03:49	MrHus	which calls generate
03:50	MrHus	but I don't know where date-format comes from
04:28	clgv	what do I do wrong if I have no autocompletion in the buffer with the sourcecode file in emacs? slime is running
04:42	rodnaph_	has anyone used lein-rpm with success? got any example projects you can link?
04:46	iartarisi	hi! is anyone using clojure-test-mode for emacs? How do I see the whole output of a failed test? (I only see the highlight in my code)
04:53	iartarisi	ah, stupid question, it's in the nrepl buffer
04:57	thm_prover	Is there any java library that will let me produce TeX style graphics?
04:57	thm_prover	(without calling TeX)
04:57	thm_prover	I want to create techncal illustrations in Java.
04:59	AimHere	I dunno what TeX graphics consist of; but batik will turn SVG into graphics
05:25	clgv	thm_prover: why not shell out to TeX? because of deployment?
05:26	thm_prover	I want animation
05:26	clgv	so?
05:27	thm_prover	calling tex to create 30fps seems rather unreasonable
05:27	thm_prover	unless you're implying that Tex supports animation itself
05:27	thm_prover	which would e awesome
05:28	clgv	thm_prover: your setup does not allow a pre-calculation of the animation graphics?
05:28	arrdem-lurkin	Computer says no, try "!bot help".
05:28	arrdem-lurkin	Computer says no, try "!bot help".
05:28	arrdem-lurkin	Computer says no, try "!bot help".
05:28	arrdem-lurkin	Computer says no, try "!bot help".
05:28	arrdem-lurkin	Computer says no, try "!bot help".
05:28	thm_prover	clgv: I want rela time animation.
05:42	nonuby	in the ns macro :require coupled with :refer is the same as :use with :only right?
05:42	arrdem-lurkin	Computer says no, try "!bot help".
05:56	gkunno	Is there a way to manage project dependencies like: [compojure "1.1.*"] or [compojure ">1.1.0"] so that i would always have the updated version
05:57	weavejester	gkunno: Not really. There's "[1.1.0,)" which will always get the latest version, but that includes snapshots.
05:57	gkunno	ok
05:57	weavejester	There's been some plans about having two clojar repos; one for snapshots and one for release versions
05:58	weavejester	But that hasn't happened yet to my knowledge
05:58	gkunno	that would be cool
05:58	weavejester	Maven's version range handling is pretty limited unfortunately, and Leiningen uses that behind the scenes.
05:59	gkunno	i been using composer for dependency management and its a really good tool
06:00	gkunno	(in php :/)
06:00	gkunno	well, leiningen seem really good too
06:00	gkunno	so much more included
06:02	CookedGryphon	Does anybody know of a decent clojure library for easily using the java 7 watcher service?
06:03	CookedGryphon	I want to check for file updates without polling, I found an awesome gist, but it doesn't seem to be packaged up anywhere
06:03	CookedGryphon	https://gist.github.com/moonranger/4023683
06:18	GR	Hiya. I've recently written a library of data structures that includes a 'vector' implementation similar to Clojure's and I've added a pair of new algorithms. Does that sound interesting to anyone?
06:19	GR	I'm not entirely sure it will work for other implementations, but it is very likely.
06:32	naeg	does (first lazy-seq) consume the whole lazy seq?
06:34	nbeloglazov	naeg: no, it consumes first chunk - 32 elements
06:36	naeg	so (first lazy-seq) == (take 1 lazy-seq) ?
06:38	nbeloglazov	no, (first lazy-seq) returns first element while (take 1 lazy-seq) returns sequence that contains first element. I think they both realize chunk of 32 elements from lazy-seq.
06:40	naeg	why is (first (drop-while ...)) much slower than (take 1 (drop-while ...)) then?
06:43	nbeloglazov	How do you compare them?
06:43	nbeloglazov	Actually (take ...) also returns lazy seq. So unless you realize it initial collection won't be realized.
06:45	naeg	nbeloglazov: with (time ...). (first ...) takes about 1msec whereas (take 1 ...) takes ~0.4msec
06:47	nbeloglazov	naeg: try (time (doall (take 1 ...))) so that sequence returned by take is realized
06:49	naeg	nbeloglazov: then it's the same, but I get the same result back with and without (doall ...)
06:52	naeg	is the time not correctly measured if I just do (time (take 1 lazy-seq))? like only the time to create the lazy seq and it is realized after the measurement and then I get the result?
06:52	nbeloglazov	Yes, exactly
06:52	naeg	I see, thanks
06:58	necronian	I have a function that uses (eval (symbol database)) to turn a string into my korma database object. It works when I call it from inside the namespace the function is defined in. But not from another namespace.
06:58	necronian	I don't understand why.
07:05	hyPiRion	,((-> $ #(* % (({() {(+) ()}} % $) (- % (*))))) 10) ;; new factorial in swearjure
07:05	clojurebot	3628800
07:05	hyPiRion	A shorter variant, which is amazing
07:17	otfrom	morning all
07:17	otfrom	does anyone have any suggestions for parsing very large json arrays?
07:18	otfrom	cheshire's parse-seq is a bit too greedy and I'm wondering if I'm missing something before I start coding up something myself
07:21	CookedGryphon	otfrom: depending on the data, quite how large it is and what you want to do with it, have you considered importing it into mongo? That can read json directly, and you could then do advanced queries on the data contained
07:22	CookedGryphon	i don't know how you'd keep the insertion order trivially though
07:22	CookedGryphon	but if you didn't care about the order, you could then pull things out lazily through congomongo
07:22	otfrom	not too fussed about the insertion order
07:23	otfrom	I'd thought about mongo as a possibility. It feels a bit like just relying on mongoloader or similar to do the lazy parsing of the json array.
07:24	CookedGryphon	yeah, it depends what you want to do with it really, if you're only going to scan through and read this array once, then mongo would be a bit of a ridiculous way to do it,
07:24	CookedGryphon	but if it's a dataset you're going to look at a few times, it might be a more convenient way of storing it
07:26	otfrom	I'm just going to scan it once, but I am going to get a new array each day
07:27	CookedGryphon	hmm, yeah you don't want to be doing a manual import every day
07:27	CookedGryphon	i take it there's no way to get a stream instead, parse the data as it comes in?
07:28	CookedGryphon	and use storm or something to set up a pipeline
07:28	robewald	Hello, I am trying to use the clojurescript js->clj function on an domina event object and I just get back the js object instead of a map.
07:29	CookedGryphon	otfrom: anyway, i gtg, good luck
07:29	robewald	the culprit seems to be that line in core/js->clj: (indentical? (type x) js/Object) which is false although I would expect it to be true.
07:30	robewald	Any clues?
07:46	cmdrdats	hey guys, in compojure, I'm trying to see from middleware what route matches.. is that even possible?
07:56	Glenjamin	cmdrdats: i don't think so, unless the app, records that in the response
07:56	cmdrdats	ok - I'm putting together a workaround, using clout the same way as compojure.. was hoping there would be a more direct way :/
07:57	Anderkent	Hey, how can I avoid a lot of quote-unquote when writing an anaphoric macro? Example: https://www.refheap.com/paste/13552
07:57	cmdrdats	hating the fact that compojure returns black-box functions instead of data structures from POST / GET and defroutes
07:57	Anderkent	i.e. I don't like how I have to quote-unquote the argument symbols all the time
07:58	Glenjamin	cmdrdats: why do you need this info in the middleware?
07:58	cmdrdats	I need to do authentication based on the matching route
07:58	hyPiRion	,(let [it 'it] `(+ ~it 4))
07:58	clojurebot	(clojure.core/+ it 4)
07:58	hyPiRion	like that, Anderkent?
07:59	Anderkent	hm, guess that is better, thanks
07:59	weavejester	cmdrdats: That's the disadvantage of function composition; it's very black-box. I've been meaning to write another routing library based on a data structure; less flexible, but more transparent
07:59	Glenjamin	cmdrdats: there are some patterns for wrapping up groups of routes behind authentication middleware
07:59	weavejester	cmdrdats: However, if you need to do authentication on the matching route, why not apply the authentication directly to the route itself?
08:00	weavejester	So some routes have the authentication middleware on them, and other routes don't.
08:00	cmdrdats	weavejester: you mean, inside the actual endpoint function? I'm kinda wanting to keep those clean from authentication logic
08:00	cmdrdats	so that I can't get it wrong in the future
08:00	weavejester	cmdrdats: No, I mean, divide up your routes into those that need authentication and those that don't.
