#clojure – 2015-07-14

2015-07-14

00:07	divya_	Hello @all. Does anyone use Datomic? I'm just getting started with it, and would like to know how I can query the history attributes on each entity and retrieve results (for statistical purposes)
00:22	justin_smith	it's too bad run! doesn't take varargs
00:23	TEttinger	maybe it will make it into 1.7.0, justin_smith oh wait
00:43	Seylerius	With the Wunderground API, folks might buy different sets of API endpoints; what's the most clojurish way to, assuming that I've configured all the endpoints as functions, limit them to the plan they've bought?
00:44	Seylerius	For example, the 10day forecast is only available on the Cumulus and Anvil plans, whereas the Stratus level users have to make do with the 3day.
00:57	Seylerius	Also, is there somewhere app-wide I can look for a pool-size configuration, or should I just let the app define it with the same config atom I'm using for my API key and purchased rate limit?
01:16	Seylerius	What's a good default pool size?
01:27	Guest25767	so I decided to tech myself Ruby as a first language about a year ago and I recently stumbled upon Clojure. interesting stuff!
01:30	crocket	Can a simple daemon in clojure run under 16MB?
01:53	Guest25767	anybody out there?
01:56	engblom	Guest25767:
01:56	engblom	Guest25767: Ye
01:56	engblom	Guest25767: Yes
02:04	Guest25767	i've always had self limiting beliefs about myself being able to program
02:04	Guest25767	its only when i started trying to solve problems i realized it was just illusion
02:10	arrubin	crocket: I packaged the example code on the front page of the http-kit site up in an uberjar and ran it with -Xmx8M.
02:10	arrubin	Seems to work.
02:11	arrubin	Hmm. That does not seem to limit all memory used by java.
02:16	crocket	arrubin, How much RAM does it use?
02:17	arrubin	In Java 8, -XX:MaxMetaspaceSize controls another chunk of memory used, but I limited that to 12MB and the heap to 4M, and the overall process is still using about 40.5MB.
02:17	arrubin	And that seems to be the minimum Metaspace that still allows it to run.
02:17	arrubin	I do not know which other configuration options control memory, but I am guessing that getting everything below 16MB would be difficult.
02:18	Pupeno	I’m constructing a hashmap and I want to add :port port to it, but only if port is non-nil and not -1. What’s the most idiomatic way of doing that?
02:21	wasamasa	there is a certain bump involved though
02:23	Seylerius	,(let [m {} port 4] (if (not-any #(= port %) '(nil -1)) (assoc m :port port)))
02:23	clojurebot	#error {\n :cause "Unable to resolve symbol: not-any in this context"\n :via\n [{:type clojure.lang.Compiler$CompilerException\n :message "java.lang.RuntimeException: Unable to resolve symbol: not-any in this context, compiling:(NO_SOURCE_PATH:0:0)"\n :at [clojure.lang.Compiler analyze "Compiler.java" 6543]}\n {:type java.lang.RuntimeException\n :message "Unable to resolve symbol: not-any i...
02:24	Seylerius	,(let [m {} port 4] (if (not-any? #(= port %) '(nil -1)) (assoc m :port port)))
02:24	clojurebot	{:port 4}
02:24	Seylerius	Pupeno: Something like that, perhaps?
02:26	Pupeno	Seylerius: I was trying to not have yet another binding as it'll make the code look messy, hard to understand.
02:26	Seylerius	Pupeno: Ignore the let, that's just how I made sure I had a map and a port to test with.
02:27	Seylerius	The inner bit is what you want.
02:27	Seylerius	Basically, (if (not-any? #(= port %) [nil -1] (assoc m :port port)))
02:29	Pupeno	Seylerius: you are using m in there. Let me show you the code so it makes sense what I'm talking about:
02:29	Pupeno	https://gist.github.com/pupeno/a03b8863926cbed6ea2b
02:30	Pupeno	see the hashmap that has :db, :user, :password, :host, and :port. That's the one I'm trying to avoid complicating.
02:34	Seylerius	Pupeno: Have the piece-building functions return nil in the case of anything invalid, and then filter the nil keys out.
02:37	Seylerius	Pupeno: Something like (remove #(nil? (second %)) {:foo (get-foo)...})
02:39	Pupeno	In the clojure slack someone just pointed to this trick: (merge {:foo :bar :bar :foo} (if port {:port port}))
02:39	Seylerius	Pupeno: Hey, there's an idea.
02:40	Seylerius	I'd forgotten about merge.
02:40	Pupeno	Otherwise I was going for filter.
02:40	Pupeno	I wasn't very aware that merge handled nils so nicely.
02:41	crocket	-XX:MaxMetaspaceSize -Xmx
02:41	Pupeno	Is there a builtin way in Clojure of writing this without calling getPort twice? (if (not= -1 (.getPort parsed-uri)) (.getPort parsed-uri))... something like (return-if #(not= -1 %) (.getPort parsed-uri)) which would be trivial to implement.
02:43	Seylerius	Wait... what? I've been spending a bunch of damn time building a clojure lib for the Wunderground API, and look what there is: https://github.com/Raynes/ororo
02:50	Seylerius	Although, that one isn't Done Right™…
02:51	Seylerius	I'll have to fix it.
02:51	Seylerius	Still going to need to make my own.
02:59	crocket	arrubin, How did you execute your small clojure program?
02:59	crocket	I created a standalone uberjar.
03:05	Seylerius	What's better: http://sprunge.us/SPWg or http://sprunge.us/LJRa ?
03:24	amalloy	there's no real difference, Seylerius, except that i'd put a newline after the (fn []) if you choose that version
03:25	Seylerius	amalloy: I'll go with the #() then. Thanks.
03:33	schmir	I prefer (fn []..). you immediately see how many arguments the function takes without scanning the body
03:34	amalloy	that's a good point
03:52	Seylerius	I'm building a library for an API with both per-minute and per-day quotas (which of course vary based on what level of plan the user purchased). I'm doing the per-minute with a ScheduledThreadPoolExecutor, using an atom to track the next safe execution time, but I'm not sure what the best way to track the per-day quota would be. Should I just keep a counter for the day in an agent and reset it at midnight EST (when the provider's quota
03:52	Seylerius	resets)?
03:54	Seylerius	amalloy_: Did you miss my last question due to connection hiccups? The timing of your sudden nick-change looks vaguely like that...
03:56	Seylerius	I'm building a library for an API with both per-minute and per-day quotas (which of course vary based on what level of plan the user purchased). I'm doing the per-minute with a ScheduledThreadPoolExecutor, using an atom (or agent, I haven't decided which) to track the next safe execution time, but I'm not sure what the best way to track the per-day quota would be.
03:56	Seylerius	Should I just keep a counter for the day in an agent and reset it at midnight EST (when the provider's quota resets)?
04:06	Seylerius	Ach. What do I have to require to get ScheduledThreadPoolExecutor?
04:08	TEttinger	Seylerius: probably import, not require since it's a java class
04:08	Seylerius	TEttinger: And what the hell do I have to import?
04:09	TEttinger	it's in java.util.concurrent
04:09	TEttinger	which is weird but true
04:09	TEttinger	http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/ScheduledThreadPoolExecutor.html
04:09	Seylerius	So, how do I import that?
04:09	Seylerius	And just the bit I need...
04:10	TEttinger	at the repl, you'd do (import '[java.util.concurrent ScheduledThreadPoolExecutor])
04:10	TEttinger	in an ns, it's slightly different
04:10	TEttinger	(:import [java.util.concurrent ScheduledThreadPoolExecutor])
04:10	TEttinger	that last line would go inside an ns call at the top of your file, usually
04:10	Seylerius	There we go.
04:11	TEttinger	I think that should work, I'm very rusty on java interop
04:11	TEttinger	if it doesn't, try replacing the space after concurrent with a dot
04:11	TEttinger	(there's no way to mass-import everything in a package)
04:12	Seylerius	That got past that error.
04:16	Seylerius	Hrm. What's the clj-time way to find the next midnight-EST from now?
04:17	Seylerius	Ah, there we go.
04:18	H4ns	is there a way to wait for all threads to finish? i'm using the component library to start a few services (as threads) and now i wonder what the best way would be to wait for termination.
04:18	H4ns	i mean i can just sleep and loop, but maybe there is something better/more idiomatic?
04:19	TEttinger	isn't there a Thread.wait method or something along those lines? might even be in Object
04:20	H4ns	to join a thread, i first need to have a handle to it.
04:21	H4ns	i guess it will be best to just Thread/sleep forever
04:21	TEttinger	https://docs.oracle.com/javase/7/docs/api/java/lang/Thread.html#join(long)
04:21	TEttinger	oh ok
04:22	H4ns	ah, or i could join myself, that sounds clever :)
04:23	H4ns	(.join (Thread/currentThread)) it is
04:23	TEttinger	I don't really know how you wouldn't have a handle on the threads
04:23	TEttinger	I think you can probably iterate through them too
04:23	H4ns	i'm starting various components and they might start threads on their own.
04:23	H4ns	i don't think so. threads are not a managed resource.
