#clojure – 2014-12-29

2014-12-29

00:55	dweave	how does one listen for when a promise is fulfilled
00:55	dweave	is that just not a thing
00:55	justin_smith	dweave (future @promise (do-something))
00:55	dweave	@ is the same as dereference right?
00:55	justin_smith	(do-something) won't be called until the promise is fulfilled (and this will all be done in a thread from the future thread pool)
00:55	justin_smith	it's the same as deref, yeah
00:56	justin_smith	if you want to block the current thread, just do @promise ... without the future part
00:56	justin_smith	(doc realized?)
00:56	clojurebot	"([x]); Returns true if a value has been produced for a promise, delay, future or lazy sequence."
00:56	justin_smith	realized can also be handy
00:56	justin_smith	*realized? of course
00:58	dweave	won’t the promise be dereferenced before do-something
00:59	dweave	has completed
00:59	justin_smith	it will block until the promise is fulfilled
00:59	justin_smith	so do-something can't happen until something delivers to the promise
00:59	dweave	oh i see
00:59	dweave	and do something will deliver to the promise
00:59	justin_smith	no
00:59	justin_smith	something else would have to
01:00	justin_smith	in another thread, since that one is blocked
01:00	dweave	ha oops
01:00	dweave	right i see
01:00	justin_smith	because do-something would never be called if the promise is not delivered to
01:01	dweave	so deref is always blocking?
01:01	justin_smith	yes, that's where realized? comes in
01:01	dweave	or only in this context for some reason
01:01	justin_smith	if you just want to check
01:01	dweave	ok i see
01:01	justin_smith	for delays and promises, it doesn't return until there is a value to deliver
01:01	justin_smith	though for atoms / refs / agents it won't block
01:01	justin_smith	it just gives you the value as of the moment you deref
01:02	justin_smith	it also blocks for the completion of futures
01:02	dweave	i’m more familiar with promises in various JS libs. and promises in clojure really seem more like “defereds”
01:02	justin_smith	it's a promise because any part of your code can deliver the value
01:03	dweave	right
01:03	justin_smith	and the value can only be delivered once (unlike an atom, agent, or ref that can be updated as often as you like)
01:03	justin_smith	how are promises typically used in js that is different?
01:05	dweave	promises in most implementations in JS really only exist for supplying a callback
01:05	dweave	they have a “then” method which takes a callback which accepts the future value and then returns a promise
01:05	justin_smith	yeah, the (future @promise (do-something)) followed by passing the promise to something else that delivers to it could work that way
01:05	dweave	and as such are composable
01:06	justin_smith	or better yet (future (do-something @promise)) followed by (go-realize promise)
01:06	justin_smith	where go-realize decides what value to put in that promise of course
01:06	dweave	nice
01:07	justin_smith	dweave: but core.async allows similar logic, in much more powerful combinations
01:07	dweave	yeah just exploring
01:07	dweave	thanks again
01:07	justin_smith	including situations where you have multiple elements of your logic that need to coordinate between one another at multiple steps
01:08	justin_smith	promises in clojure are much more flexible / general
01:55	alexbara`	for some reason CLJS that works fine use Chestnut, fails to compile into working JS when compiled using lein cljsbuild once Any suggestions on thing to look at?
01:56	dnolen_	alexbara`: I'm assuming you're using :advanced?
01:57	alexbara`	dnolen_: yes. I will try using :none too
01:57	alexbara`	(:optimizations :none) I mean
01:58	dnolen_	alexbara`: with :advanced you generally need to supply externs if you're calling into non-Closure or non-ClojureScript libraries
01:58	dnolen_	alexbara`: generally :none is for dev, :advanced is only for production builds
01:59	alexbara`	dnolen_: I don't think we are calling into non-cljs libraries but let me investigate that idea
02:00	dnolen_	alexbara`: that's usually the reason :advanced builds do not work - there have been some more extreme edge case but I doubt you're encountering them
02:01	dnolen_	alexbara`: even accessing properties on JS objects requires externs under :advanced if they aren't standard browser features
02:04	alexbara`	dnolen_: aha, I bet it is the property access that might be doing it
02:12	dagda1_	I can't find much documentation or examples of the core.async sequence functions. Can anyone point me to some concrete examples for e.g. map or take or where is the transformer function mentioned in the docs
02:14	dagda1_	ok, transformer is now transducer but I'm struggling to find any examples of this
02:14	kenrestivo	there's not a lot out there
02:14	kenrestivo	it's very new
02:15	kenrestivo	in fact, the only use i can find in any indexed open source projects is... in transducers itself :-/ http://crossclj.info/fun/clojure.core/transduce.html
02:18	kenrestivo	the name "eduction" always makes me laugh. in 1980 when "the wall" first came out, i saw grafitti that said "we don't need no eduction". i scratched underneath it "yes, you do".
02:19	luxbock	there's some informaton here: http://gigasquidsoftware.com/blog/2014/09/06/green-eggs-and-transducers/
02:21	luxbock	dagda1_: http://go.cognitect.com/core_async_webinar_recording
02:21	luxbock	this might be of help as well
02:23	dagda1_	luxbock: thanks, I'm going to blog about this when I understand it. There is very little out there
02:24	luxbock	dagda1_: yeah, transducers are a 1.7 feature, which is still in alpha
02:30	zom_	attempting to solve this
02:30	zom_	https://www.4clojure.com/problem/26#prob-title
02:30	zom_	i've seen a solution that uses a lazy-seq
02:30	zom_	(fn [x] (take x ((fn fib [a b] (cons a (lazy-seq (fib b (+ a b))))) 1 1)))
02:30	zom_	can someone with more experience walk me through it
02:31	zom_	I get the rough idea
02:31	zom_	we specify the number of fib numbers to generate (X)
02:31	zom_	we then take that many from an infinite list
02:32	zom_	but I dont'get the lazy-seq
02:33	dnolen_	dagda1_: in core.async channels take the transducer
02:33	zom_	does the lazy-seq target the take???
02:33	lazybot	zom_: Yes, 100% for sure.
02:35	zom_	so to build the list, are we just consing the a param every time?
02:36	zom_	and only calling the recursion the number of times x is specified
02:36	zom_	?
02:37	nuwanda_	the sequence is lazy, which means it's only called when the value is needed, in this case it's "needed" by calling take X
02:37	nuwanda_	not sure if that's very clear
02:38	luxbock	zom_: does this help: https://gist.github.com/luxbock/c8ab4eaf7aabf3440cb1 ?
02:44	zom_	luxbock: I got it, thanks
03:28	namra	hm can someone enlighten me in case of clj-tools-logging? i didn't what to throw a logger configuration in every namespace, so i thought i can split logging fns into a separate namespace and configure the logger there and when other fns in other namespaces need to log something the call log-fns from the logger-ns and provide their namespace with the call.
03:28	namra	but that doesnt seem to work
03:29	namra	nothing gets logged in this case, and no errors whatsover
03:36	dagda1_	does anyone have an example of alt! as opposed to alts!
06:27	Empperi	oh ffs, lein uberjar seems to do implicit rm -r ./target
06:27	Empperi	meaning one cannot generate resources to target directory and then package them into uberjar
06:29	Empperi	seems to be the latest change to uberjar task...
06:29	Empperi	https://github.com/technomancy/leiningen/commit/d053f3add4ef80c572d0ed3f1a1493a8758d6cdd
06:35	Empperi	now I need to add a separate "target-resources" directory, add it into .gitignore and whatnot to make this work
06:37	Empperi	and lein clean will not be going to clean that directory now
06:37	Empperi	geesh
06:37	Empperi	makes me really want to change into boot from leiningen
06:40	Empperi	cursive doesn't support it though
06:41	devll	Is there a blog or book on "Algorithms in Clojure"?
06:41	SagiCZ1	there is clojure cookbook...
06:41	cfleming	Empperi: I'm hoping to add boot support very soon, since I'd like to use it myself
06:41	devll	Yes. I've read the Cookbook. It's more of a API usage guide styled book.
06:42	Empperi	cfleming: you are the cursive developer?
06:42	SagiCZ1	is boot not based on maven?
06:42	devll	I mean algorithms.
06:42	Empperi	and that is really good news!
06:42	cfleming	Empperi: I am
06:42	Empperi	great work with cursive btw
06:42	Empperi	love it
06:42	cfleming	Empperi: Thanks, I'm glad you're enjoying it!