08:01	Glenjamin	(require-auth (defroutes admin ...)) and (defroutes public ...)
08:01	weavejester	The disadvantage of using functions is that they're more opaque, but the advantage is that you can arbitrarily nest middleware.
08:01	cmdrdats	weavejester: oh, no - mine requirement is more finegrained- one user can have access to one route, but not another user
08:02	cmdrdats	weavejester: wouldn't it be feasible to return data structures from the defroutes, POST, GET, et al macro's
08:02	weavejester	cmdrdats: Ohh, okay, and there's no way of grouping that? e.g. Friend allows you to label certain routes as needing certain access roles.
08:02	weavejester	cmdrdats: Well, no, because then you couldn't apply middleware to routes.
08:02	cmdrdats	and then just make handler/site build the black-box functions
08:03	weavejester	cmdrdats: That would mean you could only apply middleware at the top, and you couldn't use higher-level functions to generate routes.
08:03	weavejester	There's a big advantage to using functions
08:03	cmdrdats	ah, ok
08:03	weavejester	But it trades off against transparency
08:04	cmdrdats	what I've done is write a wrapper macro for my routes now
08:04	weavejester	Ideally we need two libraries; one for routing via a data structure, with all the limitations that has, and one for routing via functions.
08:04	Glenjamin	i wonder if you could get somewhere by just using compojure.core/routes
08:04	wei_	(??? [1 2 3 4 5 6 7] [true false false false true false true]) => [1 5 7]
08:04	cmdrdats	which I can then eval to create the actual compojure routes
08:04	Glenjamin	wait no, thats reutrns a function, ignore me
08:04	snrmwg	does anyone here know and/or use sqlkorma?
08:04	weavejester	But it kinda seems strange that you're doing authentication directly against the routes
08:05	weavejester	And not assigning roles to sets of routes.
08:05	cmdrdats	weavejester: I'm exposing an API, the API key gets assigned a set of routes
08:06	cmdrdats	I can later on put grouping on top of it, but for simplicity, I'd rather leave that seperate
08:06	Glenjamin	can you just tie the auth to URLs in the middleware layer?
08:06	Glenjamin	like with http://yogthos.github.io/lib-noir/noir.util.middleware.html#var-wrap-access-rules
08:07	cmdrdats	ye, that's what I'm doing
08:07	cmdrdats	Glenjamin: but directly with things like "/item/:id"
08:07	cmdrdats	that doesn't match the url "/item/123", unless you run the routing through the same logic as compojure
08:08	tomoj	you can implement a mind reader with nominal logic https://www.refheap.com/paste/ae34df589f4d62e47d771591e
08:08	cmdrdats	which, incidentally, I've just finished doing :P I just compiled all the routes myself using clout like compojure does
08:09	Glenjamin	right, i'm with you now - you want to check auth after the route's been composed, but before the function is evaled
08:10	snrmwg	how can i write a query with sqlkorma where i have different limits dependent on my query parameters? i.e. without any parameter i want max 100 rows, with parameters i want max 20 rows
08:10	cmdrdats	Glenjamin: yep
08:16	cmdrdats	Glenjamin, weavejester: https://www.refheap.com/paste/13554 - the pieces I needed to get it to work :)
08:17	cmdrdats	not including the actual middleware, but that should be fairly obvious
08:26	Glenjamin	heh, that's really hard to follow!
08:28	cmdrdats	xD - I'm just creating a list of symbols out of my routes, then compiling that with clout into 'compiled', into a route => compiled map
08:28	Glenjamin	yeah
08:28	Glenjamin	you still end up searching the routes twice per request
08:28	cmdrdats	ye, totally
08:28	Glenjamin	it might be easier to just add an assert-style form in each route
08:28	Glenjamin	maybe hide that behind a macro
08:29	cmdrdats	you mean, route it through an implicit function
08:30	Glenjamin	(authed-route GET "/blah/:id" [id] body) => (GET "/blah/:id" [id] (check-auth "/blah/:id" [id] body)
08:30	cmdrdats	ye, that's a good idea
08:31	cmdrdats	and not use strict 'middleware' for the auth
08:32	Glenjamin	especially if you end up looking up the :id against the DB for the auth
08:32	cmdrdats	ye - it also addresses mixing auth'd and non-auth'd functions properly
08:32	cmdrdats	routes*
08:34	Glenjamin	aha, there's a generalised version of this concept in express
08:34	Glenjamin	http://expressjs.com/api.html#app.VERB
08:35	Glenjamin	hrm, it's actually just ->
08:36	cmdrdats	haha
08:37	Glenjamin	(GET "/blah/:id" req (-> req check-auth normal-handler))
08:37	Glenjamin	except you lose the compojure sugar for route param destructuring
08:38	Glenjamin	or maybe it's more like http://expressjs.com/api.html#app.param - which compojure doesn't have an equivalent of afaik
08:38	Glenjamin	anyway, gotta go - good luck!
08:39	cmdrdats	thanks :)
08:47	Anderkent	Idiomatic way to check if a map has given keys and they have truthy values? I came up with (every? true? (juxt :key1 :key2 :key3) map) ...
08:48	Anderkent	(missed parens around juxt and map there)
08:50	arcatan	Anderkent: (every? map #{:key1 :key2 :key3})
08:51	AimHere	Note also that true? doesn't just pick truthy values, it demands actual truth
08:51	AimHere	truthiness doesn't cut it for the likes of true?
08:51	AimHere	,(true? "true)
08:51	clojurebot	#<RuntimeException java.lang.RuntimeException: EOF while reading string>
08:51	AimHere	,(true? "true")
08:51	clojurebot	false
08:52	arcatan	,(every? {:a 1, :b nil} #{:a})
08:52	clojurebot	true
08:52	arcatan	,(every? {:a 1, :b nil} #{:a :b})
08:52	clojurebot	false
08:52	arcatan	,(every? {:a 1, :b nil} #{:a :c})
08:52	clojurebot	false
08:52	arcatan	yay.
08:52	Anderkent	oups
08:52	Anderkent	thank's for that
08:53	dpathakj	re
08:53	Anderkent	,(every? identity ((juxt :a :b :c) {:a 1 :b 2 :c 3}))
08:53	clojurebot	true
08:53	Anderkent	... I created a monster
08:53	Anderkent	,(every? identity ((juxt :a :b :c) {:a 1 :b 2 :c nil}))
08:53	clojurebot	false
09:01	auastro	hey all
09:02	auastro	any of the clojars maintainers around, I need to get my account name changed
09:02	auastro	?
09:04	auastro	anyone alive down here?
09:13	Anderkent	auastro: I guess the clojars issue tracker is your best bet (that's what they want for deletion request or group name takeovers), though why not just make a new account and transfer your group names to that account?
09:15	auastro	Anderkent: thanks, I've emailed the contact email twice now, I'd prefer not to put it on the issue tracker, kind of embarrassing actually, put my password in the username field :/
09:15	Anderkent	Ah :P
09:15	auastro	Australian? or just up late?
09:15	Anderkent	European, ain't late here
09:16	Anderkent	anyway technomancy or xeqi might be able to help you
09:16	auastro	I see, we are something like +10 here so it's about lunch time where you are?
09:16	auastro	what tz are they in?
09:16	auastro	US probably
09:17	Anderkent	Afraid so
09:18	auastro	hmm, well let's hope they respond to my email this time.
09:18	auastro	I'm not quite sure why they don't just have a way to delete an account, isn't that like a reasonably important feature?
09:19	Anderkent	not really, and it could get quite confusing since your published artifacts would not get deleted
09:19	borkdude	auastro I tried to change something in clojars once, never got a reply
09:20	auastro	Anderkent: I don't have any published artefacts
09:20	auastro	borkdude: :(
09:22	llll	how do i apply modifier key on regexp?
09:23	auastro	llll: sorry don't understand the question
09:23	llll	eg. i want to use "g" for global
09:25	llll	(re-find #"rabbit" "follow the white Rabbit")
09:26	llll	or i for case insensitivity
09:28	Anderkent	you can embed flags with (?<flag>) : ,(re-find #"(?i)aabb" "AABB")
09:28	Anderkent	,(re-find #"(?i)aabb" "AABB")
09:28	clojurebot	"AABB"
09:28	Anderkent	but not sure how to pass them in otherwise
09:29	llll	Anderkent: thank you
09:43	llll	i am getting an error using cljs
09:43	llll	I'm using ((re-find #"(?i)^.?<body[^>]>(.?)<\/body>.?$" html) 1)
09:44	llll	Parse error. invalid flag after regular expression
09:44	llll	here is the compilation of the code: cljs.core.re_find.call(null,/^.?<body[^>]>(.?)<\\/body>.?$/i,p1__24321_SHARP_)
09:45	llll	the error marker is on the first / after null
09:46	Anderkent	Am I right in thinking that the \\/ makes the regex end prematurely and thus it tries to interpret /body as flags?