04:25	TEttinger	https://docs.oracle.com/javase/7/docs/api/java/lang/Thread.html#enumerate(java.lang.Thread[]) wowza the recommendation
04:25	TEttinger	that copies the active Threads into a native array of Threads
04:27	H4ns	TEttinger: i'm reading "thread group" and think that it won't buy me anything to go down that rabbit hole now. self joining will do fine, thanks!
04:27	TEttinger	heh cool
04:44	Seylerius	TEttinger: Can you think of a more idiomatic way to do this? http://sprunge.us/ZjYh
04:46	TEttinger	Seylerius, yeah
04:47	Seylerius	Maybe factor the reset and .schedule lines out into a separate function?
04:47	TEttinger	you could make the reset! and .schedule the body, and set the relevant bindings with if in the binding part
04:48	TEttinger	(let [delay (if (t/after? (t/now) @safe-time) 0 (t/in-millis (t/interval (t/now) @safe-time)))])
04:48	Seylerius	TEttinger: Wait, like use an if to return a binding vector for the let?
04:48	Seylerius	Oh.
04:48	TEttinger	no, let can't take a vector like that sadly
04:48	TEttinger	there's only two!
04:49	Seylerius	TEttinger: Yeah, I'd need to "if" both bindings in the let, but that might work.
04:50	Seylerius	Pity you can't swap the whole binding vector, but this'll be better.
04:50	TEttinger	maybe
04:50	TEttinger	it's pretty good as is
04:50	TEttinger	not sure if my suggestion actually helps
04:50	Seylerius	Hmm...
04:51	Seylerius	The kicker is that next-safe and delay are both calculated differently depending on whether we've already crossed into safe-time or not.
05:11	kwladyka	what can i use to draw board in console? I need function to change position for example 3x4 without redrawing all board each time
05:12	kwladyka	also will be great if i can use colours
05:12	noncom	kwladyka: something in the ways of ncurses? maybe http://sjl.bitbucket.org/clojure-lanterna/ ?
05:14	kwladyka	noncom, i need draw chess board and figures on this chess, figures will move
05:14	kwladyka	noncom, so i guess it is not this
05:15	noncom	kwladyka: well, if you're to draw in console, what can be better than ncurses? lantern is javaish ncurses.. no?
05:15	kwladyka	noncom, i didn't use them so i don't know
05:15	kwladyka	fast looking in the internet show me something else :)
05:15	noncom	what was that?
05:16	kwladyka	i wrote ncurses in google and found https://pl.wikipedia.org/wiki/Ncurses
05:16	kwladyka	is in my language but from this i can read read is more to draw things like on image on this site
05:17	noncom	it just allows you to draw whatever you like in the terminal
05:17	noncom	many roguelikes use ncurses
05:17	noncom	(all of them to be precise)
05:17	kwladyka	http://sjl.bitbucket.org/clojure-lanterna/ <- but it can be what i am looking
05:18	kwladyka	so now i have to learn that :)
05:18	noncom	sure you will have to do the chess-drawing routines yourself. but at least, ncurses let you paint in the terminal... otherwise.. how is it possible...
05:18	noncom	frankly, i've never used that. but i read lots about it and it seems like it fits with your aims, so maybe yeah, maybe it will work. i am pretty sure it will...
05:21	kwladyka	but i am feeling like that http://devopsreactions.tumblr.com/post/115748298481/logging-in-to-an-old-server-to-update-bash
05:21	kwladyka	i want do something and all the time i have to something to do something :)
05:25	Seylerius	Grr... What does it take to make clj-time.format parse "12:57 AM PDT" to the most recent "12:57 AM PDT" that's not in the future?
05:28	Niac	(:require [clojure.core.async :as async :refer [go >! >!! <! chan]]
05:28	Niac	what's for ">!"
05:46	dstockton	There has been talk in the past of a datomic whitepaper. Is that still around somewhere? All links i've found seem to 404.
06:07	Seylerius	Okay, this shit is frustrating. I'm trying to add proper clj-time timestamps to this JSON (http://jsoneditoronline.org/?url=http://api.wunderground.com/api/8db70ebffc8a6252/forecast10day/q/NY/New_York.json), specifically the txt_forecast.
06:08	Seylerius	Replacing simpleforecast's date map with an actual clj-time date-time is trivial, but txt_forecast is a pain.
06:08	Seylerius	Any ideas how to attach a date-time to each entry in the txt_forecast?
06:14	kwladyka	How https://clojuredocs.org/clojure.core/ref https://clojuredocs.org/clojure.core/ref-set works? I am not sure what they do. (def terminal-size (ref [0 0])) set terminal-size as vector [0 0] but each time when i call (defn handle-resize [cols rows] (dosync (ref-set terminal-size [cols rows]))) i will update this value?
06:15	kwladyka	yeah i think like i said :)
06:16	noncom	kwladyka: yeah! things tail one another...
06:16	noncom	kwladyka: (regrding the video clip you poseted)
06:17	noncom	kwladyka: refs are just ways to store state.. something like atoms but more concurrency-enabled
06:18	noncom	kwladyka: the author uses refs because they allow to ensure the order of changes in a concurrent environment
06:18	noncom	see the (dosync ...) magic - it does that
06:19	noncom	in a more simple case you could go with atom, reset! and swap! but that would not allow for syncing the order of operations between threads
06:19	noncom	maybe the example you're citing implies that terminal is a process and you may be hooked on one or more processes through it, and also there is input and could be network...
06:21	Seylerius	Hah, nailed it.
06:25	kwladyka	noncom, thx
06:29	Seylerius	Weird. The println on line 143 is getting called, but the println on 150 isn't. http://sprunge.us/jbae
06:30	noncom	Seylerius: apparently, the if predicate passes for false?
06:31	Seylerius	Yeah, I figured that one out, now, but something else is breaking...
06:31	noncom	Seylerius: maybe you wanted to wrap the 'else' branch with a (do ...)
06:31	noncom	oh, you figured, ok
06:31	noncom	* the 'then' branch, sry
06:47	kaiyin	how should translate (use '(incanter core datasets)) into (ns (:use ...))?
06:47	kwladyka	hmm there is no more colours http://sjl.bitbucket.org/clojure-lanterna/reference/#colors ? Only this? Can i get brown?
06:48	kwladyka	https://github.com/sjl/clojure-lanterna/blob/master/src/lanterna/constants.clj <- it look not simple
06:48	kwladyka	and why googlecode?
06:54	Seylerius	How do I get the result of an event `.schedule`d onto a ScheduledThreadPoolExecutor?
07:03	Seylerius	TEttinger: You got any experience with ScheduledThreadPoolExecutors?
07:03	TEttinger	nope
07:06	Seylerius	Damnit. How the hell is a person supposed to get the result out of ScheduledThreadPoolExecutor.schedule?
07:09	loke	Seylerius: you don't?
07:11	Seylerius	loke: That'd be mightily lame... Do I have to stick what would be the return values onto a channel or something?
07:11	loke	Seylerius: Sorry. I double-checked the APIdocs
07:11	loke	you can
07:12	Seylerius	loke: How?
07:12	loke	.submot() returns a Future, and you simply call .get() on it
07:12	loke	.submit() even
07:12	Seylerius	loke: So I take the ScheduledFutureTask object that I get back from .schedule and pass it through .submit and .get?
07:13	Seylerius	No, that doesn't work.
07:14	loke	What is ShceuledFutureTask? .schedule() returns a ScheduledFuture which is a subclass of Future
07:14	loke	you can call .get() ont hat
07:14	Seylerius	loke: I tried calling .get on the output of .schedule, and got a lovely nil
07:15	Seylerius	Even though I pprint'd the value that was to be returned immediately before returning it in the scheduled function, and it was exactly the value I wanted.
07:15	loke	Seylerius: did you call .schedule() with a Callable? If you call it with a Runnable you get the wrong type of ScheduledFuture back.
07:16	Seylerius	loke: Look at do-api-call, line 133-169 (http://sprunge.us/IbHQ). It's calling .schedule with a bound-fn
07:17	loke	Yeah, I think that results in a Runnable being created behind the scenes
07:18	loke	You want to ensure a Callable is created
07:18	Seylerius	loke: How do I do that?
07:18	loke	I have no idea. I'I don't know the Java integration too well (I do Clojure using Clojurescript, but I know Java quite well)
07:19	Seylerius	(If I ever manage to understand this thing properly, I may just write a clojure wrapper around STPE that guarantees the right kinds of callables and gives back return values with some certainty.)
07:19	loke	Seylerius: Yes.
07:19	loke	That should work.
07:19	Seylerius	But at the moment, I don't even get what the difference is between a Callable and a Runnable.
07:20	Seylerius	And how to produce each in Clojure.
07:20	loke	I think Clojure is being clever and create the class for your automatically, but it fails here because the API has overloaded .schedule() to accept both Runnable and Callable, and clojure chose the former.
07:20	loke	A Callable can return a value while Runnable does not.
07:20	loke	a Callable can also thorw exceptions.
07:21	Seylerius	loke: That much seems clear, but why is Clojure picking Runnable, and how do I tell it that it's being stupid?
07:21	loke	Seylerius: 1) Because it's the first one to be retirned, probably. 2) I have no idea.
07:22	tcrayford____	`fn` implements both runnable and callable
07:22	tcrayford____	you wanna (cast Callable (fn [] blah))
07:22	Seylerius	tcrayford____: YAY!