06:42	Empperi	can I make an additional feature request in addition to boot support?
06:42	cfleming	Empperi: Of course, shoot
06:43	Empperi	currently cursive doesn't understand evaluated requires in autocompletes, eg. when you dynamically load libraries via (require 'whatnot)
06:43	Empperi	one could implement that by checking if the currently active repl connection knows those vars
06:44	cfleming	Empperi: It should understand those
06:44	Empperi	hmmh, it doesn't in our project at least :(
06:44	SagiCZ1	Empperi: it usually works for me
06:44	SagiCZ1	sometimes it doesnt load the documentation though
06:44	Empperi	we are lazy loading some libraries in order to do stuff before this java library manages to stuff at class load time
06:44	Empperi	do stuff
06:45	Empperi	and this works fine but cursive's autocomplete breaks
06:45	cfleming	Empperi: Can you give me an example of a require that isn't working for you? Are you doing something like using require with a variable rather than a constant?
06:45	Empperi	oh and we are doing it via doseq
06:45	cfleming	Ah
06:45	cfleming	In that case all bets are off :-)
06:45	Empperi	https://www.refheap.com/1c87512d6f57fea1b077c3ffc
06:45	Empperi	like that
06:46	Empperi	to make it nicer to add new dependencies
06:47	cfleming	I see - that won't work unfortunately. If you break it out into explicit requires, it will work. In fact, in your case you can just use a single require.
06:47	Empperi	true
06:47	cfleming	Which should be just as easy to add new deps to - the doseq there isn't really gaining you anything that I can see.
06:49	Empperi	need to quote each required dependency separately with plain require :)
06:49	cfleming	Empperi: https://www.refheap.com/95513
06:49	Empperi	but I can live with that
06:49	cfleming	Yeah, that's a small price to pay for resolve support IMO
06:49	Empperi	indeed
06:49	Empperi	didn't know cursive can parse require form that way
06:49	Empperi	but makes sense
06:50	Empperi	not too hard to implement when you've already implemented the ns macro require support
06:50	cfleming	Yeah, anything where the require is explicit should work fine
06:50	cfleming	Right - in fact the ns support is implemented in terms of the require support, which is how ns works behind the scenes.
06:51	cfleming	So all the other forms like refer, import and so on work too.
06:51	Empperi	nice
06:51	Empperi	do you have some kind of guess when the boot support would be released?
06:52	cfleming	Empperi: Umm... not really, I'm sorry. It's probably a month or two away.
06:52	cfleming	Empperi: But it's definitely on the short-term roadmap.
06:53	Empperi	no problem man, just anxious little kid here who wants a new toy :)
06:54	Empperi	on a more serious note, I'd like to evaluate boot more throughly if we could move to it from leiningen in our project
06:54	Empperi	currently our developers use idea+cursive though so not really worth it until cursive supports boot
06:55	Empperi	since it is kinda pain when cursive doesn't understand dependencies etc even though one can connect to boot repl
06:56	cfleming	Empperi: Some Cursive users are already using boot, it actually doesn't need too much support. You can use the External Tools support to run boot tasks, and I think you could use a remote config to connect to the boot REPL
06:56	Empperi	cfleming: how about the dependencies?
06:56	Empperi	add manually each to your project?
06:57	cfleming	Empperi: https://gist.github.com/bsima/88969126962803a6500f
06:57	cfleming	Empperi: So you maintain a project.clj for the dependencies, and then read them in from boot
06:57	Empperi	hmm, interesting idea
06:57	Empperi	hack but not too horrible one
06:58	cfleming	Not pretty, but it's doable if you're really keen to use boot right away
06:58	Empperi	might give that one a try
06:58	Empperi	have this hobby project where I'm using boot
06:59	cfleming	Empperi: See also https://github.com/cursiveclojure/cursive/issues/665 for a way to fake the source folder support using a similar idea
07:01	Empperi	nice
07:01	Empperi	gonna definetly try these out when I get home and have some time for my hobby project
07:01	Empperi	...which might take some time since kids and everything
07:01	cfleming	Ok, if you get it working let us know on the mailing list, a few people have been asking about it
07:02	cfleming	Yeah, kids make hobby projects tough.
07:02	cfleming	Not to mention work :)
07:02	Empperi	indeed :/
07:02	Empperi	it would be so much more fun if one could just do the happy things!
07:02	Empperi	(not that kids aren't a 'happy thing')
07:03	Empperi	but I'll try to find some time this evening
07:03	cfleming	Empperi: Ok, no rush - like I say, it'll be a while before I get to it
07:04	Empperi	yeah, but really happy to hear you are working on it :)
07:04	Empperi	leiningen is great but it suffers from same problems as maven in many ways
07:04	cfleming	I'm planning to migrate the Cursive build to boot at some point, or at least try to, so support will definitely get much better at that point
07:24	luxbock	would you use (partial apply =) to check if every item in a collection is the same, or something else?
07:26	hellofunk	,(doc every?)
07:26	clojurebot	"([pred coll]); Returns true if (pred x) is logical true for every x in coll, else false."
07:27	hellofunk	luxbock: ^
07:28	luxbock	hellofunk: so you'd do (every? (partial = (first coll)) coll) ?
07:29	hellofunk	luxbock: that could work
07:30	hellofunk	luxbock: you could also reduce, though in this case every? is more focused on the problem
07:30	luxbock	my original way is less keystrokes at least, but I'm not sure which is clearer in its intention
07:32	hellofunk	luxbock: the most specialized case is the most clear, thus every? wins out over a reduce in your particular example. just like all whens can be ifs, but whens are clearer for single conds. same idea.
07:33	hellofunk	luxbock: but ultimately it is a matter of taste and style. the core clojure functions exist for a reason, so if they do the job, consider them over a more generalized approach (like reduce in this case)
07:33	luxbock	##(let [[x & xs] [1 1 1]] (every? #{x} xs))
07:33	lazybot	⇒ true
07:37	hellofunk	luxbock, just be careful about values that are legitemately nil or false:
07:37	hellofunk	,(let [[x & xs] [nil nil nil nil]] (every? #{x} xs))
07:37	clojurebot	false
07:38	hellofunk	vs, ,(let [[x & xs] [nil nil nil nil]] (every? #(= x %) xs))
07:38	hellofunk	(let [[x & xs] [nil nil nil nil]] (every? #(= x %) xs))
07:38	hellofunk	,(let [[x & xs] [nil nil nil nil]] (every? #(= x %) xs))
07:38	clojurebot	true
07:39	luxbock	yeah good point
07:50	krat0sprakhar	hi all... quick question
07:50	krat0sprakhar	how can I apply and to a list
07:50	krat0sprakhar	(apply and '(true false true false))
07:50	krat0sprakhar	gives me an exception
07:50	krat0sprakhar	any idea?
07:51	Bronsa	krat0sprakhar: and is a macro, you can't use it as a value
07:51	krat0sprakhar	oh!
07:51	krat0sprakhar	so its not a function like str?
07:51	Bronsa	krat0sprakhar: right
07:51	Bronsa	krat0sprakhar: to do what you want, look at `every?`
07:52	krat0sprakhar	thanks!
07:52	krat0sprakhar	thats very helpful :)
07:53	luxbock	,(clojure.walk/macroexpand-all '(and true false true false))
07:53	clojurebot	#<ClassNotFoundException java.lang.ClassNotFoundException: clojure.walk>
07:54	krat0sprakhar	(and true true true)
07:54	krat0sprakhar	,(and true true true)
07:54	clojurebot	true
07:54	krat0sprakhar	oh nice! clojurebot :D
07:54	luxbock	,(macroexpand '(and true false true false)
07:54	clojurebot	#<RuntimeException java.lang.RuntimeException: EOF while reading>
07:55	krat0sprakhar	4clojure is quite tough ..
07:55	krat0sprakhar	did anyone else also struggle?
07:56	hellofunk	krat0sprakhar: yeah some are tricky. the difficulty rankings (easy, medium, etc) are not very accurate either. some of the "easy" ones are hard, and some of the "hard" ones are easy, IMHO
07:57	krat0sprakhar	haha..yeah.. i've solved around ~60.. and my pace has greatly reduced..