09:46	Anderkent	otherwise, sorry, I know nothing about clojurescript
09:50	llll	i should just run js in cljs
09:51	llll	how do i eval js in cljs?
09:52	noidi	I know this is a bit unhelpful, but you shouldn't be parsing html using a regular expression in the first place :) http://stackoverflow.com/a/1732454/13340
09:53	llll	but then how do jquerymobile do it :/
09:54	hyPiRion	llll: You should try to parse stuff with instaparse
09:54	dsapala	llll: he didn't say it couldn't be done
09:54	hyPiRion	it's going to be vastly more readable, and you get more power
09:55	rbxbx	llll why don't you just use something like enfocus?
09:57	jjl`	one presumes they built a real parser
09:57	jjl`	(which is the correct way to do it)
10:01	llll	rbxbx: its a jquery replacer?
10:02	rbxbx	llll no, there is https://github.com/ibdknox/jayq to that effect though.
10:03	AimHere	You should parse html by search/replacing angle brackets to round ones, then writing a macro and running 'eval' on it
10:06	hyPiRion	AimHere: read-string only, not eval
10:06	hyPiRion	Eval is for evaluating data
10:06	AimHere	Fair point
10:07	AimHere	Though why not just booked the string you're reading with "(eval " and ")", for added awesome
10:07	AimHere	*bookend
10:08	ToBeReplaced	what do people use for logging inside of threading macros? something better than creating an anonymous function that takes in an arg, does logging based on that arg, and returns the arg?
10:09	silasdavis	I'm trying to require this: https://github.com/ring-clojure/ring/blob/master/ring-core/src/ring/util/request.clj
10:10	silasdavis	with this in my (ns ...) block: [ring.util.request :as req]
10:10	silasdavis	but it can't find it
10:10	rbxbx	ToBeReplaced you could use `doto`, I'm not sure if that's conventional though.
10:10	silasdavis	[ring.util.response :as resp] works fine
10:11	silasdavis	I've got [ring/ring "1.1.8"] dependency and lein-rint 0.8.2 plugin if that matters
10:12	ToBeReplaced	rbxbx: that's cute!
10:13	weavejester	silasdavis: You're using a Ring 1.2.0 namespace but your ring version is 1.1.8
10:13	bhenry	silasdavis: [ring/ring-core "1.1.8"]
10:13	rbxbx	ToBeReplaced remember, one should always write cute & clever code. It's the road to longevity.
10:13	bhenry	eehh...
10:14	ToBeReplaced	of course
10:14	bhenry	1.2.0-beta2
10:15	silasdavis	weavejester, which part is the ring 1.2.0 bit?
10:16	weavejester	silasdavis: The namespace "ring.util.request" was only added in 1.2.0
10:16	weavejester	silasdavis: You're using Ring 1.1.8, which doesn't have that namespace
10:17	bhenry	silasdavis: https://github.com/ring-clojure/ring/tree/1.1.8/ring-core/src/ring/util here's what you have available.
10:18	silasdavis	ahh, thanks. It seems that friend relies on 1.2 then
10:33	otfrom	in a repeat from earlier: does anyone know a good way to parse huge json arrays? (about 1.5gb)
10:34	otfrom	cheshire.core/parsed-seq seems a bit too eager
10:34	dakrone	otfrom: how so?
10:35	otfrom	my json looks like this (ish): [{"foo" : 1}, {"foo" : 2}...]
10:35	otfrom	so calling first on parsed-seq gives me the whole array
10:35	xeqi	borkdude: what did you need changed in clojars? I might have missed the request
10:36	zamaterian	otfrom, maybe https://github.com/mmcgrana/clj-json/blob/master/src/clj/clj_json/core.clj#L43 can do the trick ?
10:36	dakrone	otfrom: so, parsed-seq returns a sequence of objects, in your example you have only a single object
10:37	dakrone	zamaterian: that's the same basic implementation
10:37	otfrom	dakrone: basically, yes
10:38	borkdude	xeqi https://www.refheap.com/paste/13560
10:38	borkdude	xeqi november 2011 ;)
10:38	dakrone	otfrom: so in order to take advantage of laziness, you'll need to separate the one object into separate objects
10:39	xeqi	borkdude: ah, before my time then :p now I should only feel bad about missing auastro's
10:39	otfrom	dakrone: I'm guessing that is outside of what cheshire does
10:40	borkdude	xeqi deleted the message again
10:40	xeqi	borkdude: still want it removed?
10:40	borkdude	xeqi yes
10:40	borkdude	xeqi nobody is using it anyway
10:40	xeqi	borkdude: done
10:40	borkdude	tnx
10:41	otfrom	zamaterian: thx. I'll look at that too
10:41	dakrone	otfrom: for example: (first (parsed-seq (StringReader. "{\"foo\":1}\n{\"bar\":2}"))) returns {"foo" 1}
10:42	dakrone	otfrom: if you want recursive laziness, I don't know of any JSON parser that does that yet
10:42	borkdude	xeqi I thought it was better to just use org.clojars.borkdude
10:43	otfrom	dakrone: thx. That was what I was finding from reading and testing things and I was wondering if I was missing something.
10:44	otfrom	dakrone: sounds like I need the json equivalent of a SAX parser.
10:46	dakrone	otfrom: it's a neat idea and would be cool to have a lazy-tree of json parsings
10:46	otfrom	dakrone: perhaps one of those new parser libraries... ;-)
10:47	zamaterian	otfrom, clj-json uses jackson for parsing. jackson does support stream parsing see : http://wiki.fasterxml.com/JacksonInFiveMinutes#A.22Raw.22_Data_Binding_Example
10:47	dakrone	zamaterian: cheshire uses jackson also, and cheshire's stream parsing is the same implementation
10:47	dakrone	since it was originally based on clj-json
10:48	dakrone	otfrom: yea, would have to be an optional thing though, since it would not perform as well (but would be better for memory usage)
10:53	otfrom	dakrone: yep
11:10	mklappstuhl	A few friends of mine and I would like to crunch some numbers and financial market seems to provide lots of room to get creative... whats the best datasource thats out there for this kind of stuff? I guess parsing CSVs from Yahoo isnt it
11:13	nDuff	mklappstuhl: Hrm. There's a startup here in Austin that specializes in just that kind of thing (assembling datastores, whether publicly available or otherwise), but their name escapes me at the moment.
11:16	gfredericks	w00h00, I think my ->/->> patch will get into 1.6
11:17	the-kenny	http://clojure.org/lisps says "In Clojure nil means 'nothing'. It signifies the absence of a value, of any type, and is not specific to lists or sequences.". (get {:a nil} :a 1) returns nil. Shouldn't the not-found value (1) kick in, as 'nothing' can obviously not be found (e.g. ":a doesn't map to anything")
11:17	bbloom	gfredericks: it sems like Rich is on JIRA duty today :-P
11:20	CookedGryphon	the-kenny: yeah, but they key exists and can be found, just the thing that's been put in that placeholder is nothing
11:20	gfredericks	ha
11:20	the-kenny	Hm
11:22	ppppaul	can someone give me pointers on making pretty walk functions
11:27	bbloom	ibdknox: damn you and your lighttable stealing some of my file associations!
11:28	mdeboard	ppppaul: Walk what? file paths?
11:38	TimMc	gfredericks: Oh no, we were gonna use that bug for Swearjure! I think.
11:40	TimMc	gfredericks: I think clojure.template may help with the problem that caused me to want inner-macros.
11:41	TimMc	(The #=(arity 3) thing.)
11:42	borkdude	,(= 3 3.0) ;; nice
11:42	clojurebot	false
11:43	TimMc	,(== 3 3.0)
11:43	clojurebot	true
11:44	borkdude	ah cool
11:45	borkdude	$findfn 3 3.0 true
11:45	lazybot	[clojure.core/== clojure.core/not= clojure.core/distinct? clojure.core/>= clojure.core/<=]
11:49	clgv	http://starlogs.net/#clojure/clojure
11:53	TimMc	I tried using this autodoc thingy, but it doesn't seem to work! I guess I'll have to go back to writing my docstrings by hand.