07:22	loke	Oh. Clever
07:22	Seylerius	(inc loke)
07:22	lazybot	⇒ 1
07:22	Seylerius	(inc tcrayford____)
07:22	lazybot	⇒ 3
07:22	Seylerius	The answer has been found!
07:23	Seylerius	tcrayford____: Should be the return value of the Callable.
07:24	cfleming	You should be able to just type hint it rather than casting, too ^Callable #(whatever)
07:24	tcrayford____	right, but scheduled = it runs more than once…
07:24	Seylerius	tcrayford____: Wrong schedule. This is the run-one-after-a-delay schedule.
07:24	tcrayford____	ahhh, that makes sense
07:24	clojurebot	Excuse me?
07:24	Seylerius	There are a few others that do periodic.
07:24	tcrayford____	I've only ever used the periodic ones ;)
07:25	tcrayford____	cfleming: type hints are weird though because of metadata. Unsure if `fn` discards it's metadata like every other macro ever though
07:25	Seylerius	Can I just (deref (.schedule)), or @(.schedule)? or something?
07:26	cfleming	tcrayford____: Ah, good point - it probably does.
07:26	tcrayford____	don't think so - deref is clojure internal, not a java thing
07:26	Seylerius	Okay. So (.get (.schedule))?
07:26	tcrayford____	yeah
07:26	cfleming	tcrayford____: That may be the only use case ever I've seen for cast - I don't think I've ever used it, and I do a lot of interop.
07:27	tcrayford____	cfleming: ```richard-p-fineman-2.local:app(1d\|master) $ ag "cast" src \| wc -l
07:27	tcrayford____	2```
07:27	tcrayford____	https://www.irccloud.com/pastebin/Y12DPfZ8/
07:27	tcrayford____	both of those are functions passed to `ScheduledThreadPoolExecutor`
07:27	cfleming	Haha, there you go
07:28	Seylerius	Great. For some finicky java reason, it's still not working.
07:28	tcrayford____	honestly kinda thinking about metadata being discarded by macros as a compiler bug
07:28	Seylerius	tcrayford____, cfleming: are you two going to be around here in about 6-8 hours?
07:28	tcrayford____	wondering if the compiler should try and merge metadata back in (e.g. if `:tag` isn't present on the metadata of the return value of a macro)
07:28	cfleming	tcrayford____: https://www.refheap.com/106552
07:29	Seylerius	I need to sleep soon, and want to pick this crap up later. You two seem to get the interop better than most.
07:29	tcrayford____	reminder that (.startsWith ^String (or a b) "a") gets a reflection warning
07:29	tcrayford____	Seylerius: I make no promises about my availability
07:30	Seylerius	tcrayford____: Ballpark guesstimate if I promise not to shoot you for it being wrong?
07:30	cfleming	Seylerius: probably not, but if you drop a message here or in slack I'll see it sooner or later. Lots of other people here know interop though.
07:30	Seylerius	I oughta start hovering in the Clojure slack.
07:30	cfleming	tcrayford____: yeah, I'm planning an inspection in Cursive for those cases.
07:31	cfleming	tcrayford____: And yeah, I definitely consider that a bug.
07:31	tcrayford____	yeah, likewise with having scrollback be a real thing, I'll see it eventually
07:31	Seylerius	Okay, well, I'm going to hit the hay. I need to be functional and at the office in 7 hours.
07:31	tcrayford____	just, the only folk who get promises about availability are friends, family and Yeller customers ;)
07:31	Seylerius	Heh.
07:31	Seylerius	tcrayford____: You a Yeller person?
07:31	cfleming	Even my family get no promises :)
07:32	tcrayford____	I'm the Yeller person - CEO, Founder, Sole Dev etc. I'm the only person in the company
07:32	Seylerius	Only people who get promises from me are my girlfriend and my boss. Everyone else gets vague guesstimates.
07:32	Seylerius	Thanks for the help
07:32	tcrayford____	np, happy we could
07:33	tcrayford____	cfleming: having that as an inspection would be rad
07:33	cfleming	tcrayford____: Yup. With the new inference stuff I'll be able to highlight unnecessary hints, too.
07:33	tcrayford____	doope
07:33	cfleming	And suggest them when needed etc
07:34	tcrayford____	(BUY COLIN'S PRODUCT)
07:34	cfleming	^^^ WHAT HE SAID
07:34	cfleming	Oh, wait, you can't yet - that's my fault.
07:34	cfleming	Or rather, my bank's.
07:34	cfleming	grumble grumble
07:54	nooga	after playing with manifold, deferred deferred vector of deferreds is my new name
07:58	smith	Hi guys, a quick newbie question: how can I cast string to int in a clojure way?
07:58	smith	That is, without using Integer/Parse
08:04	dstockton	smith: whats wrong with parseInt?
08:04	dstockton	oops, ignore
08:04	dstockton	thought this was cljs
08:05	dstockton	no, Integer/parseInt is in fact right
08:05	tcrayford____	smith: Long/parseLong
08:05	tcrayford____	(assuming you want a long - you probably do)
08:06	smith	Ah, I see. Thanks.
08:06	smith	I was wondering if there is a way to avoid calling underlying Java methods.
08:06	smith	Guess not.
08:07	nooga	what's wrong with calling Java?
08:08	tcrayford____	smith: typical clojure style calls java quite a bit where it's needed. You can of course write your own wrappers
08:08	smith	Thanks, if that's how to do things in Clojure, then I don't have any problems.
08:09	nooga	it's free, easy enough and does not require typing java code
08:09	smith	It's just felt a liitle weird at first, that's all. :P
08:09	wasamasa	clojure's tight interop is at odds with writing code that could run on another clojure implementation
08:09	smith	wasamasa: That's another concern of mind too.
08:11	rarebreed	Isn't that what the new clojure 1.7 reader condition #$ is supposed to make easier?
08:11	nooga	I took Java libs for MS Azure stuff and wrapped Azure queues in core.async channels using ~7 lines of code
08:11	rarebreed	so you can have some stuff in :clj and other code in :cljs?
08:11	rarebreed	oops, I mean reader conditional
08:12	rarebreed	so that you can minimize or at least factor out clojure implementation specific code
08:13	smith	rarebreed: You mean this? http://dev.clojure.org/display/design/Reader+Conditionals
08:13	rarebreed	smith: yeah
08:14	rarebreed	my understanding is that you can place clj or cljs specific code wrapped in the reader conditional
08:14	rarebreed	I never looked at the .net version of clojure, and I didn't see any mention of it in that page
08:15	rarebreed	just out of curiousity, is anyone else here from Red Hat? :)
08:16	crocket	How do I launch a new thread and block the current thread indefinitely until the program receives a kill signal?
08:16	crocket	Is there an elegant way to block the current thread indefinitely until the program receives a kill signal?
08:16	H4ns	crocket: (.join (Thread/currentThread)) it is
08:17	nooga	rarebreed: red hat MTV?
08:17	crocket	H4ns, What is it?
08:18	rarebreed	nooga: MTV? not sure what that is...I'm out in RDU :)
08:18	nooga	rarebreed: mountain view
08:18	rarebreed	and tomorrow I get to start at a new position and do some clojure ;)
08:18	H4ns	crocket: the answer to your question - sorry about the "it is", that was from earlier today when i chose to use that as a solution to my similar problem.
08:18	rarebreed	nooga: ah, hadn't seen MTV before. Most of the guys I work with are in BRN or TLV
08:18	dnolen	rarebreed: reader conditionals indeed work well. Indeed ClojureScript's implementation is either 11000 lines of Clojure or 21000 lines of ClojureScript depending on your perspective :)
08:19	crocket	H4ns, Is there a clojure idiomatic way to do it?
08:19	rarebreed	dnolen: oh, is the clojurescript implementation itself using reader conditionals? cool :)
08:19	crocket	That's java way
08:19	dnolen	rarebreed: it does now
08:19	dnolen	for optional bootstrapping to JavaScript
08:19	H4ns	crocket: scroll back for the "parse integer" question that was discussed a few minutes ago.
08:20	nooga	rarebreed: I spent some time floor above RH MTV and met amny people in elevators :D
08:20	nooga	many*
08:20	crocket	H4ns, I wasn't here a few minutes ago
08:20	rarebreed	dnolen: well, that's good to know. I've done bits and pieces of clojure here and there. But soon I'm going to be doing clojurescript too.
08:20	rarebreed	so I need to check out how to use reader conditionals
08:20	H4ns	crocket: calling java is not unidiomatic in clojure.
08:21	crocket	I wonder if clojure has a function for that.
08:21	H4ns	crocket: it does not.
08:21	rarebreed	nooga: never been out to MTV. My hope is to convert more people to the clojure way ;)
08:21	rarebreed	I already got one of my coworkers on Openstack on it
08:21	rarebreed	and failing that...to use hy as a gateway drug to clojure hehe
08:22	rarebreed	crocket: maybe you can try to dereference the result of a future? that will block your main thread
08:23	crocket	rarebreed, How do I block a future?
08:23	nooga	Well I run a startup and we just binged on super smart talks about clj and cljs (nod dnolen) and then decided to use clj everywhere we can :D
08:23	crocket	future, delay, etc...
