#clojure – 2015-06-22

2015-06-22

00:24	elvis4526	is it possible to use add-watch with mutliple atoms at the same time ?
00:25	justin_smith	elvis4526: there's no reason you can't use the same watching function for multiple atoms, if that's what you mean
00:25	elvis4526	I'm sorry, I meant like watching atom1 and atom2 and only trigger the callback when both gets changed
00:27	amalloy	elvis4526: atoms aren't coordinated, at all
00:29	justin_smith	elvis4526: there's nothing that acts like that, but you could make something (perhaps using a channel, or an atom or delay), that would wait for both atoms to change before triggering some action
00:30	amalloy	and what happens if a changes twice, then b changes twice? there is a lot of detail to be ironed out in that specification
00:31	justin_smith	definitely
00:31	elvis4526	Yeah okay thanks ! I believe if I would be using Clojure on the JVM I could use agents for that, correct ?
00:32	justin_smith	elvis4526: you could use an agent that holds the set of modified atoms, and then send it a function that updates, and then perhaps executes something if the right things are present in the agent value
00:39	elvis4526	perfect - that's really cool.
02:13	gniquil	hi all, got a quick question about clearing the symbols defined in a namespace... in my tests, sometimes I would define a test say "deftest abc-test", then after some refactoring, i would change the name of this test, as the code has been refactored, however, when I go into the namespace and run (run-tests), although all the new tests would pass, the old test would still be defined and ran. Is there a way to "clean" this up?
02:22	H4ns	gniquil: i use (remove-ns 'the-ns-name) often to clean up such things.
02:24	gniquil	Thanks! that was easy
02:24	H4ns	gniquil: i.e. i use remove-ns and then reload it. this can create issues with dependent namespaces, but for test namespaces, it should normally work fine.
02:24	gniquil	funny you can even do that while in the ns
02:24	gniquil	awesome, again thanks for the help
02:41	musty	:)
02:42	musty	Hello clojure expertz.
02:44	Empperi	can't say hello back since I'm not an expert
02:44	Empperi	I'm a GOD
04:35	kwladyka_	how to recognise reason of exception in Clojure? for example refuse connect to DB, I can get exception message by (.getMessage e), but how can i determinate reason of exception? I want react of this exception in specifics way.
04:37	kwladyka	For example I am getting "Connection to localhost:5432 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections." and how to know is this reason of error and react for that?
04:55	oddcully	kwladyka: i'd not try to do anything smart here. fail and provide the user with the message
04:57	kwladyka	oddcully, but i want just to know how to do that. Or is it just bad idea?
05:01	kwladyka	oddcully, or in another way: I am doing inster! to db and if I get exception about not unique primary_key I don't want just show user big error, because I want call another action then.
05:04	Pupeno	When I run foreman start in my luminus app, I get this error: 10:04:22 web.1 \| Error: Could not find or load main class clojure.main, how can I get more details about the error?
05:10	Pupeno	This is the line being executed java $JVM_OPTS -cp target/foobar.jar clojure.main -m foobar.core. Does it look correct or do I have to change something there?
06:25	kwladyka	i solved my problem
06:27	tim__	lazy-seqs, "In general, you can think of lazy seqs as "recipes" for how to generate each element in the sequence"
06:28	tim__	what if I have a function that returns say 10 results at a time
06:28	tim__	say its an API im calling that returns 10 items per call
06:28	tim__	can I make this into an infinite sequence ?
06:34	mmeix	do you need it infinite?
06:35	Pupeno	mmeix: I think he just wants the lazy-seq to abstract the fact that results comes in batches.
06:37	tim__	@Pupenu yeah, @mmeix, it doen't really need to be inifinite I just thought that would be a way to handle it, I was thinking of an lazy seq combined with take-while ( I don't have in database already )
06:37	mmeix	ok
06:38	Pupeno	tim__: it sounds like it should be possible, but I don't know how, I'm new to this and having that internal mutable state might not be the most straightforward in Clojure.
06:38	schmir	wouldn't (mapcat identity (repeatedly f)) do what you want?
06:38	mmeix	something like iterate my-api-call maybe?
06:39	schmir	f should return a seq of the 10 results...
06:41	tim__	schmir: thanks I'll try that, somone in clojure-beginners suggested lazy-cat as well
06:41	mmeix	(we have a channel #clojure-beginners?)
