#clojure – 2015-06-09

2015-06-09

03:20	jonathanj	how does putting a .jar on a classpath work?
03:20	jonathanj	i guess if i want to address something contained in the jar i have to use syntax like: something.jar/path/to/thing?
03:21	jonathanj	path/to/thing doesn't get merged into the classpath as though it were just a directory, i assume
03:22	jonathanj	so using Joplin, i want to call joplin/migrate-db but i need to specify a path to my migrator scripts, i'm not quite sure how to construct a path that is valid when run with `lein run` and `java -jar uberjar.jar`, any ideas?
03:32	oddcully	jonathanj: according to the GH page it will pick up resources (from classpath)
03:33	jonathanj	oddcully: hrm, my migrators are in ./joplin/sql/... and joplin is in my :source-paths vec
03:34	jonathanj	oddcully: i don't think those are then considered resources, are they?
03:35	oddcully	you might want to check, where it ends up in your target/uberjar
03:36	oddcully	i am only familiar with the java side of things here (not leiningen)
03:37	oddcully	if they end up in the jar's root joplin/sql/... i would expect them to be accessible
03:41	jonathanj	so the path on disk is something like: my_project/joplin/sql/file.clj
03:41	jonathanj	uh
03:41	jonathanj	i think it's actually something like: my_project/joplin/migrators/sql/file.clj
03:41	jonathanj	in the uberjar they end up looking like: migrators/sql/file.clj
03:42	jonathanj	but if i give the path "migrators/sql" to migrate-db then it complains about not being able to find any migrators when run as an uberjar
05:34	kungi	What is the current state of the art for using component in conjunction with compojure? I would like to reach around a DB connection as parameter to my routes for example.
05:35	justin_smith	kungi: def* macros are annoying to use with component, though I guess you could put all your defroutes inside your start method
05:35	justin_smith	is there a non-macro version of them?
05:35	kungi	justin_smith: there is (route) for that.
05:36	justin_smith	cool, so yeah, it would make sense to use that inside your start method
05:36	justin_smith	and bind your routes to the returned component
05:37	kungi	justin_smith: So you advise just building a "routes component"
05:37	justin_smith	kungi: thats how I do it (though not with compojure), I also start the http server in the same component
05:37	justin_smith	because the http server would be a very small component otherwise, and the separation gains nothing
05:38	kungi	justin_smith: I do that as well in another project but I think that code can get out of hand pretty fast and become a bit ugly.
05:38	kungi	justin_smith: I just found this idea: https://stackoverflow.com/questions/19776462/passing-state-as-parameter-to-a-ring-handler
05:38	kungi	justin_smith: Use a middleware to inject the app state int the request
05:38	justin_smith	I make a function that takes the db connections, and other stateful resources, and returns the properly wrapped routed
05:38	justin_smith	*routes
05:40	justin_smith	kungi: that makes sense if the http server is the apex of your app I guess
05:40	kungi	justin_smith: It is in my case.
05:40	justin_smith	kungi: the second option in the top answer is pretty close to what I do
05:42	justin_smith	kungi: the difference is that the http server is inside a component, so that I can cycle the whole app state - that version doesn't leave a top level of the component in global state to stop / restart
05:44	justin_smith	with the component at the top level, I retain control of the system, with the component created inside the app definition, my only option is to redef, or hope that only shutting down the http server is sufficient and nothing else is really stateful...
05:45	kungi	justin_smith: makes sense. I will wrap my routes in a function which get's the state.
06:31	kungi	justin_smith: I have to nag you again :-)
06:31	kungi	justin_smith: I created a function app-routes which takes the db and returns a bunch of routes.
06:32	kungi	justin_smith: And I created a JettyServer component
06:32	kungi	(component/using
06:32	kungi	(map->JettyServer {:options {:port 3333}
06:32	kungi	:routes-fn #'core/app-routes})
06:32	kungi	[:db])
06:32	kungi	When using my component like this the app-routes don't get updated when I reset my application.
06:43	wombawomba	I'm having some issues defining a macro.. how do I fix this? https://gist.github.com/aeriksson/072546aafcaee64c6db6
06:44	hanzo215	Can i get help on wireless settings for my thomson router
06:44	kungi	hanzo215 I think you are in the wrong channel. THis one is about clojure and clojure development.
06:44	hanzo215	oh snap, my bad :)
06:45	kungi	wombawomba: have a look at the expansion.
06:45	kungi	wombawomba: id expands to your-ns/id
06:46	kungi	wombawomba: That is why you can't use it as a parameter
06:46	kungi	wombawomba: you might want to use a gensym. That would be id#
07:30	wombawomba	kungi: thanks!
07:38	Kneiva	(inc kungi)
07:38	lazybot	⇒ 3
07:57	crocket	https://groups.google.com/forum/#!topic/clojure/PTy89Y0WDkk
07:58	crocket	Which project do I best contribute if-let-all to?
09:23	c-qjv0xfi	http://pastebin.com/ccmnjBhf
09:24	c-qjv0xfi	Is there any blaringly obvious reason this would keep throwing "Assert failed: unused keys in regular expression map
09:24	c-qjv0xfi	The URL I'm trying is /foo/bar/ABCD/1234/
09:26	pbx	c-qjv0xfi, what code is doing the assert?
09:27	pbx	the POST function i assume, but in any case that's where i think you'd need to look
09:48	afhammad	Is it possible to pass config data to a library via the host app project.clj?
09:54	schmir	afhammad: https://github.com/weavejester/environ may help
09:56	afhammad	schmir: thanks was just looking at that. What is the best approach to set a single config setting (i.e url) to be used by a test lib, instead of passing it into each function call
09:56	afhammad	schmir: thanks was just looking at that. What is the best approach to set a single config setting (i.e url) to be used by a test lib, instead of passing it into each function call, environ seems overkill
10:27	wasamasa	hmm, are there any specific idioms on the re-* functions?
