#clojure – 2014-12-30

2014-12-30

00:00	rritoch	andyf: This is effectively a code generator that generates java code from a .grammar file so it needs to run before javac
00:02	rritoch	andyf: It is a command line tool, I'm assuming that the maven plugin handles downloading and executing the compilation process for maven projects, and I'd like to do the same from a leiningen project.
00:04	andyf	ok, not aware of anything there. The generation of code sounds similar to the way cljx generates Clojure/Java and ClojureScript code from common source files before the rest of compilation proceeds, but I think in that case you have to enter a separate Leiningen command first -- I believe it is not integrated in the way you describe.
00:08	luxbock	rritoch: creating your own SableCC watching task with https://github.com/boot-clj/boot/wiki might be easier than with Leiningen
00:10	rritoch	luxbock: Thanks for the suggestion. This is my first time seeing that project.
00:12	luxbock	the version 2.0 is rather new, so there might be some rough edges, but I think the ideas behind it are very promising
00:12	luxbock	I haven't used it myself yet but I plan to
00:12	rritoch	andyf: It sounds like I'd need to make a leiningen plugin myself than. Is there a standard place for dropping executables needed by leiningen plugins? I would think it should go into the .m2 folder, but I don't see anything in my m2 folder thats executable.
00:12	luxbock	the #hoplon channel is very helpful for Boot related problems
00:14	andyf	rritoch: I don't know. If you just needed to hack something up, rather than distribute something others can use, it seems you should be able to put an executable anywhere in your command path.
00:14	rritoch	luxbock: I'm going to need to look into boot more. Leiningen has a lot of issues related to build-order which can be very frustrating to deal with, and if it has a good solution for third party compilers than I may be better off changing the platform.
00:15	rritoch	andyf: Ok thanks. It sounds like a gray area. I've run into the same issue with phantomjs where there's really no standard place to drop third party command line tools.
00:18	celwell	Does anyone know how I can easily get the client's IP address? I.e., the equivalent of $_SERVER['REMOTE_ADDR'] in PHP. I'm running ring on a Tomcat server.
00:19	rritoch	andyf: If I did make a plugin like this I'd probably want it distributed just to save the next-developer with this issue some time. But there should be some standard "safe" place to drop command line tools. I'll poke around the leiningen script to see if maybe there's something undocumented that's already available.
00:21	andyf	There's also the #leiningen IRC channel, and an email list for Leiningen, where people may know an answer. The IRC channel might be a bit lower populated than usual, and asking here is usually at least a good a place to ask as there, on IRC at least.
00:22	rritoch	calwell: You get all that information from the servlet request http://docs.oracle.com/javaee/6/api/javax/servlet/ServletRequest.html#getRemoteAddr()
00:26	rritoch	andyf: I'm also in #leiningen, but I don't think technomancy is around. I also prefer IRC since it is much less formal and there's less chance of clients reading it.
00:28	rritoch	andyf: The last thing I want are my clients to start asking me to build them programming languages for their end users. I'm having a hard enough time doing it for myself. This is nothing more than a proof of concept project.
00:29	rritoch	andyf: Trying to produce a C language interpreter that can define operators at runtime. Effectively a LISP that uses C syntax.
00:31	andyf	I've run across 1 or 2 interpreters for C-like languages, but not one based on a Lisp before, unless you count the data format I've heard about used within GCC as an intermediate compilation format.
00:37	rritoch	andyf: This is the resurrection of an issue that I ran into using the Pike language which is similar to C. Clojure is the first language I've ever modified, though I've studied compiler design for awhile. I'm trying to go from theoretical to a practical application, and LISP is really an ideal backend since it is so mutable and concepts can be tested and debugged much more quickly from LISP.
00:38	rymndhng	does anyone know in Datomic what the difference is between :db.unique/identity and :db.unique/value -- I'm assuming that for non-ref types, they're the same thing?
00:42	rritoch	andyf: I acctually have a lot of the framework in place for this already, and by extending JCPP I was able to quickly produce a preprocessor with the features I need. SableCC seems to be the best tool for building the compiler so that is where I'm at now.
00:43	rritoch	andyf: But getting seemless integration between clojure and the SableCC produced code is going to take some effort.
00:44	andyf	you've considered simply having a separate manual step to run SableCC to generate Java, followed later by Leiningen commands for building Java and/or Clojure?
00:44	andyf	wrapped up in a bash script or something?
00:45	rritoch	andyf: I have considered compiling the C like language directly to LISP which would be ideal, but that is probably beyond my current capabilities.
00:45	andyf	SableCC compiles the C-like language to Java source code?
00:45	rritoch	andyf: Yes, that is what I'm going to do to get started, but I wanted to ask if any resources were already available so I'm not re-inventing too many wheels.
00:46	andyf	Unless you need that automated within Leiningen itself, seems you could consider making it a separate step to generate the Java first.
00:48	rritoch	SableCC: Not exactly. SableCC produces java source code to do all of the lexical analysis and parsing. Action classes are responsible for generating the final output, which could be anything from bytecode to an interpreter.
00:51	rritoch	andyf: Once the java classes are produced I would believe I could write all the action classes in clojure
00:52	rritoch	andyf: Outputing clojure code is probably a possiblity, but I'm starting with the interpreter direction since that should be slightly easier.
00:55	rritoch	andyf: If I ever make it to the point of outputing clojure code that would have some powerful implications since it would then be possible to compile almost any language into clojure.
00:56	rritoch	andyf: But that isn't really my goal.
01:06	rritoch	andyf: Now if I could do the opposite, compile clojure forms into C language, that is something that would be extremly useful when combined with OpenCL, but I've never seen any technology that can do it.
01:07	rritoch	andyf: I had a client ask for that but it was and still is, beyond my capabilities since there's no JVM in most OpenCL driven hardware.
02:20	fairuz	If I have something like [{:name "foo" :age 22} {:name "bar" :age 44} {:name "meh" :age 22}]. Is there any easy way to know if "foo" is inside this vector?
02:26	akkad	find-if?
02:28	fairuz	akkad: Is this not in core? Which lib can I find find-if?
02:30	justin_smith	,(some (comp #(= % "foo") :name) [{:name "foo" :age 22} {:name "bar" :age 44} {:name "meh" :age 22}])
02:30	clojurebot	true
02:31	justin_smith	change "some" to "filter" if you want to get all matches, or (comp first filter) if you want to get the first match
02:33	fairuz	neat. Thanks. I'll never find this on my own :)
02:34	Empperi	'some' is one of those wierdly named functions which has a sensible reason to be named like that
02:34	Empperi	:)
02:34	justin_smith	fairuz: you know about the cheatsheet right? and grimoire
02:35	justin_smith	http://clojure.org/cheatsheet
02:35	justin_smith	http://conj.io/
02:35	fairuz	justin_smith: Yes. I was looking into conj.io. Did find some but have no idea idea combining it with comp
02:36	justin_smith	fairuz: there is probably a at least 3 useful ways to use comp with just about every clojure function
02:36	Empperi	lol, so true
02:36	Empperi	clojure is a functional language and those are all about function composition
02:37	Empperi	which comp does
02:38	jw	is the grimoire up to date?
02:38	theme2	How do I test if a character is upper case?
02:40	justin_smith	,(Character/isUpperCase \B)
02:40	clojurebot	true
02:40	justin_smith	,(Character/isUpperCase \b)
02:40	clojurebot	false
02:40	theme2	thanks
02:41	Empperi	,(map #(Character/isUpperCase %) "asdfBcsd")
02:41	clojurebot	(false false false false true ...)
02:41	justin_smith	,(Character/isUpperCase \☃)
02:41	clojurebot	false
02:41	theme2	justin_smith: that character looks like a circle pointing up
02:41	justin_smith	theme2: it is a snowman
02:42	theme2	O_o
02:42	theme2	doesn't work on tryclj.com
02:42	justin_smith	http://www.utf8-chartable.de/unicode-utf8-table.pl?start=9728
02:43	justin_smith	oh, I think tryclj may be clojurescript?
02:43	theme2	O_o
02:44	justin_smith	wait no, Character/isUpperCase works in tryclj
02:44	Empperi	,(reduce (every-pred true?) (map #(Character/isUpperCase %) "ASD"))
02:44	justin_smith	or do you mean snowman doesn't work in tryclj?
02:44	clojurebot	true
02:44	Empperi	,(reduce (every-pred true?) (map #(Character/isUpperCase %) "aASD"))
02:44	clojurebot	false
02:44	theme2	justin_smith: "java.lang.RuntimeException: Unable to resolve symbol: isUpperCase in this context"
02:44	Empperi	ok, got carried away
02:44	jw	would Character/isUpperCase be valid in clojurescript?
02:45	justin_smith	theme2: no
02:45	Empperi	jw: no, it's java call
02:45	justin_smith	err sorry
02:45	justin_smith	jw, no it would not
02:45	jw	ok, yeah that's what I was thinking...
02:45	justin_smith	theme2: what does you call look like? it should work
02:45	theme2	justin_smith: (Character/isUpperCase \b)
02:46	theme2	,(Character/isUpperCase \b)
02:46	clojurebot	false
02:46	theme2	-_-
02:46	theme2	wtf
02:46	justin_smith	theme2: that exact call works in tryclj for me
02:46	theme2	wtf
02:46	theme2	refreshed and doesn't work
02:48	Empperi	Give me some Clojure:
02:48	Empperi	> (Character/isUpperCase \b)
02:48	Empperi	false
02:48	theme2	,(print "wtf")
02:48	clojurebot	wtf
02:48	Empperi	straight copy-paste from tryclj
02:49	theme2	by any chance, does tryclj use locally installed java?
02:49	theme2	> (Character/isUpperCase \b)
02:49	theme2	,(Character/isUpperCase \b)
02:49	clojurebot	false
02:50	theme2	_
02:50	theme2	orz
02:58	theme2	,(str (filter #(Character/isUpperCase %) "abc"))
02:58	clojurebot	"clojure.lang.LazySeq@1"
02:58	theme2	what is that?
02:59	theme2	nvm
03:02	Empperi	,(type (filter true? [true]))
03:02	clojurebot	clojure.lang.LazySeq
03:02	Empperi	it's that :)
03:05	dagda1_	how do I reference clojure 1.7 in my project.clj
03:05	dagda1_	or how can I use transducers is really my question
03:06	Empperi	add clojure 1.7 as a dependency into your project.clj
03:06	Empperi	[org.clojure/clojure "1.7.0-alpha4"]
03:10	justin_smith	theme2: try apply str
03:11	justin_smith	,(apply str (filter (Character/isUpperCase %) "aBcD"))
03:11	clojurebot	#<CompilerException java.lang.RuntimeException: Unable to resolve symbol: % in this context, compiling:(NO_SOURCE_PATH:0:0)>
03:11	justin_smith	,(apply str (filter #(Character/isUpperCase %) "aBcD"))
03:11	clojurebot	"BD"
03:21	theme2	,
03:21	clojurebot	#<RuntimeException java.lang.RuntimeException: EOF while reading>
03:21	theme2	,()
03:21	clojurebot	()
03:21	theme2	,(())
03:21	clojurebot	#<ClassCastException java.lang.ClassCastException: clojure.lang.PersistentList$EmptyList cannot be cast to clojure.lang.IFn>
03:21	theme2	,((()))
03:21	clojurebot	#<ClassCastException java.lang.ClassCastException: clojure.lang.PersistentList$EmptyList cannot be cast to clojure.lang.IFn>
03:21	theme2	O_o
03:22	justin_smith	() is unambiguous, so it does not need quoting
03:22	theme2	,()()
03:22	clojurebot	()
03:22	theme2	what?
03:22	clojurebot	what is not a bug
03:22	theme2	O_o
03:22	justin_smith	() is always an empty list
03:22	theme2	x?
03:22	theme2	wat?
03:22	theme2	what?
03:22	clojurebot	what is this
03:23	theme2	-_-
03:23	theme2	,'(1)()
03:23	clojurebot	(1)
03:23	justin_smith	lazybot, is it time for bed???
03:23	lazybot	justin_smith: How could that be wrong?