06:42	oddcully	mmeix: see topic
06:42	tim__	that's what it said when I logged in :)
06:42	mmeix	ah ...
06:44	mmeix	ok, then I can bother them :-)
06:51	Guthur	has anyone tried arcadia-unity with unity 5 on Win64?
06:51	Guthur	I have a REPL but can not seem to get it to load any of my script files
06:51	Guthur	I get: Skipping Assets/Arcadia/Scripts/core/bar.clj, namespace in ns form does not match file name
07:17	kwladyka	https://www.refheap.com/104347 - why clojure.test has (not (= "23505" (.getSQLState e))) instead of value of this while compare???
07:18	kwladyka	so strange
07:20	oddcully	comparing magic number looks scary
07:20	kwladyka	(println (.getSQLState e)) works in register-step-1, it shows the value
07:20	kwladyka	so is it something wrong with clojure.test?
07:44	Pupeno	What's the appropriate approach to set credentials on luminus with postgresql so it works on production on heroku as well as locally?
07:58	kwladyka	Where can i looking help with my problem about clojure.test? I don't repository like that on github
07:58	Jickelsen	I am not an expert but my setup uses environment variables on the heroku side for auth credentials and an open database for dev, or sets the credentials in dev-specific namespaces. But I'd love to hear that this is a terrible idea and that some other way is better. :)
07:59	tdammers_	Jickelsen: it's a fairly decent setup, as long as your dev setup is firewalled off the general internet like crazy
08:01	Jickelsen	I guess it would help too if you had a separate dev database altogether
08:02	kwladyka	mmm i will ask on clojure/clojure
08:06	kwladyka	damn... no idea what to do with that
08:19	noidi	kwladyka, you have quoted the expression, thus preventing the method calls from being evaluated
08:19	noidi	,(quote (.foo bar))
08:19	clojurebot	(.foo bar)
08:19	noidi	,(first (quote (.foo bar)))
08:19	clojurebot	.foo
08:19	noidi	,(type (first (quote (.foo bar))))
08:19	clojurebot	clojure.lang.Symbol
08:19	kwladyka	noidi, thank you!!!!!!
08:20	kwladyka	but... how to code that to use list?
08:20	kwladyka	or maybe just use vector?
08:20	noidi	if you need a sequence of values, it's idiomatic to use a vector literal
08:21	kwladyka	i just need list of errors to show them to user, I am not enough experience to know what will be better
08:21	noidi	try this: {:errors [{:message (.getMessage e) :code (.getSQLState e)}]}
08:22	kwladyka	so vectors will be better?
08:22	noidi	yes
08:22	justin_smith	for literals, vectors are always better
08:22	kwladyka	can you explain why?
08:22	noidi	vectors are evaluated to themselves
08:23	kwladyka	mmm so how to know to which one should i use?
08:24	kwladyka	i thought it is about performance
08:24	noidi	as a rule of thumb, use lists for function calls and vectors for everything else :)
08:24	kwladyka	and as i understand vectors are better with reading by index but list with adding/reading to begin/end
08:24	justin_smith	kwladyka: no, lists are terrible for adding at the end
08:25	noidi	in the rare case you specifically need a list, you can construct it like this: (list 1 2 3)
08:25	noidi	in general you don't need to use quoting except when writing macros
08:25	justin_smith	realistically, (seq [1 2 3]) is just as good
08:25	kwladyka	noidi, mmm i can do like that but is it really like i should do?
08:25	justin_smith	kwladyka: in general you don't need to make lists at all
08:26	kwladyka	it is so confuse :)
08:26	justin_smith	kwladyka: some functions have good reasons to return lazy-seqs
08:26	justin_smith	kwladyka: for literals, use a vector. If you need something to prepend to the front, you can use seq to get a data type that does that.
08:26	justin_smith	otherwise, vectors are better
08:27	kwladyka	hmm so you never use list for data?
08:27	justin_smith	not for literals
08:28	justin_smith	only use a list if you need to remvoe or add items at the front
08:28	kwladyka	justin_smith, ok thank you
08:28	justin_smith	and for that, you can use seq to turn a vector into a list, you never need a list literal except in a macro
08:29	kwladyka	yeah my test working! :)
08:30	kwladyka	and with this it is time to end learning today, I am enough happy with progress today :)
08:45	tcrawley	expez: non-SNAPHSOT releases to clojars are immutable, even if you don't promote them
09:30	expez	tcrawley: it would be nice to be able to correct mistakes :(
09:31	expez	nobody can download a non-promoted non-snapshot release, right?