10:28	wasamasa	I've only seen re-seq used heavily, probably because it's the shortest one for code golfing
10:28	justin_smith	,(apropos "^re-")
10:28	clojurebot	()
10:29	wasamasa	lol
10:29	justin_smith	,(apropos "^re-.*")
10:29	clojurebot	()
10:29	justin_smith	,(apropos #"^re-.*")
10:29	clojurebot	(clojure.core/re-find clojure.core/re-groups clojure.core/re-matcher clojure.core/re-matches clojure.core/re-pattern ...)
10:29	justin_smith	finally!
10:29	dnolen	Bronsa: hrm trying to read cljs.analyzer, it looks cljs.tools.reader dropped alias-map how are namespaced keywords supposed to get resolved?
10:29	justin_smith	wasamasa: anyway, they all do distinct things, use the one that concisely does the operation you require?
10:29	Duke-	wasamasa: Joy of Clojure recommends only using re-seq
10:30	wasamasa	Duke-: does it name any specific reason for that?
10:30	Duke-	yes, the other functions expose some mutable stuff I think
10:30	Duke-	and re-seq wraps everything nicely
10:31	wasamasa	hmk
10:32	justin_smith	,(clojure.string/join " " (map name (apropos #"^re-")))
10:32	clojurebot	"re-find re-groups re-matcher re-matches re-pattern re-seq re-quote-replacement"
10:33	Bronsa	dnolen: oh, uhm. currently there's no support for ::foo at all but I guess with alias-map we could support at least ::foo/bar
10:33	justin_smith	out of those, re-pattern, re-matcher, re-quote-replacement and re-groups are of a different category altogether
10:34	dnolen	Bronsa: yeah w/o that can't really read any of the ClojureScript .cljc files
10:34	justin_smith	which leaves re-find if you want the first match, re-matches if you want a boolean, and re-seq if you want a lazy-seq of matches
10:36	wasamasa	but isn't re-matches on the whole string and re-find only on substrings?
10:37	justin_smith	wasamasa: actuall yeah, you're right
10:37	dnolen	Bronsa: it needs more thought but I think I will add `ns` dyn-var just to support the bootstrapping use case. Will just be a bound to a map. Also `ns-aliases` will be present.
10:38	Bronsa	dnolen: that would be nice. if we could also have a ns-interns we could support all of the auto-qualifying features
10:40	Bronsa	actually we'd need ns-interns and ns-map
10:40	Bronsa	dnolen: could just be a set of symbols, no need for a map sym->Var like in clojure
10:41	Bronsa	in the meantime I'm re-adding alias-map and ::foo/bar support
10:42	dnolen	Bronsa: yeah I don't know about that set of symbol, anything that requires adding a whole bunch of runtime information is undesirable.
10:43	dnolen	would have to add a bunch of runtime bookkeeping.
10:43	dnolen	Bronsa: as I suggested earlier all this information is already present in the JS environment.
10:43	dnolen	I think all you need is a table of namespaces identifying which paths in the global environment represent namespaces
10:44	dnolen	resolve, ns-interns can all use this
10:45	Bronsa	dnolen: couldn't cljs.core/ns-map just perform the necessary reflective calls into the js env rather than using a runtime map then?
10:46	dnolen	Bronsa: you mean to add `ns-map`? `ns-map` isn't a thing right now.
10:46	dnolen	reflecting on the js env isn't going to work
10:46	Bronsa	dnolen: yeah, to add it
10:46	dnolen	you'd have to walk a bunch of things that don't matter
10:47	dnolen	think browser
10:47	dnolen	like a complete walk
10:47	dnolen	you need a table of paths that represent namespaces
10:47	dnolen	then no walking, except to collect vars
10:47	Bronsa	ah, gotcha
10:48	dnolen	Bronsa: k I think I have a simple plan. Will ping you when it's in place :)
10:49	Bronsa	cool thanks
10:50	stain	is there a trick to forward a future to a promise without starting another future?
10:50	stain	(and not block)
10:54	justin_smith	stain: what does "forward a future to a promise" mean?
10:54	justin_smith	stain: you may be thinking of a definition of future and/or promise that doesn't match clojure on the jvm
10:55	justin_smith	,(future? (promise))
10:55	clojurebot	false
10:55	stain	justin_smith: I've made a (future) that depends on incoming (promise) -- and then I want to the result of that future to be delivered to other (promises)
10:56	stain	so perhaps I can make my future simply do (deref (deref that-promise)) or something silly
10:56	stain	I won't know inside the future body where to deliver it to
10:56	justin_smith	stain: oh, you are delivering a future to a promise?
10:56	stain	right
10:56	stain	they are kind of chained together
10:56	stain	well, they should be
10:57	stain	https://github.com/stain/flowing-clj/blob/master/src/flowing/core.clj#L14
10:57	stain	now I have to implement the linking
10:57	justin_smith	wait, you shouldn't be able to apply fn
10:57	justin_smith	oh, never mind, macro
10:57	justin_smith	silly me
10:58	stain	yeah, so it will deref inside the future
10:58	stain	and not block outside
10:58	stain	https://github.com/stain/flowing-clj/blob/master/test/flowing/core_test.clj if you are interested
11:00	justin_smith	stain: so what is the functionality being implemented here?
11:00	stain	justin_smith: see the test
11:00	stain	you define a series of steps
11:01	stain	then wire them together to provide the parameters from other steps (or outside values)
11:01	justin_smith	I saw the test and lack the imagination to see a situation where I would want to do that
11:01	stain	it's to have easier flexibility about the wiring
11:01	stain	in scientific data analysis for instance
11:01	justin_smith	oh, so the kind of thing prismatic/plumbing does?