08:06	Integralist	Hi all, I'm new to Clojure and am trying to figure out how to call certain Thread methods available in Java.
08:07	Integralist	I'm able to call (Thread/sleep 1000) but not others like (Thread/isInterrupted)
08:07	Integralist	Does anyone know what that would be? The Java exception suggests the method isn't available, but I'm not doing anything specific for (Thread/sleep 1000) to work
08:07	Bronsa	Integralist: isInterrupted is not a static method
08:08	Integralist	Bronsa: ok, so I'd have to create instance of Thread (or access an instance to utilise that method)
08:08	Bronsa	you have to call it in a Thread instance, like (.isInterrupted some-thread-object)
08:09	Integralist	Bronsa: for a bit of context, I'm messing around with STM/concurrency https://gist.github.com/Integralist/4d7f4a5f62b4b567e419
08:10	Bronsa	Integralist: you probably want (.isInterrupted (Thread/currentThread)) or something like that
08:10	Integralist	Bronsa: aha, gotcha. Cool I'll try that now. Thank you!
08:15	luxbock	why doesn't map-indexed have the transducer arity, or is it not yet implemented?
08:17	luxbock	ah I see: http://dev.clojure.org/jira/browse/CLJ-1601
08:33	Integralist	Hello again, here is some code that tries to peek at the state of different threads: https://gist.github.com/Integralist/741c2577e97fd8e466a4#file-test-clj-L11-L13 but the problem I'm having is that the function suggests the current thread is the main thread, where I would have expected it to refer to the thread created by the (future ...)
08:34	Integralist	i.e. output for (Thread/currentThread) looks like: Thread[clojure-agent-send-off-pool-15,5,main]
08:48	luxbock	in a lot of the microbenchmarks I've seen that compare the core functions against their transducer versions, there are improvements from 2-3x for the transducer version
08:49	luxbock	is this because the compiler has an easier time optimizing the generated bytecode when the calls happen inside the transduce-operation?
08:49	luxbock	just wondering how come the improvements are so consistent accross the board
09:36	luxbock	heh: http://imgur.com/MleZdbO
10:31	bacon1989	Could someone tell me what's wrong with this macro? https://www.refheap.com/aca0636be093f888e74e0beab
10:31	bacon1989	it's complaining about keywords
10:32	bacon1989	I suspect the (run ...) function, but i'm pretty new to macros, so i'm not too sure
10:33	Bronsa	bacon1989: how are you using it?
10:34	bacon1989	(new-system-with-name :fixed-width-map (generate-fixed-width-map))
10:36	bacon1989	it fails when it tries to compile the macro, or something
10:36	bacon1989	i'm using clojurescript, I don't know if that makes a difference
10:36	bacon1989	it's basically complaining before I even use itj
10:37	bacon1989	the error i'm getting is "nth not supported on this type: keyword"
10:38	bacon1989	everything compiles fine if I don't use :require-macro
10:45	dnolen_	if you have a ClojureScript library not listed here feel free to add it https://github.com/clojure/clojurescript/wiki#useful-libraries
10:46	rboyd	nice list
10:48	rboyd	dnolen_: any talks about om/pedestal-app merge since your joining cognitect?
10:52	dnolen_	rboyd: no, and unlikely - pedestal has a new more focused direction - the front end is left for other tools
10:55	rboyd	dnolen_: right on. I finally had a chance to kick the tires on om a couple weeks ago. really cool stuff. one more question I had for you, what is "mies"?
10:55	rboyd	acronym?
10:55	dnolen_	rboyd: just a minimal CLJS template - like "mies van der rohe"
10:56	dnolen_	"less is more"
10:56	rboyd	aha. =]
10:57	dnolen_	also landed some really big changes to how ClojureScript REPLs work to allow them to start faster
10:59	dnolen_	breakage expected for projects that depend on cljs.repl namespace, planning on writing up notes on the changes - hoping to minimize the effect and also start talking about what assumptions should stabilize
10:59	dnolen_	still, it's pretty sweet to have Browser, Node.js, and Rhino REPL out of the box and they can all start in a reasonable amount of time now
10:59	rboyd	I think I saw something fly across hn frontpage mentioning your speedups
11:00	bacon1989	fixed my problem, I wasn't requiring it correctly
11:00	bacon1989	still have issues with the namespace not being picked up on, but whateves
11:01	dnolen_	the goal is to support just pointing a REPL at an :output-dir and it will load the analysis caches off disk - no actual analysis or compiling
11:05	dysfun	(print-system @systems) # ArityException Wrong number of args (2) passed to: repl/print-system/fn--12388 <-- WTF?
11:06	jonathanj	how do i rename a key in a map?
11:07	jonathanj	i see there's clojure.set/rename-keys but i'm not sure if that's what i should be using
11:07	bacon1989	,(def x {:a 1 :b 2})
11:07	clojurebot	#'sandbox/x
11:10	bacon1989	,(let [old-val (:a x)] (->> x (dissoc :a) (assoc :c old-val)))
11:10	clojurebot	#<ClassCastException java.lang.ClassCastException: clojure.lang.Keyword cannot be cast to clojure.lang.IPersistentMap>
11:10	dysfun	isn't there a shorthand for that in useful already?
11:10	bacon1989	woops, wrong threaeding
11:11	dysfun	seems like the sort of thing it would cover
11:21	hellofunk	,(let [x {:a 1}] (assoc (dissoc x :a) :b (:a x)))
11:21	clojurebot	{:b 1}
11:22	hellofunk	bacon1989: note there is no need to "cache" the old-val since these are immutable data structures
11:54	justin_smith	luxbock: the non-transducer versions do a lot of work that transducers don't need to do
11:55	justin_smith	ie. (map f (filter p? l)) creates two lazy seqs, when you only need 1
11:56	justin_smith	and the more chaining you have, the bigger an improvement you get when you can drop that redundancy
11:59	justin_smith	luxbock: JIT changes bytecode execution, but does not mess with data structures, and data structures make huge performance differences
12:00	luxbock	justin_smith: alright thanks
12:01	justin_smith	that makes me wonder if JIT couldn't do amazing things if it knew our data structures were immutible
12:02	TEttinger	Pixie probably is doing that
12:02	luxbock	maybe some day
12:02	justin_smith	TEttinger: I hope so, it would be interesting to see
12:02	justin_smith	of course the haskell compiler is all over that kind of stuff
12:03	luxbock	does anyone ever directly write in JVM bytecode to tweak some inner loop the same way that people mess with assemply to optimize C code?
12:03	luxbock	assembly*
12:04	justin_smith	luxbock: well, clojure generates bytecode
12:04	justin_smith	but beyond a certain point, JIT is going to do a better job of reorganizing things than you will, since it has actual runtime profiling data on the host machine
12:04	sova	ho man, playing directly with bytecode... not an impossible task but the beauty of abstraction (i.e. programming languages) is that you don't have to
12:05	luxbock	I was just wondering if it would be possible in theory to have a Clojure library where you can create callable functions by writing the bytecode as a DSL, like does that even make sense?
12:06	luxbock	I'm not saying it would be practical or something I'm interested in but I'm just curious
12:06	patrickgombert	luxbock: tail recursion (loop .. recur) is unrolled into a loop IIRC
12:06	tcrayford____	luxbock: I've read a load of jvm bytecode whilst optimizing clojure. Never really wanted to write it directly though
12:06	sova	yes you can definitely do it, if it can be done in java it can be done in clojure, and there is a library for java that plays with bytecode (and kinda lets you reverse-engineer programs)
12:07	tcrayford____	the JIT does so much to bytecode it's not really worth optimizing at the bytecode level IMO
12:07	justin_smith	sova: in fact clojure uses the ASM.java lib to generate its own bytecode when compiling
12:07	dnolen_	if you company is using ClojureScript in production add it here https://github.com/clojure/clojurescript/wiki/Companies-Using-ClojureScript
12:07	dnolen_	s/you/your
12:08	sova	justin_smith: wow i did not know that. although that makes a lot of sense!
12:08	tcrayford____	and the compiler is available at runtime
12:08	tcrayford____	see how datomic, riemann etc compile queries into functions so the JIT can get ahold of them
12:08	justin_smith	sova: yeah, clojure does not generate any java, it compiles directly to byte code for each line of code you send to the repl
12:09	tcrayford____	(both of those just call eval around a (fn expression)
12:11	luxbock	so clojure.asm contains everything one would need to write JVM bytecode by hand?
