#clojure – 2013-05-01

2013-05-01

11:52	hyPiRion	,(as-> x {} (assoc x :a 1) (assoc x :b (+ 1 (:a x))))
11:52	clojurebot	#<CompilerException java.lang.RuntimeException: Unable to resolve symbol: x in this context, compiling:(NO_SOURCE_PATH:0:0)>
11:52	hyPiRion	well, well, well.
11:52	hyPiRion	,(as-> {} x (assoc x :a 1) (assoc x :b (+ 1 (:a x))))
11:52	clojurebot	{:b 2, :a 1}
11:53	llasram	Yeah, that ordering is weird
11:54	hyPiRion	yeah, I don't like it.
11:55	hyPiRion	I suppose it's for making it usable within (-> ... (as-> x ..))
11:58	llasram	That makes some sense...
11:59	chouser_log	where is as-> from?
11:59	mpenet	clojure 1.5.x
12:01	chouser_log	ok, thanks.
12:05	gdev	chouser_log:) set log level to debug
12:09	chouser	heh, fixed, thanks. :-)
12:18	gdev	chouser:) the article you and Fogus posted on dr dobbs is on the front page, nice
12:18	gdev	also ishows up in the "most popular" side widget as well
12:19	chouser	ooh, nice.
12:20	jchauncey	anyone know of a good tutorial on thread-first thread-last macro usage?
12:23	gdev	if none exist, would you like to create one?
12:24	ucb	+1
12:25	gdev	jchauncey:) I think the examples http://clojuredocs.org/clojure_core/clojure.core/-%3E and http://clojuredocs.org/clojure_core/clojure.core/-%3E%3E are pretty good
12:27	gdev	,(Integer/parseInt "1100100" 2)
12:27	clojurebot	100
12:27	gdev	,(Integer/parseInt "11001001" 2)
12:27	clojurebot	201
12:29	gdev	,(-> "oh hai" .toUpperCase (.replace "H" "B"))
12:29	clojurebot	"OB BAI"
12:29	papachan	hey
12:31	gdev	,(->> (range 1 10) (filter even?) (reduce +))
12:31	clojurebot	20
12:38	justin_smith	,(+ () () (* (+ () ()) (+ () () () ()) (+ () () () () (*))))
12:38	clojurebot	42
12:38	chouser	swearjure
12:40	gdev	,(+ #_(clojurebot, what is the answer to the universe????) () () (* (+ () ()) (+ () () () ()) (+ () () () () (*))))
12:40	clojurebot	42
12:42	justin_smith	,(+ (+) () (+) () (+) (* (+ () ()) (+ () (+) () (+) () (+) ()) (+ () (+) () (+) () (+) () (+) (*))))
12:42	clojurebot	42
12:42	shriphani	Hi, I have a question about clj-time. This is clearly not right: (clj-time-coerce/to-date 1325376000) => #inst "1970-01-16T08:09:36.000-00:00". What is the right routine to accomplish this ?
12:43	mpenet	,(java.util.Date. 1325376000)
12:43	clojurebot	#inst "1970-01-16T08:09:36.000-00:00"
12:44	mpenet	,(java.util.Date. 1325376000000)
12:44	clojurebot	#inst "2012-01-01T00:00:00.000-00:00"
12:44	shriphani	ah. milliseconds.
12:44	mpenet	classic
12:55	gdev	clojurebot:) tell me about your mother
12:55	clojurebot	My mother? I'll tell you about my mother
12:56	AimHere	clojurebot: open the pod bay doors
12:56	clojurebot	I'm sorry, AimHere. I'm afraid I can't do that.
12:58	gfredericks	clojurebot: botstack
12:58	clojurebot	/me puts lazybot on his head and gropes blindly for a third bot to complete the stack.
13:07	muhoo	anyone else notice that some simple things take much longer to get working in clojure than in other languages?
13:07	muhoo	like, i'm working on a simple web app, prolly would take me a half hour in php, maybe a couple hours in rails (due to all the MVC BS), but it's taking days in clojure
13:08	trinary	lots, but only because I have absolute no idea what I'm doing in clojure yet :)
13:08	muhoo	trinary: yeah, i figured that might explain a lot in my case as well
13:08	shriphani	is there a way to have 2 main classes ?
13:09	shriphani	I know it is shitty design but I have two files that are more like individual scripts
13:09	shriphani	but I would like to get 2 jars when I lein uberjar
13:12	technomancy	shriphani: you can just do `java -cp myjar.jar my.main1` and `java -cp myjar.jar my.main2`
13:12	sohail	so ladies and gentlemen, I'm looking at https://github.com/vedang/clojure-emacs and it seems that for some reason, they are not supporting slime?
13:14	dnolen	sohail: nrepl.el has taken over, slime support was basically not going anyway
13:15	shriphani	technomancy I don't see a .clj in those commands. (sorry I am a complete jvm noob).
13:15	sohail	dnolen, thanks, is nrepl as good as slime for lisp?
13:16	technomancy	shriphani: :main only affects what `java -jar ...` uses. with `java -cp ...` you can specify your own main.
13:16	sohail	ok, technomancy is doing it so I trust it is right
13:16	technomancy	sohail: nrepl.el is better in some ways and worse in others.
13:17	sohail	technomancy, par for the course. trying it now
13:17	shriphani	technomancy and lein compile will generate both mains ?
13:17	technomancy	sohail: the inspector is the main thing I miss. the debugging stuff is a bit more work to set up, but with ritz it's pretty good.
13:17	technomancy	shriphani: `lein compile` will compile whatever you tell it to in :aot inside project.clj
13:18	sohail	technomancy, ah ok
13:18	technomancy	so as long as your mains are in there and have :gen-class directives you're good
13:18	shriphani	ah. I didn't know about aot. That was helpful. thanks.
13:19	sohail	any of you guys in toronto? there's osme sort of clojure thing today
13:21	melipone	hello
13:22	technomancy	huh; there's one near seattle too tonight, but not seajure: http://www.meetup.com/SeaLang/events/112617852/
13:23	mindbender1	why can't we get a sparse thing in clojure
13:24	justin_smith	muhoo: rails and php are both tailored to the expectation you are making a webapp
13:24	justin_smith	muhoo: there are a few clojure frameworks that try to do somthing similar
13:24	melipone	my question is I have (declare ^:dynamic myvar) in a file and then a (binding [myvar (memoize somefuntion)] ...) in a function. Why do I get an illegal state exception when I want to execute the function that says that myvar is non-dynamic?