03:23	justin_smith	seeya
04:11	krat0sprakhar	,(println "wassap people")
04:11	clojurebot	wassap people\n
04:29	hellofunk	,(apply str (interpose " " [(apply str (seq (concat "no" "thing"))) "much"]))
04:29	clojurebot	"nothing much"
04:39	tsunny	hello clojurebot
04:40	tsunny	(+ 1 2)
04:40	clojurebot	3
04:41	tsunny	(println "Clojure Bot is Cool")
05:03	theme2	,(println "Clojure Bot is Cool")
05:03	clojurebot	Clojure Bot is Cool\n
05:03	theme2	,(print "Clojure Bot is Cool")
05:03	clojurebot	Clojure Bot is Cool
05:03	theme2	:)
05:21	hellofunk	(print "no comma")
05:21	hellofunk	(println "no comma")
05:21	theme2	,(print "no comma")
05:21	theme2	:)
05:21	clojurebot	no comma
05:21	hellofunk	(+ 1 3)
05:21	clojurebot	4
05:21	hellofunk	huh. no comma there
05:22	theme2	(print "no comma")(1)
05:22	theme2	(print "no comma") 1
05:22	theme2	(print "no comma") '(1)
05:22	theme2	,(print "no comma") '(1)
05:22	clojurebot	no comma
05:22	theme2	-_-
05:22	hellofunk	weirdness
05:22	theme2	weird
05:22	hellofunk	jinx
05:23	theme2	,(print "Clojure bot is weird")
05:23	clojurebot	Clojure bot is weird
05:23	theme2	,(println "I am weird")
05:23	clojurebot	I am weird\n
05:24	theme2	,(println "\\\\\\\\\\\\\\\\\\\")
05:24	clojurebot	#<RuntimeException java.lang.RuntimeException: EOF while reading string>
05:24	theme2	,(println "\\\\\\\\\\\\\\\\\\\\")
05:24	clojurebot	\\\\\\\\\\\n
05:24	theme2	extra n :)
05:24	theme2	,(doc clojurebot)
05:24	clojurebot	Titim gan éirí ort.
05:24	theme2	lol
05:28	hellofunk	clojurebot: explain yourself!
05:28	clojurebot	excusez-moi
05:28	hellofunk	clojurebot: i said, explain yourself!
05:28	clojurebot	It's greek to me.
05:28	hellofunk	clojurebot: explain yourself!
05:28	clojurebot	Titim gan éirí ort.
05:28	theme2	,(recur)
05:28	clojurebot	eval service is offline
05:28	theme2	whoops
05:29	hellofunk	you broke the bot
05:29	hellofunk	,(println "we are sorry")
05:29	clojurebot	we are sorry\n
05:29	theme2	,(fn [] (recur))()
05:29	clojurebot	#<sandbox$eval239$fn__240 sandbox$eval239$fn__240@2d0df534>
05:29	theme2	,((fn [] (recur)))
05:29	clojurebot	eval service is offline
05:29	theme2	,(print "test")
05:29	clojurebot	test
05:29	theme2	,((fn [] (recur)))
05:29	theme2	,(print "test")
05:29	theme2	,(print "test")
05:29	theme2	,(print "test")
05:29	theme2	,(print "test")
05:29	clojurebot	eval service is offline
05:29	clojurebot	test
05:29	clojurebot	test
05:29	clojurebot	test
05:29	clojurebot	test
05:30	theme2	lol
05:40	m1dnight_	Is there an idiomatic way to raise and handle events in clojure?
05:41	m1dnight_	Atm I have the idea of writing a function that says "(subscribe :event <fn>)" that will add this function to a list, and when :event happens, trigger all functions in that list
05:41	m1dnight_	but I think there is a better way
05:41	brainproxy	m1dnight_: maybe something like https://github.com/clojurewerkz/meltdown
05:42	brainproxy	though, there might be something similar which is based on core.async, not sure
05:42	m1dnight_	hmm, something like that yes
05:47	m1dnight_	perhaps channels are an other way to go about it
05:48	brainproxy	sure, you can build little loops and do all sorts of stuff even w/in a single thread
05:48	brainproxy	if you use the (go ...) and (go-loop ...) macros
05:49	m1dnight_	Well the architecture I'm building is a loop that receives messages and I want to subscribe multiple modules to it. Each module should look at each message that is produced by the loop and determine for itself it want sto do something with it or not
05:49	m1dnight_	So i'm thinking, each module will create a channel to the loop, and the loop will put each message on each channel it has available
05:49	m1dnight_	something like that might do the trick
05:49	brainproxy	have you looked over core.async's API?
05:50	m1dnight_	I've got my cojure book by hand and on that now :)
05:50	brainproxy	there are facilities for pub/sub, etc.
05:50	m1dnight_	hrm, neither books I have contain chapters about core.async (or channels)
05:51	brainproxy	https://github.com/clojure/core.async
05:51	brainproxy	http://clojure.github.io/core.async/
05:52	m1dnight_	I think it might be interesting to go about it with core.async yes
05:53	m1dnight_	thanks for the links brainproxy !
05:53	m1dnight_	(inc brainproxy)
05:53	lazybot	⇒ 4
05:53	luxbock	m1dnight_: check out the core.async videos from the Clojure Conj
05:58	m1dnight_	cool :) Looking at a video by Timothy Baldridge
05:58	m1dnight_	thanks for the hints
05:58	m1dnight_	oh well, it's christmas!
05:58	m1dnight_	(inc luxbock)
05:58	lazybot	⇒ 2
06:06	slipset	core.async has pub/sub as well http://yobriefca.se/blog/2014/06/04/publish-and-subscribe-with-core-dot-asyncs-pub-and-sub/
06:28	slipset	I've tried to implement a version of the sleeping barber problem (http://en.wikipedia.org/wiki/Sleeping_barber_problem) using core.async
06:29	slipset	code is here: https://gist.github.com/slipset/fb7d2a44303481731d89
06:29	slipset	Problem is that the customer never gets to know if he has his hair cut or not.
06:30	slipset	Is there any way to know for someone who put! on a dropping-buffer if the value was dropped or not?
06:35	slipset	/whois luxbox
06:38	akkad	magic
06:40	slipset	luxbock: re transducers, I think Rich Hickey mentions in either this years conj or strange-loop talk that the transducer impl lets the collections which knows how to step themselves handle the operation internally.
06:42	slipset	luxbock: see bottom of this https://gist.github.com/runexec/06b56a9dbd15e43145b9
06:42	luxbock	slipset: thanks
07:03	Frozenlock	Anyone has a link to an example of Stuart Sierra's Component? I found this https://github.com/danielsz/system/tree/master/example/src/example, but there doesn't seem to be dependencies between the components.
07:06	slipset	frozenlock: could be something here http://www.uswitch.com/tech/more-open-source-clojure-systems-please/
07:08	Frozenlock	slipset: thanks!
07:21	mi6x3m	clojure what is the type for Java variadic args?
07:21	mi6x3m	X[] ?
07:21	mi6x3m	and how can I specify that in gen-class
07:33	SagiCZ1	it is an array yes
07:34	mi6x3m	SagiCZ1: but how do you use it with gen-class? through the [L notation?
07:35	SagiCZ1	mi6x3m: i am not sure, let's wait for someone else
07:35	mi6x3m	good call :)
07:41	KU0N	Hello. Given (let [h {:foo "bar" :foo2 "bar"}]) how can I call function f with each key/val as argument, like (f :foo "bar") (f :foo2 "bar") ?
07:42	SagiCZ1	use map
07:43	SagiCZ1	,(map identity {:foo "bar" :a 0})
07:43	clojurebot	([:foo "bar"] [:a 0])
07:43	SagiCZ1	if you call seq on hash map, it creates a sequence of key value pairs
07:43	SagiCZ1	map calls seq for you and applies given function on each element of that seq
07:43	KU0N	Hoo, like hash.to_a in ruby. Ok.
07:43	KU0N	Thanks.
07:44	slipset	(map (fn [[k v]] [(name k) (keyword v)]) h)
07:44	slipset	,(let [h {:foo "bar" :foo2 "bar"}] (map (fn [[k v]] [(name k) (keyword v)]) h))
07:44	clojurebot	(["foo" :bar] ["foo2" :bar])
07:45	SagiCZ1	thats not necessary slipset
07:45	slipset	what's not necessary?
07:47	hyPiRion	,(let [h {:foo "bar" :foo2 "bar"}] (for [[k v] h] [(name k) (keyword v)]))
07:47	clojurebot	(["foo" :bar] ["foo2" :bar])
07:49	slipset	hyPiRion: cool, haven't used for much
07:49	hyPiRion	You can also go bonkers like me and implement the util fn beside.
07:49	hyPiRion	,(defn beside [& fs] (fn [vs] (mapv #(%1 %2) fs vs)))
07:49	clojurebot	#'sandbox/beside
07:49	hyPiRion	,(map (beside name keyword) {:foo "bar" :foo2 "bar"})
07:49	clojurebot	(["foo" :bar] ["foo2" :bar])
07:50	KU0N	I've been doing clojure for 1 hour, my head is going to explode:P
07:50	SagiCZ1	KU0N: it sure is intimidating at first
07:50	slipset	hyPiRion: btw really liked your fizzbuzz implementation :)
07:51	slipset	https://www.refheap.com/92860
07:51	hyPiRion	slipset: haha, thanks
07:52	hyPiRion	Quicksort is also neat: https://www.refheap.com/284a0552a6b69c6037faa2db5
07:52	KU0N	Mmh. (doto req #(map (.setRequestHeader %) headers) (headers being the key/val pairs) I know I'm doing something wrong.
07:53	slipset	hyPiRion: do you write this out manually, or do you have some secret clj-swj function?
07:53	SagiCZ1	KU0N: in interop you need to specify the object you are calling setRequestHeader on first.. and what parameters does the method have?
07:54	KU0N	.setRequestHeader name value
07:54	slipset	KUON: also, I would guess that req.setRequestHeader takes a key and a value as param?
07:54	thheller	KU0N: map is also lazy, so it won't execute since you don't consume the result
07:55	slipset	(map (fn [[k v]] (.setRequestHeader req k v)) header)
07:55	KU0N	(doto req (.setRequestHeader "Content-Type" "application/json")) this workds
07:55	thheller	(doseq [[key value] headers] (.setRequestHeader req key value))
07:55	slipset	would probably do the trick?
07:55	slipset	or maybe even mapv, as map is lazy as thheller points out
07:56	hyPiRion	slipset: I'm doing it manually for now, but I go through the same steps every time. I guess it shouldn't be impossible to implement a clj->swj translator
07:56	hyPiRion	Only thing I've done was automating number generation, but I don't know where that piece of code is
07:58	thheller	don't use map(v) if you don't need the result, building a collection you don't need is a waste of resources
07:58	KU0N	Yeah I was looking to something like each
07:59	thheller	thats what doseq is for basically
07:59	KU0N	Yeah, it works. Thanks a lot.
07:59	slipset	thheller: thanks
08:02	mi6x3m	can I use a class generated through gen-class with import?
08:02	mi6x3m	somehow it's not getting found?
08:09	mi6x3m	I need hints as to how to compile a gen-class class only once :)
08:26	slipset	curious, the core.async docs say eg unique is deprecated, use transformer instead.
08:26	slipset	should that read "use transducer instead."?
08:26	Bronsa	yeah
09:29	slipset	hmm, here's the answer to getting a message when a put! is dropped http://dev.clojure.org/jira/browse/ASYNC-55
09:30	slipset	not that I understood Ghadis answer though.
09:32	bacon1989	anyone know of a good resource on clojure destructors
09:32	bacon1989	like, a crap ton of examples
09:32	slipset	Jay Fields has a blog on it. Hang on...
09:33	slipset	http://blog.jayfields.com/2010/07/clojure-destructuring.html
09:33	Bronsa	bacon1989: you mean destructuring, not like OOP destructors right?
09:33	bacon1989	oh yeah, destructuring
09:34	bacon1989	thank you, this should do nicely
09:34	bacon1989	I left my oreilly clojure book at home
09:54	m1dnight_	Is anyone here a beginner-isj clojure dev that would like to help me out with my clojure irc bot thing? Just for fun? I alwyas wanted to co-author something
09:54	m1dnight_	never really had the chance
09:54	m1dnight_	I dont work on it that much, just from time to time
09:55	Empperi	I've already written on ircbot in clojure :P
09:55	Empperi	one
09:55	Empperi	just for fun too
09:55	m1dnight_	Yeah, I know there are plenty of them out there but the goal of this tiny project is to build something that has very clean architecture
09:55	m1dnight_	some interaction would be nice
09:56	m1dnight_	did you write lazybot, Empperi ?
09:56	Empperi	no
09:56	Empperi	it's my very own bot and no one else uses it
09:56	m1dnight_	github or something?
09:57	Empperi	https://bitbucket.org/niklas_collin/masterbot
09:57	Empperi	nothing too fancy or beautiful
09:58	m1dnight_	yay, dynamic loading. I want that too
09:58	m1dnight_	Atm I have a bot based on the PircBotX framework that used classloading for that purpose but it's not optimal yet
09:58	m1dnight_	And I want to replace it with a clojure implementation
09:59	Empperi	m1dnight_: don't get too excited yet https://bitbucket.org/niklas_collin/masterbot/src/7070bbc8d0a26914fe8ad384b931234415905e5b/src/masterbot/core.clj?at=default#cl-10
09:59	m1dnight_	oh snap :p
09:59	Empperi	shouldn't be too hard to implement
09:59	Empperi	but so far haven't needed it
10:00	m1dnight_	I havent found much when googling for hot swappable code though
10:00	Empperi	anyway, all that is really needed to define a new command is that require
10:00	m1dnight_	Do you have an idea how to go about it?