12:11	justin_smith	luxbock: it's just an embedded copy of the asm lib
12:11	justin_smith	which is well documented
12:11	justin_smith	and yes
12:12	justin_smith	http://asm.ow2.org/
12:12	luxbock	I remember seeing it in use in the clj-native source files
12:12	TimMc	dnolen_: Is this going to lead to more consulting cold-emails? :-P
12:12	luxbock	that looked like some pretty dark magic to me
12:13	luxbock	https://github.com/bagucode/clj-native/blob/master/src/clj_native/structs.clj#L20
12:17	sova	could some kind sir or madam provide a link to understanding macros with examples?
12:19	dnolen_	TimMc: ha, I doubt it - this is not a Cognitect thing - ClojureScript GitHub is sorely lacking information about the maturity of the project
12:21	noonian	sova: maybe http://www.braveclojure.com/writing-macros/
12:21	sova	noonian: gratitude
12:22	TimMc	dnolen_: nod You send code out into the void and it doesn't write home.
12:22	TimMc	Except when it breaks, I guess. :-P
12:22	dnolen_	lol, yep
12:24	m1dnight_	Is there a decent way to get [:key :key2] and [val1 val2] into {:key val1 :key2 val2}? atm I'm planning on mapping vector on the two lists, and then reducing them with a function that assocs them
12:24	hyPiRion	m1dnight_: zipmap?
12:24	noonian	,(zipmap [:key :key2] ['val1 'val2])
12:24	clojurebot	{:key2 val2, :key val1}
12:24	m1dnight_	well i'll be damned
12:25	m1dnight_	thanks, exactly what i was looking for
12:25	m1dnight_	thanks, exactly what i was looking for
12:25	m1dnight_	oops, sorry
12:31	TimMc	$findfn [:key :key2] '[val1 val2] '{:key val1 :key2 val2}
12:31	lazybot	Execution timed out.
12:31	m1dnight_	is that implemented in a brute-force way?
12:31	TimMc	Warm up those caches, buddy.
12:31	m1dnight_	One would guess?
12:32	lazybot	[]
12:32	TimMc	$findfn [:key :key2] '[val1 val2] '{:key val1 :key2 val2}
12:32	TimMc	yeah
12:32	justin_smith	m1dnight_: yeah, totally brute force
12:32	sova	hahah. "lazybot" says it all
12:32	sova	very cool method, gotta say
12:32	TimMc	Wrong kind of lazy. :-P
12:32	lazybot	Execution timed out.
12:32	TimMc	...
12:32	lazybot	[]
12:33	TimMc	lazybot, what was [] the answer to?
12:33	lazybot	It's AWWWW RIGHT!
12:33	TimMc	$findfn 1 2 3
12:33	TimMc	sigh
12:33	hyPiRion	TimMc: (AWWWW RIGHT!) -> []
12:33	sova	Hahahah lazybot wins
12:33	lazybot	Execution timed out.
12:34	TimMc	Raynes: Your bot is on drugs again.
12:34	lazybot	[clojure.core/+' clojure.core/bit-xor clojure.core/unchecked-add-int clojure.core/unchecked-add clojure.core/bit-or clojure.core/+]
12:34	justin_smith	wow, that's a lot of ways to get 3 from 1 and 2
12:35	TimMc	I don't even know if findfn filters based on arities.
13:03	justin_smith	https://github.com/Raynes/findfn/blob/master/src/findfn/core.clj it's a small namespace, looks like no
13:08	TimMc	$findfn [a 1] a 1
13:08	lazybot	java.lang.RuntimeException: Unable to resolve symbol: a in this context, compiling:(NO_SOURCE_PATH:0:0)
13:10	TimMc	$findfn "a" a
13:10	lazybot	java.lang.RuntimeException: Unable to resolve symbol: a in this context, compiling:(NO_SOURCE_PATH:0:0)
13:12	justin_smith	$findfn "a" 'a
13:13	lazybot	Execution timed out.
13:13	justin_smith	man lazybot, that's an easy one
13:13	lazybot	[clojure.core/symbol clojure.core/read-string]
13:13	justin_smith	how weird...
13:13	justin_smith	it's timing out, and then replying....
13:14	TimMc	with a delay
13:16	hyPiRion	dual personality
13:32	m1dnight_	is anyone here who worked on the clojurebot?
13:32	m1dnight_	I'm building one myself for fun but i'm stuck a bit on the irc protocol
13:32	justin_smith	I updated lazybot to use the latest irclj
13:32	justin_smith	but I didn't implement the irc protocol stuff directly
13:34	m1dnight_	hrm, I'm wondering if a direct message can be differentiated by looking at the channel
13:35	m1dnight_	PRIVMSG #channel :hello would be a channel because of the #
13:35	justin_smith	m1dnight_: that's exactly it, the difference between a channel message and a direct one is the channel it is on
13:35	justin_smith	otherwise they are the same thing
13:37	TimMc	because some chat clients correctly treat NOTICE as lower priority than PRIVMSG, but others treat it as a high priority notification.
13:42	m1dnight_	haha, that's kinda cool :D
13:43	m1dnight_	I'm thinking about how to do it architectually atm
13:43	m1dnight_	the main point of practice :p
13:55	dangit	This is where I’m at: http://pastebin.com/BBktFWTP
13:56	dangit	Alternatively, I’m just trying to get the pid so I can kill with something stronger than .destroy, so if anyone has a rec on that…
14:03	TimMc	dangit: You need (.getInt pid p) or something.
14:16	gfredericks	hi
14:16	tcrayford____	hi geary
14:17	dangit	TimMc: Can you elaborate? What would p be?
14:17	drbobbeaty	gfredericks: Howdy, Gary!
14:17	gfredericks	hello Tom and Bob
14:18	gfredericks	~tcrayford is ðomas
14:18	clojurebot	Alles klar
14:19	tcrayford____	fanks gary
14:22	llasram	gfredericks: Gæry?
14:24	gfredericks	llasram: if you want to
14:25	hyPiRion	gœry
14:25	justin_smith	dangit: TimMc: sadly, the jvm doesn't provide that info
14:25	justin_smith	amazingly enough
14:26	gfredericks	~hyPiRion is a hyper ion
14:26	clojurebot	In Ordnung
14:28	ankanowat	what's the idiomatic way to convert a PersistentArrapMap to java.util.Map for interop with Java libs?
14:28	gfredericks	it already is one
14:29	ankanowat	it does implement the Map interface
14:29	ankanowat	why am i getting an error ... need to look deeper before more questions
14:29	noonian	what error are you seeing?
14:29	mi6x3m	Clojure I need a bit of a counseling. I am porting a GUI component which supports custom decorators. Currently a decorator is returned by the a method of the component class which can be overriden
14:29	andyf	perhaps the Java lib is trying to use a method in the interface that mutates the set contents, and those throw exceptions?
14:30	mi6x3m	also, one can set a decorator used for all sub-instances the component creates (it can copy itself)
14:30	mi6x3m	I want to emulate this with a dynamic var
14:30	mi6x3m	decorator
14:30	mi6x3m	but setting a binding wouldn't be enough, the value will have to be changed via set! sometimes
14:30	mi6x3m	and I don't know if it's a good idea
14:31	mi6x3m	tl;dr Is a dynamic var decorator a good idea
14:31	noonian	it would probably be easier to just pass in a function to use in sub-instances or something along those lines
14:32	mi6x3m	noonian: well this is the thing, you have no control over them once the parent component is created
14:32	mi6x3m	the class has a static method setDecoratorForSubInstances
14:32	mi6x3m	and this is all you got
14:33	noonian	so you're wrapping an existing java component? or trying to re-implement its functionality in clojure?
14:34	llasram	mi6x3m: Is the thing you pass in for that method an instance or a class or what?
14:36	mi6x3m	noonian: I am wrapping an existing java code
14:37	mi6x3m	yes, it's an instance of an interface
14:37	mi6x3m	and you pass that to a method
14:37	mi6x3m	basically you have 1. a method in the class XComponent you can overwrite, 2. a static method on XComponent to pass the decorator for subinstances
14:38	mi6x3m	I think i can use an additional parameter :decorator when constructing the object for the case 1.