13:25	sohail	technomancy, seajure nice name
13:25	nDuff	melipone: Which version of Clojure? Very old versions used earmuffs rather than ^:dynamic
13:25	sohail	so anyone here use clojure at work? web stuff?
13:26	Glenjamin	noidi: late response, but the problem is i want it to work for any value, i don't have a known list
13:26	melipone	it's clojure 1.5.0
13:26	melipone	clojure 1.5.1 sorry
13:27	nDuff	melipone: A reproducer would be helpful, then.
13:27	justin_smith	sohail: yeah, we have our own in house web orm framework
13:27	justin_smith	clojure backend, but regular js on the frontend because the frontend devs are not clojure guys
13:27	nDuff	melipone: (declare ^:dynamic myvar) (binding [myvar true] myvar) works for me.
13:28	melipone	nDuff: I have that in a file that I load with (require 'myfunctions)
13:28	melipone	nDuff: when I do it at the repl that works but not from a file
13:28	sohail	justin_smith, why choose clojure if you have to reinvent stuff like web frameworks? (I'm not trying to be an ass, I'm just trying to understand - I love lisp)
13:29	asteve	what's the best library for date patterned time?
13:29	justin_smith	sohail: 1) performance 2) maintainability and ease of use of the resulting framework
13:29	asteve	I need to get today's date and yesterday's date
13:29	asteve	yyyyMMdd format
13:30	nDuff	melipone: well, can you gist a lein project or a minimal file?
13:30	Glenjamin	sohail: http://clojure.org/rationale is valid regardless of platform
13:30	gdev	today is 20130501 and yesterday was 20130430
13:30	justin_smith	(performance of resulting app + conveniences of language) - added time to develop our own orm > (performance of previous setup)
13:30	Glenjamin	asteve: maybe clj-time
13:30	Glenjamin	gdev++
13:30	melipone	nDuff: okay. holdon
13:30	nDuff	melipone: May be a bit before I respond -- about to head downstairs to lunch.
13:31	sohail	Glenjamin, justin_smith thanks.
13:31	sohail	justin_smith, what did you use previously?
13:32	justin_smith	also: the clojure orm / webapp framework was a senior devs weekend project - he would likely have gotten bored with web dev backend work without clojure being around, so management had reason to humor him :)
13:32	justin_smith	sohail: php, then rails
13:35	sohail	justin_smith, I can understand your senior dev's pov :)
13:37	justin_smith	even factoring in the extra time to develop our own infrastructure, clojure is now the company goto if possible because of the reduced development time / better performance
13:37	justin_smith	I guess I already said that
13:38	sohail	justin_smith, cool, thanks for sharing!
13:41	asteve	gdev: thanks, do you have a library that can give me that information on command? :)
13:41	asteve	Glenjamin: I'll look into clj-time; thanks
13:41	asteve	https://github.com/seancorfield/clj-time ?
13:41	Glenjamin	yup
13:44	gdev	asteve:) it's still in pre-alpha release candidate -1 right now, got stuck on giving it a good name too which is usually the stage where my projects die
13:44	asteve	hah
13:46	gdev	the best way to see if a library will do what you need it to do is to go to where its hosted and open an issue saying it needs that feature
13:46	technomancy	haha; been there
13:47	gdev	technomancy:) i was just kidding, people really do that? wow
13:47	technomancy	well, when you think it's not there but it turns out you didn't read the readme as well as you thought you did
13:47	technomancy	or it's buried somewhere else
13:48	gdev	the people that do that are standing right behind me aren't they, they heard everything ? foxpaw
13:51	tbaldridge	dnolan: does core.logic memoize relations? so that the result of (foo 42 lvar) is cached for all invocations of foo no matter their location? Or is there a way to do this?
13:51	tbaldridge	dnolen: that is
13:52	seancorfield	asteve: Glenjamin: canonical clj-time: https://github.com/clj-time/clj-time
13:52	Glenjamin	is there a workflow with clojure.test that doesn't involve me running "lein test" all the time manually?
13:52	gfredericks	tbaldridge: is that not what tabling is?
13:52	tbaldridge	haven't a clue what tabling is
13:52	asteve	seancorfield: thanks
13:53	Glenjamin	seancorfield: cool, is that new? the clojars page links back to the other repo
13:53	tbaldridge	gfredericks: it looks like it may be, I'll dig into it a bit.
13:53	gfredericks	tbaldridge: I was just hedging myself since I haven't used core.logic in months
13:54	seancorfield	Glenjamin: recent change to its own org, yes, to make it easier for a group collaboration
13:54	seancorfield	no new builds yet since it moved
13:55	tbaldridge	gfredericks: that's exactly what I was looking for it seems: http://twelf.org/wiki/Tabled_logic_programming
13:55	seancorfield	we should probably push clj-time 0.5.1 out to update clojars...
13:58	melipone	nDuff: are you back from lunch?
13:58	melipone	nDuff: the gist is at https://gist.github.com/Melipone/5496925
13:59	melipone	nDuff: the instructions to test are at the bottom of the file
14:00	naeg	how can I transform a function like this: http://pastebin.com/kCkSBAQP
14:00	gdev	~nDuff
14:00	naeg	basically add another argument and pass that to the recursive function call inside that function
14:00	gdev	lol how did that space get in there
14:00	gdev	~nDuff
14:00	clojurebot	Please don't use pastebin.com: there are lots of annoying animated ads. Instead, try http://refheap.com, an ad-free pastebin written in Clojure.
14:01	naeg	ok clojurebot
14:02	naeg	how can I transform a function in this manner: https://www.refheap.com/paste/14113
14:02	naeg	do I have to use macros for this?
14:02	micahmartin	In ClojureScript at runtime, I have the name of a var/field as a string. How do I set the value of that var/field to a non-literal?