11:02	justin_smith	or maybe that was prismatic/graph
11:02	justin_smith	or both
11:02	stain	I think so
11:02	stain	but I'm trying to stay close to the computational model of Apache Taverna, as I will plug this in as an alternative workflow engine
11:03	stain	thanks for the links
11:04	justin_smith	n/p, I hope that provides some help, because at this point I really don't understand enough about what your code is trying to do to provide much input - maybe someone else could grok it though
11:07	stain	justin_smith: thanks for your help :)
11:08	stain	should be easier if I wrote some documentation
11:09	stain	I added a deref-deep function
11:09	stain	so then I can do
11:09	stain	(defn deref-deep [ref]
11:09	stain	(loop [ref]
11:09	stain	(if (not (ref? ref)) ref
11:09	stain	sorry
11:09	stain	then I can do (deliver (:a step) (future "double-ref!"))
11:09	justin_smith	stain: the future returns the promise?
11:10	kungi	Can someone please have a look at this gist and help me find out what I am doing wrong: https://gist.github.com/Kungi/beaed8b0bea16beb8ce6 When I change my routes in routes.clj and (reset) the whole system the routes don't change. Somewhere must be a reference to the old routes.
11:10	stain	justin_smith: no, I deliver the future to the promise
11:10	stain	and then inside the future I call (deref) twice, if needed
11:10	justin_smith	never mind, that still wouldn't work - if the future returned a promise you could do (deliver (:a step) @(future ...))
11:11	stain	but then the delivery would block
11:11	justin_smith	oh, the promise is the first val, never mind
11:11	stain	and I would need another future
11:35	kaffeeboehnchen	I remember a site where one could learn clojure interacitvly with ranking and stuff. I just dont remember the url. Any ideas? :D
11:35	wink	4clojure?
11:35	clojurebot	4clojure is the place to go for Clojure exercises
11:35	kaffeeboehnchen	ah yeah, thanks
11:42	Shayanjm	I need to split my application into two components, a "generator" component (generates a huge vector that needs to be fed to workers), and a "worker" component (does stuff with the data it's fed)
11:43	Shayanjm	How do I go about building two different jars when I run lein uberjar?
11:43	dstockton	Shayanjm: split them into separate projects perhaps
11:44	Shayanjm	dstockton: since they're so tightly coupled, i'd love to be able to build them both in one go
11:44	justin_smith	Shayanjm: another option is one uberjar - you can choose when invoking a jar which class is run as main
11:44	Shayanjm	justin_smith: I considered that, but my hesitation is that the jar loads a lot of stuff as of right now
11:44	dstockton	http://stackoverflow.com/questions/19334454/create-multiple-uberjars-in-leiningen
11:45	Shayanjm	which would introduce some non-trivial overhead for worker spin-up time
11:45	justin_smith	so for one case you run java -cp my.jar clojure.main -m my.core1, in another you could run java -cp my.jar clojure.main -m my.core2
11:45	justin_smith	Shayanjm: oh, OK
11:45	schmir	Shayanjm: https://github.com/zcaudate/lein-repack
11:46	Shayanjm	looking schmir
11:46	Shayanjm	oh interesting
11:46	justin_smith	Shayanjm: so in order to not include all the deps, you would have different :dependency vector per uberjar profile?
11:46	Shayanjm	justin_smith: Yeah preferably
11:47	justin_smith	err, I mean :dependencies of course
11:47	Shayanjm	I saw something about using profiles and building via lein with-profile x1:x2:x3 uberjar
11:47	Shayanjm	but i didn't see anything about splitting the deps
11:58	justin_smith	Shayanjm: what about separate project.cljs in one repo with overlapped :source-paths as apropriate?
11:59	Shayanjm	justin_smith: that sounds interesting. Anywhere I can read about proper :source-path use?
11:59	Shayanjm	i'm not even seeing it in my currently project.clj
11:59	justin_smith	Shayanjm: https://github.com/technomancy/leiningen/blob/master/sample.project.clj#L278
12:00	Shayanjm	thanks justin_smith
12:00	Shayanjm	Oh wow
12:00	Shayanjm	i didn't even know this existed
12:00	Shayanjm	this is excellent
12:01	wei	Shayanjm: you could also try looking into boot, it offers more flexibility with “non-standard” builds
12:01	Shayanjm	how do you select the different project.clj's in a single repo justin_smith?
12:01	Shayanjm	i.e: how do I tell lein which project.clj i'm looking at?
12:01	Shayanjm	wei: will definitely look into it. Boot is just another build tool, right?
12:01	wei	yup
12:02	justin_smith	Shayanjm: my approach would be to have subdirectories with the different project.clj files, and use "../src" etc. in the source-paths
12:02	Shayanjm	Gotcha that makes sense
12:03	justin_smith	Shayanjm: bonus, each one would have its own target dir isolated from the others
12:03	Shayanjm	that sounds like an ideal situation actually
12:03	justin_smith	the negative is managing multiple project files, but that may not be so bad depending
12:03	wink	I'd also never thought of this. brilliant :P
12:03	Shayanjm	For the most part, the project files will be set-and-forget
12:04	Shayanjm	distributed computing is hard to architect locally :\
12:04	Shayanjm	I guess most people don't do hacky distributed computing with Clojure. Seems like most of the literature floating around is all about hadoop/spark integrations
12:05	justin_smith	Shayanjm: I assume you have looked at sorenmacbeth 's stuff like flambo and marcellene?
12:05	justin_smith	*marceline
12:05	Shayanjm	justin_smith: Yeah I did. I watched his talk too
12:05	wink	is there even non-hacky distributed anything? anywhere?
12:05	Shayanjm	Awesome stuff
12:05	Shayanjm	the issue is that we're primarily a python shop
12:06	Shayanjm	so our current distribution pipeline is python-based, so I'll have to write the hypervisor in python
12:06	justin_smith	wink: bitcoin?