10:00	Empperi	sure, just evaluate all .clj files in certain directory
10:01	Empperi	and read them from there
10:01	Empperi	hiiiighly insecure to do that way but works
10:01	Empperi	:)
10:01	m1dnight_	https://github.com/m1dnight/infogroep-bot/blob/master/be/christophedetroyer/Main.java#L192
10:01	m1dnight_	this is how I do it in java atm
10:01	m1dnight_	but I get your point
10:01	m1dnight_	might try it out
10:36	slagyr	Anyone datomic developers online?
10:37	llasram	~anyone
10:37	Bronsa	slagyr: there is a #datomic channel
10:37	clojurebot	anyone is anybody
10:37	slagyr	Bronsa: I’m in #datomic too. It’s a bit slow.
10:38	llasram	slagyr: unless you're trying to get in touch with the developers of datomic, you're probably best off just asking your question
10:39	slagyr	Right. Will datomic behave well with a schema containing hundreds of thousands of attributes?
10:40	slagyr	I know it can support 2^20 attributes, but at what cost? Will it consume gobs of memory? Will queries slow to a crawl?
10:47	dnolen_	slagyr: probably better to ask your question on the Datomic ML
10:49	slagyr	dnolan_: ok thanks
11:03	dagda1_	why is korks often used as an argument name
11:07	ivan	dagda1_: key or keys
11:07	dagda1_	ivan: now I know!
11:14	visof	i guys
11:14	visof	hi
11:14	visof	what is the best way to send anything to tcp with ip and port?
11:15	llasram	visof: I usually use packets
11:16	visof	llasram: what is packets?
11:17	llasram	visof: Sorry, just me failing to be funny
11:17	llasram	visof: I'm actually just not sure what you're asking
11:18	visof	how can you open tcp connection and send something to it?
11:18	luxbock	visof: you could use Aleph: http://paulosuzart.github.io/blog/2012/07/09/tcp-server-with-clojure-aleph-and-gloss/
11:19	visof	i want to make tcp client
11:19	llasram	visof: Just for fun, or to achieve some other goal?
11:19	stuartsierra	visof: java.net.Socket
11:19	mfikes	Clojure Cookbook covers this topic: https://github.com/clojure-cookbook/clojure-cookbook/blob/master/05_network-io/5-09_tcp-client.asciidoc
11:22	stuartsierra	Watch out, folks!
11:22	stuartsierra	user=> (.format (SimpleDateFormat. "yyyy-MM-dd") (Date.))
11:22	stuartsierra	"2014-12-30"
11:22	stuartsierra	user=> (.format (SimpleDateFormat. "YYYY-MM-dd") (Date.))
11:22	stuartsierra	"2015-12-30"
11:22	Bronsa	woah wtf
11:22	m1dnight_	Right, I red about that bug
11:22	m1dnight_	read*
11:22	stuartsierra	I heard that broke Twitter a few days ago. :)
11:23	m1dnight_	I wonder where it stems from though
11:23	m1dnight_	can't find the url immediatly
11:23	visof	stuartsierra: what do you think about this https://github.com/gerritjvv/clj-tcp?
11:23	stuartsierra	It's a legitimate use case: "YYYY" gives you the year for the current week
11:23	visof	stuartsierra: what do you think about this https://github.com/gerritjvv/clj-tcp ?
11:24	Bronsa	so it's not a bug
11:24	Bronsa	just weird behaviour, neat
11:24	m1dnight_	http://stackoverflow.com/questions/18228284/java-simpledateformat-bug
11:24	m1dnight_	seems to be a fairly old bug?
11:24	m1dnight_	oh, nvm "bug" then :p
11:24	tcrayford____	jodatime doesn't support "year for the current week" ;)
11:24	tcrayford____	afaik
11:25	stuartsierra	It's not a bug in Java SimpleDateFormat, but it's a common bug in code which uses it.
11:25	stuartsierra	visof: I have no basis on which to form an opinion of that link.
11:25	mfikes	Perhaps it is a bug for code to ascribe meaning to YYYY-MM-dd, while it is legit to simply use YYYY in other contexts.
11:26	tcrayford____	stuartsierra: a usability bug if anything. APIs should help prevent their users from fucking up
11:30	visof	i'm in situation which need side-effects, i try to process something, and when i finish i update the status to done in redis, so i need to track status at redis from my clojure code if it done or not
11:30	visof	in imperative language i'm using while loop and check status and status value till status get done
11:31	visof	what is the best practice should do this in clojure or in functional language in general ?
11:31	visof	my think is atom
11:31	visof	and use the same as in imperative language
11:31	visof	but i'm asking about the best and elegant solution for this
11:32	justin_smith	visof: if it only gets done once, use a promise
11:32	justin_smith	or a future or delay, if there is a single expression that is known to deliver the value
11:33	justin_smith	realized? will tell you if it is don (ready for reading) or not
11:33	visof	yeah i got it
11:48	EvanR-work	idiomatic way, while doing a for or map, to "abort" or short-circuit end the computation, resulting in a nil or something
11:48	EvanR-work	?
11:48	EvanR-work	exceptions?
11:48	clojurebot	http://paste.lisp.org/display/74305
11:48	justin_smith	EvanR-work: for and map are lazy
11:48	justin_smith	just stop taking more values
11:50	llasram	EvanR-work: You can codify justin_smith's suggestion with `for` using a `:while` condition, and for any lazy sequence by wrapping in a `take-while`
11:50	justin_smith	if you care about the side effects from extra values accidentally produced, you should be using a doseq for the side effects, and using for or map only for the stateless part of the calculation
11:50	EvanR-work	no side effects
11:50	justin_smith	cool
11:51	EvanR-work	ok trying to grok this... so in the event of an error produce nil. then later something will check for an occurrence and return nil instead of the sequence
11:51	EvanR-work	at the first nil
11:54	tcrayford____	yeah, you can just use (take-while #(not (nil? %)) stuff) there
11:54	tcrayford____	as long as your seqs don't get chunked
11:54	m1dnight_	I think what they mean is just map your function over the list. This produces a lazy sequence. And where you want to abort you make your function return something (e.g., nil). Then you can take the produced part of your map result by using take-while.
11:54	EvanR-work	doesnt that give me the initial part
11:55	EvanR-work	i dont want any of it if an error occurs in the middle
11:55	justin_smith	EvanR-work: wait, OK, that's different
11:55	justin_smith	EvanR-work: would the exception be thrown in producing the sequence, or just a state you don't accept?
11:56	m1dnight_	doall, check with some nil, and then return nil or the sequence?
11:56	EvanR-work	producing. doall? why?
11:56	m1dnight_	oh wait no, indeed that would be wrong
11:56	m1dnight_	nvm that
11:56	justin_smith	EvanR-work: doall is needed because you need to decide before exiting scope what you are returning
11:56	EvanR-work	i cant just search for the first nil?
11:57	justin_smith	m1dnight_: no, it is perfectly correct, the only way to decide between a sequence and nil is to realize the full sequence
11:57	EvanR-work	the point is im trying to avoid computing the whole thing if an error occurs
11:57	EvanR-work	(which might be pointless since it will chunk like 30 items and i have probably less than that items per run)
11:58	justin_smith	(if (some nil? s) nil s)
11:58	justin_smith	that's all you need
11:58	justin_smith	some stops at the first nil
11:59	EvanR-work	yeah
11:59	EvanR-work	should work, im luckily not using nil for anything else ;)
11:59	m1dnight_	ooh right because S would be lazy
12:00	m1dnight_	you could use :error or something as well, EvanR-work
12:00	justin_smith	more generally you can have (try (test-every s) s (catch Exception e nil)) for exception oriented programming
12:00	EvanR-work	yeah i will need to use [:error "msg"] to explain the problem
12:00	EvanR-work	yeah exceptions
12:01	justin_smith	that sounds like you just want an exception then
12:01	justin_smith	once you get messages too, along with short circuiting
12:01	EvanR-work	ive been avoiding them in clojure because it seems i have to define a new module to get a new exception class
12:01	m1dnight_	just use ExceptionInfo
12:01	m1dnight_	you can piggyback on it to add data and a message
12:01	EvanR-work	i refuse to to catch all exceptions (unless theres something i dont know)
12:01	EvanR-work	ExceptionInfo?
12:02	m1dnight_	http://stackoverflow.com/a/16159584/1225786
12:02	m1dnight_	EvanR-work: ^
12:02	EvanR-work	cool
12:02	m1dnight_	Then you can even check if the exception is the type you want, if not, rethrow it
12:03	EvanR-work	... lovely..
12:03	EvanR-work	yeah so i have to do extra checking to differentiate between different uses of this exception
12:04	m1dnight_	I'm afraid so. I'm not sure if ExceptionInfo is used anywhere in clojure though.
12:05	EvanR-work	this would definitely be a control flow mechanism locally using exceptions
12:05	EvanR-work	annoying
12:05	EvanR-work	ExceptionInfo looks good for when i really want to throw an exception, right now ive been doing asserts
12:06	llasram	EvanR-work: What's your higher-level goal here?
12:06	EvanR-work	its a parser
12:07	EvanR-work	take trees of strings as input
12:07	EvanR-work	its turning out that i dont seem to be catching the parse failures anywhere inside the parser, so maybe i dont need to do it in a pure way
12:08	EvanR-work	i was cautiously thinking that some part of it needs to decide to backtrack if an error happens
12:09	llasram	Are the things you are parsing not arriving in a fashion which makes it convenient to use an off-the-shelf parser like instaparse?
12:13	EvanR-work	looks like it
12:20	EvanR-work	(after looking at instaparse, the text-based parser language reminds me of rubyisms, where if your language was based on data structures or s expressions you could more easily build these programs with program)
12:21	EvanR-work	(rather)
12:22	EvanR-work	in ruby languages usually take the form of a string or a big mutable object where phrases are spoken by using missing method invocations
12:24	llasram	EvanR-work: instaparse also provides a combinator interface
12:25	llasram	EvanR-work: The idea (as I understand it, not being the author) is that it provides the same convenience regular expressions provide for regular grammars, just for context-free grammars
12:26	EvanR-work	thats cool
12:27	EvanR-work	the patterns describing the top layer of my data are actually regular expressions, just not on streams of letters but streams of trees
12:31	EvanR-work	,(:Doc ex-info)
12:31	clojurebot	nil
12:31	EvanR-work	whats the cause argument?
12:31	stuartsierra	EvanR-work: `cause` is another exception you're wrapping.
12:32	stuartsierra	Just like the standard java.util.Exception constructors.
12:32	Bronsa	&(doc ex-info)
12:32	lazybot	⇒ "([msg map] [msg map cause]); Create an instance of ExceptionInfo, a RuntimeException subclass that carries a map of additional data."
12:32	stuartsierra	err, java.lang
12:49	mi6x3m	any experts on gen class around?
12:51	TimMc	Best to just ask your question.
12:52	TEttinger	but probably, yes, mi6x3m
12:52	mi6x3m	I have am preparing a small sample for you guys
12:52	TEttinger	(identity Bronsa)
12:52	lazybot	Bronsa has karma 82.
12:53	mi6x3m	basically my extra constructor argument is being seen in the init function
12:53	mi6x3m	but the state is null in an overriden method
12:54	Bronsa	TEttinger I have actually used gen-class only once in my life :P
12:54	TEttinger	heh, lucky
12:54	Bronsa	(in great pain and agony)
12:55	mi6x3m	yes
12:55	mi6x3m	it is great pain and agony
12:55	mi6x3m	but I will be greatful for any hint :)
12:55	TEttinger	I've never used the state stuff
12:55	Bronsa	I have -- https://github.com/clojure/tools.reader/blob/master/src/main/clojure/clojure/tools/reader/impl/ExceptionInfo.clj
13:00	mi6x3m	ok everyone, here goes nothing: http://pastebin.com/VnY1huEX
13:00	mi6x3m	in the -init method, everything is fine and the factory is != nil
13:00	mi6x3m	in the overriden method however, it is nil
13:01	mi6x3m	it's probably something with the vector I return in init
13:03	noonian	i've no experience with gen-class, but why are your funciton names prefixed with '-'? it seems weird because in the gen-class form you reference them without the '-'s
13:03	Bronsa	noonian: no, that's the default prefix for gen-class
13:03	noonian	ah cool
13:05	charlespwd	Should lein ring uberwar take 15 minutes+?