08:23	rarebreed	@(future (some-fn ...))
08:24	nooga	coming from node.js, java ee, python etc.
08:24	rarebreed	or (def result (future (some-fn ...)))
08:24	rarebreed	@resuilt
08:24	rarebreed	@result
08:24	H4ns	rarebreed: what would some-fn do?
08:24	rarebreed	the some-fn would be the function that is called in another thread
08:25	rarebreed	nooga: yeah, it seems like startups are the big pushers for clojure. I actually started writing some helper libraries for Openstack in clojure
08:25	rarebreed	it was not well received :p
08:26	nooga	:D
08:26	crocket	How do I trigger a form to be executed when I press Ctrl+C while (.join (Thread/currentThread)) is blocking?
08:26	puredanger	startups like Walmart, eBay, Netflix, etc
08:26	rarebreed	H4ns and crocket, when you dereference a future it will block the main thread until there's a result
08:26	nooga	puredanger: they always have some form of "internal startup"
08:27	rarebreed	puredanger: there are those too. and you forgot Staples :)
08:27	H4ns	rarebreed: yes, but we asked for blocking the main thread without having handles to other threads that may have been started.
08:27	nooga	R&D, consultants etc.
08:27	puredanger	I could go on for a while :) it's not always some "internal startup" either
08:28	puredanger	although that is certainly one important vector into bigger companies
08:28	H4ns	crocket: you'll need to reach out into java again. you could start here: http://stackoverflow.com/questions/11709639/how-to-catch-ctrlc-in-clojure
08:28	rarebreed	puredanger: I talked with some other guys at Red Hat who used to be on JBoss...apparently some testing uses clojure
08:28	rarebreed	and there's also immutant
08:29	nooga	I imagine, that most of the time, it starts with a side project like testing stuff, utilities
08:29	nooga	and then somebody goes "look, this took 2 hours"
08:29	puredanger	See: http://cognitect.com/clojure#successstories and http://clojure.org/companies
08:29	crocket	Oh java
08:29	rarebreed	H4ns: does it count not having a handle to a thread if you do @(future (some-fn ...))?
08:29	crocket	H4ns, I don't think a shutdown hook will be called if I press Ctrl+C to kill a block on REPL.
08:30	H4ns	rarebreed: i don't have handles to my threads right now, so self-joining works fine
08:30	H4ns	crocket: so you say that the answer on SO is wrong?
08:32	H4ns	crocket: ah, i hear what you say. sorry, no idea.
08:32	crocket	H4ns, a shutdown hook
08:32	H4ns	crocket: you want an sigint handler, not a shutdown hook.
08:32	rarebreed	so speaking of clojure evangelism....has anyone had success converting python shops to clojure\|scipt ?
08:32	rarebreed	arggh can't type today
08:33	nooga	I converted 3 pythonistas on my team :D
08:33	rarebreed	nooga: really? how'd you do it?
08:33	nooga	ant this has nothing to do with me being CTO
08:33	smith	rarebreed: just show them the benchmark
08:33	nooga	and*
08:34	rarebreed	so, until today, I've been a QE on the openstack project. Nova in particular
08:34	rarebreed	and lots of guys are dyed in the wool python guys
08:34	rarebreed	I haven't found a way to broach the "lispiness" of clojure
08:35	crocket	What
08:35	crocket	python is ok
08:35	crocket	python is ok for three day projects.
08:35	rarebreed	it's ok...but I'd like to introduce more people to clojure\|script
08:36	rarebreed	and there's like this immediate resistance to it
08:36	rarebreed	maybe bad memories of lisp or scheme in college...I dunno :)
08:37	nooga	show them your code and say "oh yeah, this took me about a week to write this awesome distributed data driven thingamajic so now I can update the config file and do magic"
08:37	tcrawley	rarebreed: what project are you on at RHT where you get to do clojure?
08:37	smith	rarebreed: in my experiences, most people are just more used to C/Java syntax
08:37	clojurebot	Titim gan éirí ort.
08:38	rarebreed	tcrawley: actually, I'm a quality engineer. Some of our testing code for candlepin/subscription-manager (believe it or not) is in clojure
08:38	rarebreed	candlepin itself is java/ruby
08:38	tcrawley	ah, neato. I'm at RHT as well, on Immutant
08:38	rarebreed	and subscription-manager is python
08:39	rarebreed	tcrawley: awesome...I'm just starting to learn immutatnt
08:39	tcrawley	come join us in #immutant if you have any questions
08:39	rarebreed	smith: yeah, I think you're right. most people just look at the syntax and get this knee-jerk reaction
08:40	smith	rarebreed: I'm an-ex Python programmer too, now I'm transition fulltime to Lisp/Clojure
08:40	rarebreed	the only thing I can counter with is "I bet when you first learned python you were like, 'white space matters? what kind of stupid language has white space that matters?'"
08:40	nooga	but lips have almost no syntax
08:41	rarebreed	that was my first impression with python :) and after 3 weeks, I didn't think about it anymore
08:41	nooga	I can't even start with Scala because syntax
08:41	smith	rarebreed: what made me switch was: 1. speed (while still a dynamic language) 2. REPL (Python "REPL" has nothing on Lisp/Clojure REPL 3. Gradual typing
08:41	nooga	and python with its whitespace
08:41	rarebreed	nooga: I tried learning haskell...and I will get back to it....but learning all the special syntax is such a drain
08:41	nooga	yeah
08:41	r4vi	you can actually make python repl work closer to lisp repl
08:41	nooga	exactly
08:41	r4vi	using ipython autorealod stuff
08:42	rarebreed	tcrawley: yeah, I'm sure I will. I'm actually new to the web programming scene. I'm still learning luminus, the DOM and a bunch of other things
08:43	rarebreed	my background has mostly been in hardware. embedded firmware, device drivers, and testing thereof
08:45	rarebreed	but I'm stoked I can actually do clojure and/or clojurescript full time now, and without it being skunkworks :D
08:51	tcrawley	rarebreed: good deal!
08:52	rarebreed	tcrawley: yeah. I found the position totally by accident too
08:53	rarebreed	tcrawley: just out of curiosity are you in Raleigh?
08:53	tcrawley	no, I'm in Asheville - remote
08:54	rarebreed	I just moved up here a year ago. I probably should see if there are any meetups around here. Cognitect isn't that far away in Durham
08:54	rarebreed	or is that Think Relevance...I forgot now
08:55	tcrawley	rarebreed: http://www.meetup.com/TriClojure/ is a great group of people
08:55	rarebreed	tcrawley: that's near the mountains right? I should go there sometime or Boone. I've been here a year and I've hardly seen North Carolina
08:56	tcrawley	yeah, Asheville is in the mountains
08:56	rarebreed	tcrawley: oh nice...looks like there's a meetup on the 30th :)
09:01	kwladyka	how (mod -10 3) gives 2 and (mod -2 5) gives 3?
09:02	kwladyka	'(mod -2 5)
09:02	kwladyka	`(mod -2 5)
09:03	kwladyka	,(mod -2 5)
09:03	clojurebot	3
09:07	TMA	kwladyka: because -10 = -4 * 3 + 2 and -2 = -1 * 5 + 3
09:07	H4ns	"lein ring" fails for me because somehow, tools.nrepl 0.2.6 is loaded even though i have tools.nrepl 0.2.10 as explicit dependency. Does that sound known to anyone?
09:08	kwladyka	TMA, thx
09:13	justin_smith	H4ns: a) lein sucks b) cider sucks c) all of the above d) ???
09:13	lazybot	justin_smith: How could that be wrong?
09:15	wink	H4ns: hm, there might be an open bug report about that
09:15	H4ns	justin_smith: that was helpful, thanks!
09:15	justin_smith	haha
09:15	wink	(or even several)
09:15	justin_smith	I promise, I wasn't trying to be helpful, but maybe I was accidentally so
09:19	kwladyka	what can i use instead "ref" to not parallel state?
09:22	kwladyka	To be more precise:
09:22	kwladyka	(def terminal-size (ref [0 0]))
09:22	kwladyka	(defn handle-resize [cols rows]
09:22	kwladyka	(dosync (ref-set terminal-size [cols rows])))
09:22	kwladyka	can i do this more simple if i dont need parallel?
09:22	justin_smith	kwladyka: if retries are OK and you don't need coordination you can use an atom
09:22	justin_smith	kwladyka: if you can't do retries, you can use an agent
09:23	kwladyka	justin_smith, retries?
09:24	justin_smith	atoms and refs retry - they redo the transformation if there is any parallel modification
09:24	kwladyka	justin_smith, i just want remember state to not pass it as parameter to all functions
09:24	justin_smith	kwladyka: all of these are ways to have global state
09:24	justin_smith	kwladyka: http://stackoverflow.com/questions/9132346/clojure-differences-between-ref-var-agent-atom-with-examples
09:31	kwladyka	justin_smith, thx
10:09	CookedGryphon	Hey, I'm doing some java interop with a static class, and the compile is failing with a verifyerror "Expecting a stackmap frame at branch target 17"
10:10	CookedGryphon	has anyone seen anything similary before?