14:38	mi6x3m	and just provide another api function for the case 2.
14:38	mi6x3m	set-default-decorator!
14:41	wink	did this end up here already? :) If you're using YYYY in your JVM service or %G in anything, fix it now https://news.ycombinator.com/item?id=8810157
14:42	gfredericks	sounds like a case for test.check :)
14:52	jasmin	hi all. need some assistance deploying to clojars
14:52	jasmin	whatever I try I keep getting ReasonPhrase: Forbidden
14:52	jasmin	is this the best place to get some assistance with clojars deployment?
14:53	jasmin	using lein deploy clojure with a very simple project I just can't get past ReasonPhrase: Forbidden
14:55	noonian	i half remember technomancy saying he disabled ssh uploads or something due to a security vulnerability
14:56	bacon1989	probably the RSA stuff, also you need to sign your stuff if it's not a snapshot
14:56	bacon1989	or something
14:56	jasmin	yes i am trying with https
14:57	jasmin	i've signed it but still nothing. do I have to send my keys with gpg for it to work?
14:57	jasmin	what keyserver to use?
15:09	llasram	jasmin: Are you certain you have your clojars credentials correct? Are you able to log in to the website in a browser with them?
15:10	jasmin	yes i am
15:10	jasmin	i am going insane trying to work this out. surely it can't be this hard to deploy to clojars
15:10	llasram	Whelp, then I'm out of ideas. It's generally not hard
15:10	jasmin	once I create my gpg key and send them to a keyserver does it take long for clojars to start authenticating my request to deploy? clojars probably isn't even using a keyserver right? that is why we are asked to paste the public PGP key into the Clojar profile right?
15:11	justin_smith	jasmin: gpg is just for creating signatures for verification
15:11	justin_smith	jasmin: are you deploying a version that is already up there? it will refuse to let you do that
15:12	jasmin	i've had a look and can't find it. i've also tried to deploy under org.clojars.jasminsehic and that has the same problem
15:13	jasmin	is there something in lein i can use to get more verbose details of failure?
15:13	justin_smith	#leiningen may be helpful
15:14	jasmin	very quiet there
15:15	jasmin	can someone confirm I should be able to deploy to classic clojars under any unused group id/artifact without having to sign anything?
15:15	TimMc	jasmin: Did you say you were using "lein deply clojure"? Shouldn't that be "lein deploy clojars"?
15:15	jasmin	or is that only applicable to snapshots?
15:16	TimMc	Signing should be irrelevant.
15:16	justin_smith	not under "any unused group id" - you need perms to the group you are deploying to
15:16	jasmin	sorry yes lein deploy clojars..i typed out the wrong text in chat here
15:16	TimMc	ok
15:17	jasmin	even if its a brand new group?
15:17	justin_smith	not sure of that actually
15:18	TimMc	I think deploying to a new group creates it.
15:18	jasmin	i don't think that is the problem as I can't even deploy to the pre-allocated org.clojars group
15:18	TimMc	(and that anyone can just create a group like that)
15:18	gfredericks	TimMc: that's always happened for me, especially by accident
15:19	TimMc	nod
15:19	jasmin	is there a tool to verify the syntax of the clj files?
15:19	gfredericks	read will tell you if it's readable
15:19	TEttinger	parenthesis/bracket matching is most of it.
15:20	gfredericks	and eastwood will attempt to do most of everything else
15:20	jasmin	I've found one article that says Clojars gives ReasonPhrase: Forbidden when the project.clj has unknown parameters
15:20	jasmin	but for the life of me it all looks good
15:20	justin_smith	"lein do check, eastwood" catches most of the basic stuff
15:21	justin_smith	jasmin: project.clj is super freeform, I don't see why lein would care about unknown parameters
15:21	justin_smith	now if it isn't even readable, that's another thing entirely
15:21	justin_smith	any basic lein command should be informing you of that though
15:22	TimMc	I don't think clojars looks at the project.clj, but the pom.xml that is generated.
15:23	jasmin	yes that is what it looks like and pom.xml gets generated ok
15:24	dnolen_	required reading for ClojureScript REPL maintainers https://github.com/clojure/clojurescript/wiki/Custom-REPLs
15:24	dnolen_	cemerick: ^ I'm not sure if the Weasel guy hangs out here
15:24	jasmin	i've tried using my email address and my login as the username when it prompts me when doing lein deploy clojars but still it fails
15:24	dnolen_	custom REPL maintainers I should say
15:25	gfredericks	jasmin: you've created an account on clojars.org?
15:25	jasmin	yep
15:25	jasmin	i've been at this now for 4 hours
15:29	jasmin	does groupid and artifact in defproject have restriction on characters that can be used. e.g. would a hypen (-) be an invalid character? it is not for pom.xml
15:30	gfredericks	I've used hyphens plenty
15:30	gfredericks	java people don't seem to mind hyphens outside of their source code
15:34	jasmin	uh uh
15:34	jasmin	Project names containing uppercase letters are not recommended
15:34	jasmin	and will be rejected by repositories like Clojars and Central
15:35	llasram	jasmin: Was that your problem?
15:35	jasmin	apparently there is an env var LEIN_BREAK_CONVENTION that will let me override this
15:36	jasmin	trying now
15:36	gfredericks	(defproject com.gfredericks/AllLower-CaseOne_Word "0.1.0-SNAPSHOT"
15:36	justin_smith	gfredericks: my favorite wifi password is "all one word, no spaces"
15:36	jasmin	that works for you?
15:36	jasmin	lol
15:36	llasram	jasmin: Err, the "forbidden" error you reported later doesn't jibe with a problem that should fix
15:37	gfredericks	justin_smith: with the network name "down currently, sorry for the inconvenience"
15:38	cemerick	dnolen_: great, thanks
15:38	jasmin	it works holy mother
15:38	TimMc	wut
15:39	jasmin	can't have caps in group id or artifact id
15:39	dnolen_	cemerick: happy to relax the requirements if there's some unsatisfied need - but the whole idea here is for REPLs to have to do a lot less
15:39	TimMc	That seriously did it?
15:39	dnolen_	cemerick: basically nothing after -setup
15:39	dnolen_	cemerick: the whole libs tracking stuff was crazy
15:39	jasmin	yep..there goes another 4 hours spent on fighting tools
15:40	TimMc	Jasmin and the Fighting Tools
15:40	TimMc	Hmm, doesn't relaly work as a band name.
15:40	jasmin	hahah
15:40	gfredericks	I'm still confused about the order of events here
15:40	gfredericks	you had a project with capital letters this whole time?
15:40	jasmin	Fighting Foos maybe
15:41	cemerick	dnolen_: sounds good; I haven't touched these things in so long, I don't even remember what libs tracking is :-)
15:41	cemerick	lucky me
15:41	TimMc	You might open an issue with clojars to provide informative deny for group and artifact names.
15:41	dnolen_	cemerick: having to track which libs have loaded to avoid stupid Closure errors
15:41	TimMc	(You may have to implement it yourself though.)
15:41	cemerick	ah, that
15:41	jasmin	yes..project had capital letters in it..matches the class name
15:42	dnolen_	cemerick: the solution is to just monkey patch goog.isProvided_ and allow libs to load multiple times
15:42	gfredericks	jasmin: but you didn't read that warning from leiningen until 5 minutes ago?
15:42	jasmin	sure I will post an issue with clojars
15:42	jasmin	lein just needs to be a bit more verbose on failure in general..
15:42	dnolen_	cemerick: and the REPL infrastructure can do the right thing provided that CLOSURE_IMPORT_SCRIPT is bound to a function that knows how to load the dep in the JS runtime
15:43	jasmin	what warning?
15:44	gfredericks	jasmin: the one you get with `lein new FightingTools` and can bypass with LEIN_BREAK_CONVENTION
15:44	gfredericks	which you quoted earlier
15:44	jasmin	I found that in depths of desparation..using lein new to generate a brand new project.clj
15:45	jasmin	once I gave it the name it gave me that output
15:45	gfredericks	oh okay; so somehow missed it when creating the original project
15:46	jasmin	I created the project by hand originally..only 3 lines to it
15:46	gfredericks	ah ha
15:46	gfredericks	okay that makes more sense
15:47	TimMc	jasmin: Lein's idea of good project names and clojars' restrictions are not necessarily in sync, though.