13:05	kenrestivo	on a 1ghz atom maybe
13:05	mi6x3m	charlespwd: depends on your internet connection and the number of dependencies
13:06	[blake\|	Hey, all: If I have a web app packaged as a WAR, how would I handle uploads? To wit, if this is the sort of thing where I'd normally put files in (say) an "/upload" directory off the root?
13:06	charlespwd	mi6x3m: thanks.
13:07	[blake\|	charlespwd: Every now and again, mine takes an inordinate amount of time. I can't really explain it, since everything should already be downloaded.
13:07	TEttinger	decoratorFactory and decorator-factory shouldn't be... it seems like those are different symbols
13:07	Bronsa	TEttinger I don't think that matters at all
13:07	mi6x3m	TEttinger: please explain?
13:07	mi6x3m	the one is a java class field, the other a clojure arg
13:07	kenrestivo	[blake\|: i usually use s3 in those cases
13:08	TEttinger	I just thought it might be a typo, I don't know how state works here
13:08	Bronsa	mi6x3m: are you sure you don't have stale classes in your classpath?
13:08	TEttinger	lein clean to the rescue
13:08	mi6x3m	Bronsa: what do you mean?
13:08	[blake\|	kenrestivo: OK, I think my WAR is actually going to be on S3.
13:10	mi6x3m	Bronsa: i have a file extract-native.dependencies in my stale folder in target
13:11	mi6x3m	perhaps it's a garbage collection issue?
13:12	TEttinger	mi6x3m, stale as in from an older compilation of your program
13:13	TEttinger	but not cleaned by lein clean or something that calls lein clean, so your program still sees old non-working class files
13:13	mi6x3m	TEttinger: I am sure, deleted the whole target directory
13:13	TEttinger	ok
13:15	mi6x3m	Bronsa: there is one thing which bothers me
13:16	mi6x3m	the superclass takes a variadic argument list
13:16	mi6x3m	that "options"
13:16	mi6x3m	might be breaking things
13:16	TimMc	As long as you treat that as an array of the appropriate type, that should be fine.
13:16	Bronsa	mi6x3m: I don't think so, you provide an array type, that's how varargs are compiled to
13:17	mi6x3m	than I am sure out of theories :/
13:17	Bronsa	mi6x3m: I'm more concerned about the exposes-method thing, are you sure that's correct?
13:17	mi6x3m	Bronsa: well the method is invoked by the Java code
13:18	mi6x3m	so it must be correctly overriden I think
13:18	TimMc	What is evidence that your state is non-nil in init and nil in the method?
13:19	mi6x3m	TimMc: println
13:24	mi6x3m	where can one see the code of gen class?
13:25	TimMc	The source for clojure.core/gen-class?
13:26	aperiodic	mi6x3m: I'd try to reproduce the behavior you're seeing in a minimal example w/out other dependencies
13:26	aperiodic	also gen-class is implemented here: https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/Compiler.java#L7218
13:26	aperiodic	good luck
13:27	aperiodic	oh, no, it's not
13:29	aperiodic	this is the meat of it, sorry: https://github.com/clojure/clojure/blob/ae5e679111b3b72e2a8e3d2ebb1439ff0ca695a7/src/clj/clojure/genclass.clj#L124
13:29	aperiodic	it's only 382 lines long
13:30	mi6x3m	jesus christ
13:30	mi6x3m	longest let i've seen so far
13:34	aperiodic	anyways, if you have a minimal reproduction it will be easier for others to help you debug, and you may figure out the problem in the course of constructing the minimal reproduction
13:34	aperiodic	it will probably be more productive than trying to understand the implementation
13:35	adu	aperiodic: good ol' min.rep.
13:38	TimMc	~sscce
13:38	clojurebot	An SSCCE is a Short, Self-Contained, Correct Example <http://sscce.org/>
13:38	TimMc	aperiodic: I bet that would be the case here (discovering the bug while making an sscce).
13:39	TimMc	aperiodic: Sometimes I ponder making a code bisector that keeps halving your code until the bug is discovered.
13:39	mi6x3m-alt	running the .class file through a decompiler I get: decorator_factory = null;tmp52_36[1] = decorator_factory;return RT.vector(tmp52_36);
13:40	mi6x3m-alt	which is quite disturbing
13:40	Yxven1	How difficult is it to learn clojure if you know java and haskell?
13:41	mi6x3m-alt	Yxven1: not hard
13:41	aperiodic	TimMc: how do you remove code without changing the behavior in a way that might obscure the bug?
13:41	TimMc	Dunno.
13:41	Yxven1	It took around 4 months to get proficient at haskell with no previous haskell experience. Would I be looking at the same for clojure mi6x3m-alt?
13:42	TimMc	It would be a neat trick for sure.
13:42	mi6x3m-alt	Yxven1: I'd say 2 months here
13:42	mi6x3m-alt	it's a lisp with a lot of JVM mojo
13:42	andyf	I'd say the familiarity with immutable data you got from Haskell will get you a lot of the way there.
13:43	aperiodic	Yxven1: java -> haskell seems like a much bigger paradigm shift than haskell -> clojure. you're already familiary w/immutability & laziness. probably mostly syntax and familiarity with the standard library and idioms that you're missing.
13:44	Yxven1	Would SICP teach me how to write clojure or is scheme very different?
13:45	rgiar	IMO, SICP is great for the lisp aspects of clojure
13:45	mi6x3m-alt	Yxven1: well, I'd take one of the clojure specific books and work my way through the first 200 pages, clojure is not tht difficult really
13:45	AimHere	SICP will teach you programming.
13:45	andyf	Scheme emphasizes lists, whereas typical Clojure code uses vectors, maps, sets, and lists, perhaps even with lists being in the minority.
13:45	rgiar	the tricky parts of thinking in terms of immutability aren't covered
13:45	AimHere	SICP only teaches the basics of scheme anyways
13:46	rgiar	basics of scheme but the deep parts of lisp
13:46	andyf	SICP is a great book, no question, but it won't necessarily make the same kinds of data structure choices that Clojure code would.
13:46	AimHere	rgiar, well SICP teaches immutability by default. It takes about 160 pages before any variable's value is reassigned, and they make a big deal about it
13:46	Bronsa	(inc andyf) ;; thanks for the help on tanal-108
13:46	lazybot	⇒ 20
13:46	andyf	(inc Bronsa)
13:46	lazybot	⇒ 83
13:46	rgiar	hmm, i didn't notice it at the time -- they do say very bad things about setcar/setcdr so i guess you're right
13:47	andyf	Thanks for fixing it :)
13:48	Yxven1	I appreciate the advice guys
13:49	AimHere	Anyways, read SICP, even if you can't do the translation and have to do it in scheme!
13:51	TimMc	mi6x3m-alt: A reduced test-case I made does not exhibit the behavior you see.
13:52	mi6x3m-alt	TimMc: can you paste it?
13:53	llasram	mi6x3m-alt: A bit late, but IMHO if you are unable to use reify or even proxy, it is far far simpler to just write a small Java class which can be parameterized with an IFn than to use gen-class
13:53	llasram	Java (<8) may not be a great programming language, but it's a pretty decent DSL for defining Java classes
13:53	nullptr	ha!
13:53	TimMc	(inc llasram)
13:53	lazybot	⇒ 44
13:54	mi6x3m-alt	(inc llasram)
13:54	lazybot	⇒ 45
13:54	mi6x3m-alt	(inc llasram)
13:54	lazybot	⇒ 46
13:54	crash_ep	GO BLOCKS
13:54	mi6x3m-alt	I don't know how I wasted a whole day without considering the obvious way
13:54	TimMc	mi6x3m-alt: https://www.refheap.com/95599 I had to strip out some things that might be relevant because they got in my way.
13:54	justin_smith	crash_ep: do they interest you, or are you rooting for your favorite lego themed team?
13:54	TimMc	So it's stripped too far, I guess.
13:55	mi6x3m-alt	TimMc: Object doesn't have a ctor with variadic args :)
13:55	crash_ep	justin_smith: heh
13:55	mi6x3m-alt	anyhow, llasram is fully right, this is non-sense, java is for writing java classes
14:13	clojer	Does Clojurescript eliminate the need for tools such as gulp/grunt and AMD/CommonJS?
14:15	noonian	definitely for AMD/CommonJS since all the modules are loaded and built into a single file at compile time
14:15	noonian	and uses google closure
14:15	noonian	's module system
14:16	clojer	noonian: I'm just findig the whole JS build tools maze exhausting :(
14:18	mi6x3m-alt	llasram: do you happen to know, my saviour, how to compile java code with lein?
14:18	noonian	clojer: well, with cljs you'll be swapping the js build tools for clojure's build tools; most likely leiningen and lein-cljsbuild
14:18	mi6x3m-alt	I guess I have to modify the task
14:18	craigglennie	Is it okay stylistically to have a “for” in a let block?
14:19	SagiCZ1	how to add an element at the beginning of a vector?
14:19	SagiCZ1	,(into [1] [2 3])
14:19	TimMc	craigglennie: Sure, why not?
14:19	clojurebot	[1 2 3]
14:19	noonian	mi6x3m-alt: i think you just need to add a :java-source-paths entry to your project.clj
14:19	craigglennie	TimMc: I couldn’t think of any reason why not, just wondered if it was idiomatic… it certainly works :)
14:19	SagiCZ1	(apply vector 1 [2 3])
14:19	SagiCZ1	, (apply vector 1 [2 3])
14:19	clojurebot	[1 2 3]
14:19	mi6x3m-alt	noonian: I did, no effect
14:19	TimMc	craigglennie: Especially since a :let clause at the beginnning of a for expr is buggy and doesn't work. :-P
14:19	justin_smith	SagiCZ1: I think into is pretty much your best bet there
14:19	craigglennie	TimMc: It is?
14:19	SagiCZ1	justin_smith: okay thanks
14:20	TimMc	Last I saw.
14:20	coventry	Does anyone have a link to that talk where a leading scala developer flips out about the technical debt in the scala source code?
14:20	TimMc	,(for [:let [a 5], i (range a)] i)
14:20	clojurebot	#<IllegalStateException java.lang.IllegalStateException: Can't pop empty vector>
14:21	noonian	coventry: I think paul phillips is the guy your thinking of; shouldn't be too hard to find it (i think he has a few of them)
14:21	TimMc	,(for [i (range 5), :let [a i]] a)
14:21	clojurebot	(0 1 2 3 4)
14:22	TimMc	craigglennie: So if you need to bind something for the entire scope of the for expression, that's really your only option. (And yes, it's idiomatic too.)
14:22	coventry	noonian: Thanks.
14:22	coventry
14:22	noonian	either "Scala Collections: Why Not?" or "We're Doing it All Wrong"
14:22	craigglennie	TimMc: Cool, thanks
14:25	coventry	Yes, "we're doing it all wrong" is the one.
14:26	godd2	&(into [] (cons 4 [1 2]))
14:26	lazybot	⇒ [4 1 2]
14:26	godd2	SagiCZ1 is that what you wanted?
14:26	justin_smith	godd2: that's bad
14:27	godd2	justin_smith bad how? slow? unidiomatic?
14:27	justin_smith	godd2: that turns the whole vector into a list, and then turns it back into a vector again
14:27	justin_smith	which is silly
14:27	tbaldridge	coventry: pretty much every talk by that same guy these days is him flipping out
14:27	justin_smith	(into [4] [1 2]) does a lot less needless work
14:28	godd2	justin_smith yea but the into isn't prepending 4 into [1 2]
14:28	mi6x3m-alt	OK following situation
14:28	mi6x3m-alt	using java_source_paths works for compiling the file
14:28	mi6x3m-alt	but the file is not being seen by lein run
14:28	Bronsa	,(into [4] [1 2])
14:28	clojurebot	[4 1 2]
14:28	justin_smith	godd2: right, because you cannot prepend vectors period, but it is the best workaround
14:28	Bronsa	godd2: yes it is
14:28	mi6x3m-alt	I get a classnotfoundexception
14:28	godd2	Bronsa no, it's iteratively appending the elements of [1 2] into [4]
14:29	Bronsa	godd2: and the difference is?
14:30	godd2	[4] is not the same as 4
14:30	justin_smith	godd2: Bronsa: SagiCZ1: the right answer is to use the data structure that can be extended simply and naturally in the direction you need. If you only add on the front use a list, if you need to put things onto both ends use some sort of deque
14:30	tbaldridge	godd2: the point is, that (into [] (cons x [1 2])) is worse than (into [x] [1 2])
14:31	tbaldridge	the cons is completely useless
14:31	godd2	tbaldridge it's doing a prepend which is what was asked for
14:31	gfredericks	~the cons is completely useless
14:31	clojurebot	You don't have to tell me twice.
14:31	Bronsa	godd2: I really don't see your point. (defn foo [x y] (into [x] y)) and you can write (foo 4 [1 2]). who cares how it's implemented? your version does two useless conversions
14:32	tbaldridge	godd2: nope, he said "how to add an element at the beginning of a vector?"
