#clojure – 2015-03-06

2015-03-06

04:09	stardiviner	test
04:11	godd2	1 line run; 1 failure; 0 successes
04:34	TEttinger	wow, sleepy in here today. I see two messages in my scrollback
04:34	chiffr	TEttinger: Friday daze ;)
04:57	zot	i have a midje test that triggers a parked thread, blocking my tests. is there any way short of restarting repl to manage/handle this case?
05:08	noidi	you could do the operation in a future and deref it with a timeout
05:14	schmir	what's the best clojure book for clojure newbies?
05:16	mnngfltg	schmir, I like this one: http://shop.oreilly.com/product/0636920013754.do
05:18	schmir	mnngfltg: LOL 'No, Parentheses Actually Won’t Make You Go Blind'
05:23	schmir	mnngfltg: Thanks. I'll buy that for my new coworker...
05:31	mnngfltg	schmir, you're welcome
05:31	zot	noidi: that's what i ended up doing, copying a macro to handle it. it's not perfect, but for testing, won't be too evil as long as the contents don't spawn tooooo many orphanable threads :)
06:16	noncom\|2	i am working in a repl, but i have to change java code frequently. is there a way to reload a java class?
06:52	noncom\|2	wow, it is so friday here :)
06:57	jballanc	noncom\|2: more likely it's just too early in negative-UTC-offset-world
06:57	noncom\|2	right, could be!
06:57	noncom\|2	it is about 7 am in new york i guess
06:58	jballanc	yup
07:02	ordnungswidrig	how can I wait for a list of channels to unblock in core.async? (map <!! list-of-channels) ?
07:06	hyPiRion	Pretty sure you want something that's not lazy for that
07:06	hyPiRion	like, (dolist [ch list-of-channels] (<!! ch))
07:08	ordnungswidrig	hypririon: ok, now assume I have an error channel where which I will read alternatively. i.e. if there's a val in the error channel then use that, else the list returned.
07:09	ordnungswidrig	I tried something like (alts!! [err-chann (async/map <!! list-of-chans)])
07:18	agarman	having an issue with cider & nREPL --> https://www.refheap.com/98150 ... any chance someone has an idea of what I borked?
07:19	the_frey	I find that when I hit the cider and write clojure it all goes tits up too
07:20	agarman	this is recent issue for me. I was doing Java stuff for a couple months and now back to Clojure and made the mistake of updating emacs-live and my lein profiles.clj
07:34	wizzo	hi. is there a way to get just a section of a byte-array. like just from byte 5 to 10 or whatever
07:39	muhuk	wizzo: you can convert it to a seq, or you can copy those elements to a new array.
07:41	wizzo	muhuk: it is 12mb i wasn't sure if it was a good idea to make it a seq or not
07:41	wizzo	i'll probably just not read the whole thing in memory if that's an insane idea
07:44	Glenjamin	wizzo: possible a combination of (byte-array) and a (for)
07:46	wizzo	glenjamin: do you have an example of that working? i'm not really getting it from the docs
07:47	Glenjamin	,(let [b (byte-array (range 100))] (byte-array (for [i (range 10 20)] (aget b i))))
07:47	clojurebot	#<byte[] [B@418700a3>
07:47	Glenjamin	something along those lines
07:48	wizzo	thank you! i'll have a play around with it
08:09	sandbags	anyone know how to shut up the "cljx no longer provides Leiningen hooks; please use :prep-tasks in your project.clj instead" messages every time you run a lein command with cljx installed? Esp. annoying when I do use :prep-tasks
09:14	profil	Hey guys, I am building a tcp server and I want to use PING/PONG messages just like irc. Right now I use a loop inside a future to send ping messages every Nth second. Would it be better to use core.async's go block instead? The future macro will create a new thread which I think may a bit heavy for this case. Any ideas?
09:16	sujeet	profil, if you're doing aio, use aio
09:16	sujeet	you don't need to thread it
09:16	profil	sujeet: I am using aleph and just mapping over the stream, how would I fit my ping loop inside that?
09:49	ocharles_	does anyone know if it's possible to use s/check (prismatic schema) on a record, where the schema was defined with s/defrecord?
09:49	ocharles_	Right now, I get "not (instance? type)" which is valid, but I only want to valid the underlying map against the same schema
09:49	whidden	/msg NickServ identify pegasus
10:16	matthewwest	I'm aiming to be a part of GSOC this year, and I'm especially interested in maybe adapting clojure/tools.reader to be able to run on a JS runtime such as Node.js.
10:16	matthewwest	I'm looking to understand why it currently doesn't work, but not how to get started.\
10:17	matthewwest	Does anyone know if clojure currently uses clojure/tools.reader to read in sourcecode?
10:17	Glenjamin	matthewwest: jvm clojure currently doesn't use tools.reader
10:17	Glenjamin	but clojurescript does
10:18	Glenjamin	it doesn't currently run on Node.js because there's a bunch of JVM-specific things in the codebase
10:18	matthewwest	Alright, that's helpful.
10:18	Glenjamin	there's some WIP on tools.reader here: https://github.com/nasser/tools.reader/tree/nodejs
10:18	Glenjamin	i dunno how far along it is
10:18	matthewwest	Is it an eventual language target to use tools.reader for the JVM?
10:19	Glenjamin	certainly none of the tests are ported
10:19	Glenjamin	no idea, i suspect not but Bronsa will know more if he's around
10:20	matthewwest	Alright, I'll just need to poke around and figure out what's going on.
10:21	matthewwest	Once my academic term ends I'll have a bit more time to devote (at least until the next one starts)
10:22	Bronsa	Glenjamin: matthewwest no, no plans to make t.reader the default Clojure reader
10:23	matthewwest	Is that because since it's a hosted language anyway, there's no purpose in bootstrapping?