14:04	micahmartin	naeg: macro sounds like the right approach
14:04	naeg	first time I really need them, usually manipulated functions using functions up to now
14:05	melipone	privmsg nDuff https://gist.github.com/Melipone/5496925
14:06	micahmartin	naeg: does f already exist? Or are you going to pass the defn form into a macro?
14:07	micahmartin	cuz if f already exists, you'll have to do some namespace tweaking to get rid of f and add f-
14:07	naeg	micahmartin: it does exist. I actually just want to make a debug version of a function
14:07	naeg	i don't care how the function is called
14:08	nDuff	melipone: (def ^:dynamic myvar nil)
14:08	micahmartin	If the function in your code? Could you wrap it in a macro for the debugging episode?
14:08	svedubois	I would like to create a fn in CLJS to recursively do this (written in JS):
14:08	svedubois	var model = new X.mesh();
14:08	svedubois	model.file = 'model.vtk';
14:08	svedubois	model.caption = 'Model';
14:08	svedubois	I have written this one in CLJS, but it doesn't work. What am I doing wrong?
14:08	svedubois	https://www.refheap.com/paste/14115
14:09	svedubois	m/set-all! is a macro
14:09	svedubois	that I taken from internet
14:10	svedubois	(the macro works)
14:13	justin_smith	naeg: is there a typo, should b be passed to the recursive call as you just said? or am I misreading
14:15	naeg	justin_smith: nope, the a is correct there. the b of the current function is then the a of the call before
14:16	svedubois	(def a (X/mesh.))
14:16	svedubois	#<[object Object]>
14:16	Glenjamin	svedubois: in normal clojure that's a case for doto, not sure about cljs though
14:17	svedubois	What is trying to render is "object Object.vtk"
14:18	svedubois	and not each element of the meshes vector (def meshes [a b c d e])
14:18	justin_smith	naeg: but b is never used, I am missing something there
14:19	naeg	justin_smith: that is because this is an (stupid) example :P
14:19	justin_smith	ahh, ok!
14:19	naeg	the real function is more complicated, but the transformation is the same
14:20	svedubois	typo (def meshes ["a" "b" "c" "d" "e"])
14:23	Glenjamin	is there a contains-in? somewhere?
14:26	tieTYT2	is there something like "and" but it returns true if all parameters are falsey?
14:26	noidi	Glenjamin, if the path to the nested collection is fixed, you could do something like this: (-> coll :keys :into :nested :colls (contains? :key))
14:27	Bronsa	(defn contains-in? [map ks] (boolean (get-in map ks false))) maybe?
14:27	gfredericks	tieTYT2: doubtful, but easy to write
14:27	Glenjamin	tieTYT2: (not (or
14:27	gfredericks	oh right
14:27	tieTYT2	k, thought something might exist
14:27	tieTYT2	thanks
14:28	gfredericks	(defmacro nor [& xs] `(not (or ~@xs)))
14:28	Glenjamin	Bronsa: yeah, i think the trick is the default value - just checking my structure to see if it'll ever be nil on purpose
14:29	dnolen	tbaldridge: out of curiosity do you have a specific use case? BTW not so weird to ask that question in datomic since Prolog + Tabling takes you closer to Datalog ;)
14:32	tbaldridge	dnolen: yeah, I have a type inferencer for Mjolnir built out using Datomic's datalog. Sadly I think my queries are a bit to complex for the "set at a time" model. So I'm thinking of other ways of attacking the problem.
14:32	tbaldridge	Datomic rules: https://github.com/halgari/mjolnir/blob/datomic/src/mjolnir/ssa_rules.clj
14:33	dnolen	tbaldridge: gotcha
14:35	dnolen	tbaldridge: I do have a lot of perf enhancements in mind for that use case - esp. around conde / tabling - but need more free time ...
14:35	tbaldridge	dnolen: don't we all :-)
14:37	naeg	If I'm in namespace A and I :use B in there, is it possible to modify a function inside B? like I would add another def to the end of the file for namespace B
14:38	naeg	tried it with (with-bindings), but that would mean I'd have to define that function as dynamic, which I would prefer not to do
14:39	akhudek	naeg: you should use (:require [library :refer :all]) rather than :use and to answer your question, you probably need something like (in-ns ..) or the like
14:45	patchwork	So, if I declare a ref in a ns (def thing (ref {})), and two different libs use my ns without realizing, does the value of that ref get stomped between the two libs?
14:45	patchwork	As in, is there a conflict if the two libs want two different values for the ref in that ns?
14:46	gfredericks	yes
14:46	gfredericks	the ref only has one value at a time
14:47	patchwork	So does that mean that declaring refs like that is usually a bad idea?
14:47	patchwork	since two libs can't use the same ns?
14:47	patchwork	and since they may not even realize?
14:47	patchwork	Seems like a problem
14:47	TimMc	patchwork: If you want separate instances, create a fn that returns something with a brand new ref or atom or whatever.
14:48	patchwork	TimMc: So then I would have to pass that ref around everywhere, rather than just referring to a var in the ns?
14:48	TimMc	Yeah.
14:48	patchwork	That seems cumbersome for things like config etc
14:49	patchwork	Where I would have to modify every function to take a new arg that only some of the functions actually care about
14:49	patchwork	(and usually the low level ones)
14:49	patchwork	Is that really what people do?
14:49	technomancy	config is usually a var.
14:50	technomancy	other things ... it depends.
14:50	patchwork	technomancy: a dynamic var? So you just (def config …) again if you want to update something?
14:50	TimMc	patchwork: You never re-def, except in the REPL.
14:51	technomancy	you would recompile to update config during development, yes
14:51	Glenjamin	if you need config to change at runtime...
14:51	Glenjamin	i don't have an end to that sentence.
14:51	patchwork	Yeah, there are some values that change at runtime (not config, but other state)
14:52	technomancy	depends on the details
14:52	gdev	Glenjamin:) if you need config to change at runtime...you're going to have a bad time
14:52	Glenjamin	i initially started with dynamic config, because i wanted some values to depend on others
14:52	Glenjamin	replaced it with a (delay) hack, but at least it's contained
14:53	patchwork	So, if I need values to change at runtime, and want them to work if many libs are referencing the same ns, what are my options?