14:32	godd2	Bronsa I didn't say I had a point, you claimed they weren't different.
14:32	SagiCZ1	justin_smith: my vector represents an actual geometric vector and i need to at one place once prepend one to it to increase its dimension.. i dont think i should choose a different data structure just because of that
14:32	Bronsa	whatever.
14:32	godd2	tbaldridge and an element is not the same as a vector containing that element
14:33	llasram	,(= (into [4] [1 2]) (into [] (cons 4 [1 2])) [4 1 2])
14:33	clojurebot	true
14:33	tbaldridge	true enough
14:33	llasram	Thanks, clojurebot
14:33	godd2	,(= 4 [4])
14:33	clojurebot	false
14:33	godd2	oh no!
14:34	tbaldridge	so all things considered, SagiCZ1, I would recommend (apply vector x [1 2]) That's most likely going to be the fastest option
14:34	llasram	plonk
14:34	SagiCZ1	tbaldridge: really?
14:34	tbaldridge	everything else is going to create extra garbage
14:34	Bronsa	tbaldridge: I would expect into [] to be faster than apply vector TBH
14:35	tbaldridge	Interesting....
14:35	justin_smith	lein do clean, check, eastwood, test
14:35	SagiCZ1	apply vector is almost 3 times faster than into []
14:35	justin_smith	I think I need an alias
14:35	Bronsa	uh, really?
14:35	llasram	mi6x3m-alt: Oh, hey, missed earlier q -- there's a builtin `javac` task
14:35	SagiCZ1	,(time (dotimes [_ 5000000] (doall (into [5] [1 2]))))
14:35	tbaldridge	Well (into [x] (cons x [1 2])) is completely out, as that both converts to a seq and allocates a cons cell
14:36	mi6x3m-alt	llasram: yeah, the class is generated but I get a ClassNotFoundException
14:36	clojurebot	eval service is offline
14:36	justin_smith	SagiCZ1: how would a clojure vector be more suited for a mathematical vector than a deque would be? just because of the name?
14:36	llasram	mi6x3m-alt: When doing the compile or when trying to load the compiled class?
14:36	mi6x3m-alt	llasram: loading
14:36	tbaldridge	But apply would also convert to a seq, so you may be right Bronsa
14:37	SagiCZ1	justin_smith: havent thought about that honestly, all i know is that when using clojure vector in incanters mathematical matrix operation, it automatically converts it into matrix object correctly
14:37	mi6x3m-alt	llasram: found it, it was a "-" vs "_" issue
14:37	llasram	ah, cool
14:37	Bronsa	tbaldridge: it looks like apply vector is faster for small vectors, but into is faster for bigger ones
14:37	devn	Hmmm, anyone know if anyone has ever discussed passing an assertion message in a :pre or :post condition? Right now it just calls (fn* [c] `(assert ~c))
14:37	devn	I'm looking at you tbaldridge. You think I could sneak that into core? :D
14:37	justin_smith	SagiCZ1: interesting, I would hope that it is using the interfaces and not coding explicitly against the Class, which would mean a deque would work just as nicely
14:37	justin_smith	SagiCZ1: but I don't know incanter so I can't say whether it does
14:38	Bronsa	tbaldridge: not sure if any of this will change with the work for 1.7 though.
14:38	SagiCZ1	list works the same
14:38	SagiCZ1	idk what deque is or how to make one
14:39	justin_smith	if both vector and list work, deque will. https://github.com/pjstadig/deque-clojure
14:40	SagiCZ1	,(conj '(4 5) 1)
14:40	clojurebot	(1 4 5)
14:40	justin_smith	a deque is a sequence where insertion and removal from both start and end are efficient
14:40	SagiCZ1	cant i use list?
14:40	justin_smith	I think I mentioned, if you only insert at the beginning, use list, if you only insert at end, use vector, and if you use both use deque
14:40	godd2	SagiCZ1 if you only use list, you cant append efficiently
14:41	SagiCZ1	ok thank you all.. list is sufficient then
14:41	gfredericks	justin_smith: "use deque"?
14:42	godd2	SagiCZ1 it may be a good idea to reverse the meaning of the elements in your list to "convert" it into a vector for design purposes
14:42	aperiodic	though lists are terrible for caches so they can be slower even if they're less work to update
14:42	aperiodic	profile, profile, profile
14:42	SagiCZ1	godd2: i am definitely not reversing anything.. debugging nightmare
14:42	aperiodic	and don't prematurely optimize
14:43	justin_smith	gfredericks: I meant, if you insert or remove at both ends, use a deque
14:43	gfredericks	justin_smith: where would I find one though?
14:43	[blake\|	deque-clojure?
14:44	justin_smith	gfredericks: see my link above to deque-clojure, I think that's a good one
14:44	justin_smith	aperiodic: vectors are just as bad for caches as lists in Clojure, and any array that is not a primitive array is nearly as bad, if not as bad as a list
14:44	justin_smith	(on the jvm)
14:45	justin_smith	aperiodic: the jvm isn't very good at the whole "contiguous linear arrangement of data" thing in general
14:46	aperiodic	ah, yeah, chasing pointers is pretty unavoidable on the JVM, ain't it
14:47	stuartsierra	Until we get Value Objects in Java 9 or 10.
14:48	justin_smith	or you could use some wacky ztellman lib, everyone will think you are crazy but your code will be more cache-line friendly
14:48	[blake\|	Wow, that Scala talk is =scathing=.
14:49	justin_smith	[blake\|: I had to stop watching because I don't like indulging in schadenfreude and was never a scala fan.
14:49	godd2	[blake\| link?
14:49	justin_smith	(what I was referring to as a "wacky ztellman lib" above: https://github.com/ztellman/vertigo )
14:50	[blake\|	justin_smith: Heh. I have no strong feelings about Scala. Well, I didn't. Now I'm thinking it's the '71 Pinto.
14:50	andyf	justin_smith: I don't understand why you would say that vectors are just as bad as lists. Lists require 2 sequential pointer dereferences for each element, whereas vectors cut it down to about (1+1/32) on average, yes?
14:50	[blake\|	godd2: https://www.youtube.com/watch?v=TS1lpKBMkgg
14:50	dnolen_	justin_smith: vectors would be a lot slower if what you said was true
14:51	justin_smith	andyf: but they can't hold primitives, so you still need to chase down the actual Object. So yeah, closer to an array, but still not linear.
14:51	godd2	[blake\| thank you
14:51	justin_smith	dnolen_: OK, I should have been a bit more careful in my wording, yes
14:51	tbaldridge	<rant> I found it funny that half the issues mentioned in that scala talk exist due to static typing </rant>
14:52	tbaldridge	or improper mapping of common collection operations to static types
14:52	justin_smith	tbaldridge: can you elaborate on the latter?
14:53	[blake\|	tbaldridge: Heh. Check out the TypeScript spec some time.
14:54	tbaldridge	Not much to elaborate on, except that I don't think Haskell suffers from these same collection issues (I could be wrong, I don't know Haskell).
14:54	andyf	tbaldridge: seems like the other half are about issues with mutability
14:55	tbaldridge	yeah, that too
14:55	tbaldridge	Who on earth unifies a mutable and immutable API?
14:55	stuartsierra	As I recall, a big part of the problem is trying to capture both mutable and immutable collections in a common type hierarchy.
14:55	[blake\|	andyf: Yeah, I'm struggling to understand how you combine immutability with object hierarchies.
14:57	tbaldridge	I just remember seeing the "this is how map is defined" and thinking that it was quite ugly compared to the F# version: http://msdn.microsoft.com/en-us/library/vstudio/bb548891(v=vs.100).aspx?cs-save-lang=1&cs-lang=fsharp#code-snippet-1
14:58	romain_	dnolen_: saw your message on twitter about clojurescript low-hanging fruit. Would you be willing to coach a newcomer on working on a CLJS issue, e.g. CLJS-931?
15:02	dnolen_	romain_: sure thing, that is fairly straightforward ticket. We just to need to extend the first comment line to include build options
15:03	dnolen_	romain_: so something like // Compiled by ClojureScript 0.0-2511 : #{:static-fns, :elide-asserts}
15:04	dnolen_	romain_: currently only emitting // Compiled by ClojureScript 0.0-2511
15:04	romain_	dnolen_: OK, actually I tried doing this on a second line
15:04	dnolen_	romain_: lets just keep it on the same line, then we need to helpers in cljs.util for extract this EDN set
15:04	romain_	The thing is, I don't know how to test my patch, I am a bit at a loss with the scripts dir.
15:05	dnolen_	romain_: there's a test directory with compiler and analyzer tests
15:05	dnolen_	romain_: you could make a test .cljs file, compile it, change the settings, compile it again and the modified time should be different
15:05	dnolen_	romain_: one test should not change the setting and the modified time should be the same
15:06	dnolen_	romain_: you can run all tests with `lein test`
15:06	romain_	dnolen_: also, should it output all build options or just the ones that may affect compilation results?
15:07	dnolen_	romain_: only the ones that affect, they are listed on the ticket, there's only 3 for now
15:07	romain_	dnolen_: OK, will try; then submit on JIRA?
15:08	dnolen_	romain_: yes attach a patch to JIRA, make sure to send in your CA
15:08	dnolen_	romain_: http://clojure.org/contributing
15:08	romain_	dnolen_: great
15:16	[blake\|	Any pointers for deploying a Clojure WAR to Amazon? Blog post, book, video, whatever?
15:17	justin_smith	[blake\|: by the time it's a war, it's just drop-in, identical to deploying a java war
15:17	justin_smith	it's really not even complicated enough to need a book or video
15:17	justin_smith	you tell amazon to deploy your war, and if it's properly packaged, it just works
15:18	[blake\|	justin_smith: Yeah, I figured. I'll go that route.
15:20	justin_smith	[blake\|: that's a big part of why elasticbeanstalk is expensive, once you have a working war, it's pretty simple
15:23	stuartsierra	Elastic Beanstalk only costs what the underlying compute/storage resources cost.
15:35	justin_smith	stuartsierra: oh? I had a lead claim he was switching from beanstalk to ec2 for a cost savings, but maybe there was another factor being left out
15:36	stuartsierra	http://aws.amazon.com/elasticbeanstalk/pricing/
15:36	stuartsierra	Not sure if that was always true.
15:36	justin_smith	oh wow, 100% identical
15:37	justin_smith	so either my lead was misinformed or this is new, clearly, thanks for the correction!
15:37	llasram	I believe you do end up paying for ELB, even for tiny/prototype applications where you don't need it
15:37	stuartsierra	justin_smith: I vaguely recall that there was a small add-on charge for Elastic Beanstalk at some point in the past.
15:40	joobus	i recall beanstalk being more expensive than ec2 last time i looked into it also.
15:40	[blake\|	I was also under that impression.
15:41	justin_smith	it's cool to find out it has ec2 pricing now
15:43	romain_	dnolen_: if I invoke "./scripts/repl" I should be able to (cljs.compiler/compile-file f) right? Right now I just get a NPE from "deref-future"...
15:47	dnolen_	romain_: yes because you need to establish a compiler environment
15:48	visof	hi guys
15:48	visof	is there anybody using aleph?
15:48	ticking_	visof: yeah
15:49	visof	how can i send data to tcp connection?
15:49	visof	(aleph.http/tcp-client {:host "example.com", :port 10001})
15:49	visof	ticking_: how can i send data to this connection
15:49	romain_	dnolen_: ah OK, thanks
15:50	dnolen_	romain_: look at the analyzer tests for examples
15:51	ticking_	visof: from the other side of a tcp connection
15:51	ticking_	visof: it'sbeen a while since I wrote the cod eusing aleph let me check a sec
15:51	visof	ticking_: i'm waiting thanks
15:51	TimMc	netcat? :-)
15:52	ticking_	visof: aleph does not work on its own you also need lamina which handels the channel manipulation
15:52	atratus	@dnolen im trying to setup node repl on windows, self-compile fails, unable to find main class clojure.main
15:52	atratus	tried repl.bat too, same
15:52	ticking_	aleph is build on top of lamina which provides channels, and provides different network connections on top of that
15:53	ticking_	visof: you want lamina.core/enqueue
15:54	visof	ticking_: i guess doing this using java.io.Socket is more simpler
15:54	visof	ticking_: have you tried using java.io.Socket?
15:55	ticking_	visof: not nessecarily
15:56	ticking_	visof: yeah, but aleph really shines when using it together with gloss
15:56	visof	ticking_: i just want to send data to socket even without waiting to recieve it
15:57	visof	so future + sending to socket are going to be fast enough
15:57	ticking_	ztellmans binary parsing dsl
15:57	ticking_	makes manipulating bytestreams as pleasant as in erlang
15:57	ticking_	visof: gloss can encode and decode
15:57	ticking_	visof: its not about speed but remaining sane when dealing with complex byte formats
15:57	ticking_	which a tcp connection almost always requires
15:57	visof	.getbytes is enough?