10:26	Bronsa	a number of reasons, since clojure is not self-hosted there's no point in using a slower reader just for the sake of having it written in clojure
10:26	Bronsa	also there would be bootstrapping issues
10:30	matthewwest	Thanks
10:40	Ven	hi -- people using the cursive plugin here? It's completly failing to resolve defn, ns, defmacro and the others :). I have a sdk configured
10:43	kras	Exception in thread "main" java.lang.UnsupportedClassVersionError: clj_antlr/ParseError : Unsupported major.minor version 51.0
10:43	kras	why do I get this error when I "lein run"?
10:44	kras	something to do with the JRE version?
10:55	profil	sujeet: How do you mean use aio? I can use manifolds periodically, but how do I get it to stop executing when the stream is closed? And how do I create a periodic loop without using either clojure's future or manifold.deferred's future?
11:25	octe	i'm listening to modification events for files with inotify, and when a file is completly written i want to do something. to ensure it's completly written i want to wait a few seconds after the last modify event for each file and then do something
11:25	octe	what would be a good way to do that?
11:30	muhuk	octe: Thread/sleep ?
11:30	justin_smith	octe: sounds like you want a debounce
11:31	octe	justin_smith, yeah
11:31	Glenjamin	https://gist.github.com/loganlinn/4719107#file-debounce-clj-L12
11:31	octe	it's pretty easy to do in javascript since it's single threaded
11:31	octe	cool, thanks
11:31	Glenjamin	there's an mildly annoying lack of license on that gist
11:32	justin_smith	debounce should be in clojure.core, or at least in core.async
11:32	justin_smith	and I think it can be done without two atoms
11:39	timvisher	is there anything that's more 'battle tested' than loom as far as nice clojure libraries for dealing with graphs
11:55	justin_smith	octe: Glenjamin: this one is public domain. Since you always want the last bounce's time when debouncing, it doesn't need atoms. Maybe it should have a locking block for the odd case where two bounces were waiting on the same time stamp? https://www.refheap.com/98153
11:56	justin_smith	another difference is that each debounce call can provide its own args, only the args for the last one before the timeout are used
11:57	justin_smith	*each call to the debounced function
11:57	justin_smith	need coffee
11:58	octe	why an array?
11:58	justin_smith	octe: because it is mutable
11:59	justin_smith	I guess any Box would have worked though
12:00	justin_smith	*any mutable Box
12:01	justin_smith	octe: so each attempt puts its timestamp in the box, and only runs the function if after waiting the required time its timestamp is still in the box
12:02	justin_smith	since the timestamp is intentionally "last writer wins", it is fine to just let the calls race
12:04	octe	hm, it doesn't seem to work the same
12:05	octe	i'll try to see how
12:05	justin_smith	octe: mine runs in the thread that calls it
12:05	justin_smith	so you can choose to put a call in a future, or to just wait for it to complete / cancel in your own thread
12:06	justin_smith	(that may not be the only difference)
12:07	octe	yes, that was one thing
12:08	vas	justin_smith how do you take your coffee? carries out tray with spoons and variegated sundries
12:08	octe	i think that in the first, while the debounced function is running, further calls to it doesnt run it multiple times
12:08	octe	if you see
12:08	justin_smith	vas: black
12:08	vas	well then pitches tray out window
12:09	justin_smith	octe: nor should mine (unless you mean after the debounce period, mine will run multiple times, but with a debouncing interval enforced)
12:11	justin_smith	eg. one use of debouncing is to have a debounced message handler or channel, where you want repeated invocation, but constraining the rate with the debounce logic
12:12	octe	well, i only want one to run for each file so it's better to ignore further invocations while it's actually being processed
12:12	octe	which is a property the first implementation seems to have
12:13	justin_smith	yeah, if you want one-shot logic that could be tacked onto my version, but isn't inherent to it
12:13	octe	how would i do that? :)
12:16	justin_smith	octe: simplest version I can think of is to close over a delay with the function - (let [status (delay (f status)) final-status (debounce #(deref status))] ...)
12:16	justin_smith	in that manner, the delay only does the work the first time, it's cached afterward
12:16	justin_smith	I missed the wait arg for the debounce there of course
12:33	lvh	Is there something cool in Clojure for wrapping POJOs that are basically just data containers?
12:34	lvh	e.g. I have this class with ctor GroupConfiguration(String name, int cooldown, int minEntities, int maxEntities, Map<String,String> metadata); I'd be nice if I could autogenerate something that knew how to turn a map with the appropriate keys into one of those things. Preferably automagically with introspection run once at compile time :-)
12:34	justin_smith	lvh: for accessing them or creating them? for the latter we just use hashmaps
12:34	lvh	justin_smith: I'm interfacing with an existing Java API, I want to use hashmaps on the clj side but I can't; the Java API really wants this POJO
12:40	Glenjamin	(doc bean)
12:40	clojurebot	"([x]); Takes a Java object and returns a read-only implementation of the map abstraction based upon its JavaBean properties."