15:47	justin`	what's the reason clojurescript's bit-or operation yields diferent results than clojure's?
15:48	gfredericks	with what args?
15:48	jasmin	yes. thanks for help guys, much appreciate it
15:48	gfredericks	might be those pesky doubles
15:48	jasmin	off to get some zzzz
15:48	justin`	(apply bit-or '(557831 1082379 98306 33564957 134236965))
15:48	gfredericks	,(apply bit-or '(557831 1082379 98306 33564957 134236965))
15:48	clojurebot	169471807
15:49	justin`	cljs is giving me 1607439
15:49	gfredericks	I think that's well within Double's integer range...
15:49	gfredericks	but hm
15:49	gfredericks	I really have no idea what bit-or means in javascript actually
15:50	gfredericks	seems kind of ambiguous
15:50	dnolen_	justin`: might be a bug, should look at the generated JS
15:50	TimMc	&(map (partial apply bit-or) (partition 2 1 '(557831 1082379 98306 33564957 134236965)))
15:50	lazybot	⇒ (1607439 1147915 33663263 167799613)
15:50	dnolen_	gfredericks: all bit operations clamp to 32bit integer before application
15:50	gfredericks	,Integer/MAX_VALUE
15:50	clojurebot	2147483647
15:50	gfredericks	dnolen_: okay so it's semantically all integers
15:51	justin`	ok I'll dig a little deeper wasn't sure if I was missing something obvious
15:51	gfredericks	,(apply bit-or '(557831 1082379 98306 33564957))
15:51	clojurebot	35237663
15:51	TimMc	justin`: ^ Does the above differ from CLJS in all places, some, or none?
15:51	gfredericks	,(apply bit-or '(557831 1082379 98306))
15:51	clojurebot	1672975
15:51	gfredericks	still wrong with 3 nums
15:51	gfredericks	,(apply bit-or '(557831 1082379))
15:51	clojurebot	1607439
15:51	gfredericks	^ that's the first correct one
15:52	gfredericks	it's as if only the first two numbers are considered
15:52	TimMc	Himera doesn't allow pasting? Bleh.
15:52	gfredericks	this is according to himera
15:52	gfredericks	which allows pasting for me
15:53	dnolen_	justin`: this is probably just bug, I don't think I've ever use bit operations higher order
15:53	justin_smith	maybe it's ignoring all args after the first two?
15:53	gfredericks	seems to
15:53	gfredericks	(apply bit-or '(2 2 399482983)) ;; => 2
15:54	TimMc	Himera doesn't allow pasting in Firefox.
15:54	gfredericks	I'm using firefox
15:55	gfredericks	TimMc: we could keep going with this and discover that the only difference between you and me is our first names and that's what himera is discriminating with
15:55	TimMc	What version? v31.3.0 here.
15:55	dnolen_	gfredericks: oh right, bit ops aren't variadic in CLJS at the moment
15:55	dnolen_	only implement 2 argument arity
15:55	gfredericks	oh right it's not even about apply
15:55	TimMc	yikes
15:55	justin`	dnolen_: ok cool that makes sense then
15:55	gfredericks	broken directly too
15:55	dnolen_	justin`: simple patch is quite welcome - this is seriously low hanging fruit :)
15:56	dangit	justin_smith: Are you saying there is no way to get a PID from a spawned process in clojure??
15:56	lazybot	dangit: Definitely not.
15:56	justin`	dnolen_: O
15:56	justin`	dnolen_: cool I'll see what I can do :)
15:56	justin_smith	dangit: exactly, it's a stupid limitation of processes under the jvm, at least using Process / ProcessBuilder etc.
15:56	dangit	Wow
15:57	andyf	dangit: Stackoverflow may have partial answers, at least, e.g. http://stackoverflow.com/questions/4750470/how-to-get-pid-of-process-ive-just-started-within-java-program
15:57	llasram	dangit: unfortunately still relevant: http://blog.headius.com/2013/06/the-pain-of-broken-subprocess.html
15:57	justin_smith	$javadoc java.lang.Process
15:57	lazybot	http://docs.oracle.com/javase/6/docs/api/java/lang/Process.html
15:58	dangit	I’m not from a java background. This pain is all new to me :-(
15:59	dangit	andyf: That is the route I was going for, but I can’t get the pid out of the UNIXProcess.
15:59	justin_smith	dangit: how did you attempt to get it out?
16:00	dangit	http://pastebin.com/BBktFWTP
16:02	justin_smith	I think after setting the field accessible, you can just do (.pid (:process p))
16:03	justin_smith	also, to what end are you using the pid? There may be a less hacky option that does not require the pid.
16:05	TimMc	justin_smith: You have to use the Field instance that you set accessible to access the value.
16:05	justin_smith	TimMc: OK, I was not aware of that
16:13	augustl	is there a "make this clojure web app secure" ring middleware around? :)
16:13	andyf	augustl: Reroute all requests to /dev/null ? :-)
16:14	augustl	s/make/attempt to make/ ;)
16:14	augustl	I think friend + ring-anti-forgery should do it.. but what do I know
16:22	amalloy	i kinda think application security is something you have to think about a bit more than just sprinkling on some middleware like fairy dust
16:23	TimMc	andyf: Not enough, you also need to return malformed outputs so that you can possibly break the attacker's script. The best defense is a deniable offense.
16:23	gfredericks	{"status": e404}
16:24	SagiCZ1	TimMc: I chuckled
16:30	augustl	amalloy: well, sure, but it would be nice to not have to resort to something like Rails for secure defaults
16:30	augustl	I want to have my cake and eat it too :)
16:42	romain_	Hi everyone, anybody knows how to build the cljs compiler from source?
16:42	augustl	that's weird - https://github.com/ring-clojure/ring-anti-forgery/blob/f6f1edbaf4f78bea5128b3c36847b0de17d29d22/src/ring/middleware/anti_forgery.clj#L90
16:42	augustl	why doesn't it assoc the token onto the initial request as well?
16:43	augustl	the only way to get a hold of the token in the very first request is to read the dynamic var
16:44	augustl	I suppose it would be sort of weird to "fake" the session and assoc it in manually.. But that seems like a better option to me than forcing the use of dynamic vars
16:45	dangit	justin_smith: Yeah, that didn’t work
16:45	dangit	All I want to do is start up a local dynamodb instance for my tests
16:45	dangit	And I want to kill it after the tests run.
16:45	dangit	Unfortunately SIGTERM doesn’t seem to take it down.
16:47	justin_smith	dangit: did you actually look at the api docs? there is a .kill method on processes
16:47	justin_smith	sorry, it's .destroy
16:47	dangit	Yeah, destroy isn’t working.
16:47	dangit	I think it is sending SIGTERM
16:47	justin_smith	or .destroyForcibly (equivelent to -9)
16:47	dangit	that I didn’t see...
16:47	justin_smith	it's a really small API...
16:48	justin_smith	oh wait, .destroyForcibly is java 8 only
16:49	dangit	Yes, the API is even smaller than you suspect ;-)
16:49	justin_smith	hopefully using 1.8 jvm is an option for you
16:49	dangit	I suppose it is. What a big hammer, though.
16:52	SagiCZ1	when i add more bindings in for or doseq, it acts as an inner loop.. this is desirable most of the time, but what if i want to iterate two things at once in one loop?
16:53	SagiCZ1	,(doseq [i (repeat 3 :a) y (range 3)] (println i y))
16:53	clojurebot	:a 0\n:a 1\n:a 2\n:a 0\n:a 1\n:a 2\n:a 0\n:a 1\n:a 2\n
16:53	SagiCZ1	i want this to print just 3 rows
16:53	justin_smith	(for [[a b] (map list seqa seqb)] ...)
16:53	SagiCZ1	i see
16:53	SagiCZ1	this can work with doseq as well right?
16:53	justin_smith	yeah
16:53	noonian	,(map println (range 3) (repeat 3 :a))
16:53	clojurebot	(0 :a\n1 :a\nnil 2 :a\nnil nil)
16:53	andyf	That or loop, but if you like for or doseq, justin_smith's suggestion is the best I know
16:54	SagiCZ1	,(for [i (map list (repeat 3 :a) (range 3))] (println i))
16:54	clojurebot	((:a 0)\n(:a 1)\nnil (:a 2)\nnil nil)
16:54	SagiCZ1	oh println is dumb here.. sorry
16:54	SagiCZ1	ok thanks, i understand this will work for me
16:55	noonian	,(map (comp println str) (range 3) (repeat 3 :a))
16:55	clojurebot	(0:a\n1:a\nnil 2:a\nnil nil)
16:55	noonian	,(println 1 :a)
16:55	clojurebot	1 :a\n
16:55	noonian	printing is just weird with clojurebot
16:56	SagiCZ1	is it?