11:53	TimMc	False advertising, I tell you.
12:03	S11001001	too bad we can't infer core.typed toplevel term types
12:03	S11001001	then could generate free theorems from them and call those autodocs
12:07	TimMc	S11001001: hyPiRion used your -> idea to come up with a factorial fn one-liner that can be passed around. Very cool.
12:08	S11001001	TimMc: great, one step closer to taking over all clojure dev
12:09	TimMc	The trick should work for all simple-recursive fns.
12:10	TimMc	Still no closures.
12:10	ppppaul	mdeboard, clojure.walk/prewalk postwalk
12:11	ppppaul	wondering about idioms for those functions
12:17	DerGuteMoritz	what's a good way to have some dirty unsafe mutable place? currently I'm using an object-array with one slot which works but feels a bit clumsy :-)
12:17	ppppaul	huh?
12:17	DerGuteMoritz	huh!
12:18	ppppaul	DerGuteMoritz, you could use an atom
12:18	ppppaul	sometimes a var is ok
12:18	DerGuteMoritz	yeah well that's safe and clean :-)
12:18	DerGuteMoritz	I don't want any synchronization etc.
12:18	ppppaul	dynamic var is dirty
12:18	DerGuteMoritz	no thread-safety
12:18	DerGuteMoritz	ah, can I set! a dynamic var? I thought I couldn#t
12:19	ppppaul	(bindings [my-dirty-var new-value] my-fn)
12:19	DerGuteMoritz	ah no I need to mutate it
12:19	DerGuteMoritz	it's a variable I close over in a proxy
12:20	ppppaul	you can do with-redefs
12:20	DerGuteMoritz	unlike deftype, proxy doesn't provide a way to add attributes
12:20	ppppaul	maybe alter-var (though i haven't had success with that)
12:20	DerGuteMoritz	with-redefs also only affects the body
12:20	DerGuteMoritz	yeah, alter-var-root would work
12:20	ppppaul	you can do (def thing 1) (def thing 2)
12:21	DerGuteMoritz	ppppaul: it's a local variable I close over, not a global var
12:21	ppppaul	oh
12:21	DerGuteMoritz	I could perhaps instantiate clojure.lang.Var or something
12:21	ppppaul	lol
12:21	DerGuteMoritz	but that doesn't seem much better :-)
12:21	ppppaul	you are doing crazy things
12:22	DerGuteMoritz	yeah, just a little friday afternoon goofing around
12:22	ppppaul	alter-var-root ftw
12:23	DerGuteMoritz	well, alter-var-root involves a function call!
12:23	DerGuteMoritz	I mean one more than my current aset approach
12:25	DerGuteMoritz	,(let [x (clojure.lang.Var/create 1)] @x)
12:25	clojurebot	1
12:25	DerGuteMoritz	that even works heeh
12:25	ppppaul	,(let [x (clojure.lang.Var/create 1)] x)
12:25	clojurebot	#<Var: --unnamed-->
12:26	DerGuteMoritz	yep! :-)
12:26	ppppaul	woah
12:26	ppppaul	this is new to me
12:27	ppppaul	time to make a blog and show people how to program in clojure just like they do in their language of choice
12:27	DerGuteMoritz	too bad it just was april first
12:28	ppppaul	going to have to wait a year
12:28	ppppaul	so, you should start writing and not release anything until next april first
12:29	ppppaul	they you can have lots of interesting topics, like clojure for c++ users, without any of the benefits of using clojure at all. hack in some text macros too
12:29	ppppaul	clojure preprocessor is best preprocessor
12:31	S11001001	ppppaul: When you bind a value, you have to supply an expression that "destroys" it for when it goes out of scope.
12:31	TimMc	,(let [b (clojure.lang.Box. 5)] (set! (.val b) 42) (.val b))
12:31	clojurebot	42
12:32	ppppaul	woah
12:32	ppppaul	this code is making my eyes hurt
12:35	TimMc	I'm having trouble writing a templating macro: https://gist.github.com/timmc/5373281
12:36	TimMc	I want to write a deftype that has nearly the same body for each of its methods, but the bodies vary in what methods and arg names they use in interop calls.
12:36	TimMc	I've taken a stab at writing what I think I want my source code to eventually look like, but even that isn't quite right.
12:37	TimMc	A big part of the problem is that I want to splice-inject forms, not just inject them.
12:38	technomancy	TimMc: whoa, what?
12:38	technomancy	Box, huh
12:39	ppppaul	,(clojure.lang.Box. 5)
12:39	clojurebot	#<Box clojure.lang.Box@1501d0c>
12:39	ppppaul	i could use a Box
12:40	ppppaul	,(seq (clojure.lang.Box. 5))
12:40	clojurebot	#<IllegalArgumentException java.lang.IllegalArgumentException: Don't know how to create ISeq from: clojure.lang.Box>
12:40	technomancy	been around since 2006
12:41	DerGuteMoritz	TimMc: thanks a lot, Box clearly is the cleanest way to implement this dirty bit :-)
12:42	TimMc	It at least telegraphs your intention.
12:42	DerGuteMoritz	yep
12:43	TimMc	technomancy: I think every Java library of sufficient size has a Box class.
12:43	DerGuteMoritz	that is, my intention to cause trouble!
12:44	technomancy	TimMc: I think knowing you need a Box class requires a certain level of sophistication
12:45	TimMc	Actually, I do see one-element arrays used a lot in Java libs. It's a more opaque idiom.
12:46	TimMc	The use-case is almost always for allowing a "closure" to send back some data.
12:46	ppppaul	...
12:46	ppppaul	woah
12:46	TimMc	(because Java inline classes can only refer to final references)
12:47	technomancy	that's how Mirah implements closures IIRC
12:52	DerGuteMoritz	excellent, I now have a criminally offensive function to turn a (potentially lazy) seq of strings into an InputStream!
12:53	DerGuteMoritz	maybe I could have implemented it easier with gen-class rather than proxy though
12:54	wink	yogthos: did you do any performancetests with luminus or got any resources where to start looking?
12:54	wink	yogthos: I'm basically a noob with JVM stuff in production, but it all felt really slow (just an enhanced guestbook app)
12:58	nDuff	wink: In terms of the JVM in general -- it's designed to maximize throughput after a long, slow spinup time, so the details of how benchmarking is done matter.
13:00	wink	nDuff: siege -c 10 -r 100 as a rough basic test
13:00	squidz	what would be the best way to write this in clojurescript with domina? https://www.refheap.com/paste/13569
13:01	nDuff	wink: nod; second instance of that run against a server should be fair. I'd throw away the first one.
13:01	wink	nDuff: yup. I'm playing aroudn witrh concurrency levels, but that one above only did 15 req/s on my c2d notebook
13:01	nDuff	wink: anyhow -- standard Java-centric tools, ie. YourKit, work well.
13:02	wink	nDuff: ah, thanks, I only know of visualvm
13:02	nDuff	wink: ...a lot of the time when you see really, really awful performance, it'll be related to garbage collection; tuning memory parameters can help a lot with that if it's not something with a clear code fix.
13:07	squidz	its jquery, but i dont know any jquery, so how could I do this with domina?
13:41	yogthos	wink: hey so for performance testing there's a few options
13:41	yogthos	wink: siege is definitely a good one, but if you want to see what's happening in the code that makes it run slow you can use a profiler
13:42	yogthos	the jvm ships with jvisualvm and if you run it and connect to a process you can see where the cycles are going
13:42	wink	yeah, probably a good idea :)
13:42	yogthos	wink: I've got a tutorial on that here http://yogthos.net/blog/24-Reflecting+on+performance
13:43	wink	yogthos: awesome, thanks
13:43	wink	yogthos: I really like luminus so far, good job :)
13:44	yogthos	squidz: this should work
13:44	yogthos	(->
13:44	yogthos	(by-id "datetimepicker4")
13:44	yogthos	(.-datetimepicker)
13:44	yogthos	(.-pickTime false))
13:45	yogthos	squidz: assuming datetimepicker is a property
13:45	yogthos	wink: glad to hear it :)
14:02	DerGuteMoritz	thinking about it again ISTR seeing some library that turned seqs into InputStreams ... is anyone aware of something like it?