12:41	Glenjamin	i dunno about the reverse though
12:48	justin_smith	lvh: it would be easy enough with deftype, except for the fact that you can only implement methods that are in an interface, so you would need to define a custom protocol or interface for the type that had the standard get/set methods
12:49	justin_smith	lvh: it's one of the places where clojure's opinionated nature starts to show
12:51	puredanger	I wrote a macro that can take a map and call the appropriate setters on a Java object here:
12:51	puredanger	http://stackoverflow.com/questions/27308061/whats-the-idiomatic-way-to-do-this-java-function-in-clojure/27308254#27308254
12:51	justin_smith	puredanger: interesting, I think something very much like that is used by a c3p0 wrapper I use
12:52	Glenjamin	"unbean" would be a fun name for that :)
12:52	lvh	puredanger: Thanks for the pointer :-) This POJO does have one thing going for it: it's immutable ;-)
12:52	justin_smith	Glenjamin: texas-style
12:52	lvh	so I guess some ctor inspection is in my future
12:52	puredanger	lvh: well that's good :)
12:52	Glenjamin	https://github.com/arohner/unbean
12:52	puredanger	the downside of a positional constructor is of course needing to know the positions
12:52	puredanger	but certainly seems like something you could abstract
12:53	Glenjamin	i guess bean isn't quite accurate, as this is contructor in, getters out
12:53	lvh	puredanger: right. But I should be able to do all of that introspection at compile time, right?
12:53	octe	justin_smith, cool, that works! the delay i mean
12:54	puredanger	sure, if you use reflection. and assuming there is some standard mapping from param names to map fields
12:54	puredanger	actually, do you get param names in reflection?
12:54	puredanger	I know this was an old problem, not sure of current state
12:54	iamjarvo	is there a way to update an atom asynchronously>
12:54	lvh	iamjarvo: reset!
12:55	puredanger	that's not asynchronous
12:55	lvh	Huh, it's not?
12:55	justin_smith	(future (swap! a f))
12:55	justin_smith	no need to deref the future if you don't care about the return value
12:55	puredanger	swap! and reset! guarantee that the change is complete when they return
12:55	lvh	ah
12:56	puredanger	agent send is asynchronous
12:56	puredanger	or wrapping in future
12:56	iamjarvo	lvh thanks
12:56	puredanger	although the cost of wrapping in future is likely significantly higher than the reset!
12:56	lvh	iamjarvo: Don't thank me, I gave the wrong answer ;)
12:56	iamjarvo	ha i was just reading about ti
12:56	iamjarvo	it*
12:56	justin_smith	yeah, if you want async update, you may want an agent instead of an atom anyway
12:57	iamjarvo	thanks all
13:12	lvh	puredanger: So, this class does have a Builder nested class, which probably makes the macroing a lot simpler
13:15	bcham	Hey I have a question about hash-maps and their potential key values. It's very straight forward.
13:15	bcham	http://www.codeshare.io/rg0vn
13:16	bcham	why is it, in that code that lines 14 and 15 print nil?
13:18	hiredman	keywords are not numbers
13:19	hiredman	you map has a number as a key, you are looking up the value for a keyword, there is no value, so nil
13:19	bcham	You mean that keywords cannot be numbers? Because shouldn't the (str ) wrap make it into a string and thus can be turned into a keyword?
13:20	justin_smith	bcham: keyword is not the same as key
13:21	bcham	justin_smith: There's my issue I need (name )?
13:21	bcham	it seems
13:21	hiredman	no
13:21	hiredman	look, your map doesn't have keyword keys
13:21	hiredman	a map can have keys that are of any type
13:21	hiredman	keys are not always keywords
13:22	justin_smith	(get {{"apple" "red"} "fruity"} {"apple" "red"})
13:22	justin_smith	,(get {{"apple" "red"} "fruity"} {"apple" "red"})
13:22	bcham	Gotcha, now I understand. My misunderstanding was that "keyword" was doing what "name" actually does. Because the code " (@hash-links (name "112785")) ; nil"
13:22	bcham	works
13:22	clojurebot	"fruity"
13:22	justin_smith	,(= (name "112785") "112785")
13:22	clojurebot	true
13:23	bcham	thank you for humoring my learning.
13:23	justin_smith	bcham: notice in the above silly example with the apple, I use a hash-map as the key in a hash-map
13:24	oskarth	Does anyone know of any good alternative to cljs-ajax?
13:24	bcham	justin_smith: yeah I see that! Thanks
13:29	sritchie	oskarth: what’s wrong with cljs-ajax?
13:30	oskarth	sritchie: tired of all these different places params end up, there's a key called :params on client side, but it can end up in either body, params or query-params depending on various things
13:30	sritchie	oskarth: that’s not cljs-ajax’s fault -
13:30	sritchie	oskarth: that’s the middleware stack on the clojure side
13:30	oskarth	aware, but it complicates things
13:30	sritchie	each middleware that intercepts params merges them into its own key, then merges all of them into :params
13:30	sritchie	oskarth: my pt is you’ll have that problem if you hit your server w/ curl
13:31	sritchie	nothing to do with cljs-ajax
13:31	oskarth	for example, ring-edn and query-params (with format edn) using non-edn format
13:32	oskarth	just asking for an alternative :) disagree with the diff behaviors for GET/POST etc, don't believe it's necessary
13:40	lvh	So, I'm doing (.. (Something/whatever) (aMethod (:some-key some-map))) a bunch of times. Is there a neat way to only call those methods when (:some-key some-map) isn't nil? Example: https://gist.github.com/lvh/bd35d7506bc0f127cbb9
13:41	lvh	I tried to do it with ->> and when-let but I can't get it to work
13:42	cfleming	Ven: How did you set up your project? With Lein?
13:42	Ven	cfleming: yes
13:42	lvh	Maybe something like (->> (LaunchConfiguration/builder) (when-let [v (:load-balancers lc)] apply #(.loadBalancers))) ?
13:42	Ven	cfleming: a long time before I set up cursive, though :)
13:43	cfleming	Ven: Are your files under a source root? (blue folder in the project view)?
13:43	Ven	cfleming: src/ isn't a blue dir, an in "project settings" there's "excluded" but no way to mark as source
13:44	cfleming	Ven: Right click the folder and you can mark as source
13:44	cfleming	Ven: But if you set your project up with lein the problem is that your src folder isn't configured in your project.clj
13:44	lvh	Except of course (apply #(.someMethod) ..) doesn't really do what you want
13:45	Ven	cfleming: do you have a doc link on how I should configure it in project.clj?