12:06	justin_smith	dunno, maybe that's hacky
12:06	justin_smith	the Internet
12:06	wink	justin_smith: hm, it's eventually consistent, but definitely not fast :P
12:06	Shayanjm	which makes deploying a bit of a weird thing since it's a non-JVM tool, I'll have to spin everything up and handle everything pretty much manually
12:07	wink	I'm just sayin, for a majority (I think) of people real distributed stuff is just too hard
12:07	Shayanjm	so I don't know how people 'usually' architect their distributed projects
12:07	Shayanjm	wink: Yeah, most people don't need distribution
12:07	wink	it makes going from solving a problem a day.. to thinlking for 2 weeks
12:07	Shayanjm	but for those that do, they usually just jump on the hadoop bandwagon
12:07	wink	thinking isn't bad... but it's really opening a different can of worms
12:08	wink	monoliths can be so nice to work with :)
12:08	Shayanjm	lol, the current code base is hella monolithic
12:08	Shayanjm	https://github.com/ableeng/hexpacker
12:09	Shayanjm	But doing 1m queries on a single box is suicide
13:42	irctc	would anyone be willing to look at my code on codereview and give me some feedback? I'm worried everything I'm doing is not idiomatic.
13:42	irctc	http://codereview.stackexchange.com/questions/93051/structure-of-parser-in-clojure
13:44	irctc	(I once looked at some python code that doubled every item in a list using a while loop and i+=1, which is SO NOT pythonic. Just worried I might be making some similar errors with my first foray into clojure)
13:54	hyPiRion	irctc: One would generally prefer keywords over symbols, and vectors over lists. So it's more common to see something that looks like {:shared [[:record-type 2] [:entering-firm 4] ...] :1A [[:filler 9] [:poss-dupe 1] ...]}
13:56	pandeiro	using ring-defaults' wrap-defaults, shouldn't setting {:session nil} within a response map delete browser cookies as well?
13:58	irctc	hyPiRion: and then have a second hash map linking the keys to the functions? The need for that extra dictionary was what prevented me from using keywords or plain strings in the first place.
14:01	hyPiRion	irctc: I've only skimmed the source, but if the symbols are there for evaling stuff, then yes, definitely. It's very uncommon to use eval in the first place (although it's warranted in some cases)
14:04	bensu	irctc, ask if you have any questions on the feedback.
14:09	amalloy	irctc: i agree with hyPiRion. it wasn't totally clear to me until i was already done writing up my review why all your names were funky and what you're using eval for, but hyPiRion's suggestion is the right one to get rid of that nonsense, and make explicit the implicit mappings you're currently using
14:11	eraserhd	gfredericks: AFAICT, there's no way to conditionally call a generator. Is that right? If not, I'm missing something super-obvious.
14:14	gfredericks	eraserhd: depends on what the condition is; bind could do that
14:14	gfredericks	if you describe the use case better I could tell if that's the best approach
14:14	eraserhd	I mean, I could call (gen/vector conditional-generator (if (= other-generated-name some-value) 1 0))
14:15	eraserhd	I'm generating events (maps). The event types are keywords (generated using gen/elements). I then generate the other fields, some are only present in some maps.
14:15	amalloy	eraserhd: so you need bind, indeed
14:16	amalloy	or, well, maybe you can use fmap
14:16	eraserhd	fmap always generates. I realized that I forgot what bind actually does, so I'm looking it up.
14:17	amalloy	(gen/vector (bind conditional-generator (fn [the-map] (if (make-whatever? the-map) (make-whatever the-map) the-map))))
14:17	amalloy	or, well, i guess that is missing some returns. i am just slapping together stuff that is not very helpful. listen to gfredericks
14:20	gfredericks	eraserhd: if you used fmap it'd probably be that you're generating all possible fields, then use fmap to remove the ones that don't apply to the event type
14:20	gfredericks	which could be more elegant if your event types have overlapping fields
14:21	gfredericks	another option is instead of gen/elements use gen/one-of and have a generator for each event type, that generates the full map for that type
14:21	eraserhd	That actually sounds pretty nice.
14:23	gfredericks	~test.check actually sounds pretty nice
14:23	clojurebot	It's greek to me.
14:24	gfredericks	~test.check \|actually sounds\| pretty nice
14:24	clojurebot	Roger.
14:25	eraserhd	I've noticed that my cases seem exponential. This kind of makes sense. E.g. 25 cases take 25 seconds, 30 take 35, I've never seen 125 complete. This is probably not a way to resolve :)
14:27	gfredericks	well
14:27	gfredericks	that kind of means you've set up your generators so they can't tolerate a size up to 125
14:28	gfredericks	which you can handle three ways
14:28	gfredericks	A) it doesn't matter I'll just only run my tests with n=30
14:28	gfredericks	B) I want to be able to run with more test cases so I'll cap the size at the generator level
14:29	gfredericks	C) I'll figure out how to rewrite the generators at a lower level so they don't get too big
14:29	gfredericks	D) does defspec have an option for max-size? maybe it could
14:29	gfredericks	E) that's four ways, or 3.5 maybe, but not 3
14:31	gfredericks	version 0.8.0-alpha3 has a new gen/generate function that can make it easy to explore how large things get at different sizes
14:32	hyPiRion	gfredericks: D is a suggestion I've put up on jira
14:33	gfredericks	will probably tackle that while re-vamping the API for the quick-check function
14:33	justin_smith	gfredericks: a funny number problem http://www.ericharshbarger.org/dice/go_first_dice.html
14:34	hyPiRion	yeah, http://dev.clojure.org/jira/browse/TCHECK-10 it is
14:35	gfredericks	justin_smith: sweet
14:35	gfredericks	hyPiRion: yeah I expect some way to pass arbitrary args to quick-check should be included
14:40	Shayanjm	justin_smith: do I need to have a :gen-class for both namespaces I intend to generate jars for?
14:41	Shayanjm	I don't think I've fully grok'd what gen-class actually does...
14:41	justin_smith	Shayanjm: if you use java -cp my.jar clojure.main -m my-ns.core you don't need :gen-class at all
14:42	justin_smith	Shayanjm: it creates a class that a java process knows how to invoke, usually used in order to have an invokable main method
14:42	Shayanjm	gotcha
14:42	Shayanjm	so if I have :gen-class in there I don't need to specify an entrypoint when I execute my jar?