14:04	amalloy	seqs of what? you can't just turn an arbitrary seq into an input stream
14:05	DerGuteMoritz	well, based on a protocol to turn things into byte seqs
14:08	borkdude	what is the best intro to clojure philosophy talk out there?
14:12	stuartsierra	borkdude: Maybe "The Value of Values" http://www.infoq.com/presentations/Value-Values
14:12	borkdude	or if you will, best Rich Hickey talk to watch for someone new?
14:12	borkdude	stuartsierra ok cool, thank you. I'm looking for something I can show in class next monday
14:13	stuartsierra	np
14:16	amalloy	DerGuteMoritz: it's not what you're asking for, but gloss may be what you want
14:17	ppppaul	anyone can give me their thoughts on this lib (testing) https://github.com/jaycfields/expectations
14:18	DerGuteMoritz	amalloy: ah yeah, gloss is cool :-) but no, in my case I am looking for something to turn a seq of strings into an OutputStream; I now have a working proxy based implementation and thinking of maybe packaging it up as a generic library
14:18	noidi	brudgers, I really like Simple Made Easy http://www.infoq.com/presentations/Simple-Made-Easy
14:19	noidi	oops
14:19	noidi	that was meant for borkdude :)
14:19	amalloy	into an output stream? surely you mean an input stream
14:19	borkdude	noidi thanks
14:19	DerGuteMoritz	amalloy: ah, yes, right
14:20	DerGuteMoritz	I am now trying a gen-class based implementation, I have a hunch that it might be less hacky
14:20	amalloy	anyway, that's sorta one unnecessarily monolithic problem: if you break it up into (1) turn a string into an input stream; and (2) turn a seq of input streams into another input stream, then you will find available easy solutions for both things
14:21	DerGuteMoritz	amalloy: (1) is easy, are you aware of an existing solution for (2)?
14:21	amalloy	https://github.com/flatland/io/blob/develop/src/flatland/io/core.clj#L30-L38
14:22	DerGuteMoritz	cool!
14:22	DerGuteMoritz	that library looks like what I had in mind :-)
14:22	DerGuteMoritz	thank you!
14:25	gfredericks	I did not know about SeqEnumeration
14:26	amalloy	gfredericks: i told you about it yesterday, but i think you had already gone
14:26	gfredericks	I implemented it myself in a thread-dangerous way
14:27	amalloy	well, enumerations are implicitly not threadsafe anyway, right?
14:27	ppppaul	anyone using expectations in clojure?
14:29	gfredericks	amalloy: well you'd hope two threads wouldn't call .nextElement and get the same result?
14:31	amalloy	gfredericks: in java, i wouldn't expect such a hope to be well-founded
14:32	amalloy	for example, java.util.ArrayList produces an iterator which doesn't satisfy your hopes
14:33	amalloy	and, in fact, clojure.lang.SeqEnumeration has exactly the same "problem"
14:33	amalloy	you're just not supposed to use iterators or enumerations from multiple threads
14:35	DerGuteMoritz	amalloy: thanks for pointing me at java.io.SequenceInputStream and clojure.lang.SeqEnumeration, a beautiful solution!
14:48	gfredericks	amalloy: I mean if I was to go about implementing an Enumeration that might be something to aim for
14:49	gfredericks	but perhaps as you say it's not worth the overhead
14:49	gfredericks	if clients aren't expected to multithread it
14:50	gfredericks	curious -- if you're implementing it in clojure and have no need for thread-safety, are atoms still the most straightforward approach?
14:51	gfredericks	the only other option I know of is some kind of mutable field on a deftype
14:55	amalloy	gfredericks: you can use an atom and still be thread-safe. i don't understand the question
14:55	gfredericks	right but if you don't _need_ to be threadsafe and therefore don't _need_ to use an atom
14:56	gfredericks	might you do it anyways just because it's so easy?
14:56	amalloy	well, i'd probably use a ref
14:56	gfredericks	e.g., the java version of SeqEnumeration does not use an atom
14:56	amalloy	but yeah
14:56	gfredericks	because from java it would be much more of a hassle
14:57	amalloy	right
14:57	borkdude	a var? ;)
14:57	borkdude	ducks
14:58	gfredericks	(java ISeq v = seq(coll))
15:00	lynaghk	ping: dakrone
15:00	dakrone	lynaghk: pong
15:00	DerGuteMoritz	gfredericks: haha, I asked exactly the same question a few hours ago
15:00	DerGuteMoritz	gfredericks: clojure.lang.Box is a good way
15:01	DerGuteMoritz	,(let [x (clojure.lang.Box. 1)] (.val x))
15:01	clojurebot	1
15:01	DerGuteMoritz	,(let [x (clojure.lang.Box. 1)] (set! (.val x) 2) (.val x))
15:01	clojurebot	2
15:01	DerGuteMoritz	alternatively, (object-array 1) with aset and aget
15:01	technomancy	looks like Box is used internally in some implementations of maps
15:01	lynaghk	dakrone: I think the generators in cheshire 5.1.0 got borked when the key-fn functionality was added
15:02	DerGuteMoritz	technomancy: ah, for transients I think
15:02	lynaghk	dakrone: I'm getting an arity exception when trying to call cheshire.generate/encode-map
15:02	gfredericks	man I just started using key-fn yesterday
15:02	DerGuteMoritz	at least in the cljs implementation of PersistentHashMap
15:02	gfredericks	it's been working fine for me though
15:02	dakrone	lynaghk: hrm, that's no good, can you gist an example?
15:03	lynaghk	dakrone: yeah, one sec; I'm also happy to submit a pull but wanted to ask you about it first
15:04	DerGuteMoritz	does lein repl :headless :port work for anyone? it doesn't seem to honor the port I'm passing
15:06	lynaghk	dakrone: https://gist.github.com/lynaghk/5374327
15:07	dakrone	lynaghk: thanks, I'll check it out
15:08	lynaghk	dakrone: here's the offending line: https://github.com/dakrone/cheshire/blob/master/src/cheshire/generate.clj#L219 I can either add an empty key-fn to the encode-* functions that call generate or add the 4-arity case to the generate fn.
15:11	dakrone	lynaghk: I see the issue, I'll send nil as the key-fn, looks like encode-seq needs to be fixed also
15:12	lynaghk	dakrone: okay, awesome. thanks dakrone. Do you have a rough ETA on an official release containing those fixes?
15:12	dakrone	lynaghk: less than 30 minutes maybe?
15:12	dakrone	:)
15:12	lynaghk	dakrone: Make sure you get a few beers or coffees out of me if we're ever in the same place
15:22	ivan	&{Float/NaN 3 Float/NaN 4}
15:22	lazybot	java.lang.IllegalArgumentException: Duplicate key: Float/NaN
15:22	ivan	&(assoc {Float/NaN 3} Float/NaN 4)
15:22	lazybot	⇒ {NaN 4, NaN 3}
15:22	Bronsa	huh
15:25	ivan	&(= Float/NaN Float/NaN) ; Bronsa
15:25	lazybot	⇒ false
15:26	Bronsa	, (let [x Float/NaN] ({x 1} x))
15:26	clojurebot	nil
15:26	Bronsa	&(let [x Float/NaN] ({x 1} x))
15:26	lazybot	⇒ nil
15:27	Bronsa	&(let [x {Float/NaN 1}] (map x (keys x)))
15:27	lazybot	⇒ (1)
15:28	ivan	&(let [x {Float/NaN 3}] (= x x))
15:28	lazybot	⇒ true
15:28	ivan	Python is similarly "broken"
15:28	borkdude	is def thread safe?
15:29	nDuff	borkdude: Setting atoms involves locking.
15:29	nDuff	err, vars
15:29	Bronsa	,(let [x {Float/NaN 1}] (map x (keys x)))
15:29	clojurebot	(nil)
15:29	Bronsa	&(let [x {Float/NaN 1}] (map x (keys x)))
15:29	lazybot	⇒ (1)
15:29	Bronsa	wtf.