13:45	Ven	cfleming: also I see no link to make it a source folder
13:46	cfleming	Ven: Right click the folder in the project view->Mark directory as->Source folder
13:46	Ven	cfleming: found project.cj config
13:47	cfleming	Ven: Source paths are taken from :source-paths, :resource-paths, :java-source-paths
13:47	cfleming	Ven: Assuming this is Clojure and not CLJS
13:47	Ven	cfleming: alright, much better! it now finds my own defs. but still, any other external defs, even "defn", "ns" and so on so forth are unrecognized
13:48	mgaare	lvh: is .. what you want? you might be looking for doto
13:48	cfleming	Ven: Do you have a Clojure jar attached to your project?
13:48	lvh	mgaare: I'm currently using .., but that doesn't let me express the when-let part
13:48	lvh	mgaare: I don't want to call the method at all when (nil? (:k m))
13:48	Ven	cfleming: if the jar is indeed "clojure-complete", then yes -- but intellij did warn me about not recognizing the jar
13:49	mgaare	lvh: you could take a look at cond->
13:49	cfleming	Ven: Under External Libraries in the Project view, you should have one saying Leiningen: org.clojure/clojure:<some version>
13:50	Ven	cfleming: ah, I don't
13:50	Ven	that's definitely it
13:50	mgaare	in your case it'll be somewhat duplicative
13:50	cfleming	Ven: Do you have clojure as a dep in your project.clj?
13:50	Ven	cfleming: no
13:50	Ven	cfleming: actually! [org.clojure/clojure "1.6.0"]
13:51	lvh	mgaare: Cool! that is kind of what I want; also my current when-let thing seems to work: (when-let [v (:load-balancers lc)] apply #(.loadBalancers % v))
13:51	mgaare	lvh: I've occasionally written utility functions that handle this kind of thing too
13:51	cfleming	Ven: That is very strange. Try refreshing your project (open the Leiningen toolwindow, Refresh)
13:52	cfleming	Ven: I have to go, sorry, I'll be around later on probably
13:52	Ven	cfleming: it does say "there are no lein project to display"
13:52	lvh	yeah, I think this is going to have to be a macro, unless there's a thing that does what the (.method) special form does except where method is given as a string
13:52	Ven	alright, thanks anyhow :)
13:52	Ven	that'll do it, definitely
13:52	cfleming	Ven: Oh - Right click on project.clj, add as lein project
13:52	Ven	I just did :)
13:52	Ven	thanks!
13:52	cfleming	NP - good luck!
13:53	Ven	cfleming: amazing :)
14:12	sritchie	oskarth: for sure -
14:12	sritchie	oskarth: I was just confused as to why you thought an alternative for cljs-ajax would do anything about your params issue
14:12	sritchie	oskarth: since the “problem” is on the ring side, nothing to do with cljs-ajax
14:12	sritchie	oskarth: an alternative is to use jquery: http://api.jquery.com/jquery.ajax/
14:12	sritchie	oskarth: but it won’t help
14:13	oskarth	sritchie: I think it's just some edge case with edn as transport, resolved it by reverting to json
14:13	oskarth	the problem is not on the ring side
14:14	sritchie	oskarth: the ring-edn middleware adds :edn-params and merges them into :params
14:14	oskarth	nope :)
14:14	oskarth	not in this case
14:14	oskarth	was about GET and query-params non-edn format
14:15	oskarth	anyway, have to go. If I were to run into problems again I think I'll go with just a thin wrapper over xhr, seems like the most transparent abstraction to me
14:16	oskarth	a la https://github.com/swannodette/om-sync/blob/master/src/om_sync/util.cljs#L34 or https://github.com/hackerschool/community/blob/master/client/src/community/util/ajax.cljs
14:29	lvh	I wrote a macro that tries to call some methods on a POJO, but there's always a space between the dot and the method name e.g. (. x) instead of (.x), which fails because that name doesn't exist
14:29	lvh	https://gist.github.com/lvh/bd35d7506bc0f127cbb9
14:29	lvh	kw-to-sym is a simple function that turns :some-keyword-name into 'someKeywordName
14:39	aperiodic	lvh: you can't concatenate symbols in a macro in the way you seem to be trying to with #(.~m ...)
14:40	muhuk	lvh: you need to join them as strings, then convert.
14:40	muhuk	lvh: (str "." m)
14:40	Bronsa	or just use the . form
14:40	aperiodic	lvh: you can, however, use the dot special form
14:41	aperiodic	(. object method)
14:41	aperiodic	method doesn't need to have a dot at the front there
14:41	Bronsa	(. % ~m ..)
14:41	muhuk	which is a better idea IMO
14:41	aperiodic	http://clojure.org/java_interop#Java%20Interop-The%20Dot%20special%20form
14:48	ARM9	what's the data structure behind defrecord
14:48	ARM9	does it just use something basic like a c struct? or is it a hash map
14:49	Bronsa	ARM9: for it stores declared fields in class slots, for extra keys it uses a hashmap
14:52	ARM9	class slots, is that a java thing
14:52	ARM9	so it stores the data the way java does for a class?
14:52	Bronsa	ARM9: i mean, as regular class fields yes
14:53	ARM9	alright cool, thanks
14:54	jcromartie	what would cause this type of error?
14:54	jcromartie	java.lang.ClassCastException: foo.Bar cannot be cast to foo.Bar, compiling:(foo.clj:28:3)
14:54	jcromartie	sorry it's anonymized
14:54	jcromartie	this is during aot
14:54	stuartsierra	jcromartie: Protocols and records.