15:58	ticking_	hm?
15:58	llasram	visof: This is just a for-fun project, messing around with sending data over TCP, yes?
15:58	visof	llasram: what do you mean?
15:58	llasram	Oh, nm, you brought up aleph
15:58	llasram	I was trying to better-understand what you're trying to do
15:58	visof	clojure docs is down
15:59	visof	is there another way to check clojure docs
15:59	visof	i want to read about reader/writer
15:59	llasram	If you're trying to learn how to do lower-level network programming (at least so far as the JVM allows), then aleph is not going to be helpful :-)
15:59	visof	why always clojuredocs is down
15:59	andyf	visof: Try conj.io
16:00	andyf	but clojuredocs.org is up
16:00	romain_	dnolen_: so something like (e/with-compiler-env (e/default-compiler-env) (c/compile-file "hello.cljs"))
16:01	dnolen_	romain_: yep
16:02	visof	andyf: https://clojuredocs.org/clojure.java.io/reader
16:02	andyf	visof: That link works fine for me. You aren't getting anything?
16:03	visof	yeah
16:03	visof	andyf: what browser you are using?
16:03	visof	andyf: i got this http://sprunge.us/XBAG
16:04	andyf	firefox. Also tried Safari with no trouble.
16:04	visof	chrome complain
16:04	visof	guys can any chrome users test this?
16:04	llasram	works fine for me
16:04	tephra	fine for me
16:04	visof	god so what is the problem
16:04	andyf	web proxy between you and there, maybe?
16:05	visof	andyf: every website works for me fine
16:05	atratus	Error code: ERR_SSL_VERSION_OR_CIPHER_MISMATCH
16:06	tephra	visof: are you on XP?
16:06	andyf	perhaps Chrome is more strict in what versions of SSL it allows, to avoid a bug in an older SSL version?
16:08	visof	tephra: i'm using fedora
16:08	visof	andyf: maybe
16:08	visof	i'll try in firefox
16:08	tephra	visof: hmm me to, chrome 40.0
16:08	andyf	freshly installed Google Chrome on Mac OS X 10.9.5 works for that clojuredocs.org location
16:09	visof	firefox complain with this http://sprunge.us/LUIS
16:10	andyf	what country are you in? :)
16:10	visof	andyf: Egypt
16:10	andyf	blocking/intercepting SSL?
16:10	visof	andyf: i don't know
16:12	andyf	visof: Maybe some help here: http://forums.mozillazine.org/viewtopic.php?f=38&t=2301041
16:13	andyf	I don't have detailed knowledge here -- just did a search on a keyword in the error message.
16:14	EvanR-work	is there an idiomatic "either" data type
16:14	EvanR-work	[:left 3] [:right 3]
16:14	amalloy	EvanR-work: not really
16:14	ticking_	weird when I use the chestnut browser repl to manually transact! on an om cursor, the render loop assertion "Cannot manipulate cursor outside of render phase" will fail, yet the transaction will succeed
16:19	dnolen_	ticking_: that stuff is gone from 0.8.0-betas
16:19	dnolen_	the checks
16:19	ticking_	dnolen_: ah thanks :)
16:20	llasram	EvanR-work: Using a vector like that is the closest you get. There was even a talk at the Conj this year advocating it :-)
16:20	EvanR-work	heh
16:20	EvanR-work	i decided against it
16:20	llasram	EvanR-work: Well, in case you change your mind https://www.youtube.com/watch?v=ZQkIWWTygio
16:21	EvanR-work	i did {:left foo} {:right bar} instead, so you cant accidentally ignore the tag
16:22	ticking_	dnolen_: btw, something I never quite got, literals passed to om/root will also be wrapped into a cursor right?
16:22	dnolen_	ticking_: no
16:23	ticking_	dnolen_: really? hm weird transact! seems to work even though I passed in a literal
16:23	augustl	the function > seems to want to convert things to numbers, it doesn't use comparable. How do I compare two comparables in clojure?
16:23	augustl	I happen to be using Joda DateTime instances
16:24	Mosterd	Which ide to use if you are a vim refugee who doesn't understand emacs? Is there a nice editor such as Spyder or python-notebook which I both like to recommend to python users who don't understand vim?
16:24	hyPiRion	hrm, compare?
16:24	hyPiRion	,(compare [1 2] [1 3])
16:24	clojurebot	-1
16:24	romain_	dnolen_: the build options are passed as 'opts' to compile-file right? Or should I also look at the compiler environment...?
16:25	llasram	,(compare [1 2] [3])
16:25	clojurebot	1
16:25	atratus_	mosterd: light table integrates ipython pretty well
16:25	atratus_	dead simple
16:25	llasram	I do think at times that `compare<`, `compare>` etc would be nice
16:26	dnolen_	romain_: opts is the right thing
16:26	augustl	llasram: yeah that would have been nice :)
16:26	scottj	Mosterd: cursive for intellij or gorilla repl maybe
16:26	Mosterd	atratus_, wait that's even written in clojure, that might be great
16:26	hyPiRion	llasram: me too, esp. when working with max-key and min-key
16:26	kenrestivo	so just confirming, async/go-loop will spin of a jvm thread on a jvm, correct?
16:26	romain_	dnolen_: great, so I have a patch but no tests yet. Any ideas or where to put those? And how to design them?
16:27	stuartsierra	Mosterd: perhaps one of Cursive (IntelliJ), Nightcode, Light Table
16:27	atratus_	mosterd: clojurescript but yeah it handles clojure ootb
16:28	atratus_	it handles ipython just as it does the clojure 'instarepl', with inline graphs and all that
16:28	llasram	hyPiRion, augustl: Sounds like a job for a new tiny library!
16:29	andyf	augustl: (< (compare a b) 0) instead of (< a b), for example. Use <=, >= , or > instead of < as desired.
16:29	Mosterd	It's a desktop program written in javascript?
16:29	atratus_	yep
16:30	hyPiRion	llasram: I'll delegate that work to you
16:30	Mosterd	Hmm, I must have lived under a rock for a while
16:30	augustl	as if date comparisons wasn't hard enough to read as it is :)
16:30	hyPiRion	Although to be fair, it seems to be very little work for rather nice functionality (when you need it).
16:31	atratus_	it uses node webkit & codemirror
16:31	ticking_	dnolen_: yeah they do :P (if (satisfies? IAtom value) value (atom value))
16:31	atratus_	scripted with cljs
16:32	llasram	,(let [comparize #(%1 (compare %2 %3) 0)] (map (partial comparize < [1 2]) [[1] [1 2] [1 2 3]]))
16:32	clojurebot	(false false true)
16:32	dnolen_	ticking_: that's root, values are not wrapped in cursorss
16:32	dnolen_	ticking_: yes we always wrap the root, but components can take regular values
16:32	ticking_	dnolen_: ah sorry miscommunication then
16:32	dnolen_	they don't need to be cursors
16:33	ticking_	dnolen_: what I meant was when they get wrapped into an atom anyways and thus turned into a cursor, why have atoms in the first place? Changes to the atom won't be send to tx-listen and cause global rerendering which means one should never manipulate the atom anyways
16:33	dnolen_	romain_: put them in tests - make a test dummy .cljs file you check in that the tests run against, the tests can write to a temp directory and check last modified
16:34	dnolen_	ticking_: there are reason to change the atom directly that don't have anything to do w/ components - history stuff etc.
16:35	ticking_	dnolen_: why not expose the cursor directly (def app-state (cursor foo)) this way it is accessible for transact! calls without having to pull it out of a component call
16:35	justin_smith	Mosterd: vim refugee? if you want to still use vim, why not fireplace?
16:36	dnolen_	ticking_: because cursors aren't atoms - I continue to be skeptical
16:36	dnolen_	ticking_: anyways I would use Om on something non-trivial before thinking too much about how to do it differently
16:37	dnolen_	"skeptical that they should act and look like atoms, they hold atoms"
16:37	ticking_	dnolen_: I was just wondering for the reason, because I found myself never accessing the atom directly because it is so incompatible with many om features
16:38	dnolen_	ticking_: changing the app state globally
16:38	ticking_	dnolen_: it should fire a global tx-listen then though :D
16:39	dnolen_	ticking_: there's problems with :tx-listen, likely it will work differently in the future
16:39	mi6x3m-alt	llasram: everything works perfectly, thanks for showing me the one true path =)
16:40	llasram	mi6x3m-alt: np! I keep meaning to write a blog post about it...
16:40	llasram	So much time, so little to do
16:40	mi6x3m-alt	well it's so simple it's remarkable
16:40	mi6x3m-alt	never use gen-class :D
16:40	llasram	heh
16:40	mi6x3m-alt	when you need a java class
16:40	mi6x3m-alt	it will end up in one of these ancient chinese booklets of wisdom, I tell you
16:41	mi6x3m-alt	"best DSL for java code is java"
16:41	llasram	I did a short talk for the Atlanta Clojure meetup which included pretty much that -- bullet points of: "reify: when you need this", "proxy: when you need that", "gen-class: NEVAR"
16:41	xemdetia	was that the whole talk?
16:41	Mosterd	justin_smith, perhaps, but I don't know. For some reason I prefer the repl to be in a different window.
16:42	xemdetia	then copious applause?
16:42	gfredericks	llasram: what about for a simple -main? use java instead?
16:42	gfredericks	or some plugin that does that
16:42	mi6x3m-alt	well gfredericks -main is really the only exception
16:42	mi6x3m-alt	where this madness actually makes sense
16:42	gfredericks	oh so NEVAR-except
16:43	llasram	gfredericks: that might be the exception, but I've found it very rare that I can make do with just an executable JAR that I don't even use it for that myself
16:43	mi6x3m-alt	well my math prof. defined infinity as "all cases except for finitely many"
16:43	ticking_	dnolen_: I'm intrigued, yet a bit scared as a lot of code I just wrote depends on tx-listen ;)
16:43	mi6x3m-alt	this includes the exceptions
16:43	llasram	mi6x3m-alt: nice
16:43	borkdude	in clojure when I use a library that exposes a BufferedImage, do I need to import this class to be able to work with it?
16:43	gfredericks	mi6x3m-alt: I think that's "almost all"
16:44	dnolen_	ticking_: any changes will be delayed until till 0.9.0 and there will be some sort of upgrade path
16:44	clojurebot	excusez-moi
16:44	Mosterd	justin_smith, I have used tmux before but then I still miss features such as better autocompletion and identation and such, so that's why I'm looking at different editors
16:44	mi6x3m-alt	gfredericks: well now, I do think we both understand what llasram is saying ;)
16:45	llasram	xemdetia: Well, there was a bit more :-) -- I actually still have the slides up http://static.platypope.org/interop/#/
16:45	bacon1989	tmux is an editor now?
16:46	gfredericks	mi6x3m-alt: yes but I'm physically incapable of not being pendantic about infinity
16:46	bacon1989	man, it's gotten featureful
16:46	llasram	Oops meant http://static.platypope.org/interop/#/17 in particular
16:46	mi6x3m-alt	gfredericks: professional condition? :)
16:47	xemdetia	that is a very pretty slide deck
16:47	llasram	xemdetia: It's just a default theme of <digging for link> I can take 0 credit
16:48	Mosterd	bacon1989, nope, but there is a vim plugin that can send code that has been selected in vim to tmux which works if you manually started a lein repl in that tmux session
16:49	llasram	xemdetia: Ah, Reveal.js: http://lab.hakim.se/reveal-js/#/
16:49	xemdetia	v. cool regardless :)
16:51	borkdude	I get an exception Unable to resolve classname: BufferedImage, compiling:(recipes/controllers.clj:14:41) on this line: resized (imagez/resize img (min (.getWidth img) 1024)), imagez is the core namespace from this library https://github.com/mikera/imagez/blob/develop/src/main/clojure/mikera/image/core.clj
16:51	borkdude	adding (:import [java.awt.image.BufferedImage]) to my ns decl doesn't help
16:52	borkdude	brb
16:52	devn	Asked this earlier, but I'd be curious to know if anyone knows anything before I look into it any further
16:52	devn	has anyone discussed passing an assertion message in a :pre or :post condition? Right now it just calls (fn* [c] `(assert ~c))
16:53	devn	borkdude: that sounds familiar actually
16:56	tephra	visof: did you resolve the issue?
16:56	stuartsierra	devn: I know it's been discussed somewhere, maybe on a mailing list.
16:56	devn	stuartsierra: any idea whether it's out of the question, or if it's worth making a patch for it?
16:56	stuartsierra	devn: I don't know.