14:42	Shayanjm	i.e: namespace.gen and namespace.work become gen.jar and work.jar
14:42	Shayanjm	each have their own -main's
14:43	Shayanjm	I've just been doing java -jar my.jar to execute (my namespace.core is being split to namespace.gen & namespace.work. namespace.core currently has :gen-class)
14:43	justin_smith	Shayanjm: well, that route involves setting your :main-ns and having :gen-class and setting up your :aot field in project.clj
14:43	Shayanjm	that sounds dirty
14:44	Shayanjm	I'll just kill the :gen-class's. Will that fuck anything up re: uberjaring?
14:44	Shayanjm	I think I'm still using the boilerplate uberjar setup in my project.clj
14:44	justin_smith	Shayanjm: only that you'll need a command line arg specifying the main ns for clojure to invoke
14:44	Shayanjm	kk
14:45	justin_smith	which is a small hassle in my experience, compared to the complexity an otherwise unneeded gen-class can create
14:45	Shayanjm	True that
15:11	tahmid	Hello! I need some help with immutant 2
15:11	tahmid	I am handling webscoket request
15:11	tahmid	Immutant provides nice callbacks like :on-message :on-open and :on-close
15:12	tahmid	But what should I do If I want to send a message to a websocket without those callbacks
15:12	tahmid	I mean arbitrarily , without any event happening
15:15	gws	tahmid: if you don't get help here, you may have a better shot asking in #immutant
15:16	justin_smith	tahmid: with sente it's just a question of having a handle to send-fn and having the unique ID of the client you wish to send to
15:16	justin_smith	tahmid: and you can use sente with immutant
15:16	justin_smith	https://github.com/ptaoussanis/sente
15:17	tahmid	I looked at sente, it seemed a bit daunting
15:17	tahmid	I will give it a try
15:17	justin_smith	tahmid: it's not that bad in my experience. The key is that you need to hook up its handler functions to your http server, and then when you initialize it it will provide you with the send-fn that will send to a client
15:19	tahmid	justin_smith: I am storinng the channels that I get from ring request in a vector.
15:19	justin_smith	oh, if you already have that you can use those, right?
15:21	Seylerius	Can keywords have a colon in them, later in the keyword? Like ":Foo:bar" and "Foo:baz"?
15:21	tahmid	justin_smith: printing the vector that contains the channels giving me this [#object[org.projectodd.wunderboss.web.async.websocket.UndertowWebsocketChannel 0x79aa8b3d org.projectodd.wunderboss.web.async.websocket.UndertowWebsocketChannel@79aa8b3d] #object[org.projectodd.wunderboss.web.async.websocket.UndertowWebsocketChannel 0x67435a65 org.projectodd.wunderboss.web.async.websocket.UndertowWebsocketChannel@67435a65]]
15:22	Seylerius	tahmid: Dude, paste that shit somewhere.
15:22	tahmid	Sorry
15:22	Seylerius	sprunge.us or ix.io is a good idea.
15:23	amalloy	if it's just a single long message it's not a big deal, really. the problem is when people paste 15 lines as 15 separate short messages
15:24	Seylerius	amalloy: Fair point.
15:25	Seylerius	Hmm... Quick and dirty way to invert a map of sets? I need a map where the keys are the items from the sets, and the values are sets of which keys contained the key.
15:26	amalloy	Seylerius: https://github.com/flatland/useful/blob/develop/src/flatland/useful/map.clj#L234 ?
15:26	Seylerius	Basically, I need to turn {:Foo #{:Bar :Baz} :Flib #{:Bar :Box}} into {:Bar #{:Foo :Flib} :Baz #{:Foo} :Box #{:Flib}}
15:26	Seylerius	Taking a look at that now, thanks amalloy.
15:27	amalloy	if you wanted to use it without pulling in useful, you could remove the code that supports {x 1 y #{2}}
15:28	amalloy	at which point it's just (apply merge-with into {} (for [[k vs] m, v vs] {v #{k}}))
15:28	amalloy	,(let [m '{:Foo #{:Bar :Baz} :Flib #{:Bar :Box}}] (apply merge-with into {} (for [[k vs] m, v vs] {v #{k}})))
15:28	clojurebot	{:Baz #{:Foo}, :Bar #{:Flib :Foo}, :Box #{:Flib}}
15:29	H4ns	if i have a lazy seq bound to a variable and then traverse it while still keeping a reference to the head, will that cause the whole sequence to be realized? or can i safely keep a reference to the head and traverse it two times?
15:29	justin_smith	,(into {} (for [[k vs] {:a #{1 3 5} :b #{7 9}}, v vs] [v #{k}]))
15:29	clojurebot	{1 #{:a}, 3 #{:a}, 5 #{:a}, 7 #{:b}, 9 #{:b}}
15:30	justin_smith	^ my golf of that
15:30	amalloy	justin_smith: a totally incorrect golf...?
15:30	justin_smith	incorrect?
15:30	amalloy	try it on the input originally requested
15:31	justin_smith	amalloy: oh, I missed a constraint, OK
15:31	amalloy	H4ns: you will realize it all
15:32	Seylerius	amalloy: That's great, just tried it.
15:32	Seylerius	Works perfectly.
15:32	Seylerius	(inc amalloy)
15:32	lazybot	⇒ 277
15:32	H4ns	amalloy: ok, i kind of suspected that without really understanding why
15:33	justin_smith	H4ns: the locals-clearing or gc cannot reclaim memory when you have a handle to it, the head of the list counts as a handle to the rest after it
15:35	H4ns	justin_smith: ok - so i basically want to avoid binding large lazy sequences to variables.
15:35	justin_smith	H4ns: right, or make sure those variables go out of scope
15:35	H4ns	justin_smith: thanks!
15:36	justin_smith	eg. (let [nums (range)] (foo nums)) is fine as long as foo does not return nums as part of its result
15:36	justin_smith	because locals-clearing knows that nums can't escape otherwise
15:39	m1dnight_	https://www.refheap.com/102345 <- can anyone give me any clue where to start looking? A stackoverflow
15:40	m1dnight_	but I dont get an origin from within my own code.. :<
15:41	justin_smith	stack overflow while printing a sequential, makes me wonder if there are recursive concat calls somewhere?