15:29	amalloy	ivan: it's a brokenness that is required by the IEEE floating-point spec
15:29	borkdude	I wonder what things could go wrong with this: http://stackoverflow.com/questions/15979151/can-i-refer-to-a-clojure-hashmap-value-from-another-value-in-the-same-map/15979322
15:29	nDuff	borkdude: so, you get more concurrency from using atoms
15:29	Bronsa	&clojure-version
15:29	lazybot	⇒ {:major 1, :minor 4, :incremental 0, :qualifier nil}
15:29	Bronsa	,clojure-version
15:29	clojurebot	{:major 1, :minor 5, :incremental 0, :qualifier "RC6"}
15:29	Bronsa	uh uh
15:31	Bronsa	amalloy: I understand why ({Float/NaN 1} Float/NaN) would return false, but it looks to me like (let [x {Float/NaN 1}] (map x (keys x))) should return 1 as it did in 1.40
15:31	Bronsa	1.4,0*
15:32	Bronsa	am I right or ..?
15:32	Bronsa	s/false/nil
15:33	dakrone	lynaghk: Cheshire 5.1.1 released, should be good to go. I also added a test using every one of the custom helpers, so hopefully it won't happen it the future
15:33	dakrone	lynaghk: thanks for catching it and letting me know!
15:33	gfredericks	,(= Float/NaN Float/NaN)
15:33	clojurebot	false
15:35	devn	Given: (foo (bar (baz qux))) id like to know how many layers deep it is. for instance (how-deep (foo (bar (baz qux)))) => 3
15:35	amalloy	Bronsa: probably not. getting NaN out of a map is something that should be impossible, since you should never be able to find an object that is equal to the key
15:36	Bronsa	,(let [x Float/NaN] (= x x))
15:36	clojurebot	false
15:36	Bronsa	right
15:36	Bronsa	then it was broken back in 1.4.0
15:37	amalloy	i expect it changed when rich added EquivPred
15:37	Raynes	ibdknox: I don't like surprises. Tell me what the surprises are.
15:37	Bronsa	yeah
15:37	Bronsa	I wonder if NaN should be allowed at all as a key
15:37	amalloy	Bronsa: NaN isn't the only thing that behaves this way. you can't forbid them all
15:38	amalloy	(you can advise against them all, of course, but you can't throw an exception)
15:38	devn	amalloy: in 4clojure where is the code to calculate the golf score?
15:38	amalloy	devn: it's just (count (remove whitespace? soln))
15:39	borkdude	Raynes IE6 support in LightTable?
15:39	devn	oh, okay.
15:39	amalloy	you can just write how-deep yourself; it's not a hard recursive function
15:39	Bronsa	meh. I guess you're right, thanks amalloy
15:39	devn	amalloy: yeah, you're right
15:39	devn	thanks
15:40	ivan	I would guess no one thinks = should deep-descend everything to make (let [x {Float/NaN 3}] (= x x)) false
15:42	ivan	perhaps collections could taint themselves with a "I cannot possibly be equal to myself" flag
15:48	lynaghk	dakrone: awesome! thanks again for the quick fix.
15:53	TimMc	,(let [x {Float/NaN 5}] (= x x))
15:53	clojurebot	true
15:54	TimMc	,(let [x {Float/NaN 5}] (= x (into {} x)))
15:54	clojurebot	false
15:54	TimMc	Anyway, using numbers as keys is kind of sketchy.
15:54	TimMc	Especially floats.
15:56	mefesto	,(= Float/NaN Float/NaN)
15:56	clojurebot	false
15:56	mefesto	interesting
15:58	Okasu	mefesto: Nope.
15:59	Okasu	,(= 1.0 0.99999999999999999)
15:59	clojurebot	true
16:00	metellus	,(- 1.0 0.99999999999999999)
16:00	clojurebot	0.0
16:00	pjstadig	,(.equals Float/NaN Float/NaN)
16:00	clojurebot	true
16:00	asteve	,(= 1.0 0.9999
16:00	clojurebot	#<RuntimeException java.lang.RuntimeException: EOF while reading>
16:00	asteve	)
16:00	asteve	,(= 1.0 0.9999)
16:00	clojurebot	false
16:01	asteve	how many 9's = repeating
16:01	asteve	?
16:01	Okasu	,(count "99999999999999999")
16:01	clojurebot	17
16:01	asteve	(= 1.0 9999999999999999)
16:01	asteve	,(= 1.0 9999999999999999)
16:01	clojurebot	false
16:01	asteve	,(= 1.0 99999999999999999)
16:01	clojurebot	false
16:01	asteve	whoops
16:02	asteve	(= 1.0 0.9999999999999999)
16:02	asteve	,(= 1.0 0.9999999999999999)
16:02	clojurebot	false
16:02	asteve	damnit
16:02	asteve	,(= 1.0 0.99999999999999999)
16:02	clojurebot	true
16:02	mefesto	heh
16:02	asteve	that's what happens when you make a mistake in your irc history; you're bound to repeat it :)
16:03	AimHere	Those who do not log the past are condemned to repeat it
16:04	mishok13	are there any test coverage tools that work with Midje?
16:07	Okasu	,(= 1.0 (reduce + (repeat 10 0.1)))
16:07	clojurebot	false
16:07	Okasu	,(reduce + (repeat 1000 0.1))
16:07	clojurebot	99.9999999999986
16:08	patchwork	lovely
16:08	alindeman	Does using clojure.xml require something other than just (:require [clojure.xml]) in my ns declaration? Getting a ClassNotFoundException when running `lein jar`
16:09	kanwei	[org.clojure/data.xml "0.0.7"]
16:09	kanwei	what i use at least :)
16:10	MarcoPolo	,(= 1.0M (reduce + (repeat 10 0.1M)))
16:10	clojurebot	true
16:10	alindeman	kanwei: Is clojure.xml gone in favor of clojure.data.xml?
16:10	alindeman	kanwei: I'm finding it hard to figure out when things came in and out of clojure
16:11	alindeman	The docs I have seem to say that clojure.xml is shipped with clojure?
16:11	kanwei	i just did (require 'clojure.xml)
16:12	technomancy	IIRC clojure.data.xml is better but requires an additional dependency
16:12	kanwei	both seem to work here
16:18	stuartsierra	To my knowledge, nothing has been removed from the Clojure language distribution.
16:27	technomancy	«As to why xml and zip are in Clojure: because I wrote them, and: zip is non-trivial and without it people would have wondered how to manage these immutable trees, and XML was simply to show, early on, how to "get into Clojure data structures ASAP", an important model for all libraries.» - https://groups.google.com/group/clojure/msg/58ec09f7de93f1d9 (rich)
16:29	dakrone	stuartsierra: seq-contains? was removed
16:29	Okasu	,((juxt #(reduce + %) #(reduce - %)) [1 2 3])
16:29	clojurebot	[6 -4]
16:29	Okasu	,((juxt (partial reduce +) (partial reduce -)) [1 2 3])
16:29	clojurebot	[6 -4]
16:30	dakrone	stream? was removed
16:31	technomancy	I thought stream? was only ever on a branch
16:31	TimMc	,((apply juxt (map (partial partial apply) [+ -])) [1 2 3])
16:31	clojurebot	[6 -4]
16:31	TimMc	Okasu: ^
16:32	dakrone	technomancy: dunno, just doing a `git log \| fgrep remove` and looking at what's been removed from clojure
16:34	technomancy	I think stuart was implying nothing that made it into a release was then removed
16:39	stuartsierra	yes
16:40	dakrone	removed at all, or removed without feature-parity workaround?
16:41	dakrone	because add-watcher and remove-watcher were removed, although they can be implemented in terms of add-watch (but not exactly the same)
16:43	dakrone	still, stuartsierra's point stands, and it's very difficult to find things that have been removed
16:49	kanwei	i really like that about clojure, coming from a python background where every release was different :)
16:50	kanwei	we had to maintain a branch for 2.4, 2.5, 2.6, and 2.7
16:52	gfredericks	I think rich's plan is to leave deprecated features indefinitely
16:52	gfredericks	in the same way that j.u.Date is still around
16:53	Okasu	,((apply juxt (map (partial partial apply) [+ -])) ((reduce (partial partial reduce) (repeat 1 partial)) [1 2 3]))
16:53	clojurebot	[6 -4]
16:53	Okasu	TimMc: ^
16:56	Okasu	,((comp + + + + + + - - - - - - - +) 1 1)
16:56	clojurebot	-2
16:57	Okasu	,((comp = + + + + + + - - - - - - - +) 1 1)
16:57	clojurebot	true
17:01	pl6306	How do I use regex in clojure to find a line that starts with "TODAY=" in string?
17:02	SegFaultAX	pl6306: re-seq probably.