14:53	patchwork	Do I just rebind everything continuously?
14:53	Glenjamin	i'd say an atom, maybe behind a function - but i defer to the experts
14:54	patchwork	Thanks for helping out, this is puzzling
14:54	technomancy	"your options are locals and vars" is a tautology; these are basically the only things in clojure.
14:54	solussd	does anybody know why I dont see stdout printed to the repl when I start a webserver w/ ring from the repl?
14:54	gfredericks	patchwork: for separate configs for separate clients, a dynamic var might work
14:55	gfredericks	patchwork: that way the config is thread-local
14:55	patchwork	gfredericks: I like that, but what if I need to change some values mid-execution?
14:55	technomancy	this is a bit like asking "I need to store data, what's a good data base?"
14:55	patchwork	do I need to nest every subsequent operation inside a (binding …) call?
14:56	Glenjamin	can you give an example of something that would change?
14:56	gdev	technomancy:) its a tautological dichotomy?
14:56	gfredericks	I agree with technomancy. this is a bit too hypothetical
14:56	gfredericks	technomancy: I was once in an org where a DB was chosen purely based on the fact that it _could_ store data
14:57	technomancy	gfredericks: S3 is my favourite data base.
14:57	gfredericks	S-three
14:57	technomancy	clojurebot: all the nines
14:57	clojurebot	No entiendo
14:57	gdev	msexcel is my favorite db
14:57	trptcolin	databass
14:57	n_b	I'm a fan of /dev/null as a NoSQL store
14:57	Glenjamin	am I a bad person for actually liking MS Access?
14:57	gdev	yes
14:57	gdev	and you should feel bad
14:58	gfredericks	you feel bad and you should be bad
14:58	patchwork	So, there are some expensive operations that occur from some values that come out of the db, so I want to store the result somewhere so I don't have to do it on every call
14:58	patchwork	(I guess this is kind of a cache issue, not a config)
14:58	Glenjamin	https://github.com/clojure/core.cache
14:58	gdev	Glenjamin:) sorry, I'm just projecting, I did MS Access programming with VBA for a whole year and loved it =D
14:58	ppppaul	/dev/null has fast writes
14:59	gfredericks	ppppaul: does it have geo-spatial indexing?
14:59	Glenjamin	heh, there's plenty of bad usage of Access, but it's got a pretty good niche
14:59	gdev	the logs of this chat isn't posted on the internet is it?
14:59	ppppaul	yes, but no
14:59	Glenjamin	i like to think of it as SQLite with a built in gui and report builder
14:59	ppppaul	/dev/null has peace of mind
14:59	gfredericks	ppppaul: what happens if the box my /dev/null is running on crashes?
14:59	Glenjamin	gdev: fraid so http://clojure-log.n01se.net/
15:00	patchwork	Glenjamin: core.cache has the same problem, you have to def the cache somewhere
15:00	ppppaul	/dev/null has automatic distributed replication to all of your friends computers
15:00	gfredericks	lol
15:00	gfredericks	okay so let's talk privacy then
15:00	n_b	guarantees C only
15:00	gfredericks	and SOX compliance
15:00	Glenjamin	patchwork: ah, i see - you probably want an atom
15:01	gfredericks	how easy it is to change my schema in /dev/null?
15:01	patchwork	Glenjamin: But the atom has the same value for every lib that accesses it!
15:01	Glenjamin	oh, you want different values for each lib?
15:01	patchwork	This is my conundrum
15:01	patchwork	Glenjamin: Yeah
15:01	ppppaul	i name all of my atoms by their atomic mass
15:01	gfredericks	a dynamic var with an atom with a ref with an agent with a promise with a future
15:01	solussd	My rule of thumb is, you only need an atom if you're dealing with multiple threads or state across repeated calls to a function
15:02	gfredericks	guys guys can we make a language with mutable nulls?
15:02	patchwork	So if two libs access the same var, it should have the right value for that lib
15:02	Glenjamin	then yeah, you either want to pass it around, or use a dynamic var with binding
15:02	Glenjamin	is this for a web app?
15:02	patchwork	Okay, dynamic var and binding
15:02	ppppaul	what will null mutate into?
15:02	patchwork	Glenjamin: It is a library that webapps could use
15:02	ppppaul	null = 1
15:02	Glenjamin	then i suggest you ship it with some middleware
15:03	Glenjamin	so i can do (wrap-your-lib {:config :options} app)
15:03	Glenjamin	and that takes care of the binding
15:04	patchwork	Glenjamin: Sure but there is functionality that could be used directly as a library as well
15:04	Glenjamin	then you'll want some sort of (with-config {:config :options} ...) macro i guess
15:04	Glenjamin	or you could have a record which represents your app's config, and have callers pass it in
15:04	patchwork	I have that, but then if things need to change, I nest all subsequent operations inside another (with-config … )?
15:05	patchwork	Okay, just checking
15:05	patchwork	pass it around or bindings
15:05	Glenjamin	if it's likely to change, then i'd have it passed, if not, probably bindings
15:05	Glenjamin	try it, see what feels better
15:05	ppppaul	i usually make my config a s3 object that my app requests on launch
15:06	ppppaul	hope s3 doesn't go down
15:06	patchwork	Okay, got it
15:06	patchwork	thanks all
15:07	technomancy	s3 doesn't go down
15:07	ppppaul	patchwork, your config could be read in by a file for any function that wants it
15:07	technomancy	it has "availability incidents"
15:07	ppppaul	this is nuts, though...
15:07	patchwork	ppppaul: I would rather not read a file every time I want to call a function!
15:07	ppppaul	you could memoize the read
15:08	ppppaul	it could have a TTL
15:08	patchwork	I see now that I want these things to work independently of any global values
15:08	patchwork	I really have no way around just passing an extra arg to everything, rather than relying on a var for values to make something work
15:10	ppppaul	you could use (bindings [....
15:11	ppppaul	but, personally i find that a bit hair if it's all over my code
15:11	ppppaul	i like passing around thread locals that have no global reference
15:11	ppppaul	maybe 'thread local' is the wrong term
15:25	svedubois	I am using the ClojureScript bREPL cljslein from https://github.com/laurentpetit/cljslein.