16:57	justin_smith	devn: I would use :pre much more if it allowed custom messages
16:57	devn	stuartsierra: fair enough. thanks for the reply either way. i'll try and hunt it down.
16:57	EvanR-work	llasram: well that was refreshing and convinced me to go with my original idea, and somehow to ignore my original worry that someone will just do let [[_ x] foo] and bypass the safety
16:58	EvanR-work	(mainly me)
17:01	andyf	devn: Maybe this discussion: https://groups.google.com/forum/#!searchin/clojure-dev/precondition/clojure-dev/i7pijgFaa0I/MPVOCgeRO4YJ
17:02	SagiCZ1	hi, i need to achieve something like this
17:02	SagiCZ1	,(let [data [:a :b :c]] (for [e data] [e (remove #{e} data)]))
17:02	SagiCZ1	but... not using set
17:02	clojurebot	([:a (:b :c)] [:b (:a :c)] [:c (:a :b)])
17:03	EvanR-work	apply dissoc?
17:03	SagiCZ1	EvanR-work: i would rather just use the index
17:03	SagiCZ1	because set operations need to compare the things but the elements could be very expensive to compare
17:04	devn	andyf: ah, yes
17:04	devn	that's better than what i found. thank you!
17:04	andyf	Th-inc nothing of it :)
17:05	devn	seems like this has been brought up on several occasions
17:05	devn	all of the right people were on these ML discussions
17:05	devn	just looks like nothing ever happened with it
17:07	devn	https://groups.google.com/forum/#!msg/clojure-dev/eNK9UZ5HklI/BDa6CDHenWkJ
17:07	andyf	Preconditions are easy to replace with assert's and custom messages on your own. Postconditions not so much.
17:07	devn	nod, which I've done
17:07	devn	but it felt kind of odd to me
17:07	devn	im not complaining about error messages, to be clear :D
17:08	devn	it would be nice to give myself a nice message in pre/post though
17:08	andyf	A modification of Shantanu's approach looks straightforward to achieve that?
17:08	devn	they feel like a natural place for it, but maybe im overloading them
17:09	devn	agreed, but it also doesn't seem like it'd be that much trouble to work it into fn
17:09	devn	i may be underestimating the work involved, but... it looks like a fair number of people have been interested in this
17:09	borkdude	devn I'm back
17:10	devn	borkdude: i spoke too soon, im not remembering what it was, but did you try (:import (java.awt.image BufferedImage))?
17:10	andyf	Backwards compatibility would be important, I assume. Agreed that coding up a change shouldn't be a lot of work. Go for a ticket, if you feel so moved.
17:11	devn	andyf: yeah of course
17:11	devn	it's smack dab in the middle of fn
17:11	borkdude	devn that was it... syntax
17:12	borkdude	but still I don't get why I need this import
17:15	borkdude	anyway, thanks :)
17:18	devn	yw
17:22	ticking_	SagiCZ1: not pretty but it's what you described plus indexes
17:22	ticking_	,(let [data [:a :b :c] indexed-data (map vector data (range))] (for [[e i] indexed-data] [e (map first (remove (comp #{i} second) indexed-data))]))
17:22	clojurebot	([:a (:b :c)] [:b (:a :c)] [:c (:a :b)])
17:23	ticking_	vectors don't have efficient dissoc afaik so this is a lot harder
17:23	SagiCZ1	i did this in the end
17:23	SagiCZ1	(let [data [:a :b :c]]
17:23	SagiCZ1	(for [[e i] (map list data (range (count data)))]
17:23	SagiCZ1	[e (remove-elem data i)]))
17:24	SagiCZ1	where remove-elem removes the element at index i in vector data
17:24	justin_smith	ticking_: there is no dissoc for vectors
17:24	gagangowda10	I am really new to clojure
17:24	amalloy	SagiCZ1: that sounds pretty expensive. you are iterating over the list a lot of times
17:25	SagiCZ1	amalloy: over the data list? how so?
17:25	gagangowda10	in fact I was going through the website and found this line
17:25	gagangowda10	reactive Agent system that ensure clean, correct, multithreaded designs
17:25	ticking_	justin_smith: yeah, pitty, but I suppose the trie thing doesn't really lend itself to it
17:25	amalloy	i mean, remove-elem walks over the entire list of N elements, and you call it N times
17:25	justin_smith	ticking_: finger-trees do it nicely though
17:25	gagangowda10	I understand the concept of reactive agents, but how is it implemented in clojure, any insight about this?
17:26	SagiCZ1	amalloy: remove-elem concatenates two subvectors .. before and after the remove element
17:26	gagangowda10	like conceptual information on how clojure uses this
17:26	justin_smith	SagiCZ1: this is something that exists?
17:26	SagiCZ1	no
17:26	SagiCZ1	its something that.. hellofunk wrote for me the other day i think
17:27	SagiCZ1	(fn [v i] (vec (concat (subvec v 0 i) (subvec v (inc i)))))
17:28	gagangowda10	nvm got it
17:28	justin_smith	yeah, that walks the whole vector - a finger tree would handle that much better
17:28	justin_smith	gagangowda10: what was the answer?
17:29	justin_smith	"Clojure's Agents are reactive, not autonomous - there is no imperative message loop and no blocking receive. The state of an Agent should be itself immutable (preferably an instance of one of Clojure's persistent collections), and the state of an Agent is always immediately available for reading by any thread (using the deref function or reader macro @) without any messages, i.e. observation does not require cooperation or coordination."
17:29	justin_smith	http://clojure.org/agents
17:29	SagiCZ1	never heard of finger tree.. anyways.. although clojure is very data oriented.. i feel like its very hard to manipulate data in it in some ways i needed lately.. so strange
17:30	justin_smith	SagiCZ1: the function specified above works, it's just that as amalloy notes it is doing more work than would be optimal.
17:31	SagiCZ1	i understand that and i am not going to optimize it, because it works on a very small number of elements.. (dozens at most)
17:31	SagiCZ1	maybe the feeling i have is because i naturally started to avoid manipulating indexes, but sometimes it feels like there is no other way.. for example the thing i needed couple minutes ago
17:33	ticking_	SagiCZ1: whats the data that you have so little of it, yet a comparison operation is too expensive, if I may ask :)?
17:34	SagiCZ1	ticking_: clusters of points.. so i have lets say five clusters.. each with hundreds of thousands points
17:35	ticking_	SagiCZ1: ah yeah point clouds suck
17:36	arohner	I remember someone proposing adding :let [foo bar] to the inside of a cond clause a while back. Did that macro ever get written in a public place?
17:37	jcromartie	error in process sentinel: Could not start nREPL server: /bin/bash: lein: command not found
17:37	jcromartie	but it definitely should be found
17:37	arohner	aha: http://clj-me.cgrand.net/2011/06/17/a-flatter-cond/
17:38	ticking_	jcromartie: needs more input
17:38	jcromartie	I just updated to Yosemite, and cider-jack-in fails with that error
17:38	jcromartie	I've set my exec-path
17:38	ticking_	jcromartie: have you tried reinstalling leiningen?
17:38	jcromartie	to include /usr/local/bin, where lein lives
17:39	jcromartie	I can run lein from the terminal
17:39	jcromartie	no problem
17:39	ticking_	brew install lein
17:39	arohner	jcromartie: are you starting Emacs from the dock?
17:39	nullptr	yeah, your PATH is probably messed up -- they change the way that works every release, seemingly
17:39	nullptr	it's infuriating
17:40	arohner	jcromartie: Emac's path is goofy, because the OSX 'window manager' doesn't use .bashrc, .profile, etc stuff
17:40	nullptr	i've given up and start Emacs exclusively from terminal now
17:40	jcromartie	yeah, I understand that
17:40	ticking_	reinstalling command line utils after os x upgrades can also sometimes do the trick
17:40	jcromartie	but I've explicitly put /usr/local/bin on the Emacs PATH and exec-path
17:40	jcromartie	but yeah
17:41	jcromartie	probably some weird OSXism
17:41	jcromartie	yeah
17:41	jcromartie	I'm reainstalling homebrew right now to start with
17:41	jcromartie	(somewhat unrelated... BTW I had not removed /usr/local/bin before trying cider-jack-in)
17:47	justin_smith	jcromartie: how have you explicitly put those in the Emacs PATH?
17:48	jcromartie	(add-to-list 'exec-path "/usr/local/bin")
17:48	jcromartie	(setenv "PATH" (concat "/usr/local/bin:" (getenv "PATH")))
17:49	jcromartie	derp
17:49	jcromartie	just added that ":" to the (setenv "PATH" ...) and that was it
17:49	justin_smith	that fixed it?
17:49	jcromartie	it wasn't there before
17:49	jcromartie	yeah
17:49	justin_smith	hah, there you go
17:50	jcromartie	I hadn't used (setenv "PATH" ...) at all before Yosemite
17:50	justin_smith	I had never heard of this "exec-path" var, I always used setenv
17:50	jcromartie	but yeah
17:51	jcromartie	every time OS X is updated, the PATH setting method changes :P
17:51	justin_smith	ahh, exec-path is just for subprocesses, I don't know if cider uses the proper "subprocess" infrastructure or not...
17:51	nullptr	i don't believe so -- setting exec-path has not been sufficient in the past
17:52	justin_smith	yet another weird thing about cider I guess
17:53	[blake\|	I've got this uuencoded PNG passed back from the front end of my app and I'd like to save it as a PNG on the server. I was trying to use clojure.data.code.base64, but it wants a byte-array.
17:56	nullptr	(inc jcromartie)
17:56	lazybot	⇒ 8
17:56	justin_smith	[blake\|: and you have what, a string?
17:56	justin_smith	,(.getBytes "hello")
17:56	clojurebot	#<byte[] [B@20b2d772>
17:56	amalloy	uuencoded? i didn't know uuencode was still much used
17:56	[blake\|	justin_smith: Yeah. I can map it to a byte array but...I'm concerned I'm doing something fundamentally wrong.
17:57	[blake\|	amalloy: HTML5's canvas.toDataURL() returns a base64 uuencoded PNG. (I think.)
17:57	justin_smith	[blake\|: .getBytes is O(1) afaik, it is a data cast not a transform iirc
17:57	EvanR-work	i usually use md5 for encoding
17:57	Frozenlock	Interesting... I wasn't aware there were plans to 'replace' cljx https://groups.google.com/forum/#!topic/clojure-dev/6pnIeXFRwnI
17:57	justin_smith	[blake\|: that is not the same as uuencoding
17:57	amalloy	[blake\|: base64 uuencoded sounds bizarre
17:57	amalloy	it's like an english spanish sentence
17:57	justin_smith	yeah, I suspect it is just base64
17:58	amalloy	justin_smith: i would be quite surprised if getBytes were O(1)
17:58	justin_smith	oh? doesn't it just return the underlying bytes of the string?
17:59	amalloy	no. even if you call it with the same character encoding as the string actually uses internally, it copies
17:59	[blake\|	OK, so there's the first problem. I added UUEncode. =P
17:59	justin_smith	aha
17:59	amalloy	because strings are immutable
17:59	amalloy	and you can't just hand out pointers to their internals like candy
17:59	justin_smith	right, and it returns something mutable, of course
17:59	stuartsierra	And Java Strings are UTF-16.
18:00	justin_smith	the world of mutability is so strange to me when I get lost in clojure land...
18:00	stuartsierra	ish
18:00	amalloy	and anyway strings actually store a char[], not a byte[]
18:00	justin_smith	right
18:00	amalloy	[blake\|: yeah, step 1 is to not involve uuencode at all
18:01	justin_smith	[blake\|: you may be able to circumvent your handler and get the bytes from the incoming data directly, but there is always .getBytes as a fallback I guess
18:01	[blake\|	amalloy: OK, since I was using clojure.data.codec.base64, I probably didn't actually put any UUEncode in my code.
18:02	[blake\|	I could write out the file as a text and use base64...but that seems cheesy. Might not work on Amazon, either, come to think of it.
18:06	justin_smith	there is no reason to write it to disk before generating the png
18:07	[blake\|	justin_smith: It's not my preference.
18:10	justin_smith	whatever drawbacks there are to .getBytes on a String (rather than using the bytes you just got over the network), putting the string in a file in order to get the bytes is worse
18:11	[blake\|	I assume I'll be able to work it out without doing that.
18:12	amalloy	it's kinda lame that data.codec requires a byte[]
18:12	jcromartie	[blake\| decoding-transfer
18:12	jcromartie	clojure.data.codec.base64/decoding-transfer
18:13	amalloy	jcromartie: he doesn't have streams either
18:13	jcromartie	oh
18:13	jcromartie	it's a request param?
18:13	[blake\|	Yeah. It's coming back from the client side.