14:54	jcromartie	with a defrecord that implements a protocol
14:54	jcromartie	yes
14:54	jcromartie	so
14:54	jcromartie	what are we doing wrong?
14:54	stuartsierra	It can happen if you reload the a namespace which has already been AOT-compiled.
14:57	jcromartie	this happens during lein uberjar
14:57	jcromartie	literally
14:57	jcromartie	lein clean && lein uberjar
14:57	jcromartie	(sorry I'm not trying to be obtuse on purpose)
15:03	stuartsierra	Something is getting compiled / loaded twice. Sorry, can't be more specific.
15:11	jcromartie	is there a way to see what's being compiled and loaded?
15:12	jcromartie	is (:gen-class) unnecessary?
15:15	the_danko	mr. cfleming, does cursive offer an "organize imports" functionality for java classes? like eclipse does
15:18	stuartsierra	jcromartie: `:gen-class` is unlikely to be the issue.
15:22	jcromartie	I'm trying to create a minimal test case to reproduce
15:22	jcromartie	it's very strange
15:24	stuartsierra	Some of the AOT loading issues may have been fixed in Clojure 1.7.
15:28	puredanger	is Bronsa here?
15:43	jcromartie	stuartsierra: got it...
15:43	jcromartie	we had an app that depended on a lib
15:43	jcromartie	the lib called protocol functions at load time
15:43	jcromartie	as part of a (def ...)
15:44	jcromartie	the app that required the lib had :profiles {:uberjar {:main whatever :aot :all}}
15:44	jcromartie	and the main namespace had (:gen-class)
15:45	jcromartie	moving to {:main ^:skip-aot whatever :profiles {:uberjar {:aot :all}} fixed it
15:46	stuartsierra	wow
15:48	amalloy	clojurebot: :gen-class is likely to be the issue
15:48	clojurebot	'Sea, mhuise.
15:48	justin_smith	~aot
15:48	clojurebot	aot was so ahead of its time
15:49	justin_smith	well, he's not wrong
15:58	cfleming	the_danko: Not in Clojure code, unfortunately - lots of people have requested that though, there's an issue in the tracker
16:10	the_danko	cfleming thanks
16:15	ToxicFrog	Argh
16:15	lvh	How do I do lookahead assertions in regexes? I was hoping (re-matcher #"[a-z]+(?=[A-Z]\|$)\|[A-Z][a-z]*" "anABCMethod") might work, but, no luck.
16:16	ToxicFrog	Just wasted an hour debugging an issue caused by the fact that map always returns a list, rather than returning the same type it was passed
16:16	amalloy	lvh: (?=) works in clojure. if it doesn't do what you want, your regex is broken
16:16	ToxicFrog	So (map foo [x y z]) is a list rather than a vector and the two behave very differently in maros
16:16	ARM9	isn't it technically a sequence
16:16	ARM9	a lazy one at that
16:16	SagiCZ	it is a sequence
16:16	SagiCZ	,(type (map inc (range 5)))
16:17	clojurebot	clojure.lang.LazySeq
16:17	amalloy	it looks like you don't want lookahead at all though, and you're just grouping things wrong
16:17	lvh	amalloy: Hm. Okay. So maybe my regex is broken. I was expecting that regex to match at the very least "abc", since the first part is 1-or-more lowercase chars, and the second part is zero-or-more Capitalized groups
16:17	SagiCZ	you can get a vector this way
16:17	SagiCZ	,(mapv inc (range 5))
16:17	clojurebot	[1 2 3 4 5]
16:17	lvh	amalloy: Instead, I'm getting no matches at all.
16:17	amalloy	#"[a-z]+(?:[A-Z][A-Za-z]*)" looks like more what you meant
16:17	amalloy	er, #"[a-z]+(?:[A-Z][A-Za-z]*)?"
16:17	amalloy	forgot the ?
16:18	lvh	I think that would parse someABCMethod differently
16:19	lvh	("some" "ABC" "Method") vs ("some" "A" "B" "C" "Method"); if that makes any sense
16:19	amalloy	sure, but so what? you don't have any capturing groups
16:19	amalloy	i can't tell from your malformed regex what you want to capture in some future version of the regex
16:20	amalloy	anyway, mine "parses it like", if such a thing can really be usefully said, ("some" "A" "BCMethod")
16:21	Frozenlock	Any library suggestion to work with SQL? (sqlingvo, korma?)
16:22	amalloy	clojure.java.jdbc
16:23	Frozenlock	amalloy: I'll immediately look at it, thanks!
16:24	lvh	amalloy: Sorry, yes; I am trying to capture them. I'm trying to turn a bunch of Java variable names into Clojure-looking keywords.
16:25	amalloy	then i would say the most obvious thing wrong with your original regex is that you seem to believe [A-Z][a-z]* is the same as [A-Za-z]*
16:26	lvh	That's why I care how it would match; I'm going to (join "-" (map lower-case bits)) afterwards.
16:37	SagiCZ	lvh: have you heard of regexpal.com ? its really easy, like zero learning curve and helps me with my pathetic regex atempts
16:42	Frozenlock	There's also re-builder in emacs http://www.masteringemacs.org/article/re-builder-interactive-regexp-builder
16:58	AeroNotix	Does :java-source-paths affect how lein finds clojure classes with :gen-class?
16:58	AeroNotix	I seem to not be able to properly compile things when I have a repo with java
16:58	creese	How do you tell clj-http not to throw exceptions for 40x, 50x, errors?
16:59	AeroNotix	creese: use http-kit :L)
16:59	creese	is that project more current?
16:59	AeroNotix	probably
16:59	hiredman	read the readme and do what it says?