15:25	svedubois	When I try to load files from resources/public, the browser gives me and error, that the files are not in the adress http://localhost:9000, although they are there.
15:25	svedubois	How I can add static resources to be served by the http server?
15:31	stian_	So every other website in the known universe works on my computer, but inexplicably clojurewerkz.org and everything under the same IP is blocked... (It's my private computer). No idea how this happened, any idea where I should look?
15:31	stian_	Traceroute uses the right IP but has no route to host.
15:36	SegFaultAX	seancorfield: Do people still use CFML? ;)
15:36	svedubois	Is the function of PART 2 equivalent to the function of PART 1? https://www.refheap.com/paste/14116
15:43	melipone	hello! I have (ns xyz.foo (:require [xyz.bar :as abc])) I get the error that "namespace xyz.bar is not found"
15:43	melipone	I know it's a leiningen question but nobody answered over there
15:43	svedubois	because the function of PART 2 doesn't work...
15:44	SegFaultAX	melipone: My guess is xyz.bar isn't in your classpath.
15:45	melipone	sorry, it's working now. something must have been wrong
15:46	melipone	privmsg segfaultax thanks!
15:46	SegFaultAX	melipone: No problem. No need for a PM. :D
15:48	tomoj	what's the use of a nullary :roles fn in friend?
15:49	tomoj	I was thinking "oh, I can pass a function instead of a constant set of roles, great"
15:49	tomoj	I guess I can give people random roles now
15:49	mikerod	Is there a simple way to get the name of a function? Example: (name-of (fn named-anon-fn [x] x)) ;= named-anon-fn
15:50	amalloy	mikerod: no
15:51	mikerod	:(
15:51	svedubois	Any suggestion about the function PART2 from https://www.refheap.com/paste/14116
15:51	svedubois	?
15:51	amalloy	why do you care what a function's name is? that shouldn't ever affect your computation
15:54	mikerod	amalloy: You're right. This was just for testing purposes. I was making a function that took a series of predicate functions and wrapped each one with `clojure.test/is` so that I'd have details of what predicate failed.
15:55	amalloy	(str (class f)) has enough information for you to figure out where the function comes from, if it's just for manual inspection
15:55	mikerod	`clojure.test/is` uses unquote on the unevaluated form passed in though, so I was not getting an error message that could show me the actual function name. I was getting the name of the symbol bound to the predicate itself within the function.
15:55	amalloy	&(str (class ((fn a [] ((fn b [] b))))))
15:55	lazybot	⇒ "class sandbox10042$eval13915$a__13916$b__13917"
15:57	mikerod	amalloy: Thanks, that should be reasonable enough for the sort of test failure message I am trying to produce.
16:19	TimMc	amalloy: It matters when I'm computing a log message.
16:30	tieTYT2	https://www.refheap.com/paste/bbeab2dd238bc989adbeae183
16:30	tieTYT2	that keeps on telling me "No need to call RT.init() anymore" but it only runs correctly if I call RT.init()
16:34	tieTYT2	I guess the bottom of this has the solution, but it feels like a hack: http://dev.clojure.org/jira/browse/CLJ-1172
16:36	tieTYT2	i don't know what's wrong with RT.load, but it errors about not being able to find file paths that getResourceAsStream can find
16:37	holo	hi
16:39	SegFaultAX	holo: Ahoy.
17:03	tomoj	oh, I get it, you return a different nullary roles fn per user. so friend-oauth2 gives the same roles to everyone
17:48	pl6306	How do I write a map to stream? i.e. spit but to a stream instead of a file
17:48	gfredericks	rebinding out is one way
17:48	technomancy	are you sure spit doesn't work?
17:49	pl6306	I want to write it to memory stream compress it then send it via http post
17:53	pl6306	If i rebind out what do I use to print the object? prn?
17:55	mindbender1	Is there a faster way of tracing unmatched delimiter errors?
17:56	hiredman	use paredit
17:57	mindbender1	hiredman: thanks. Is there a way to enable it globally
18:00	mindbender1	laziness
18:08	mchampin	who mchampin
18:09	sohail	ok, dumbass question... with nrepl, I do C-c M-n to switch the repl to the namespace, but C-x C-e gives me unable to resolve 'symbol-in-namespace' error
18:18	mchampin	sohail: did you eval the ns declaration in your slime buffer too?
18:19	sohail	mchampin, it's in the right namespace, yeah
18:19	technomancy	sohail: nrepl.el is annoying about refusing to run if you haven't done C-c C-k in the buffer already
18:20	sohail	technomancy, that was it
18:20	technomancy	doesn't matter if the namespace has been loaded another way; it has to be compiled explicitly through nrepl.el =(
18:22	sohail	technomancy, is nrepl an active project?
18:22	technomancy	sohail: not extremely active
18:22	technomancy	nrepl and nrepl.el are different though
18:22	technomancy	nrepl.el has bursts of activity
18:22	sohail	I was thinking of nrepl.el, yeah
18:23	technomancy	I think there's a workaround for that nrepl.el "feature"
18:23	technomancy	hm; or maybe it's fixed in the latest version?
18:28	justin_smith	that is pretty much why I am a swank-using dinosaur
18:29	technomancy	he at least agreed it was a bad idea; I don't remember if the fix is in a release yet
18:30	patchwork	Yep, still using swank as well
18:30	patchwork	tried nrepl, still not there
18:30	justin_smith	just because of the namespace annoyance, yeah?
18:31	amalloy	i'm sad i'll have to get off swank soon, since it doesn't work with 1.5
18:31	technomancy	amalloy: tcrayford fixed it
18:32	amalloy	technomancy: damn. now i'm sad i'll have to figure out how to upgrade swank, instead
18:32	tcrayford	I did?
18:32	technomancy	oops I wasn't supposed to tell you
18:32	technomancy	oop
18:32	technomancy	oops
18:32	technomancy	tcrawley
18:32	technomancy	that's some serious nested russian-doll failures there
18:33	justin_smith	(.getNextException brain)
18:33	technomancy	heh
18:35	tcrayford	technomancy: I'm sure dhh would be proud
18:35	technomancy	I had a workaround for the nrepl.el ns problem but I must have deleted it for some reason
18:35	amalloy	technomancy: not supposed to tell because...? swank is deprecated?