17:03	metellus	or re-find or re-matches, depending
17:03	metellus	something in that family
17:03	ToBeReplaced	,(re-matches #"TODAY=." "TODAY=FRIDAY")
17:03	clojurebot	nil
17:03	ToBeReplaced	oops
17:04	ToBeReplaced	#"TODAY=.*"
17:04	pl6306	thanks i got it (defn get-singleline-property "Extracts single line properties from File." [field sss] ((split (re-find (re-pattern (str field "=.*")) sss) #"=") 1))
17:04	pl6306	Thanks
17:05	SegFaultAX	,(re-seq #"^TODAY=(.*)" sss)
17:05	clojurebot	#<CompilerException java.lang.RuntimeException: Unable to resolve symbol: sss in this context, compiling:(NO_SOURCE_PATH:0:0)>
17:06	SegFaultAX	,(let [sss "TODAY=123\nNOT_TODAY=456\nTODAY=abc"] (doall (re-seq #"^TODAY=(.*)" sss)))
17:06	clojurebot	(["TODAY=123" "123"])
17:06	pl6306	How do something like skip lines (a seq) until I hit say "BEGIN" and stop after "END"?
17:07	ToBeReplaced	drop-while take-while
17:07	pl6306	Cool
17:07	pl6306	thanks
17:08	wink	breaking news: as soon as you don't benchmark shitty hardware, the results aren't disapppointing anymore
17:15	SegFaultAX	Clojure's regex flags are weird.
17:18	SegFaultAX	pl6306: You can add a (?m) to the start of that regex snippet I gave you to enable multiline mode.
17:22	squidz	what needs to be done to make the compiled clojurescript smaller?
17:23	TimMc	SegFaultAX: s/Clojure/Java/
17:24	dnolen	squidz: I don't see much room for improvement unless you're talking about more trivial programs. We could probably do smarter things here and there.
17:24	SegFaultAX	TimMc: Are the inline flags available in plain old Java re?
17:25	squidz	dnolen: because I think I heard somewhere that clojure in clojure would reduce the size. Am I mistaken
17:25	SegFaultAX	dnolen: Does clojurescript compress well? Does closure do anything to help?
17:26	pl6306	How I split a string by say "\r\n" or "\n"?
17:26	dnolen	squidz: huh, not sure how C-in-C will help with that, it's still work that needs to be done.
17:26	dnolen	SegFaultAX: it does compress well, we produce the kind of code that Closure was desgned to optimize.
17:27	squidz	dnolen: okay so the size probably isnt going to improve much?
17:27	dnolen	squidz: for trivial programs yes, for non-trivial programs we're already doing very well.
17:28	guns	pl6306: clojure.string/split-lines
17:28	squidz	by compressing are yall talking about using google closures optimization?
17:28	dnolen	http://blog.sethladd.com/2013/03/i-shrunk-my-dart-to-js-code-by-11x-and.html
17:29	dnolen	we're doing about as well as Dart compression-wise, and Dart has way more engineers on it.
17:29	MarcoPolo	What's left to use sourcemaps with clojurescript, and how can I help?
17:29	dnolen	we get a lot for free from Closure
17:30	kanwei	dnolen: off top of your head, any idea what a "smallish" cljs gzipped total would be?
17:30	dnolen	MarcoPolo: read the code, we need to swap in tools.reader and fix emission
17:30	kanwei	i'm an angularjs developer and it's 80k gzipped
17:31	dnolen	kanwei: the smallest I've see is ~19k, I think 80k gzipped is about right for small applications.
17:31	kanwei	that's really good
17:31	squidz	awesome, i didnt know it was that good
17:32	kanwei	now if someone would port angularjs to cljs :)
17:32	dnolen	kanwei: hehe, people seem to be happy using angularjs from cljs
17:32	dnolen	kanwei: angular supports advanced compilation no?
17:32	squidz	I havent had any luck turning closures optimizations on yet. What can be done to help make clojurescript code take advantage of closures optimizations?
17:33	dnolen	squidz: closure optimizations are all about code size, we do our own optimizations for perf (which kicks in if you used the advanced setting).
17:33	kanwei	dnolen: never tried advanced, i need jquery and some other stuff for my current project
17:33	dnolen	kanwei: gotcha
17:34	kanwei	dnolen: do futures work in cljs?
17:35	dnolen	kanwei: they do not
17:35	kanwei	dnolen: i've seen your talk on Oz, having read the book myself, i'm a big fan of dataflow vars
17:36	kanwei	i think futures can "kind of" replace dataflow vars
17:38	scottj	dnolen: doesn't look like angular js works with advanced mode https://github.com/angular/angular.js/pull/1951
17:39	dnolen	kanwei: yes dataflow vars are cool. futures could probably be made to work w/ some compiler hacking - but I haven't looked at it much and people seem to be coming up w/ other solutions that work well enough.
17:39	TimMc	SegFaultAX: Yeah, Clojure regexes are just Java regexes, straight-up.
17:40	TimMc	The Clojure reader provides some syntax that allows for fewer backslashes, that's all.
17:40	SegFaultAX	TimMc: TIL. I've never used the (?mix) style switches in Java. I just use the appropriate constants.
17:41	kanwei	sorry my internet died
17:41	kanwei	dnolen: any thoughts on dataflow concurrency in cljs?
17:42	dnolen	kanwei: not really, beyond I think it would be cool, but I haven't looked into much myself.
17:46	TimMc	alexbaranosky: clj-schema's reporting for :or predicates can be really misleading. Are there plans to change this?
17:55	SegFaultAX	Eheh http://starlogs.net/#clojure/clojure
17:58	wink	SegFaultAX: htpt://starlogs.net/#s-t-a-r-w-a-r-s/episode-iv beats all
18:38	n_b	Anyone have experience using Scala within a clojure project?
18:40	technomancy	n_b: there's a lein-scalac plugin, but it's kind of a proof-of-concept more than anything else
18:41	callen	The next time I try to share some professional experience with somebody and the say, <nasal voice>"well that's anecdote"</nasal voice> I am going to go volcanic.
18:41	callen	technomancy: sometimes I think Scala is design-by-checklist.
18:41	callen	which is regrettable, because I find about 1/3 of the checklist intriguing.
18:41	technomancy	callen: that's how I imagine D
18:42	technomancy	pokemon-oriented programming. gotta catch all the paradigms.
18:42	callen	technomancy: yep. Although I think half of that was Alexandrescu laughing in his evil lair exclaiming, "MORE POWER!"
18:42	n_b	callen: You'll just have to reply Comic Book Guy style; "Worst. Rebuttal. Ever."
18:43	n_b	technomancy: Thanks - I'll take a look at that.
18:44	callen	n_b: it's just annoying because it's that thing not-smart-enough-by-half people do to sound educated where they try to port the jargon and technique from scientific disciplines into something totally irrelevant like workplace interactions and meetings.
18:44	callen	"This isn't a double-blind study, shuddup"
18:45	muhoo	is there a way to golf this up? (f1 x (f2 x))
18:45	callen	muhoo: comp?
18:45	callen	muhoo: thrush?
18:45	amalloy	make it shorter than that? no
18:45	amalloy	but you could avoid repetition if you want
18:46	muhoo	wow. if amalloy says there's no way to to it, then there's no way to do it. thanks.
18:46	n_b	(-> x f2 f1)
18:46	amalloy	if you don't mind making it three times longer :P
18:46	muhoo	amalloy: i'm curious
18:46	callen	n_b wrote what I had in mind.
18:46	muhoo	probably won't use it
18:46	amalloy	callen: because neither of you read the original request :P
18:46	callen	amalloy: I'm a write-only IRC daemon.
18:46	n_b	It's same # of chars, just moving them around a bit :p
18:47	muhoo	callen: n_b: nope, look, it's got x as the first arg to f1, and the resulst of f2 as the second arg to f1
18:47	amalloy	his code is (->> x f2 (f1 x)) or something
18:47	amalloy	n_b: it also does something totally different
18:47	callen	muhoo: write APL if you want that much concision.
18:47	n_b	ohh. yes.
18:47	amalloy	(apply f1 ((juxt identity f2) x)), lol
18:48	muhoo	hahah
18:48	amalloy	anyway, as i said it's much longer but has no repetition
18:48	muhoo	well... i could write a function to do that
18:48	muhoo	takes a vector of f's, and applies it in that pattern. but again, i'm rearranging deck chairs here
18:49	muhoo	the yak looks back worried. "i'm chilly, i don't need a shave!"
18:50	callen	muhoo: next step is skinning the yak.