17:00	creese	it says to use :throw-exceptions false, but that has no effect
17:01	creese	I'm inside a go block, I wonder if that's breaks certain assumptions
17:01	pipi	k
17:01	hiredman	well 1. do do io in a go block 2. why do you think it has no effect?
17:01	hiredman	don't do
17:01	clojurebot	Pardon?
17:02	creese	the io happens in a callback
17:02	creese	it has no effect because I always get a traceback even if I try to catch
17:03	lurkOnTheWall	I'm trying to get fireplace working, and I have the leiningen plugin, but I can't seem to connect to the nREPL server.
17:03	lurkOnTheWall	I'm getting errno 111 connection refused.
17:03	AeroNotix	when I add :java-source-paths and then use the java package in a :gen-class then try to compile+import the gen-class'd joint, it complains about some classes missed.
17:04	AeroNotix	missing*
17:04	AeroNotix	any ideas?
17:04	hiredman	creese: so the clj-http option definitely works, if you think you are setting the option and it is not working, that is because you are failing to set it for some reason
17:05	hiredman	either you are doing io in a go block or you are not, you say "I am inside a go block"
17:05	creese	definately in a go block
17:05	creese	the exception comes from the callback
17:05	hiredman	creese: and how are you passing the option to clj-http?
17:06	lurkOnTheWall	hmmm... I may have installed cider-nrepl, but not cider
17:06	hiredman	what callback?
17:06	hiredman	clj-http is synchronous, no callbacks
17:06	creese	I know
17:06	creese	clj-http is called from a go block
17:07	AeroNotix	I am inside a cupboard
17:07	AeroNotix	am I doing io?
17:07	hiredman	then you are doing io in a go block
17:07	creese	what's wrong with that?
17:08	hiredman	blocking io blocks, and go blocks all share a threadpool
17:09	hiredman	(bounded)
17:10	creese	the exception is coming from thread "async-dispatch-2", can I assume that means it's within a go block?
17:10	hiredman	how are you trying to catch the exception?
17:11	creese	I want clj-http to not throw it at all
17:11	creese	but :throw-exceptions false has no effect
17:11	hiredman	creese: so how are you tell in to not throw?
17:13	hiredman	I know that setting the options works, I don't know how you are trying to set them that it doesn't work, you could be putting the option in the wrong place in the map
17:13	creese	(client/post url {:body (json/write-str data) :content-type :json :accept :json} {:as :json :throw-exceptions false})
17:14	creese	ok
17:14	hiredman	or since core.async is at play, you could have spun off code running in a go loop or something, that is printing errors, fixed it in in your code, and never stopped the go-loop so you still see errors from the old code running
17:15	joegallo	pretty sure that's supposed to just be one map...
17:15	hiredman	yeah
17:16	creese	ok, that did it
17:16	creese	I read the docs wrong
17:16	creese	cool
17:16	joegallo	no worries, it happens
17:17	hiredman	(and stop doing io in a go block)
17:20	lurkOnTheWall	I'm not sure that lein's target/repl-port is being set correctly. How could I check that?
17:23	ToxicFrog	I think this may be a new, horrible record, at least for me: https://gist.github.com/ToxicFrog/2a24438134717968158d
17:23	ToxicFrog	117 lines of compiler crash vomit to scroll through to get to the error message.
17:24	lurkOnTheWall	idk what happened, but it's working now.
17:24	AeroNotix	when I add :java-source-paths and then use the java package in a :gen-class then try to compile+import the gen-class'd joint, it complains about some classes missing.
17:30	puredanger	ToxicFrog: the first line of the message tells you the problem and location doesn't it? there is no reason the tool (lein) has to show you the stack trace here.
17:30	ToxicFrog	puredanger: no reason at all! And yet it does.
17:42	iamjarvo	is there a recommended way to use jars with clojure?
17:42	iamjarvo	articles im finding are older
17:42	puredanger	just put them on the classpath :)
17:43	iamjarvo	hrm i read that gets difficult. any experience with this? https://github.com/kumarshantanu/lein-localrepo
17:43	iamjarvo	im also new to java so im exploring
17:44	puredanger	the easiest way to deal with jars etc is to use Leiningen and let it manage them for you in your local Maven cache
17:44	puredanger	if you are experimenting, "lein try" is pretty handy https://github.com/rkneufeld/lein-try
17:45	iamjarvo	thanks
17:57	iamjarvo	turns out this was already available with lein deps org.apache.poi/poi
18:25	timothyw	Hey all, quick q.
18:25	timothyw	For emacs cider (https://github.com/clojure-emacs/cider)
18:25	timothyw	How can I get ac-cider working ? (https://github.com/clojure-emacs/ac-cider)
18:25	timothyw	The given instructions don't work (not showing completions on my system)
18:42	paxan	clojure.core.match question. Is it possible to specify a clause with pattern dynamically? Two examples coming…
18:42	paxan	(match [{:yo 123}] [{}] :yes :else :no) ; => :yes
18:42	paxan	(let [p {}] (match [{:yo 123}] [p] :yes :else :no)) ;=> :no
18:43	amalloy	no
18:43	timothyw	… Nevermind. I just had to reboot my VM for some reason :)
18:43	timothyw	probably just a zombie process or something
18:57	paxan	I've grokked how to use core.match with dynamic clauses…
18:57	paxan	(eval (let [v {:yo 123} p (read-string "{:yo _}")] `(match [~v] [~p] :yes :else :no))) ;=> :yes
18:57	paxan	(eval (let [v {:abc 123} p (read-string "{:yo _}")] `(match [~v] [~p] :yes :else :no))) ; => :no
18:58	paxan	the above demonstrates a pattern, p, obtained, say, from a command line arg.