18:13	justin_smith	yeah, which is why I suggested getting the jump on the default handler in order to get that raw body stream
18:14	justin_smith	that should be possible with a middleware in the right place in the stack
18:14	justin_smith	or did I articulate that? I meant to
18:14	[blake\|	justin_smith: You did, and I missed it.
18:15	jcromartie	is there a memory issue or something?
18:15	[blake\|	justin_smith: But I'm not sure how it helps.
18:15	jcromartie	because .getBytes should be fine
18:15	justin_smith	[blake\|: it gets the body stream, which will directly give you the bytes
18:16	justin_smith	that's a good point too, jcromartie, but I think if what you want is bytes, and that is the initial form coming in, it is silly to let the double conversion happen
18:16	[blake\|	justin_smith: Which...oh, okay, so you're saying something on the server side is turning this into a string from bytes?
18:16	jcromartie	if the body of the request is the base64-encoded string, then sure
18:17	jcromartie	[blake\|: how is the base64-encoded image being passed to the server?
18:17	jcromartie	POST?
18:17	jcromartie	as a form encoded param?
18:17	jcromartie	or as the entire request body?
18:19	[blake\|	As part of the "data" in a JQuery ajax POST.
18:20	jcromartie	as a part of it, or as the whole thing?
18:20	jcromartie	because you can send an object or a strign
18:20	jcromartie	string
18:21	jcromartie	in the former case the JS obj will be sent as form encoded params
18:21	[blake\|	It's not the only part, no. There are two parts. So it's &field1=whatever&field2=whatever...&screencap=toDataUrl()
18:21	jcromartie	in the latter it will be the literal POST body
18:21	jcromartie	ah ha
18:21	jcromartie	then I would skip worrying about intercepting the raw request body stream and just decode the (.getBytes (:screencap params))
18:21	jcromartie	well
18:22	jcromartie	the part after "base64,"
18:22	[blake\|	jcromartie: Thanks. I'll give that a try.
18:22	justin_smith	jcromartie: yeah, that's actually right, I forgot other stuff would likely be in the body
18:22	justin_smith	(inc jcromartie)
18:22	lazybot	⇒ 9
18:22	[blake\|	I may try later different configurations.
18:22	[blake\|	(inc jcromartie)
18:22	lazybot	⇒ 10
18:22	jcromartie	you'll need to pull apart the dataURL scheme
18:23	jcromartie	or you can do that in JS
18:35	SagiCZ1	how can i find out if a predicate is true for exactly one element
18:35	amalloy	filter the list with the pred, and check that its count is one via (and (seq xs) (not (next xs)))
18:36	SagiCZ1	amalloy: cool, thanks
18:37	jcromartie	amalloy: nice, works for lazy seqs :)
18:37	amalloy	jcromartie: yes, calling count is a sin
18:37	SagiCZ1	amalloy: wait and what if i dont to return that one elment
18:37	SagiCZ1	thsi would return true/false
18:38	amalloy	SagiCZ1: who cares? wrap it in boolean if that really matters
18:38	SagiCZ1	*what if i WANT to return that one elment
18:38	amalloy	SagiCZ1: you probably don't
18:38	SagiCZ1	[:a :a :b :a :a :a :a] -- > there is only one :b so return :b
18:38	amalloy	what if the thing for which the predicate passes is falsey?
18:39	SagiCZ1	then idk.. gosh this is hard :(
18:39	amalloy	eg, (one-matches? nil? [1 2 3 nil])
18:39	amalloy	will return nil, just like (one-matches? nil? [1 2 3])
18:39	SagiCZ1	ok then let it return nil.. thats cool
18:40	TEttinger	but nil is the "value not found" there
18:40	TEttinger	it can't also be "value found" and still be usable
18:40	TEttinger	(for collections containing nil that you want to find nil in)
18:40	SagiCZ1	wait but how do i get to the element still?
18:40	TEttinger	first xs
18:41	SagiCZ1	i need to return the element if there is only one passing that predicate, otherwise return nil
18:42	SagiCZ1	,(filter pos? [5 5 6 -1 -2 6 5])
18:42	clojurebot	(5 5 6 6 5)
18:42	TEttinger	,(let [coll [1 2 3] pred #(= (mod % 2) 0) xs (filter pred coll)] (if (and (seq xs) (not (next xs))) xs))
18:43	clojurebot	(2)
18:43	TEttinger	,(let [coll [1 2 3] pred #(= (mod % 2) 0) xs (filter pred coll)] (if (and (seq xs) (not (next xs))) (first xs)))
18:43	clojurebot	2
18:43	TEttinger	,(let [coll [1 2 3] pred #(= (mod % 2) 1) xs (filter pred coll)] (if (and (seq xs) (not (next xs))) (first xs))) ;; if more than one matches the pred....
18:43	clojurebot	nil
18:44	SagiCZ1	,(let [coll [1 2 3] pred #(= (mod % 2) 1) xs (filter pred coll)] (if (and (seq xs) (not (next xs))) (first xs)))
18:44	clojurebot	nil
18:45	SagiCZ1	i think this works great
18:45	SagiCZ1	thank you very much both
18:45	TEttinger	(inc amalloy)
18:45	lazybot	⇒ 210
18:45	SagiCZ1	(inc TEttinger)
18:45	lazybot	⇒ 36
18:46	TEttinger	slowly improving that thar karma
18:52	[blake\|	What makes "spit" only suitable for small amounts of data?
18:52	tcrayford____	it buffers all the data into a string at once (iirc)
18:53	[blake\|	tcrayford____: So, if I had all the data in a string already, I'd have two copies?
18:53	tcrayford____	or potentially you could exhaust the memory of the system
18:53	[blake\|	fair 'nuff
18:54	tcrayford____	and the JVM GC doesn't cope all that well with huge objects
18:54	[blake\|	tcrayford____: Cool, thx.
18:54	[blake\|	(inc tcrayford____)
18:54	lazybot	⇒ 1
18:56	TEttinger	(inc tcrayford)
18:56	lazybot	⇒ 1
18:57	tcrayford____	haha, I've only recently come back to this channel
18:57	tcrayford____	last time I was here heavily there wasn't a lazybot
19:00	TEttinger	lazybot's a good one. clojurebot has a better eval though, usually
19:00	amalloy	tcrayford____: lazybot used to be called sexpbot until like...two or three years ago
19:00	TEttinger	,(def something (map * (range) (range)))
19:00	clojurebot	#'sandbox/something
19:00	TEttinger	,(take 10 something)
19:00	clojurebot	(0 1 4 9 16 ...)
19:01	amalloy	&(take 10 (map * (range) (range)))
19:01	lazybot	⇒ (0 1 4 9 16 25 36 49 64 81)
19:01	amalloy	i can see why you'd like clojurebot's better :P
19:01	TEttinger	hehe
19:21	[blake\|	bytes are signed?
19:21	gfredericks	so signed
19:22	justin_smith	[blake\|: in java, everything is signed
19:22	mfikes	Except for char?
19:22	augustl	-127 is 0, yay
19:22	justin_smith	mfikes: char is not numeric
19:22	hyPiRion	except for the jars themselves
19:22	justin_smith	haha
19:22	gfredericks	~badum
19:22	clojurebot	Pardon?
19:22	gfredericks	~goards
19:22	clojurebot	Huh?
19:22	justin_smith	augustl: surely you mean -128
19:23	gfredericks	~guards
19:23	clojurebot	SEIZE HIM!
19:23	gfredericks	oh thank goodness
19:23	justin_smith	~gourds
19:23	clojurebot	SQUEEZE HIM!
19:23	gfredericks	yeah speling
19:23	augustl	justin_smith: I must have problems with my cache invalidation and/or naming things
19:24	justin_smith	augustl: the best version of that joke involves blurting "concurrency" in the middle of someone else telling the joke
19:24	gfredericks	there are only fifteen hard problems in computer science: naming things.
19:25	gfredericks	there are only 10 hard problems in THIS IS A JOKE ABOUT BINARY NUMBERS
19:26	justin_smith	gfredericks: aka bumbers
19:27	[blake\|	Well, dammit. I was afraid of this. I get my data decoded and written to disk and I can't read the resultant PNG. =(
19:29	gfredericks	(inc bumbers)
19:29	lazybot	⇒ 1
19:31	dbaston	does anyone know if I can cancel nREPL execution initiated from vim-fireplace? In my attempts to do elegant recursion I seem to be starting lots of infinite loops instead...
19:33	justin_smith	dbaston: https://github.com/tpope/vim-fireplace/commit/286a1f6c47fc0efe017e69c8e862e1433a4b6189 looks like it is supported as of this commit, dunno the keybinding though
19:40	dbaston	justin_smith: Thanks, you're right, and Ctrl-C seems to do the trick. I swear it didn't before now!
19:44	EvanR-work	make sure your elegant recursion includes evidence that it will either terminate or at least continue to produce useful results forever ;)
19:44	EvanR-work	elegant evidence* ;)
19:49	dbaston	my mistake is accidentally executing an "iterate" form
19:49	justin_smith	yeah, you usually want to put that inside a take-while or nth
20:03	[blake\|	Well, okay, looks like I've been going about this all wrong. I need to render a web-page to disk from the server. Is that a thing? Seems like it should be a thing.
20:08	munderwo	So if I want to build a vector of maps where each element from another sequece is one of the values… how do I do that?
20:08	munderwo	I tried something like (map #({:foo %1}) list-of-values)
20:09	tolstoy	(map :foo list-of-hashmaps)?
20:09	amalloy	munderwo: try writing it with (fn ...) instead of the #() shorthand
20:09	amalloy	and then look at what the #() shorthand expands to, noticing the difference
20:09	munderwo	yeah… just worked that out. Its always hard working out when #() will work and when it wont
20:10	amalloy	,'#({:foo %})
20:10	clojurebot	(fn* [p1__25#] ({:foo p1__25#}))
20:10	amalloy	see how that's different from (fn [x] {:foo x})?
20:10	munderwo	so this does what I want
20:10	munderwo	(map (fn [x] {:value x}) lines)
20:10	munderwo	ahh, because the map is in a list so it gets executed… I see
20:11	munderwo	which doesnt make sense because you cant execute a map..
20:11	justin_smith	munderwo: the easy way (I think) is to remember that #() always invokes its first arg, the first arg to #({}) is {}
20:11	amalloy	#() always has parens as the outermost thing
20:11	SagiCZ1	munderwo: you can do #(hash-map :foo %) but its not exactly the same as {:foo .. }
20:11	munderwo	yeah. that makes sense… Its just finding that out :)
20:11	justin_smith	,({:a 0} :a) ; munderwo
20:11	amalloy	munderwo: well, actually you can call a map as a function, but it doesn't do what you want
20:11	clojurebot	0
20:11	munderwo	thanks!
20:12	justin_smith	silly way to get {:foo %1}: #({:thing {:foo %1}} :thing)
20:15	amalloy	justin_smith: #(do {:foo %})
20:15	justin_smith	amalloy: that's not nearly as silly
20:15	amalloy	true
20:17	hyPiRion	"#() always has parens as the outermost thing" – ahem
20:17	hyPiRion	,((->> :ten #()))
20:17	clojurebot	:ten
20:18	justin_smith	hyPiRion: the parens that follow #
20:18	hyPiRion	ah, alright then
20:19	justin_smith	though I guess that macro displaces what eventually becomes its body...
21:38	charlesgiii	Is there a common way that people connect to the browser repl? I'd like to use vim (+vim-fireplace) to live code like Light Table provides
21:42	scottj	charlesgiii: austin https://cognitect.wufoo.com/reports/state-of-clojurescript-2014-results/
21:50	charlesgiii	scottj, thanks!
22:07	paomian	I have a problem,when i use the core.async,how to get the length of items which in chan
22:07	justin_smith	paomian: take them all and count while you are taking
22:10	paomian	justin_smith: Ok,i means that i don't know the consumer is to many or producer
22:11	justin_smith	I don't understand what you just said
22:11	amalloy	you can't inspect channels except by taking things from them
22:12	paomian	justin_smith: my englist is poor
22:12	paomian	I means that i take the chan like a queue
22:13	justin_smith	right, and you can't read or count the values without removing them from the channel
22:14	paomian	justin_smith: ok,i get it
22:14	paomian	thank you
22:45	DanielWu
22:45	DanielWu	(def postgres-db "postgresql://postgres:oracle@localhost:5432/example")
22:45	DanielWu	(j/update! (j/db-find-connection postgres-db) :connector_files {:message_create 1} ["file_id = ?" 10])
22:45	DanielWu	IllegalArgumentException db-spec false is missing a required parameter clojure.java.jdbc/get-connection (jdbc.clj:289)
22:45	DanielWu	What is missing?
22:45	DanielWu	use the same parameter I could run j/query function witout any issue, but if with update, then it failed.
23:06	justin_smith	DanielWu: so it works with no password?