15:42	m1dnight_	oh there are
15:42	justin_smith	or a collection that contains itself...
15:42	m1dnight_	oh
15:42	m1dnight_	!
15:42	m1dnight_	that gave it away
15:42	m1dnight_	i think
15:42	m1dnight_	to the debugcopter
15:42	m1dnight_	justin_smith++
15:42	m1dnight_	(inc justin_smith)
15:42	lazybot	⇒ 262
15:42	m1dnight_	okay :p
15:43	justin_smith	(inc palindromes)
15:43	lazybot	⇒ 2
15:43	Shayanjm	justin_smith: I'm blanking on this project.clj. Just sorta divorced the gen/worker stuff from the existing core
15:44	Shayanjm	now need to rewrite the project.clj's for both gen & worker
15:44	Shayanjm	unsure how overlapping :source-path's help with dependency isolation?
15:44	justin_smith	Shayanjm: well, of course they wouldn't overlap entirely
15:44	justin_smith	for that to help
15:45	justin_smith	but if you can't isolate like that, then you don't gain anything by having separate uberjars either
15:45	Shayanjm	Maybe i'm unclear on :source-path itself. In all examples I see it points to src/clojure - so I'm assuming it's just pointing to clojure itself?
15:45	Shayanjm	err, src/main/clojure or something
15:45	justin_smith	Shayanjm: the default binding is "src" which is the directory under which we have our clojure src
15:45	Shayanjm	gotcha
15:45	Shayanjm	ahhhhh
15:46	justin_smith	and src/main/clojure as the second entry
15:46	Shayanjm	okay that makes way more sense
15:46	justin_smith	so you might hav something like src/common/ src/app1 src/app2
15:46	justin_smith	whatever makes sense for your case
15:46	Shayanjm	Right, perfect. And in each project.clj I can define separate deps
15:46	justin_smith	though do take a moment to verify it wouldn't be simpler to just have two totally independent repos
15:46	justin_smith	Shayanjm: right
15:47	Shayanjm	so in order to uberjar, i'd have to cd into the subdirectory which has each project.clj and lein uberjar?
15:47	justin_smith	right
15:47	Shayanjm	Okay great, just making sure I'm not overlooking some lein magic
15:47	m1dnight_	justin_smith: indeed. I had a an atom that contained itself
15:48	justin_smith	m1dnight_: yeah, that would do it
15:48	m1dnight_	by luck I printed some variable and its enormous :>
15:48	gfredericks	,(let [a (atom nil)] (reset! a a))
15:48	clojurebot	#object[clojure.lang.Atom 0x3460a511 {:status :ready, :val #object[clojure.lang.Atom 0x3460a511 {:status :ready, :val #object[clojure.lang.Atom 0x3460a511 {:status :ready, :val #object[clojure.lang.Atom 0x3460a511 {:status :ready, :val #object[clojure.lang.Atom 0x3460a511 {:status :ready, :val #object[clojure.lang.Atom 0x3460a511 {:status :ready, :val #object[clojure.lang.Atom 0x3460a511 {:status ...
15:48	Bronsa	it's not as fun anymore :<
15:48	justin_smith	m1dnight_: my preferred way to deal with this sort of thing is an adjacency-list representation - it allows arbitrary cycles in the data without any recursion in the structure itself
15:49	justin_smith	at the cost of one layer of indirection
15:50	justin_smith	m1dnight_: because, of course, sometimes your data really is a graph and not a tree
16:01	oddcully	given, that vim-fireplace calls piggieback like this (cemerick.piggieback/cljs-repl'.arg.'); is there any vile trickery to write `arg` that only `arg` gets executed?
16:04	m1dnight_	I think im closing in
16:05	m1dnight_	but I have a question, if I have macros that expand a single line (the macro call) to say, 10 lines, do the line numbers in stacktraces and such match the actual lines, or the expanded lines?
16:05	m1dnight_	Im guessing the latter?
16:10	justin_smith	m1dnight_: I recall various bugs regarding this line numbering behavior
16:13	m1dnight_	Well, I have pinpointed (some what) the problem; I print a message (map) and that contains a cycle somewhere
16:13	clojurebot	Excuse me?
16:14	justin_smith	m1dnight_: right, my suggestion was that an adjacency-list representation allows arbitrary
16:14	justin_smith	"nesting" in a flat one level structure
16:15	justin_smith	or if the nesting isn't needed, just not having it is a simple fix too :)
16:18	m1dnight_	Well, I predicted this issue, and I wrapped the entire concat in a (set ..) but that doesnt seem to fix it
16:18	m1dnight_	so Im guessing I dont have the exact cause yet.
16:42	zot	when using prismatic schema, is there a way to concisely say, (s/either #{Foo} [Foo] '(Foo)) to cover the basic grounds for all things seqable?
16:44	anthgur	zot: what about pred? http://prismatic.github.io/schema/schema.core.html#var-pred
16:45	zot	that's what i was just writing up as the more verbose alternative. wondered if i missed some other better idea...
16:46	m1dnight_	I'm trying to debug my project with IntelliJ/Cursive but I get the error: "Exception in thread "main" java.lang.ClassNotFoundException: actransors.stm.RetryEx"
16:46	m1dnight_	That is a custom exception I implemented and has genclass, but it works fine in leiningen.
16:47	m1dnight_	Im not running the project as lein in intellij btw. I just put (-main) in my core.clj file and then "run core"
16:47	justin_smith	m1dnight_: are you requiring the namespace inside cursive that would create that class?
16:47	m1dnight_	Yes, I am
16:48	m1dnight_	And also importing it
16:48	m1dnight_	https://www.refheap.com/102355
16:51	m1dnight_	Its odd that it works fine in leiningen though.
16:53	canweriotnow	Anybody up for a slightly insane question about string/json parsing?