18:55	muhoo	don't worry, i'm putting that on my to-do-when-bored list
18:56	muhoo	it smells like reduce could be used, maybe. later.
19:04	maquina	hi guys, i had a question, i have created a function in clojure with defn, and in the function body I instantiate a java object, however the object is instantiated even if the function is not called
19:04	maquina	do you know why this happens?
19:06	maquina	actually, even if i do :import type-name, the type -init method is called
19:12	technomancy	maquina: yes, that gets called when the class is loaded
19:12	technomancy	that's what -init is for
19:29	maquina	technomancy: thanks! is there anyway to prevent this? when i call the same clojure code from java, the -init method is not called until i call new, and i would like to replicate this behaviour
19:31	noonian	Hi, I just started messing around with dynamic vars and the binding form. If I want to bind (with binding) a var called foo for code I call from another namespace, do I have to declare (def ^dynamic foo) in each namespace? also if that is the case but there is a more idiomatic way to do something like that I would like to know.
19:38	technomancy	maquina: you can defer class loading to runtime with reflection
19:41	maquina	technomancy: mm.. ok, so this is just clojure behaviour? i am just surprised because in java if i import the class generated by clojure the method in -init is not called until i call new
19:44	nDuff	maquina: it's just like static initialization sections in Java.
19:44	nDuff	maquina: those are invoked well before you call new.
19:44	nDuff	maquina: ...so, a defn itself won't do that.
19:45	nDuff	maquina: perhaps something in your namespace actually calls the function.
19:46	maquina	nDuff: its just that I am porting some legacy code from java, the java code was calling a clojure generated class, the code inside -init in the clojure class, was only called when i called new in java. however now that i ported to clojure, the code in -init gets called as soon as i do import
19:47	nDuff	maquina: Show me the code.
19:59	maquina	nDuff: its this class: https://github.com/nathanmarz/storm/blob/0.8.2/src/clj/backtype/storm/LocalCluster.clj
19:59	maquina	nDuff: LocalCluster, in clojure -init is called as soon as i import LocalCluster, in java it is called when i call new LocalCluster
20:04	nDuff	That's... surprising. Can you provide the code you use to reproduce or demonstrate that behavior?
20:05	nDuff	(or, if not the exact code, a minimal reproducer which does so)?
20:20	jjttjj	f
20:49	Raynes	Does the Clojurscript book even mention compiling for node?
20:49	Raynes	Or working with cljs on node?
20:51	chessguy	hidy-ho neighbors
21:05	rbxbx	Raynes breifly, yes.
21:05	rbxbx	briefly, also.
21:05	Raynes	So it doesn't actually discuss using it?
21:06	rbxbx	No, it just mentions that you're able to set it as a compilation target.
21:06	rbxbx	"Compiling ClojureScript for Node.js is still an experimental feature and not widely used, so we do not cover it in this book."
21:09	Raynes	Heh
21:09	Raynes	I wish people cared more. At least we have ohpauleez and friends.
21:12	ttimvisher	is there any way to tell pr-str to strip out unreadable forms?
21:12	ttimvisher	i.e. when there's a java object in there?
21:14	ttimvisher	also, i'm probably misunderstanding something fundamental here but i thought i could reference a symbol from the surrounding expansion context in a macro. i.e. a let with a particular symbol and then a macro expanded in the let. doesn't seem to be working though. is that a thing?
21:15	callen	Raynes: cljs and caring don't mix.
21:15	Raynes	Burn.
22:23	romanandreg	hey, would it be possible at all have something like robert.hooke in clojurescript?
22:28	romanandreg	ping
22:28	VFe	It may not be practical or performant, but I'm trying to think of reasons that wouldn't be possible, but can't think of any.
22:29	jack_rabbit	I'm having a problem with aleph whenever I try 'lein run.' The code works fine in the repl, so I'm wondering what I'm doing wrong: http://pastebin.com/L7sEE7qq is the error, and https://github.com/Jack-Rabbit/clojirc/blob/master/src/clojirc/core.clj is the code.
22:54	jack_rabbit	sorry, I ducked out.
22:57	jack_rabbit	Huh. It seems that the line "(alter-var-root #'read-eval (constantly false))" is causing my problems. Any ideas?
23:01	amalloy	jack_rabbit: nothing obvious springs to mind; it looks like something in clojirc is trying to compile stuff at runtime
23:01	jack_rabbit	:/ shouldn't be. Could it be a macro expansion?
23:02	amalloy	nah
23:03	jack_rabbit	Do I need to compile it specially in order to run it? If I call start-freenode once it seems to "initialize" whatever it is that needs to be compiled.
23:04	jack_rabbit	After calling it, I can run -main fine.
23:06	amalloy	no. although i'd suggest getting rid of all the AOT in your app; it leads to exciting problems for no reason
23:06	jack_rabbit	AOT?
23:06	clojurebot	AOT genclass is http://paste.lisp.org/display/70665 and http://clojure-log.n01se.net/date/2008-11-18.html#14:19
23:06	amalloy	:gen-class
23:06	jack_rabbit	What exactly is that? leiningen put it there, so I just followed suit.
23:07	amalloy	well, in order to define a named -main entry point, you need to generate a named class, with gen-class
23:07	amalloy	but clojure transitively compiles every namespace that your class depends on
23:07	jack_rabbit	So I'll need it in my core.clj file?
23:08	amalloy	my advice, if you don't need any other features of AOT, is to define a "dummy" main namespace that doesn't depend on anything, but requires the real main at runtime and delegates to it
23:09	jack_rabbit	Huh. It seems to run okay without :gen-class in my core file anyway.
23:10	amalloy	yeah. you only need to gen-class if you want to create runnable jar files, i think
23:11	amalloy	and if you do need that, i recommend the technique i just outlined, like https://gist.github.com/amalloy/5376731
23:11	jack_rabbit	Cool. I'll probably do that, then.
23:12	jack_rabbit	My core.clj will have gen-class, and 'require' a separate namespace with my real "main"
23:12	jack_rabbit	hmm. It seems to be a problem with lamina.
23:14	amalloy	doubtful. lamina is pretty solid
23:14	amalloy	but feel free to ask ztellman, if you find a minimal repro case
23:14	jack_rabbit	Is it really dangerous to allow code to compile at runtime? That always seemed like a cool feature of lisps to me. It also seems fairly difficult to get a
23:15	jack_rabbit	"read" prompt with which to compile arbitrary forms.
23:15	jack_rabbit	Unless that feature is directly built in.
23:18	jack_rabbit	I guess it's just odd that I don't see any of my functions on the callstack in these errors. I don't have a lot of experience debugging in the JVM. Do you have any suggestions?
23:21	amalloy	jack_rabbit: of course some of your functions are in the callback
23:22	jack_rabbit	what do you mean?
23:22	amalloy	but line 47 of your paste indicates that it's happening while compiling some clojure functions, rahter than running them, and i can't really see any reason why they aren't already compiled
23:22	amalloy	search for clojirc in that paste, it comes up lots of times
23:23	amalloy	well, okay, three times
23:23	jack_rabbit	oh, yeah. I see.
23:31	jack_rabbit	The only thing that could really cause compiling should be reading some form from a file or input or somesuch, right?
23:32	ttimvisher	is it possible to reference a symbol from the surrounding context from a macro?
23:32	ttimvisher	i.e. i know symbol `r` will exist everywhere the macro is expanded
23:32	jack_rabbit	It's possible, but not good practice.
23:33	jack_rabbit	It makes your macro non-hygenic.
23:33	ttimvisher	jack_rabbit: i can definitely see why. i'm trying to write a very simple logging decorator to all my compojure routes
23:33	jack_rabbit	*hygienic
23:33	ttimvisher	and i have :as r at the end of each destructuring and i'm trying to simply omit that from the arguing
23:33	ttimvisher	argument*
23:33	ttimvisher	i can't seem to make it work though.
23:34	ttimvisher	syntax quote leaves me with a fully-qualified symbol
23:34	ttimvisher	and ~ and ~@ require that the symbol be passed as an argument as far as i can tell
23:42	amalloy	ttimvisher: why is this a macro at all? just make it a middleware like anything else
23:43	amalloy	(defn wrap-logging [handler] (fn [req] (log req) (doto (handler req) log)))
23:44	ttimvisher	amalloy: lol. good point.
23:45	ttimvisher	i'm always looking for an excuse to write a macro and then someone comes along and pushes me down. ^_^