18:35	technomancy	the only reason I can think of is that it was fixed
18:35	technomancy	tcrayford: I'm not up on the latest rubby dramas; what is it now?
18:36	technomancy	amalloy: yeah, we're all conspiring to get you off it.
18:36	technomancy	Raynes is going to be pissed that I spilled the beans
18:36	amalloy	true that
18:36	tcrayford	technomancy: nothing really, just rails does some weird shit with nested fragment caching in 4.0 (it calculates md5s of subcaches, and uses them as cache keys so). It's called "russian doll caching" in ddh parlance
18:37	tcrayford	also note that feature was implemented by dhh parsing erb files using a regex (and this is in rails core)
18:37	Raynes	tcrayford: Please stop fixing that shit.
18:37	technomancy	sweet
18:37	Raynes	Oh. tcrawley\|away then?
18:37	technomancy	erb is the worst
18:37	technomancy	I tried to write an emacs mode for erb, but it's actually impossible to do well
18:37	amalloy	tcrayford: that summary is like a russian doll of awfulness, itself
18:38	technomancy	so now I have to go around telling people to stop using my softwares
18:38	technomancy	and sometimes they don't listen
18:38	tcrayford	technomancy: so you know how you're not meant to parse html using regex? You know how ruby is horrible to parse anyway! Let's do both at once!
18:38	patchwork	You don't even need .rb files, just code straight in the template!
18:39	technomancy	tcrayford: engineerinating
18:39	tcrayford	enginurinating
18:42	gdev	is anyone preparing for Clojure cup? I'll definitely need a personal trainer and a montage
18:45	callen	parsing erb with...regex?
18:46	tcrayford	callen: in rails core? Yes. Understand that this is a thing. Understand it
18:46	patchwork	callen: I don't see what could go wrong with that
18:46	callen	I knew better than that before I was old enough to rent an apartment.
18:46	gdev	erb? enterprise ruby bean?
18:46	tcrayford	true story, in haskell land nobody actually uses regex anymore, so the regex libs aren't maintained well, because parsec is so damn good.
18:47	callen	tcrayford: parsec is cheat mode.
18:47	patchwork	That is the promised land
18:47	xeqi	can't wait till everyone is using https://github.com/Engelberg/instaparse or better here
18:47	callen	tcrayford: I've seen some neat parsing stuff for Clojure. Did you see that LL(1) one?
18:47	callen	oh, there's what I was thinking of.
18:48	gdev	guarantees in life: death taxes parsing errors
18:48	tieTYT2	is there an "interleave-by" function?
18:49	tieTYT2	I want to join this object by its id field and put the ones with null id in its own group
18:49	tcrayford	group-by?
18:49	tieTYT2	well I have two collections
18:49	tcrayford	two collections of maps?
18:49	tieTYT2	lists
18:50	mthvedt	callen: the LL(1) one is kern
18:50	callen	mthvedt: good call, thank you.
18:50	tcrayford	tieTYT2: paste some sample data or something?
18:51	svedubois	(apply create-sphere ["a" "b" "c"]) only creates one sphere for the first element (a), but not for the rest (b and c).How I can create one sphere for "each" element?
18:51	tieTYT2	(1 2 3 5) (2 3 4) -> ([1] [2 2] [3 3] [4] [5])
18:51	tieTYT2	something like that. Except each number is actually an object
18:52	gdev	looks a problem i saw on 4clojure
18:52	gdev	*looks like
18:52	svedubois	I am using this function: https://www.refheap.com/paste/14121
18:53	tieTYT2	in haskell, I think this might be a zip-with
18:54	tieTYT2	naw nm
18:57	Raynes	tieTYT2: Sounds like you should have a map to update.
18:57	Raynes	This is what a merge is for.
18:57	tieTYT2	hah I was just going to look for that
18:57	tieTYT2	because I can easily turn this into a map of {id obj}
18:57	Raynes	It looks like you're wanting to merge two lists, which is meh.
18:57	Raynes	Yeah, I'd look into building the data into maps.
18:58	justin_smith	then that looks kind of like a group-by
18:58	tieTYT2	oh but I don't want to overwrite :T
18:59	tieTYT2	here's why I'm doing this: One list represents the db state, one list represents what it's about to change. I'm going to pass it to a program that knows how to figure out the changes that happened (eg: This one got added. This one had this field changed to x) But the program depends on the order of the elements lining up and they don't
18:59	tieTYT2	about to change=about to change to
19:00	justin_smith	,(group-by :obj [{:obj 1} {:obj 2} {:obj 2} {:obj 3} {:obj 4} {:obj 4}])
19:00	clojurebot	{1 [{:obj 1}], 2 [{:obj 2} {:obj 2}], 3 [{:obj 3}], 4 [{:obj 4} {:obj 4}]}
19:00	justin_smith	I think you can do what you want with that (?)
19:00	tieTYT2	nice that's useful
19:00	tieTYT2	but it seems like just a step
19:01	tieTYT2	merge would work if it didn't overwrite
19:01	tieTYT2	oh but i can probably use merge-with
19:01	tieTYT2	i could do merge-with vector me thinks, i'll try
19:02	tieTYT2	thanks for the help guys
19:05	svedubois	Any advice about creating one sphere for "each" element with (apply create-sphere ["a" "b" "c"]) using this function ? https://www.refheap.com/paste/14121
19:09	justin_smith	are you looking for a definition for create-sphere? should "a" "b" "c" each result in a sphere?
19:09	svedubois	Yes
19:09	svedubois	but it creates only the sphere a
19:10	justin_smith	(defn create-spheres [& xs] (doseq [x xs] (create-mesh x))) ?? maybe? I think maybe you need to do something else to x before the create-mesh call, but that depends on how create-mesh is defined
19:10	justin_smith	or that is X/mesh
19:15	svedubois	I use the name of a b c to load different mesh (X/mesh.)