16:53	amalloy	~anyone
16:53	clojurebot	anyone is anybody
16:53	justin_smith	canweriotnow: in general, just go ahead and ask
16:53	amalloy	argh
16:54	canweriotnow	lol clojurebot
16:54	amalloy	i wish i knew how he was inferring that so i could remove it
16:55	canweriotnow	So, I'm looking at core.match, prismatic schema, doing a prewalk... too mnay options. I have some insane json, thus: https://gist.github.com/canweriotnow/56f737784db1d2bd293f
16:56	canweriotnow	My issue is that I have keys like "[question(n)]" for each n (question number).
16:56	justin_smith	canweriotnow: what are you trying to do with this json?
16:56	canweriotnow	I need to correlate the question numbers (among other things) from this response data to the questions themselves, for which I have id's.
16:57	justin_smith	sounds like a json parse (I like cheshire) plus a map-kv, plus a regex and a group-by
16:57	justin_smith	something like that
16:58	canweriotnow	What I'd like is to restructure into a map like {:question {:4 "Drifter"}} instead of the flat "[question(4)]":"Drifter"
16:58	justin_smith	yeah, that's where the group-by comes in
16:58	justin_smith	but before that you need to do some parsing with regex
16:58	justin_smith	and :4 won't work
16:58	justin_smith	but 4 will
16:59	canweriotnow	The best I've done to make it usable is to give cheshire a keyfn that strips the \W chars, so I get :question4 "Drifter"
16:59	justin_smith	canweriotnow: that's where map-kv comes in - you can call a function on the keys to transform them
16:59	canweriotnow	So you think maybe multiple capture groups to grab (question) and (4) and then use group-by?
16:59	justin_smith	right
17:00	canweriotnow	Oh! I forgot map-kv!
17:00	justin_smith	and probably some update-in in a reduce
17:00	justin_smith	canweriotnow: sorry, not map-kv, I meant reduce-kv
17:00	canweriotnow	justin_smith: right, gotcha
17:01	canweriotnow	justin_smith: This gives me a great place to start, thanks so much.
17:04	justin_smith	,(reduce-kv (fn [m k v] (let [[_ a b] (re-matches #"([a-z])([0-9])" k)] (assoc-in m [a b] v))) {} {"abc12" :a "abc13" :b "abd42" :c}) ; canweriotnow
17:04	clojurebot	{"abc" {"12" :a, "13" :b}, "abd" {"42" :c}}
17:04	justin_smith	clojure is an excellent language for this sort of insanity
17:05	m1dnight_	Can one force clojure to print an atom in a particular way?
17:06	m1dnight_	Im trying to debug using print statements but the datastructure is just way too massive to pick it out by hand
17:06	justin_smith	m1dnight_: my preferred technique is to bind the thing, then use (-> ...) plus the up-arrow keys to drill down into it
17:06	justin_smith	(in the repl of course)
17:12	cfleming	m1dnight_: WRT your gen-class issue, you need to tell Cursive to compile your namespace, under Settings->Build etc->Compiler->Clojure
17:19	canweriotnow	justin_smith: that's perfect. Clojure is excellent for many kinds of insanity :)
17:59	justin_smith	from our friends at circleci (built in clojure / cljs) - this blog post is hilarious http://blog.circleci.com/its-the-future/
18:00	jarjar_prime	which profile does "lein release" load?
18:01	m1dnight_	cfleming: thanks. that was what I was looking for.
18:01	m1dnight_	(inc cfleming)
18:01	lazybot	⇒ 16
18:01	m1dnight_	btw justin_smith fwiw, I found the error. Im using code from my professor and he simply creates circular maps. he just never prints them and that way it works..
18:02	m1dnight_	so I see a nice PR coming up :>
18:02	m1dnight_	after my thesis
18:03	jarjar_prime	uberjar has its own profile
18:04	justin_smith	m1dnight_: ahh - so I stand by my initial proposal, that with clojure you are better off using an adjacency list rather than a circular map
18:08	m1dnight_	Im not clear exactly on what you mean by that. Ive googled a bit and isn't a map an adjacency list?
18:09	devth_	,(= false)
18:09	justin_smith	an adjacency list can be represented by a pair of maps
18:09	clojurebot	true
18:09	devth_	,(= nil)
18:09	clojurebot	true
18:09	devth_	what's the deal w/ that
18:09	justin_smith	,(= Double/NaN)
18:09	clojurebot	true
18:10	m1dnight_	reflexivity devth
18:10	m1dnight_	no wait
18:10	m1dnight_	well, that X is equal to X
18:11	m1dnight_	yes, reflexivity
18:11	justin_smith	m1dnight_: the idea with an adjacency list is that all the keys (in both maps) are your nodes. One map is nodes to values, the other is nodes to edges, each node having edges being a set of keys for nodes you have outgoing connections to
18:11	justin_smith	m1dnight_: not quite because of Double/NaN, but kind of
18:11	devth	there must be a use? why is = even defined for a single arg?
18:11	justin_smith	devth: because we like to use apply to call a function on all the elements of a list as the args
18:11	justin_smith	,(apply = ())
18:11	clojurebot	#error {\n :cause "Wrong number of args (0) passed to: core/="\n :via\n [{:type clojure.lang.ArityException\n :message "Wrong number of args (0) passed to: core/="\n :at [clojure.lang.AFn throwArity "AFn.java" 429]}]\n :trace\n [[clojure.lang.AFn throwArity "AFn.java" 429]\n [clojure.lang.RestFn invoke "RestFn.java" 399]\n [clojure.lang.AFn applyToHelper "AFn.java" 152]\n [clojure.lang.Rest...
18:12	justin_smith	,(apply = '(Double/NaN))
18:12	clojurebot	true
18:12	justin_smith	it's not fully consistent, but it at least has a flimsy rationale
18:12	devth	i see.