18:58	martinklepsch	,(let [a #{:a :b} b #{:c :a}] (clojure.set/difference (clojure.set/union a b) (clojure.set/intersection #{:a :b} #{:c :a})))
18:58	clojurebot	#<CompilerException java.lang.ClassNotFoundException: clojure.set, compiling:(NO_SOURCE_PATH:0:0)>
18:59	martinklepsch	is there a more elegant way of doing that?
19:00	amalloy	martinklepsch: this is computing the symmetric difference, right?
19:01	amalloy	i'd say it's easier to understand when written as (union (difference a b) (difference b a)), but of course that's the same number of operations
19:06	martinklepsch	amalloy: ah neat, didn't know how do describe it.
19:07	martinklepsch	amalloy: thanks
19:24	lvh	Hm.
19:25	lvh	I have a nested enum inside some other class. Is Outer$Inner/CONST_NAME not how I access those?
19:25	lvh	I figured it's a static field, and Outer$Inner is how you do nested classes, right?
19:25	amalloy	it is
19:25	amalloy	did you forget to import Outer$Inner?
19:26	lvh	Ah; I didn't import it separately :)
19:26	lvh	Thanks!
19:27	amalloy	remember, inner classes are a fiction of javac. it's really just an ordinary class with a funny name, and if you want to use it you have to import it (or refer to it fully-qualified), just like any class
19:28	lvh	Right, makes sense. I guess I was hoping for those imports to be automatically resolved, or something.
19:29	lvh	But given how it's all lies anyway, it makes sense :)
19:39	vas	How do you switch a handler from "dev" to "production" (so that stack traces just return a 404 instead)?
20:54	jcromartie	what does "lein clean" do if it doesn't clean out target/
20:56	TEttinger	jcromartie: maybe the output dir isn't target?
20:56	jcromartie	maybe
20:57	jcromartie	this is a brand-new "lein new app"
21:02	TEttinger	so what's in target ?
21:04	jcromartie	target/uberjar/classes etc.
21:05	jcromartie	seems like target/uberjar is preserved during "lein clean"
21:11	TEttinger	jcromartie, is the uberjar running? it might be locked
21:13	jcromartie	the effect is that "lein uberjar" doesn't actually compile the code again
21:14	jcromartie	"rm -r target && lein uberjar" will compile the namespaces again
21:14	TEttinger	that's odd
21:14	jcromartie	yah
21:14	jcromartie	Leiningen 2.5.0 on Java 1.7.0_75 Java HotSpot(TM) 64-Bit Server VM
21:15	TEttinger	lein uberjar won't recompile if the sources haven't changed
21:15	TEttinger	so there's that
21:18	jcromartie	well anyway, this is tangential to what I'm trying to do
21:18	jcromartie	I'm trying to narrow down this issue with AOT and defrecord
21:26	creese	What's the best way to debug a macro?
21:27	jcromartie	(macroexpand-1
21:27	jcromartie	,(macroexpand-1 '(when true :foo))
21:27	clojurebot	(if true (do :foo))
21:36	amalloy	creese: also, strive to write macros simple enough that you don't have to debug them
21:54	TimMc	amalloy: Arbitrarily small pieces of code can require debugging. :-)
21:55	amalloy	TimMc: did i say small?
21:57	TimMc	heh
21:57	TimMc	I think my point still stands.
21:59	amalloy	of course, "don't write bugs" is not trivially-followable advice, but it's still useful advice. a lot of people who need help writing macros are building this giant thing, most (or all) of which shouldn't be a macro at all
22:01	TEttinger	this piece of code could be entertaining to debug http://www.ioccc.org/1984/mullender.c
22:01	TEttinger	valid C code, for a certain kind of machine
22:02	justin_smith	what a silly way to write machine code
22:02	TimMc	Oh, yes -- I think you have to pass a compiler flag to avoid a warning, though?
22:02	amalloy	and run a machine older than the stones
22:03	amalloy	is that the right idiom? it doesn't feel right. older than the ____
22:04	amalloy	the hills
22:05	TEttinger	TimMc, it was an entry in 1984, I doubt compilers cared much
22:05	justin_smith	I think "older than amalloy" is the accepted hyperbole
22:15	justin_smith	actually, "old as dirt" is the version I always heard in rural Vermont at least
22:15	justin_smith	or "old as the hills"
22:16	amalloy	you're probably right, old as the hills sounds best to me
22:17	justin_smith	there's also "older than the stars", which is a book, and has a nice ring to it
22:19	TEttinger	old as time, old as memory, old as AOL CDs in the mail...
22:20	justin_smith	older than the cue cat™
22:21	xemdetia	is there a better tarball out there right now that has a file index
22:21	justin_smith	?
22:22	xemdetia	When you do tar -tf on a 14 GB file it takes a while :)
22:22	justin_smith	oh, so a replacement for tar with faster file index?
22:22	xemdetia	well, with a file index. The reason why it is so slow is that tar does not have a file index since it is designed for tape
22:22	justin_smith	right
22:23	xemdetia	I was writing one for fun a while ago
22:23	xemdetia	I forget what happened to that
22:23	justin_smith	tar = TApe ARchive
22:23	TEttinger	taar
22:23	justin_smith	TEttinger: for some reason everyon started spelling it wrong
22:23	TEttinger	heh
22:35	andyf	xemdetia: Zip ?