16:56	SagiCZ1	apart from adding \n instead of makin an actual new line it works i think
16:56	noonian	returns newlines as a string and at the same time as the return value is printed (same time means in the same irc message)
16:56	justin_smith	noonian: println inside constructing a value in a repl does the same thing
16:56	SagiCZ1	noonian: my REPL does the same
16:57	justin_smith	random interleave of printed values and return values
16:57	SagiCZ1	its because printing is not atomic or what not
16:57	gfredericks	,(range)
16:57	clojurebot	(0 1 2 3 4 ...)
16:58	gfredericks	,(map (fn [_] (pr (range))) (range))
16:58	clojurebot	((0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 4 ...)(0 1 2 3 ...
16:58	noonian	works pretty well for me in the repl: https://www.refheap.com/95554
16:58	gfredericks	ha what
16:58	gfredericks	I did not expect that much output
16:58	gfredericks	and where are the nils
16:59	gfredericks	I guess it's chunking
16:59	justin_smith	yeah, thanks to chunking, the nils are somewhere after the last ... I guess
16:59	gfredericks	,(map (fn [_] (pr (iterate inc 1))) (iterate inc 1))
16:59	clojurebot	((1 2 3 4 5 ...)(1 2 3 4 5 ...)nil (1 2 3 4 5 ...)nil (1 2 3 4 5 ...)nil (1 2 3 4 5 ...)nil (1 2 3 4 5 ...)nil (1 2 3 4 5 ...)...)
17:00	gfredericks	that's a little more reserved
17:00	AimHere	Looks like clojurebot is using the Schneier algorithm that can do an infinite loop twice in 5 seconds
17:01	SagiCZ1	whats wrong with this?
17:01	SagiCZ1	,(let [lines [[3 2 3] [5 7 1]]] (map list lines (range lines)))
17:01	clojurebot	#<ClassCastException java.lang.ClassCastException: clojure.lang.PersistentVector cannot be cast to java.lang.Number>
17:01	Bronsa	,(range [3 2 3])
17:01	clojurebot	#<ClassCastException java.lang.ClassCastException: clojure.lang.PersistentVector cannot be cast to java.lang.Number>
17:02	Bronsa	SagiCZ1: ^ that's what you're doing
17:02	SagiCZ1	oh.. there was supposed to be count there
17:02	SagiCZ1	(let [lines [[3 2 3] [5 7 1]]] (map list lines (range (count lines))))
17:02	SagiCZ1	ok thanks Bronsa
17:09	hellofunk	,(= (let [lines [[3 2 3] [5 7 1]]] (map list lines (range (count lines)))) (let [lines [[3 2 3] [5 7 1]]] (map list lines (range)))
17:09	clojurebot	#<RuntimeException java.lang.RuntimeException: EOF while reading>
17:09	hellofunk	,(= (let [lines [[3 2 3] [5 7 1]]] (map list lines (range (count lines)))) (let [lines [[3 2 3] [5 7 1]]] (map list lines (range))))
17:09	clojurebot	true
17:10	hellofunk	SagiCZ1: note you don't need the count or the lines in the range
17:10	amalloy	,(let [lines [[3 2 3] [5 7 1]] (map-indexed (fn [i x] [x i]) lines))
17:10	clojurebot	#<RuntimeException java.lang.RuntimeException: Unmatched delimiter: )>
17:10	amalloy	,(let [lines [[3 2 3] [5 7 1]]] (map-indexed (fn [i x] [x i]) lines))
17:10	clojurebot	([[3 2 3] 0] [[5 7 1] 1])
17:11	hellofunk	SagiCZ1: ^ that way also
17:17	[blake\|	O
17:17	[blake\|	Whoops.
17:18	[blake\|	I'm trying to "screen capture" an HTML page, one I've generated in Clojure (though CSS is involved) and trying to figure out a clean way to store the results and recall them later.
17:19	[blake\|	I've got html2canvas, which is cool but it's on the client side and I can't see how to pass the canvas back to the server. (I tried serializing it but it's got circular references, apparently.)
17:20	[blake\|	Feels like I'm doing it the hard way.
17:23	craigglennie	[blake\|: Can you call toDataURL on your canvas and pass that to the server?
17:24	[blake\|	craigglennie: Maybe! Let me see!
17:33	tolstoy`	Hm. defspec in test.check doesn't allow metadata for grouping tests.
17:34	tolstoy`	Selectors, as leiningen says it.
17:34	[blake\|	(inc craigglennie)
17:34	lazybot	⇒ 2
17:35	[blake\|	That might just work. I've got the data now, anyway. Thanks!
17:36	[blake\|	It's a PNG, which isn't awesome, but maybe the simplest solution.
17:41	craigglennie	[blake\|: you’re welcome
17:43	mi6x3m	llasram: still here?
17:44	mi6x3m	or noonian
17:44	mi6x3m	it's about the advantages of me having a method set-default-decorator!
17:44	noonian	hmm?
17:45	mi6x3m	noonian: remember our discussion about the decorators?
17:45	mi6x3m	for a GUI component
17:45	noonian	yeah, did you find something that works?
17:46	mi6x3m	well in the constructor function of the component I will have a :decorator argument for a decorator for that specific instance
17:46	mi6x3m	and I plan on having a method set-default-decorator! for the default decorator...
17:47	noonian	i think the set-default-decorator! is fine since you are wrapping a java thing and that is pretty much the existing interface
17:47	noonian	i'd still prefer passing in an argument if you can accomplish what you need to that way
17:48	mi6x3m	noonian: yes, well they are 2 different concepts. if you don't specify a decorator via :decorator, the default one will be used. the default is also used for the subinstances you have no control over.
17:49	mi6x3m	not exactly clojure by the book but oh well
17:49	mi6x3m	it's what the java component offers, no way around that
17:49	reiddraper	tolstoy`: (defspec ^:foo bar ...) doesn't work?
17:49	noonian	could you just have a :default-decorator you pass in as well to set the one used on sub-componenets?
17:50	mi6x3m	noonian: this is impossible to control through the Java component. set-default-decorator affects all subinstances of all constructed components
17:50	mi6x3m	there's no way to target the subinstances of one specific component
17:50	noonian	yeah, i think setting the default is fine then
17:51	SagiCZ1	how can i get around the fact that macros cant be apply-ied?
17:51	mi6x3m	noonian: thanks a bunch for listening and helping :)
17:51	mi6x3m	(inc noonian)
17:51	lazybot	⇒ 11
17:51	mi6x3m	helped me a lot
17:51	noonian	SagiCZ1: depending on the macro you can often wrap it in a function and apply that
17:52	noonian	mi6x3m: no problem, good luck!
17:52	SagiCZ1	ok
17:52	amalloy	SagiCZ1: by reframing your approach to one where applying a macro doesn't seem necessary
17:52	mi6x3m	SagiCZ1: apply is runtime, a macro is not :)
17:52	mi6x3m	can't work together at all
17:53	SagiCZ1	amalloy: ok, i have macro add-lines that takes [plot x y] where x and y are lists of points.. i have a function that returns [x y] in a vector.. i need to apply it
17:53	amalloy	why is add-lines a macro?
17:53	SagiCZ1	amalloy: i am not the author of that macro
17:54	amalloy	incanter?
17:54	SagiCZ1	yes
17:54	SagiCZ1	(apply #(add-lines %1 (first %2) (second %2)) plot (foo))
17:55	SagiCZ1	shouldnt this work?
17:56	SagiCZ1	(apply #(add-lines %1 %2 %3) plot (foo))
17:56	SagiCZ1	this one works though
17:57	amalloy	gross. there's no reason for that to be a macro at all. can you use add-lines*, or just write your own wrapper that does the same thing?
17:58	SagiCZ1	you looked at the source?