10:10	CookedGryphon	it's in an extend-type
10:13	catonano	with clj-time I want to parse this datetime "25/03/2012 2.00"
10:13	catonano	this is my parser (let [multiparser (f/formatter (t/default-time-zone) "dd/MM/YYYY HH.mm" "YYYY-MM-dd HH:mm:ss")] ...
10:13	catonano	and
10:13	catonano	(f/parse multiparser source-datetime)
10:14	catonano	and I get
10:14	catonano	llegalInstantException Cannot parse "25/03/2012 2.00": Illegal instant due to time zone offset transition (Europe/Rome) org.joda.time.format.DateTimeParserBucket.computeMillis (DateTimeParserBucket.java:471)
10:14	catonano	I found this https://stackoverflow.com/questions/26162702/cannot-parse-datetime-illegal-instant-due-to-time-zone-offset-transition-euro?rq=1
10:14	catonano	but how do I deal with this with clj-time ?
10:17	catonano	oh with to-timezone
10:17	catonano	I see now
10:22	crocket	How do I extract two keywords from a map concisely?
10:22	crocket	Using a function, I can use destructuring. Without it, I don't know.
10:23	tcrayford____	crocket: select-keys?
10:24	tcrayford____	,(select-keys {:a 1 :b 2 :c 3} [:a :b])
10:24	clojurebot	{:a 1, :b 2}
10:24	mmeix	or maybe
10:24	mmeix	,((juxt :foo :baz) {:foo 1 :bar 2 :baz 3})
10:24	clojurebot	[1 3]
10:24	crocket	ok
10:24	tcrayford____	select-keys is designed for this though, and much less confusing than juxt imo
10:25	mmeix	juxt, if one only needs the vals, of course
10:25	perplexa	catonano: i also think "2.00" might cause an error with "HH.mm"
10:26	catonano	perplexa: thanks I'll check that
10:26	crocket	How do I convert a map into a pretty-print string?
10:27	tcrayford____	,(with-out-str (clojure.pprint/pprint {:a 1}))
10:27	clojurebot	#error {\n :cause "clojure.pprint"\n :via\n [{:type clojure.lang.Compiler$CompilerException\n :message "java.lang.ClassNotFoundException: clojure.pprint, compiling:(NO_SOURCE_PATH:0:0)"\n :at [clojure.lang.Compiler analyzeSeq "Compiler.java" 6740]}\n {:type java.lang.ClassNotFoundException\n :message "clojure.pprint"\n :at [java.net.URLClassLoader$1 run "URLClassLoader.java" 366]}]\n :tra...
10:28	tcrayford____	bah
10:28	tcrayford____	it's that
10:28	tcrayford____	just clojurebot don't know about pprint
10:28	catonano	perplexa: no, it's the same even with 25/03/2012 2.00
10:28	catonano	I mean 25/03/2012 02.00
10:28	catonano	oh wait
10:29	catonano	perplexa: here http://pastebin.com/KdhgDsYu
10:30	devn	Anyone in here an amateur cryptographer? I have some nasty Java code I've written to do PBKDF2 with HMAC SHA1, AES256/CBC/PKCS5Padding
10:30	devn	but I'd like to clean it up and use Buddy
10:30	CookedGryphon	crocket: you might want to look at something like fipp if you're doing pprint as part of your program, it's much faster and nicer output imo
10:30	devn	I'm trying to figure out how to compose all the right pieces in buddy to get the same result
10:32	perplexa	catonano: what is your multi-parser?
10:33	catonano	(def multi-parser (f/formatter (t/default-time-zone) "dd/MM/YYYY HH.mm" "YYYY-MM-dd HH:mm:ss"))
10:35	perplexa	catonano: havn't used multi formatters yet, docs suggest your syntax is right. maybe try without the default tz
10:35	catonano	right away
10:36	crocket	CookedGryphon, FIPP!
10:37	catonano	perplexa: it seems to be required. An exception claim the argument could not be parsed as a timezone
10:37	catonano	oh well
10:37	perplexa	likely the one you're trying to parse
10:38	catonano	perplexa: yeah ClassCastException java.lang.String cannot be cast to org.joda.time.DateTimeZone
10:38	crocket	What is a simple way to save configs in a file?
10:38	catonano	and the sttring is supposedly the datetime string
10:38	crocket	Should I just save a clojure map in a text file and read it?
10:39	devn	Anyone here using one of the kafka libraries?
10:39	devn	I have to say, I'm not all that impressed with what I've seen thus far.
10:39	perplexa	catonano: (tf/parse (tf/formatter "yyyyMMddHH") "2015010100") does that work for you?
10:39	devn	Which, don't get me wrong: I'm grateful for the free stuff! I guess I'm just surprised there isn't anything a little more complete out there.
10:39	perplexa	tf is clj-time.format
10:46	jcromartie	CIDER says it is connected, but it doesn't open a REPL.
10:46	jcromartie	nREPL server started on port 51573 on host 127.0.0.1 - nrepl://127.0.0.1:51573
10:46	jcromartie	I can connect to that from lein repl :connect...
10:46	jcromartie	but CIDER inside Emacs itself just sits there
10:47	jcromartie	I have CIDER version 20150713.1614
10:48	jcromartie	lesson learned: never update CIDER
10:48	devn	heh
10:48	devn	melpa-stable FTW
10:51	crocket	Does clojure 1.6 have clojure.edn namespace?
10:52	jcromartie	is there a way to install a version of CIDER that works without changing my MELPA archive ?
10:54	jcromartie	ah ha
10:54	jcromartie	(add-to-list 'package-pinned-packages '(cider . "melpa-stable") t)
10:55	jcromartie	I've been bitten by this before
10:55	jcromartie	I should have learned by now
10:55	catonano	perplexa: just a minute
10:55	devn	crocket: yes
10:56	jcromartie	oh
10:56	jcromartie	I can't do ththat (pinned packages)
10:56	devn	im pretty sure i have an error or two at the moment
10:57	devn	; CIDER 0.9.1 (Java 1.8.0_11, Clojure 1.7.0, nREPL 0.2.6)
10:57	devn	WARNING: CIDER requires nREPL 0.2.7 (or newer) to work properly
10:57	devn	I'm not sure why...
10:57	devn	well, I guess I'm not sure where I go to update nREPL
10:57	catonano	perplexa: yes, it works
10:59	devn	welp, I added [org.clojure/tools.nrepl "0.2.7"] to my ~/.lein/profiles.clj :dependencies [...]
10:59	devn	seemed to do the trick
11:00	catonano	perplexa: also (f/parse (f/formatter "yyyyMMddHH") "2012032502")
11:00	catonano	works
11:01	catonano	it's the same sate that can't be parsed with my multi-parser
11:02	perplexa	catonano: maybe ditch the multiparser or look into the lib what it's doing
11:02	perplexa	can't check right now, unfortunately
11:02	catonano	perplexa: thanks, I'll take a look at the lib code
11:08	crocket	What is a simple log library for clojure?
11:09	algernon	crocket: https://github.com/pyr/unilog
11:12	Empperi	also https://github.com/ptaoussanis/timbre
11:13	catonano	perplexa: I found the solution. It works with multiparsers too
11:14	perplexa	what was the error?
11:15	catonano	I used "parse-local" rather than "parse" That calls the java method "parseLocalDateTime" rather than the vanilla one
11:15	catonano	I saw it skimming through the code
11:16	perplexa	:)
11:16	catonano	the read me didn't mention it
11:16	catonano	perplexa: thanks !
11:18	perplexa	catonano: yw!
11:20	crocket	timber!!!
11:27	timvisher	anyone have a favorite way to set up an ssh port forward from clojure?
11:29	adgtl	Guys seeing this when I do cider-jack-in
11:29	adgtl	CIDER requires nREPL 0.2.7 (or newer) to work properly
11:30	timvisher	adgtl: i'll bite. :) do you have nrepl 0.2.7?
11:30	timvisher	keep in mind you need both the plugin and server for cider to work properly, afair
11:30	vaitel	https://github.com/clojure-emacs/cider#warning-saying-you-have-to-use-nrepl-027
11:31	timvisher	ooo… a FAQ!
11:39	adgtl	timvisher: Had to add https://gist.github.com/b12cdd1b65df187a58c5 to fix that
11:48	gzmask	How is the job market for Clojure right now? I am Canadian Web developer and looking for a clojure related job (preferable cljs).
12:01	crocket	yay
12:18	TimMc	gzmask: There are definitely some employers. Have you checked functionaljobs?
12:19	gzmask	Yes, there are the reuter one and couple others (mostly in UK)
12:19	arrubin	There are actually more Clojure jobs here: http://careers.stackoverflow.com/jobs?searchTerm=clojure
12:19	gzmask	applied for the reuter job, but not willing to relocated to UK at the moment
12:21	gzmask	I have checked that too. I am more interested in startups with interesting projects
12:21	arrubin	One moment.
12:21	arrubin	https://news.ycombinator.com/item?id=9812245
12:21	arrubin	Search for Clojure there.
12:21	arrubin	Watch that account on the first of each month.
12:22	gzmask	especially those ones who is going to use clojurescript with OM/Reagent and reactive native
12:23	gzmask	Thanks, looks like a good place to start :)
12:23	hiredman	the amount of clojure jobs where they want you on site is very disappointing
12:23	gzmask	I bet most of these jobs are database/business centric?