19:18	justin_smith	ok, yeah, so something like what I pasted above (I added an s to the name since it is for making an arbitrary number of them)
19:21	svedubois	(doseq [x ["a" "b" "c"]] (apply create-mesh x))
19:21	svedubois	It works
19:21	svedubois	thanks
19:22	justin_smith	the apply is not needed there
19:22	justin_smith	(doseq [x ["a" "b" "c"]] (create-mesh x))
19:23	dobry-den	i love the aesthetics of this language. even that simple expression
19:23	justin_smith	there is a poetry to it
19:24	dobry-den	my source code looks like silhouettes of spacecrafts
19:26	n_b	tieTYT2: I think you can just do (map vector)
19:26	n_b	,(map vector '(1 2 3 4) '(1 2 3))
19:26	clojurebot	([1 1] [2 2] [3 3])
19:27	n_b	oh, You want the ones after as well. >>
19:30	tieTYT2	n_b: yep, thanks though
19:50	gf3	Bodil: Oh hai, BODOL looks awesome btw. It's basically all of my hopes and dreams refined into a delightful little language.
19:52	gdev	can you use BODOL in catnip?
20:27	hyPiRion	Oh, there should be a #BODOL channel over here
20:31	gdev	,(#(= % %) ()())
20:31	clojurebot	#<ArityException clojure.lang.ArityException: Wrong number of args (2) passed to: sandbox$eval36$fn>
20:33	scottj	,(#(= %1 %2) ()())
20:33	clojurebot	true
20:33	gdev	,(#(= % %) (*))
20:33	clojurebot	true
20:33	amalloy	,(= () ()) ;; are we racing to make it simpler?
20:33	clojurebot	true
20:36	gdev	grats on being our swearjure race winner :)
20:36	amalloy	no, the winner would be ##(=)
20:36	lazybot	clojure.lang.ArityException: Wrong number of args (0) passed to: core$-EQ-
20:36	amalloy	aw man, since when does = not accept no args?
20:36	amalloy	just ,true then, i guess
20:38	hyPiRion	,(#(= *)) ;?
20:38	clojurebot	true
20:38	hyPiRion	or just ##(= *) I guess.
20:38	lazybot	⇒ true
20:39	amalloy	true is shorter though
20:39	hyPiRion	true enough
20:39	metellus	,(=) ; is this anything?
20:39	clojurebot	#<ArityException clojure.lang.ArityException: Wrong number of args (0) passed to: core$-EQ->
20:39	gdev	##(= * +)
20:39	lazybot	⇒ false
20:40	gfredericks	I can't remember if (=) ought to make sense or not
20:40	hyPiRion	no sense
20:40	gfredericks	I feel like this has been argued before
20:40	hyPiRion	yeah
20:40	gfredericks	,(distinct?)
20:40	clojurebot	#<ArityException clojure.lang.ArityException: Wrong number of args (0) passed to: core$distinct-QMARK->
20:40	metellus	,(identity)
20:40	clojurebot	#<ArityException clojure.lang.ArityException: Wrong number of args (0) passed to: core$identity>
20:40	hyPiRion	gfredericks: yeah, distinct? man.
20:41	hyPiRion	,(distinct? 1 2)
20:41	clojurebot	true
20:41	hyPiRion	,(distinct 1 2) ; oh, a vector?
20:41	clojurebot	#<ArityException clojure.lang.ArityException: Wrong number of args (2) passed to: core$distinct>
20:41	gfredericks	yeah that bothers me too
20:42	gfredericks	especially when you go the other way and get a silent true
20:42	hyPiRion	oh yeah
20:43	gfredericks	huh. you could write a replacement clojure.core and put it out as a library.
20:43	hyPiRion	or just fork it
20:43	gfredericks	Clojure Enterprise Edition would obviously have to be the name
20:43	gdev	,(#_(@#$%&-+:;')(= +))
20:43	clojurebot	#<RuntimeException java.lang.RuntimeException: Invalid token: %&*-+:>
20:43	gfredericks	hyPiRion: forking it means having to port all the libs
20:44	hyPiRion	oh dang, right
20:44	gfredericks	clj-http enterprise edition
20:44	gfredericks	I just realized that's a cool aspect of the minimal-special-forms approach
20:47	gdev	cant wait for the day i see on the mailing list "[ANN] enterprise ecommerce Clojure "
20:50	hyPiRion	"Swearjure-machine implemented on an FPGA" would be fun to watch too
21:20	pppaul	i'm in need of some nice zipper tutorials
21:20	pppaul	clojure zippers or real zippers, both are good for me
21:20	pppaul	if anyone can link :)
21:21	brehaut	pppaul: apparently http://www.haskell.org/haskellwiki/Zipper is good, but it confused me
21:21	brehaut	pppaul: http://www.youtube.com/watch?v=1IYgSesN5Fg might help
21:22	pppaul	ahahaha
21:22	pppaul	zipper simulation...
21:23	brehaut	music by a dying gameboy
21:24	xeqi	zippers are like a space suit
21:29	pppaul	the second zipper video helped me out a lot… i am now confident that i can repair my coat
21:30	amalloy	interesting, brehaut. do you happen to know what zipper's monad instance looks like? nothing makes a lot of sense to me, but that wiki page claims there's a monad instance for a zipper over a binary tree
21:31	brehaut	amalloy: no idea sorry; zippers in haskell have remained opaque for me
21:31	brehaut	also in clojure
21:46	gdev	could've sworn I saw a video by Alex Miller on tree editing with zippers
21:48	gdev	even better, clojure conj video about zippers from Luke Vanderhart https://www.youtube.com/watch?v=6c4DJX2Xr3k
22:02	gdev	what a good book, code examples make me cringe though http://natureofcode.com/book/introduction/
22:03	gdev	and the part where he says "objects have functions"
22:07	gdev	but the codes on github, so I might as well fork it and rewrite it in clojure instead of hanging around here talking to myself
22:44	gdev	lazybot: fortune
22:44	lazybot	Difficulty at the beginning usually means ease at the end...except in bed
22:45	gdev	so true
22:45	gdev	lazybot: fortune
22:45	lazybot	I thought you said you were going to go do something
22:46	gdev	okay -_-
22:51	jcromartie	I give up. I'm going back to Rails!