22:36	xemdetia	andyf, maybe I will have to check if it does perms like tar
22:36	xemdetia	I don't know I am just waiting for like 300 GB to process from a silly command and I dream of something else
22:36	andyf	Compression only occurs independently between files, I believe, not across files like tar.gz or whatever compression you use
22:38	xemdetia	yeah it's not the compression as much as just getting a good ol' manifest quick
22:38	andyf	I 'm surprised wikipedia's comparison of archive formats page doesn't mention that property, nor whether they maintain unix file permissions
22:44	TimMc	gfredericks: We still haven't figured out a name for the kid! So far I'm leaning towards mysql_escape_baby
22:45	justin_smith	TimMc: for bonus points, name the next kid mysql_real_escape_baby
22:45	justin_smith	to encourage healthy sibling rivalry
22:46	TimMc	Oh, that is a much better name, yes!
22:46	nuwanda_	robert');drop table students :)
22:46	gfredericks	,(format "baby-%04d" (rand-int 10000))
22:46	clojurebot	"baby-2226"
22:46	TimMc	:-D
22:46	justin_smith	gfredericks: well, you could just make their social security number part of their name
22:46	xemdetia	andyf, I agree. I believe rar has an index but that's patent-hard
22:46	TimMc	justin_smith: They don't have one ye. Deadlock.
22:47	andyf	Looks like info-zip should maintain unix permissions, from what I have read, not personal testing
22:47	justin_smith	TimMc: well, you could get around that with a delay
22:47	justin_smith	or a promise
22:47	gfredericks	TimMc: you could also consider some contrived manner of having the baby determine its own name
22:48	gfredericks	or also you could use "Gary Fredericks"
22:48	TimMc	I think the state needs a string, not a reference.
22:49	TimMc	gfredericks: Gurgle Psffwtt McCormack
22:49	TimMc	the Hic'th
22:49	justin_smith	TimMc: I think the future is in ungoogleable names
22:50	justin_smith	things like "boobs" or "free ipad" that are totally impossible to google search for
22:50	justin_smith	thus guaranteeing privacy
22:50	TimMc	I've thought of that.
22:50	justin_smith	"mail order viagra, esquire"
22:51	TimMc	I did some NLP work so I know how to fool some of the algorithms.
22:51	gfredericks	also "Barack Obama"
22:51	TimMc	Fnu The
22:52	TimMc	A name-placeholder + a stopword.
22:52	justin_smith	foo
22:53	justin_smith	that one has a built in scheme for naming all the kids
22:53	justin_smith	foo, bar, baz, quux
23:00	TEttinger	could just name him Lil' Satan
23:00	gfredericks	or node.js
23:01	TEttinger	oh!
23:01	TEttinger	unicode snowman
23:01	gfredericks	not even the unicode character just the two words "Unicode Snowman"
23:01	TEttinger	"please sign your name in cursive." "...uh... ☃"
23:02	TimMc	U+2028 LINE SEPARATOR
23:02	TEttinger	hahaha
23:02	TEttinger	U+FEFF BOM
23:05	gfredericks	U+20FG
23:05	justin_smith	"unbreakable space" would be a pretty kickass name
23:06	TEttinger	,\u20fg
23:06	clojurebot	#<IllegalArgumentException java.lang.IllegalArgumentException: Invalid digit: g>
23:06	TEttinger	agh
23:06	TEttinger	,\u20ff
23:06	clojurebot	\⃿
23:06	TEttinger	heh
23:06	andyf	Base 17 is hard
23:07	gfredericks	security by obscurity
23:07	TEttinger	,17r20fg
23:07	clojurebot	10097
23:07	TEttinger	,(Integer/toString 10097 16)
23:07	clojurebot	"2771"
23:07	TEttinger	alternatively
23:07	TEttinger	,(char 10097)
23:07	clojurebot	\❱
23:07	TEttinger	huh
23:07	TEttinger	that's nice
23:08	gfredericks	how on earth do they track unnamed kids at the hospital
23:08	TEttinger	then again, you don't know if it's base 17 or up to base 36, or even base64
23:08	TEttinger	"wiggly one"
23:08	gfredericks	I guess they can't rely on just names in general anyhow
23:10	TEttinger	"one of the 15 with the parents who say no vaccines, it doesn't matter, they'll be headed to the morgue in a few years anyway"
23:10	justin_smith	speaking of babies and systems, the craziest thing was that idea in the US of making one number that is simultaneously a unique identifier and also an authentication secret
23:10	TEttinger	heh
23:10	justin_smith	like, did they spend more than an hour or two thinking about the consequences of that?
23:12	gfredericks	was it designed to be an auth secret?
23:12	justin_smith	gfredericks: yeah, that may have just been a thing that ended up happening
23:12	TEttinger	kinda like Sony's authentication scheme for PS3 releases. scheme singular, they used the same phrase to authenticate any software for PS3, so the moment it was cracked anyone could bypass the hardware hypervisor
23:12	justin_smith	haha
23:12	justin_smith	TEttinger: you'd think with security practices like that they'd get hacked eventually or something
23:13	TEttinger	lol
23:13	TEttinger	this was long before the sony pictures hack, but it seems like security was not exactly on the mind of anyone at sony
23:13	clojurebot	Gabh mo leithscéal?
23:27	TimMc	gfredericks: Well, she's currently registered at the pediatrician's office as "Baby Girl Thorn" :-/
23:28	TimMc	gfredericks: http://www.kalzumeus.com/2010/06/17/falsehoods-programmers-believe-about-names/ #40
23:29	justin_smith	oh, there's a unicode character for "thorn" Þ
23:29	TimMc	yup
23:29	justin_smith	People’s names fit within a certain defined amount of space.
23:29	justin_smith	haha
23:30	amalloy	my name is infinite, because it includes by reference all experiences i have had up to the current instant in my life, including a recitation of my name
23:31	metellus	good thing you thought up that handy nickname
23:33	justin_smith	http://i.imgur.com/lJrFq.jpg
23:59	vas	justin_smith: what if i require a floating point quantity of ladies?