12:23	gzmask	@hiredman
12:24	hiredman	gzmask: a lot of them are for clojurescript
12:25	gzmask	clojurescript is exactly what I am after
12:28	arrubin	gzmask: I do not know how effective it is, but that same HN account has a "Who wants to be hired?" submission on the first of each month too.
12:32	TimMc	gzmask: Not back-end stuff?
12:33	gzmask	thanks, I am looking at his submissions.
12:34	TimMc	My employer might be hiring soon. I can't promise Clojure, but we've racked up a few Clojure projects so far.
12:34	gzmask	TimMc: I did MySQL/Oracle and server administration tasks, so I have a little bit server side experience
12:35	gzmask	TimMc: where are you guys located?
12:38	TimMc	gzmask: Boston.
12:41	gzmask	Good city. PMed.
12:45	edoloughlin	l/nick edoloughlin_
14:38	Seylerius	Okay, java interop time: How the fsck do you get the result out of scheduling a task into a ScheduledThreadPoolExecutor?
14:38	Seylerius	It's not deref or .get
14:40	hiredman	it is
14:40	puredanger	it returns a future of some kind I presume which I would expect to work with deref?
14:40	Seylerius	Well, both of those failed.
14:41	hiredman	I (and others I am sure) happen to know that they work, so you should re-examine what you are doing for errors or share more of what you are doing
14:41	Seylerius	I've told the scheduled task to pprint the value before returning it, and it's the value I wanted, but both deref and .get on the future that results give me a nil.
14:41	hiredman	pprint returns nil
14:42	Seylerius	hiredman: It was (let [data foo] (pprint data) data)
14:42	Seylerius	To ensure that the data was still returned
14:42	Seylerius	And I've since removed that pprint.
14:43	Seylerius	http://sprunge.us/CfCJ
14:44	hiredman	so deref and .get do work, but they are returning nil?
14:44	Seylerius	do-api-call (133-173) actually does the scheduling, while forecast-10day calls do-api-call and wants to deref the future
14:44	Seylerius	hiredman: Yep.
14:44	Seylerius	They don't error out, but they return nil.
14:45	hiredman	which, I am guessing here, if you read the docs for scheduled tasks is what the futures return
14:45	hiredman	http://docs.oracle.com/javase/6/docs/api/java/util/concurrent/ScheduledExecutorService.html#schedule%28java.lang.Runnable,%20long,%20java.util.concurrent.TimeUnit%29
14:45	hiredman	checkout Returns:
14:46	Seylerius	hiredman: It's the other schedule, the one that takes a callable.
14:46	blake_	OK...back to this old problem. =P I've got a ring app and I want some code in there to run ONLY when the app is actually deployed. (It's a scheduler so if I just let it execute on compilation, the compilation never actually comes back.)
14:46	Seylerius	Because I cast the function to a callable.
14:47	hiredman	Seylerius: it seems pretty obvious that in fact the runnable method is being called
14:47	hiredman	what makes you think the Callable one is being called?
14:49	Seylerius	hiredman: Maybe the fact that the only difference between them is whether they're called with a Callable or a Runnable and I cast the function it's called on to a Callable?
14:49	hiredman	a quick test would be to replace the casting stuff with (let [f (bound-fn ...)] (reify Callable (call [_] (f))))
14:49	Seylerius	Okay.
14:49	hiredman	Seylerius: cast is more subtle than that
14:49	Seylerius	Great.
14:49	Seylerius	The only time Clojure ever frustrates me is when I have to fight with Java.
14:50	devn	hiredman: a couple of years ago you posted a gist of yours that was a core.async pipeline thingamajig.
14:50	devn	you don't happen to have that handy, do you?
14:50	hiredman	the clojure compiler doesn't know the result of (thread-pool) is a thread pool, so the method call is falling back to reflection, in which case your cast is ignored
14:51	hiredman	the thread pool atom thing is a race condition too, you should consider using a delay
14:52	devn	hiredman: nevermind, found it at https://gist.github.com/hiredman/11194485
14:53	Seylerius	hiredman: What would you do there, to fix the thread-pool atom?
14:54	hiredman	that is complicated, but the quickest "fix" would be (def pool (delay (ScheduledthredPool...)))
14:55	hiredman	and @pool as required
14:55	seangrove	What function would transform "a/b/c/d/e" -> ["a" "a/b" "a/b/c" "a/b/c/d" "a/b/c/d/e"] ?
14:56	Seylerius	hiredman: The reify bit fixed it.
14:57	hiredman	another possible fix (but more fragile because it relies are type hints for correct behavior vs. type hints to remove reflection for speed) would be to type hint the call to (thread-pool)
14:57	hiredman	relies on
14:58	Seylerius	Hmm... I'm going to look up the delay tool
14:59	Seylerius	hiredman: Ah, a delay basically /is/ the thread-pool function.
15:00	Seylerius	Give the thing, or make one if we don't got one yet.
15:00	hiredman	yeah, but with the right locking around it to not be a race condition
15:00	Seylerius	Right.
15:01	Seylerius	When the language designers have already made a thing that does what I want, use that, because they've probably accounted for some crap I didn't think of.
15:04	TimMc	seangrove: feels a bit like clojure.core/reductions
15:05	TimMc	or iterate with removing stuff from the end, then reverse it
15:11	justin_smith	TimMc: with a take-while. I should totally make a function that composes iterate with take-while
15:11	justin_smith	iterate-while
15:16	gfredericks	is there a good repl tool for getting enhanced docs from somewhere?
15:18	andyf_	gfredericks: Not sure if these are anywhere near your question. There is a library called cd-client that retrieves examples from ClojureDocs.org and can work at the REPL. Unfortunately the last time I checked, its examples are frozen at the state of ClojureDocs.org from Sep 2014, I think when they updated the web site implementation to Clojure.
15:19	andyf_	gfredericks: My thalia library monkey-patches clojure.core Vars to change the doc strings, but only for a few Vars that I've written doc strings for.
15:20	andyf_	gfredericks: Brian Marick announced such wow on the Clojure Google group recently, which I've read does something similar, but I haven't tried it yet, or looked at his enhanced doc strings.
15:21	andyf_	There is a bit of discussion in that thread about how to combine the best of such things, and maybe it dovetails with a current Google Summer of Code project for Clojure
15:27	seangrove	TimMc: I like the iterate idea
15:28	TimMc	reduce would be easier to understand, I think
15:29	TimMc	&(reductions #(str % \/ %2) (.split "a/b/c/d/e" "/"))
15:29	lazybot	⇒ ("a" "a/b" "a/b/c" "a/b/c/d" "a/b/c/d/e")
15:29	amalloy	i think it's reductions
15:31	seangrove	TimMc: Much better that what I just wrote with iterate, yes
15:32	TimMc	&(take-while some? (iterate #(let [li (.lastIndexOf % "/")] (when (<= 0 li) (.substring % 0 li))) "a/b/c/d/e"))
15:32	lazybot	⇒ ("a/b/c/d/e" "a/b/c/d" "a/b/c" "a/b" "a")
15:32	TimMc	yuck!
15:32	TimMc	'course you still need the reverse on the first one
15:40	scriptor	,(let [s "a/b/c/d/e"] (map #(subs s 0 (inc %)) (range 0 (count s))))
15:40	clojurebot	("a" "a/" "a/b" "a/b/" "a/b/c" ...)
15:41	scriptor	hmm...
15:41	scriptor	,(let [s "a/b/c/d/e"] (map #(subs s 0 (inc %)) (range 0 (count s) 2)))
15:41	clojurebot	("a" "a/b" "a/b/c" "a/b/c/d" "a/b/c/d/e")
15:41	scriptor	there we go
15:41	TimMc	scriptor: I don't think we can count on the segments always being length 1.
15:41	TimMc	seangrove: ^?
15:42	TimMc	but that's an interesting idea... if there were a way to get the positions of all the slashes easily...
15:42	scriptor	yeah, this is entirely assuming it's one char per slash
15:53	justin_smith	.indexOf "/" or some such
15:53	justin_smith	(for generating the split position number)
16:03	justin_smith	any source for a good intro to using kafka from clojure? I tried to follow the readme for clj-kafka but I think I'm using some of the magic numbers wrong, or my kafka setup is fucky, or I don't even know, I'm just getting a lot of errors I don't understand
16:06	blkcat	kafka really lives up to its namesake sometimes :)
16:43	Cr8	,(let [s "a,bcde,f,gh" h ","] (for [x (range (count s)) :when (.startsWith (subs s x) h)] x))
16:43	clojurebot	(1 6 8)
17:03	TimMc	Cr8: hah!
17:03	justin_smith	duplicate linear searches though
17:05	justin_smith	wait, no, never mind
17:10	justin_smith	,(take-while #(>= % 0) (iterate #(.indexOf "a,bcde,f,gh" (int \,) (inc %)) 0))
17:10	clojurebot	(0 1 6 8)
17:10	justin_smith	the 0 is noise, of course
17:11	justin_smith	,(take-while pos? (rest (iterate #(.indexOf "a,bcde,f,gh" (int \,) (inc %)) 0)))
17:11	clojurebot	(1 6 8)
17:11	justin_smith	much better
17:12	blake_	Somewhere along the line my Widlfly deployment stopped working and it seems to be related to the security constraint. My WAR redirects 8080 to 8443 but now responds at 8443 with an SSL connection error.