22:51	jcromartie	for this
22:51	jcromartie	I'll stick Varnish in front of a few paths
22:51	jcromartie	and that will solve the performance issues
22:51	jcromartie	but the paralysis and (self-imposed) NIH syndrome is too much for me
22:56	uvtc	How can I remove one item from a vector? That is, I've got `[:a :b :m :n :b :x]` and I want to remove the first :b, and have remaining `[:a :m :n :b :x]`. If I do `(remove #{:b} [:a :b :m :n :b :x])` it of course removes both :b's... I just want to remove the first one I encounter.
22:57	uvtc	Hm. I probably want to find the idx of the first :b, and then split on it ... hm.
22:59	jcromartie	removing is something vectors are not good at
23:00	jcromartie	but yeah
23:00	uvtc	jcromartie: right. I suppose I want to build a new vector but with that one item left out.
23:01	jcromartie	,(let [v [:a :b :c :d :e :f :g] idx 2] (vec (concat (take idx v) (drop (inc idx) v)))
23:01	clojurebot	#<RuntimeException java.lang.RuntimeException: EOF while reading>
23:01	jcromartie	derp
23:01	metellus	maybe something with ##(partition-by #{:b} [:a :b :m :n :b :x])
23:01	lazybot	⇒ ((:a) (:b) (:m :n) (:b) (:x))
23:02	jcromartie	,(let [v [:a :b :c :d :e :f :g] idx 2] (vec (concat (take idx v) (drop (inc idx) v))))
23:02	clojurebot	[:a :b :d :e :f ...]
23:03	uvtc	jcromartie: Yes. Though, I don't yet know the index of the first :b. I think I first need to find all the indices where there's a :b. Something like (map #(= % :b) my-vec)...
23:03	jcromartie	,(.indexOf [:a :b :c :b] :b)
23:03	clojurebot	1
23:04	jcromartie	sort of undocumented, but that's the simplest
23:04	uvtc	jcromartie: heh
23:04	uvtc	jcromartie: thanks. :)
23:05	jcromartie	,(map-indexed identity [:a :b :c])
23:05	clojurebot	#<ArityException clojure.lang.ArityException: Wrong number of args (2) passed to: core$identity>
23:05	jcromartie	oh yeah
23:05	jcromartie	,(map-indexed vec [:a :b :c])
23:05	clojurebot	#<ArityException clojure.lang.ArityException: Wrong number of args (2) passed to: core$vec>
23:05	jcromartie	,(map-indexed vector [:a :b :c])
23:05	clojurebot	([0 :a] [1 :b] [2 :c])
23:06	jcromartie	HURRRR
23:06	metellus	,(split-with #(not (#{:b} %)) [:a :b :m :n :b :x])
23:06	clojurebot	[(:a) (:b :m :n :b :x)]
23:06	metellus	use that
23:06	gdev	lazybot: whatis this
23:06	lazybot	this is i don't even
23:06	uvtc	hehe
23:08	uvtc	Oh, I was giggling at what lazybot said. metellus : /me looking at what you wrote...
23:13	metellus	uvtc: ##(let [[foo bar] (split-with (comp not #{:b}) [:a :b :m :n :b :x])] (concat foo (rest bar)))
23:13	lazybot	⇒ (:a :m :n :b :x)
23:19	uvtc	metellus: Thanks.
23:19	gdev	lazybot: whatis (+2_2)
23:19	lazybot	(+2_2) is 5 for extremely large values of 2
23:39	howdynihao	do a lot of people use eclipse with clojure?
23:41	uvtc	howdynihao: sure. A number of folks do.
23:41	brehaut	howdynihao: its probably the second or third most popular enviroment
23:41	brehaut	but its maintained and has good support
23:41	howdynihao	http://stackoverflow.com/questions/2352020/debugging-in-clojure is this the only ways to do debugging?
23:43	howdynihao	is the first emacs?
23:43	brehaut	likely yes
23:44	howdynihao	what would you say the second is if not eclipse?
23:44	brehaut	ccw and vi would be my guess for second
23:44	brehaut	cemerick's survey might have numbers
23:44	cemerick	emacs > vi > eclipse IIRC
23:45	howdynihao	whats ccw?
23:45	brehaut	eclipse mode
23:45	brehaut	counter clockwise
23:48	SegFaultAX	Whoa did github just keel over?
23:48	n_b	yup
23:49	n_b	But I don't understand the surprise :P
23:49	TimMc	SegFaultAX: What did you do!
23:49	uvtc	Was about to ask the same thing.
23:49	SegFaultAX	http://www.downforeveryoneorjustme.com/github.com
23:49	n_b	maybe their new arrays are buggy after all
23:51	gdev	clojurebot: whatis ur favorite IDE
23:51	clojurebot	qcon slides is http://qconlondon.com/london-2009/file?path=/qcon-london-2009/slides/RichHickey_PersistentDataStructuresAndManagedReferences.pdf
23:51	gdev	lazybot: whatis ur favorite IDE
23:51	lazybot	ur is not a word! (╯°□°）╯︵ ┻━┻
23:52	gdev	lazybot: whatis your favorite IDE, sorry
23:52	lazybot	your is better ┬──┬ ﾉ(°—°ﾉ) I'm fine
23:53	SegFaultAX	lazybot: You need a nap.
23:54	gdev	lazybot: fortune
23:54	lazybot	"oh hai"
23:54	uvtc	metellus: re. dropping the first ocurrence of some item in vector; this may be clunky, but it makes sense to me: https://www.refheap.com/paste/14125
23:56	pl6306	How do I spawn another process from clojure (running on windows)? Thanks!
23:57	SegFaultAX	uvtc: That seems slow. Why not just subvec?
23:58	n_b	pl6306: (.new (Thread. #(some_fn))
23:58	uvtc	Actually, it seems to me like there should be a very easy way to ask, "what's the index of the first $foo in this list?", but I'm not seeing it right now.
23:58	SegFaultAX	n_b: That's a thread, not a process.
23:58	pl6306	No I mean an OS process
23:59	SegFaultAX	,(.indexOf [1 2 3] 2)
23:59	clojurebot	1
23:59	n_b	You mean like shelling out to something else?
23:59	SegFaultAX	uvtc: ^