17:59	amalloy	yes
17:59	m1dnight_	I need some architecture help, anybody got a second to listen? :p
17:59	amalloy	~anyone
17:59	clojurebot	anyone is anybody
17:59	amalloy	i hate you, clojurebot
17:59	m1dnight_	I'll just go ahead :p
18:00	m1dnight_	I have a teeny tiny irc framework in clojure (as an exercise for architecture and clean code) but I'm having some issues with my abstraction
18:01	m1dnight_	Atm I have a loop that listens on a socket in a loop, dispatches on each message it reads. (privmsg and what not). But I have to send on the socket as well. So at the moment I just use a write-out function I built that takes the "bot" (ref {:socket s :user {:nick n}} and picks out the socket and writes to it
18:01	SagiCZ1	amalloy: thanks, it seems i can apply add-lines* without issues
18:01	m1dnight_	but, if I want to make it multithreaded (e.g., callbakcs for bot functionality) I should make sure that the socket is synchronized in some way and thus abstracted
18:02	m1dnight_	I'm thinking about making (write-out [msg]) put a function on a stack/queue in the bot, and creating a loop that executes each function on the socket
18:02	m1dnight_	anyone got a better idea?
18:03	m1dnight_	https://github.com/m1dnight/clojbot/tree/master/src/clojbot this is the source, if that interest someone
18:04	zophy	ok, i ran the lein script and it put a jar file in a directory.. so now what ?
18:06	zophy	oooh, i didn't use -jar.. silly me
18:08	amalloy	zophy: you should just be able to put lein's script on your PATH
18:08	amalloy	then run stuff like `lein new`, `lein jar`, whatever
18:18	zophy	oooh, i renamed lein as lein.sh, didn't know it was used beyond the download stage
18:24	dnolen_	http://swannodette.github.io/2014/12/29/nodejs-of-my-dreams/
18:25	dnolen_	give the new Node.js REPL a shot when you have time
18:25	dnolen_	for all the REPLs, in-ns, require finally work as expected
19:11	m1dnight_	I think I pooped my REPL
19:11	m1dnight_	I can do lein run fine (even lein clean && lein run), but lein repl fails
19:11	hellofunk	dnolen_: possible then to load a custom namespace and fns in the node repl? your example loads clojure.string, how about an original project?
19:11	m1dnight_	#<IllegalArgumentException java.lang.IllegalArgumentException: Don't know how to create ISeq from: java.lang.Character>
19:11	m1dnight_	nowhere a mention of the namespace of my current project
19:12	m1dnight_	any tips on how to clear some cache or something?
19:12	andyf	m1dnight_: Do you have a ~/.lein/profiles.clj file? If so, it may have a syntax error. Or your project.clj file.
19:12	andyf	You should be able to tell your current project by what directory you are in, yes?
19:13	m1dnight_	I just tried a lein repl in my home dir and that goes fine
19:13	m1dnight_	So might be indeed that my project.clj has a syntax error
19:13	andyf	so probably an issue with a project.clj file
19:13	m1dnight_	let me see
19:13	m1dnight_	strange though, that the lein run goes through fine
19:13	andyf	agreed.
19:14	andyf	It may not be a syntax error, as much as a data value of an unexpected type as the value for a key in your defproject. Not all commands use all of those values, so it could be a bad value for a key used by 'lein repl' that is not used by 'lein run'
19:15	m1dnight_	hold on, i'm going back to a default project.clj
19:15	andyf	From the error message, my first guess would be you have a string somewhere that a vector of strings is expected.
19:15	andyf	e.g. :source-paths or :test-paths
19:16	m1dnight_	oooh
19:16	m1dnight_	I think I just spotted it yes
19:16	andyf	When you do 'seq' on a string, you get a sequence of characters, so it can lead to error messages like that.
19:16	m1dnight_	andyf: I had a string on my :main, instead of without quotes
19:17	m1dnight_	(inc andyf)
19:17	lazybot	⇒ 19
19:17	m1dnight_	thanks a bunch man :)
19:17	andyf	np. Maybe Eastwood should try to find simple mistakes in project.clj files ...
19:18	andyf	except when run from the cmd line, project.clj has already been run before Eastwood begins, so would need some different way to run it, probably.
19:27	dnolen_	hellofunk: yep works, anything on the classpath as usual
19:35	amalloy	andyf: perhaps a separate piece of eastwood that runs without a project.clj, and analyzes your project.clj?
19:35	amalloy	i know lein plugin commands have some sort of no-project-needed option
19:43	andyf	amalloy: I may look into that. In this particular case, it seems like something that Leiningen itself could report with a better error message, too.
19:53	yedi_	anyone know of any resources of how to simply hook up basic transitions (fade-in, slide-out, etc) to state changes in the OM app-state?
19:56	andyf	A library called Bardo was announced on the ClojureScript Google group a couple of weeks ago: https://github.com/pleasetrythisathome/bardo You can read the discussion surrounding the announcement on the group.
19:56	andyf	Not sure if it is what you are looking for -- haven't used it myself.
19:59	augustl	hmm, bidi doesn't seem to play nice with a repl. (bidi.ring/make-handler ["" {"/" home-page-handler/show-home-page}]) seems to somehow keep a reference to the function that the symbol points to at evaluation time, instead of resolving the symbol every time
20:00	augustl	(bidi.ring/make-handler ["" {"/" (fn [req] (home-page-handler/show-home-page req))}]) makes it work fine
20:00	augustl	talking about reloading via repl eval
20:01	amalloy	augustl: #'show-home-page
20:02	augustl	amalloy: what is #' called? So I can google it :)
20:02	amalloy	,'#'inc
20:02	clojurebot	(var inc)
20:03	tolstoy`	sharp-tick
20:03	tolstoy`	or maybe not
20:04	andyf	augustl: The cheatsheet has a list of such symbols with some links to more info about most of them: http://jafingerhut.github.io Look for "Reader Macros" section
20:04	noonian	in clojure it is 'literal' or 'shorthand' or 'reader' syntax for vars
20:05	fairuz	augustl: http://conj.io/ calls it as var quote
20:10	augustl	andyf, fairuz thanks :)
20:27	fairuz	There's a function foo that accept [& args]. I want to call foo with (foo 123 456) but now I have [123 456] stored in bar instead, so calling (foo bar) will be wrong. How can I convert [123 456] to 123 456?
20:28	Pistahh	(appy foo bar) ?
20:28	Pistahh	(apply ...)
20:28	fairuz	ah cool
20:29	fairuz	thanks Pistahh
20:29	Pistahh	np :)
20:52	DomKM	Is anyone familiar with how feature expressions and macros in CLJS will work?
20:53	DomKM	Specifically, will macros defined in foo.cljc be available to CLJS code within that same file?
21:22	djames	Should I expect lein compile to find and compile (gen-class) forms in my code? I know it finds (ns (:gen-class ...))
21:22	djames	Something unexpected is going on -- I'm trying to rule out some problems.
21:24	amalloy	djames: it should, so long as those forms are in namespaces that get compiled
21:29	djames	amalloy: thanks
21:30	djames	amalloy: I'm wondering if I need to think about using two passes. My `lein compile` is failing because (I think) a function references the class; e.g. foo.Bar. I thought the compile would happen first, eliminating the problem.
21:31	djames	Right now I'm putting all the gen-class stuff into a separate file and only referencing in from another file
21:32	djames	^ "a function references the class before it is compiled" I meant to say
22:00	theme2	Hi
22:00	theme2	I am new to clojure
22:02	theme2	I still don't fully understand quoting and macros, but clojure looks pretty promising to me
22:14	fairuz	theme2: hey. welcome :)
22:15	theme2	fairuz: late answer O_o
22:15	theme2	but later is better than never :)
22:18	TEttinger	theme2, yeah it's vacation for a lot of people and I assume that a lot of regulars are away from IRC
22:18	theme2	TEttinger: no problem :)
22:19	TEttinger	clojure is a very very expressive language
22:19	TEttinger	I really find its ability to handle complex data cleanly and simply is almost unmatched
23:36	rritoch	Does anyone know of any leiningen plugins or clojure libraries to use SableCC in a clojure project?
23:42	rritoch	All I can find is a maven plugin, sablecc-maven-plugin but it isn't clear how I can get leiningen to execute the compiler from leiningen.
23:58	andyf	If there is a Java API, you can write some Clojure code to call that, but I have no idea how complex it might be.