17:13	justin_smith	blake_: someone was asking about something very similar recently (within the last week?), you may want to check the logs for the channel for Wildfly / immutant mentions
17:14	blake_	tx, justin_smith
17:15	jonathanj	is there some way to avoid the redundancy of declaring liberator resource decision functions when using compojure's (context) macro?
17:24	blake_	justin_smith: Although actually that might have been me, too.
17:27	csd_	hi does anyone know if its possible to pass an async channel into a quartzite job?
17:28	justin_smith	blake_: heh, iirc tcrawley-away is the guy working on immutant, right?
17:33	blake_	justin_smith: I think he and jcrossley3 have been my big helps in the past on this.
17:36	jcrossley3	blake_: what's the issue?
17:37	jcrossley3	csd_: that should be fine as long as you're only using the default in-memory persistence
17:37	blake_	jcrossley3: I have an app with a web.xml file that contains a security-constraint section.
17:37	jcrossley3	right, didn't we already discuss this a while back?
17:38	blake_	jcrossley3: So when I go to my-server:8080, it gets pushed over to my-server:8443.
17:39	blake_	jcrossley3: Yeah! But at the time I thought the issue was the java-servlet version.
17:40	jcrossley3	blake_: so do you want the redirect, but you're getting an error from wildfly's https handler? if so, then #wildfly might be more helpful.
17:51	blake_	jcrossley3: I've got to deploy with HTTPs, yeah, but Wildfly actually shows no error. It returns an error to the client.
17:52	blake_	jcrossley3: Yeah, I trolled #Wildfly for a while with no luck.
17:52	jcrossley3	blake_: what error?
17:53	blake_	jcrossley3: A standard SSL connection error. "Unable to make a secure conneciton to the server..."
17:54	jcrossley3	blake_: have you set up your keys and a self-signed cert?
17:55	blake_	jcrossley3: Not locally, no. I guess I should start there.
17:55	xemdetia	blake_, what does openssl s_client -connect thehost:8443 if anything
17:55	xemdetia	short output=bad, long output=good
17:56	blake_	xemdetia: Bad file descrptor, errno=10061
17:56	blake_	(so, short)
17:56	jcrossley3	blake_: http://stackoverflow.com/questions/29138478/how-to-configure-ssl-in-wildfly-8-2-0-server
17:57	jcrossley3	blake_: it's easier in immutant ;) (but you still need to create keys)
17:57	blake_	jcrossley3: Thanks. I was trying to figure out if it changed 9.0. Previously, I've had the same web.xml running with the same security constraints, and it worked locally and remotely.
17:58	cryptack_	hey, if I have a namespace in an EDN file (e.g. {:namespace ‘my-ns}) and I pull it into a var (e.g. (let [{n :namespace}])) I’m wondering how do I call a function, say “my-fun” under this namespace….I can’t perform (n/my-fun) as when compling “n” doesn’t match a namespace
17:58	jcrossley3	blake_: and it was being successfully redirected to 8443? strange
17:58	blake_	jcrossley3: I'm close to using immutant. =P
17:58	blake_	jcrossley3: Yeah, it's been making me crazy. I've been going back to an earlier version that's actually IN production to see if I can recreate the working WAR and have had no luck.
18:00	xemdetia	sorry blake sounds like an app problem not at tls problem :(
18:01	blake_	xemdetia: Yeah, I know. I did a mass update of project dependencies right before this and thought maybe THAT broke it. But even rolling back didn't seem to help.
18:01	xemdetia	yuck
18:01	jcrossley3	blake_: can you grab a copy of the war in production and crack it open to verify the web.xml is as you expect?
18:01	blake_	jcrossley3: I can't personally but I might be able to get it. Good idea.
18:02	jcrossley3	blake_: if it does in fact have that PRIVATE constraint in there, then i would expect your standalone.xml to include a 'certificate-key-file' attribute
18:03	blake_	jcrossley3: I can guarantee the security constraint is in there and that there is no certificate-key-file attribute. Well 99% sure, anyway. I'll see if I can grab the WAR.
18:12	jcrossley3	blake_: maybe not a certificate-key-file, but at least an https-listener element, and i don't believe there is one configured in the default wildfly config (either 8 or 9)
18:14	blake_	jcrossley3: Could it be something that was included in (say) lein-ring or some other library that was removed? I mean, I thought I undid my lein-ring upgrade but maybe not.
18:16	jcrossley3	blake_: i tend to doubt it. if you know for a fact that ssl is working in your production environment, and you're passing ssl requests to wildfly, i.e. no reverse proxy involved, it's likely because someone added an https-listener to your standalone.xml
18:18	blake_	jcrossley3: I would expect that to use the local git repository and be visible but I guess it could be done in Chef. I'll be pissed if that's the case.
18:18	jcrossley3	blake_: if there is a reverse proxy involved, all bets are off, because it may be doing the redirect itself
18:19	blake_	jcrossley3: That could be. They don't like to tell us what they're doing. =)
18:19	jcrossley3	:)
18:20	blake_	It does happen that they mess with things without telling us and then weeks later, after we've torn our hair out trying to debug our stuff, say "Oh, yeah, we tweaked some stuff. Nobody noticed."
18:22	justin_smith	blake_: I would take a statement like "Oh, yeah, we tweaked some stuff. Nobody noticed."
18:23	blake_	justin_smith: lol
18:23	justin_smith	as an invitation to ask them as your first resort if anything isn't working
18:24	justin_smith	if nothing else it means next time they know "someone noticed"
18:24	blake_	justin_smith: High turnover. There's no departmental memory. It's like Memnto meets Groundhog Day.
18:24	jcrossley3	blake_: i'm happy to help once you know what's going on. and ping us in #immutant if you decide to go that route.
18:25	blake_	jcrossley3: Thanks! Much appreciated. Might've spared me some angst.
18:25	blake_	bbl
18:54	rhg135	is there a good way to debug a profiles.clj? I can't figure out why a dependency (alembic) isn't being loaded. but when I move it to my project.clj it is.
18:55	justin_smith	rhg135: do any of your profiles.clj deps work?
18:56	rhg135	yes, justin_smith, all but this one it seems
18:56	rhg135	well, I had tried spyscope and it also failed
18:56	justin_smith	because the simplest explanation would be that your profiles.clj is merely malformatted
18:58	Seylerius	If I've got a coll of several strings that might occasionally be intermixed with numbers, and I want them to just be numbers, how does one accomplish this?
18:59	rhg135	(filter number? coll)
19:00	Seylerius	rhg135: Nah, I want to transform the strings to numbers.
19:00	rhg135	oh
19:00	Seylerius	["2015" "07" 09 12 "00"]
19:00	Seylerius	Needs to become [2015 7 9 12 0]
19:01	rhg135	try ##(keep #(try (Integer/parseInt %) (catch Exception _ nil)) ["1"])
19:01	lazybot	java.lang.SecurityException: You tripped the alarm! catch is bad!
19:01	rhg135	well
19:01	rhg135	try it at home I guess
19:03	rhg135	I think I may just be overlooking something https://www.refheap.com/106576, and no, lein deps :tree just lists my project's deps
19:11	TEttinger	,(map read-string ["2015" "07" 09 12 "00"])
19:11	clojurebot	#<NumberFormatException java.lang.NumberFormatException: Invalid number: 09>
19:11	TEttinger	,09
19:11	clojurebot	#<NumberFormatException java.lang.NumberFormatException: Invalid number: 09>
19:12	amalloy	TEttinger: you want integer/parseint
19:12	TEttinger	Seylerius: 09 is not valid as a number
19:12	amalloy	with the radix 10 specified
19:12	justin_smith	,017
19:12	clojurebot	15
19:12	amalloy	it doesn't really matter for [09], because you can't have a value that prints that way
19:12	TEttinger	amalloy: the example he gave had non-string number 09
19:13	amalloy	TEttinger: sure, it was an example he made up, because it is impossible to have such a thing
19:13	TEttinger	k
19:13	justin_smith	,0123
19:13	clojurebot	83
19:13	TEttinger	yes justin_smith they're octal
19:13	justin_smith	yes, for some reason I find that amusing
19:13	justin_smith	,0xdeadbeef
19:13	clojurebot	3735928559
19:14	TEttinger	,36rILIKEPIE
19:14	clojurebot	1457390052518
19:14	amalloy	because if there's one tradition from C that we need to keep carrying over to new languages, it is the ability to write numbers in base 8
19:14	TEttinger	and in clojure's case, base 27
19:14	amalloy	i guess i don't mind the ability to do that, like 8r755
19:14	amalloy	but to use something innocuous like 0755 is confusing
19:15	TEttinger	,27rGAMBLE
19:15	clojurebot	235338548
19:16	TEttinger	,(map #(read-string (str "10r" %)) ["2015" "07" 09 12 "00"])
19:16	clojurebot	#<NumberFormatException java.lang.NumberFormatException: Invalid number: 09>
19:16	TEttinger	hm
19:17	TEttinger	,10r09
19:17	clojurebot	9
19:17	TEttinger	right it's before that
19:17	TEttinger	,(map #(read-string (str "10r" %)) ["2015" "07" 9 12 "00"])
19:17	clojurebot	(2015 7 9 12 0)
19:18	justin_smith	TEttinger: from a coworker ##(identity 36rwhatisthemeaningoflife`
19:18	justin_smith	err
19:18	TEttinger	,36rwhatisthemeaningoflife
19:18	clojurebot	15630618813727882227183131952537482N
19:18	TEttinger	,36rwhatisthemeaningoflifetheuniverseandeverything
19:18	clojurebot	350942681731242990203511395147592895386304091688071820253349265705971116N
19:19	TEttinger	,35rwhatisthemeaningoflifetheuniverseandeverything
19:19	clojurebot	98826347130333606158459885179744852531856458432998128759946017006701121N
19:19	justin_smith	,(.indexOf (str 35rwhatisthemeaningoflifetheuniverseandeverything) "42")
19:19	clojurebot	-1
19:19	justin_smith	:(
19:20	justin_smith	,(.indexOf (str 36rwhatisthemeaningoflifetheuniverseandeverything) "42")
19:20	clojurebot	4
19:23	Seylerius	amalloy, TEttinger: The Wunderground API returned the following as a date: {:date {:pretty "July 9, 2015" :year "2015" :mon "07" :mday "09" :hour "12" :min "00" :tzname "America/Los_Angeles"}}
19:24	amalloy	right, and those are all strings
19:24	Seylerius	And I want them to be numbers.