18:12	justin_smith	,(apply = [1 1])
18:12	clojurebot	true
18:12	justin_smith	,(apply = [1 2])
18:12	clojurebot	false
18:16	m1dnight_	doesnt (=) make sense that it errors?
18:16	jarjar_prime	(inc clojurebot)
18:16	lazybot	⇒ 53
18:16	m1dnight_	,(=)
18:16	jarjar_prime	:-D
18:16	clojurebot	#error {\n :cause "Wrong number of args (0) passed to: core/="\n :via\n [{:type clojure.lang.ArityException\n :message "Wrong number of args (0) passed to: core/="\n :at [clojure.lang.AFn throwArity "AFn.java" 429]}]\n :trace\n [[clojure.lang.AFn throwArity "AFn.java" 429]\n [clojure.lang.RestFn invoke "RestFn.java" 399]\n [sandbox$eval193 invoke "NO_SOURCE_FILE" 0]\n [clojure.lang.Compiler...
18:17	m1dnight_	,(+)
18:17	clojurebot	0
18:17	justin_smith	m1dnight_: more sense than (= Double/NaN) not being an error (or at least false)
18:17	m1dnight_	oh, odd
18:17	justin_smith	,(*)
18:17	clojurebot	1
18:17	jarjar_prime	m1dnight_: what does , mean?
18:17	m1dnight_	well, thats needed for reducing and such I assume
18:17	justin_smith	,(= Double/NaN)
18:17	clojurebot	true
18:17	m1dnight_	jarjar_prime: you type ,<sexp> to evaluate it
18:17	justin_smith	,(= Double/NaN Double/NaN)
18:17	clojurebot	false
18:18	m1dnight_	because a double is a reference type so thats normal too
18:18	justin_smith	m1dnight_: read it again
18:18	justin_smith	it's not equal to itself, that's the spec
18:18	m1dnight_	oh
18:19	justin_smith	but = is short-circuited to always return true if it has one arg
18:20	Bronsa	justin_smith: how could it behave in any differnt way?
18:20	Bronsa	there's no way to make (= x) return false IFF x is NaN
18:20	Bronsa	I think?
18:21	Bronsa	no nevermind, there's Double/isNaN
18:21	justin_smith	Bronsa: it's more of a silly thing to me, it's very unlikely to lead to bugs
18:22	Bronsa	justin_smith: I've lost my sleep because of sillier things
18:22	justin_smith	I'm sorry to hear that
18:22	andyf_	Bronsa: So, a JIRA ticket and patch are forthcoming, then? :-)
18:22	clojurebot	Gabh mo leithscéal?
18:22	Bronsa	andyf_: that's justin_smith's pet peeve, not mine :P
18:22	andyf_	(completely, 100% joking there)
18:30	Bronsa	dnolen: do you have a way to make hudson run the cljs tests on the core.match/core.logic port?
18:30	dnolen	Bronsa: nope, need to sort that out with puredanger at some point
18:30	dnolen	likely via Node.js or something
18:31	Bronsa	ok
18:31	dnolen	Nashorn still seems too unstable to depend on
18:32	justin_smith	feeling a bit better about my own cljs test automation woes right now...
18:38	puredanger	We should probably use docker coreos etcd and kubernetes right dnolen
18:38	dnolen	lol
18:42	jarjar_prime	there doesn't seem to be a way to specify a profile for :release-tasks huh?
18:42	jarjar_prime	["deploy"] gets called with no profile set it seems
18:45	jarjar_prime	seems some projects are getting around it by using uberjars
18:45	jarjar_prime	but I am trying to avoid sending a fat jar to artifactory
18:48	jarjar_prime	"lein with-profile docker deploy" works
18:48	jarjar_prime	but "lein with-profile docker release" doesn't
18:49	jarjar_prime	is there another profile that release uses?
18:49	justin_smith	jarjar_prime: I'm not sure about this stuff, but one thing that might help is "with profile +foo" which adds the profile, rather than replacing
18:51	jarjar_prime	justin_smith: thanks, but it appears release is stripping that away too :(
18:55	stain	justin_smith: https://github.com/stain/flowing-clj -- perhaps easier to explain now that it works :)
19:04	stain	TEttinger2: I did the workflow thing we discussed yesterday, have a look at https://github.com/stain/flowing-clj -- pretty basic so far (can only run the workflow once!)
19:04	stain	also it can be changed from push to pull by replacing "future" with "delay".. I'll probably make that an option somewhere
19:06	hiredman	stain: have you seen prismatics stuff for this?
19:07	hiredman	https://github.com/Prismatic/plumbing#graph-the-functional-swiss-army-knife
19:08	stain	hiredman: yes, I looked at it earlier
19:09	stain	but I wanted to finish mine first before trying it
19:18	stain	hiredman: what is smooth with the prismatic graph is how it has autowiring of the parameters
19:20	stain	but it seems ironically to not have a good way to do the plumbing independently
19:29	hiredman	stain: I would take plumbing and extend it with component's dependency system then
19:30	hiredman	e.g. avoid the dsl macros and use a sort of environment map of names to functions and a dependency map of functions to arguments
19:44	stain	hiredman: yeah, that sounds like a doable approach as well.. a bit different style, though
21:10	lvh	Is there anything obviously wrong with these compojure routes? I'm getting 404s, which leads me to believe that resources is taking precendence: https://gist.github.com/lvh/af3a2825d7647345437b
21:21	xulfer	Looks okay to me
21:22	justin_smith	lvh: have you tried restarting your server since the definition?
21:23	lvh	justin_smith: ah; good idea :) figwheel has spoiled me!
21:23	justin_smith	if restarting fixes it, try passing #'app to your http server as the handler instead of app
21:25	lvh	justin_smith: yep! thanks :)
21:25	lvh	justin_smith: wait, ring knows how to deref stuff?
21:47	justin_smith	lvh: ##(#'+ 1 1) ; vars deref when invoked
21:47	lazybot	⇒ 2
21:50	justin_smith	lvh: the difference ends up being, of course, if the server is using your var, it will see any new definitions, not so if it is using a function