19:24	Seylerius	Sometimes they'll return numbers interspersed with the strings.
19:24	Seylerius	Well, all except :pretty and :tzname
19:25	Seylerius	But read-string craps on "09" (first thing I tried)
19:25	TEttinger	correct
19:25	TEttinger	09 is not a valid literal
19:25	TEttinger	but you can do
19:25	Seylerius	Is there a function that will trim leading 0s?
19:25	TEttinger	,10r09
19:25	clojurebot	9
19:25	TEttinger	10r is radix 10
19:25	TEttinger	or
19:26	TEttinger	#(Integer/parseInt % 10)
19:26	TEttinger	but that will crap on strings
19:26	TEttinger	I guess so will 10rbob
19:26	Seylerius	Well, I don't particular expect :min to hold "bob" any time soon.
19:28	TEttinger	,(map read-string #(re-find #"[1-9]*[0-9]$" %) ["9" "09" "0" "00"])
19:28	clojurebot	#<IllegalArgumentException java.lang.IllegalArgumentException: Don't know how to create ISeq from: sandbox$eval48$fn__49>
19:29	TEttinger	,(map #(read-string (re-find #"[1-9]*[0-9]$" %)) ["9" "09" "0" "00"])
19:29	clojurebot	(9 9 0 0)
19:29	TEttinger	Seylerius: does that work?
19:29	Seylerius	Yeah, it does.
19:29	Seylerius	That strips any leading zeroes, don't it?
19:30	TEttinger	yep
19:30	Seylerius	W1n.
19:30	Seylerius	(inc TEttinger)
19:30	lazybot	⇒ 60
19:30	TEttinger	let me do some more testing!
19:30	Seylerius	I'll give more karma for more testing.
19:31	Seylerius	You've been warned.
19:31	TEttinger	&(map #(read-string (re-find #"[1-9]*[0-9]$" %)) ["9" "09" "009" "0" "00" "000" "16" "016"])
19:31	lazybot	⇒ (9 9 9 0 0 0 16 16)
19:31	TEttinger	so far so good
19:32	TEttinger	&(map #(read-string (re-find #"[1-9]*[0-9]$" %)) ["9" "09" "009" "0" "00" "000" "16" "016" "160" "0160"])
19:32	fmzakari	hi, does anyone have any code examples of doing pagination in a ring web app?
19:32	lazybot	⇒ (9 9 9 0 0 0 16 16 160 160)
19:32	Seylerius	&(map #(read-string (re-find #"[1-9]*[0-9]$" %)) ["9" "09" "009" "0" "00" "000" "16" "016" "160" "0160" "2015"])
19:32	lazybot	⇒ (9 9 9 0 0 0 16 16 160 160 15)
19:32	fmzakari	I'm specifically using https://github.com/krisajenkins/yesql and wondering how to do it clojure-idiomatic
19:32	TEttinger	a ha!
19:34	justin_smith	fmzakari: we have pagination in caribou, which is not updated very often, and I'd have to double check if there is a place where it is coherently / readably defined
19:34	TEttinger	&(map #(read-string (re-find #"^(?:0)[0-9][0-9]$" %)) ["9" "09" "009" "0" "00" "000" "16" "016" "160" "0160"])
19:34	lazybot	java.lang.NumberFormatException: Invalid number: 09
19:34	TEttinger	hm
19:34	fmzakari	is caribou an OSS site or framework?
19:34	fmzakari	let me lookit up.
19:35	TEttinger	&(map #(read-string (re-find #"^(?:0?)[0-9][0-9]$" %)) ["9" "09" "009" "0" "00" "000" "16" "016" "160" "0160"])
19:35	lazybot	java.lang.NumberFormatException: Invalid number: 09
19:35	justin_smith	fmzakari: it's a clojure web thing that's either kind of tightly bundled for a collection of libs, or very loosely put together for a framework
19:36	justin_smith	comes with a db abstraction using clojure data and an in-browser CMS app that's friendly for eg. frontend guys or producers to use to define basic data models or input data
19:36	Seylerius	&(map #(read-string (re-find #"(?=0+)[1-9][0-9]*$" %)) ["9" "09"
19:36	Seylerius	"009" "0" "00" "000" "16" "016" "160" "0160" "2015"])
19:36	Seylerius	&(map #(read-string (re-find #"(?=0+)[1-9][0-9]*$" %)) ["9" "09" "009" "0" "00" "000" "16" "016" "160" "0160" "2015"])
19:36	Seylerius	Did I crash lazybot?
19:36	lazybot	java.lang.RuntimeException: EOF while reading, starting at line 1
19:36	lazybot	java.lang.NullPointerException
19:36	Seylerius	,(map #(read-string (re-find #"(?=0+)[1-9][0-9]*$" %)) ["9" "09" "009" "0" "00" "000" "16" "016" "160" "0160" "2015"])
19:36	Seylerius	Whooo! lag!
19:36	clojurebot	#<NullPointerException java.lang.NullPointerException>
19:36	justin_smith	Seylerius: you were lagged, and then spammy
19:36	Seylerius	Yep
19:37	Seylerius	Let's try this properly now
19:37	Seylerius	&(map #(read-string (re-find #"^(?=0+)[1-9][0-9]*$" %)) ["9" "09" "009" "0" "00" "000" "16" "016" "160" "0160" "2015"])
19:37	lazybot	java.lang.NullPointerException
19:37	Seylerius	Huh.
19:37	fmzakari	justin_smith: Couldn't find a pagination example https://github.com/caribou in a sub-project
19:37	justin_smith	fmzakari: it's a huge project, I'll look real quick
19:38	fmzakari	i'm trying to think of something where your jdbc connection returns a lazy-sequence and you can (drop/take) from there i guess ?
19:39	justin_smith	fmzakari: or you can specify an offset and count with the request
19:40	justin_smith	with the query that is
19:40	fmzakari	justin_smith: right but im thinking of whether i would just plug those into my SQL query (limit offset) or apply it to the lazy-seq of the clojure list
19:41	justin_smith	the former makes more sense if possible
19:42	justin_smith	fmzakari: I took a quick look but I am not sure where that is in the various caribou projects at this point any more
19:42	fmzakari	Justin_smith: okay thnx
19:42	fmzakari	i'll try to keep browsing github. I'd like to see something neat. I'm still learning so i might not think of something very idiomatic right away
19:49	TEttinger	Seylerius:
19:50	TEttinger	&(map #(read-string (second (re-find #"^0*([0-9]+)$" %))) ["9" "09" "009" "0" "00" "000" "16" "016" "160" "0160" "2015"])
19:50	lazybot	⇒ (9 9 9 0 0 0 16 16 160 160 2015)
19:50	TEttinger	using grouping to get multiple captures
20:07	Seylerius	TEttinger: That did it, thanks.
20:07	Seylerius	(inc TEttinger)
20:07	lazybot	⇒ 61
20:13	TEttinger	woo
21:23	crocket	What is the best way to handle unix signals?
21:23	crocket	I want to handle SIGINT emitted by Ctrl+C.
21:54	crocket	If I press Ctrl+C while Thread.join() is blocking, is InterruptedException thrown?
23:10	mercwithamouth	so would you all say using Buddy is 'scary'
23:10	mercwithamouth	i'm looking over it (haven't toyed with it yet) but it seems daunting
23:57	crocket	I want to get a polymorphic behavior over a set of functions.
23:58	crocket	Should I use defprotocol and defrecord?
23:58	crocket	I don't particularly have a data structure over which to define a polymorphic behavior.
23:58	crocket	I'm writing a DDNS client.
23:58	crocket	According to DDNS provider string, I should choose an implementation.
23:58	crocket	If the DDNS provider is dnsever, I want to get dnsever-specific behaviors.
23:59	crocket	Defining an empty defrecord just to get polymorphic behaviors feels awkward.
23:59	crocket	Do you know a better abstraction?