09:32	tcrawley	no, anybody can download it. you have to add a new repo to download promoted releases, which no one does, because 90% of projects aren't promoted
09:32	tcrawley	the promoted repo isn't really used at all
09:32	expez	I see
09:33	tcrawley	so allowing replacement of releases reopens a can of worms that allows silently changing artifacts that may be in use
09:34	expez	yeah, it makes perfect sense now that I know how it works :p
09:34	tcrawley	good deal
09:41	puredanger	tcrawley: it
09:41	puredanger	tcrawley: it's like you're saying that immutable data is a good thing
09:41	tcrawley	I know, right?
10:45	csd_	Can amnyone provide advice on debugging Cider when symbol lookup fails? I.e. for docs lookup. I'm not getting an error other than symbol not found
11:06	natto	is there an idiomatic way to dedupe function code across several files, if the code is identical, but references a namespace local?
11:06	natto	here's a toy example: http://pastebin.com/J2yFmQCG
11:10	mmeix	by putting it in a utils.clj namespace and referring it?
11:12	natto	mmeix: how do you do it, if the function refers to like an atom defined in the file that refers utils.clj?
11:12	mmeix	ah, sorry
11:15	mmeix	would (defn utils/shorthand-get-id [some-atom] (:id @some-atom)) work?
11:15	mmeix	not sure, if this is the intent though
11:16	natto	mmeix: yes it would, but then it stops being a shorthand
11:16	mmeix	sorry for (defn utils/...
11:16	mmeix	I see
11:22	mmeix	I think, in your example my-atom needs a def
11:22	mmeix	(def my-atom (atom {}))
11:22	natto	you're right
11:23	mmeix	and then you would refer it by name
11:24	natto	oh interesting, resolve the atom name at runtime?
11:24	mr-foobar	I am trying to install lein on a new ubuntu server.
11:24	mr-foobar	wget http://leiningen.s3.amazonaws.com/downloads/leiningen-2.1.2-standalone.jar <-- 403
11:25	irctc	Hello, I am using https://github.com/xsc/pandect, and I am unable to convert a byte array to string. When i do (println (str my-value)), I get somehting sensible like #bin yfCxXLFMydFZ1XC5PRuSXzNe3u6yLY3X1gqM5IjHxSE=. I want it without the #bin = part, is that possible ?
11:25	justin_smith	irctc: String.
11:26	justin_smith	,(.getBytes "hello")
11:26	clojurebot	#object["[B" 0x3a53be08 "[B@3a53be08"]
11:26	justin_smith	,(str (.getBytes "hello"))
11:26	clojurebot	"[B@5030944d"
11:26	irctc	I tried (String. signature)
11:26	justin_smith	,(String. (.getBytes "hello"))
11:26	clojurebot	"hello"
11:26	irctc	but I get something unreadable
11:27	justin_smith	irctc: looking at what you pasted above, that looks like base64?
11:27	irctc	I tried that too, specifically I use sha256-hmac-bytes
11:28	irctc	@justin well I'm not sure. I don't use base64 myself
11:28	irctc	I just use plain text
11:29	irctc	the thing is, sha256-hmac gives me a string, but not the same as in (println (str sha256-hmac-bytes ..))
11:30	irctc	But I can't seem to find how to get only the string (without #bin ) when using sha256-hmac-bytes, which is otherwise the correct string
11:30	justin_smith	irctc: what is the type? if it prints as #bin, that's not a byte-array
11:30	irctc	ooh I thought it was a byte array
11:31	irctc	but yes it's probably not
11:31	irctc	i have an exception on .getBytes
11:31	justin_smith	irctc: well, there is this function "type" which will tell you what the type is, then you can figure out what you can do with that value
11:32	justin_smith	,(type (.getBytes "hello"))
11:32	clojurebot	[B
11:32	irctc	Thanks :)
11:32	irctc	yes the type is [B
11:33	justin_smith	in that case (String. v "encoding") will correctly give you the value as a string, though you may need to find the right value for encoding
11:33	irctc	hmm I tried UTF-8 already
11:33	justin_smith	irctc: https://docs.oracle.com/javase/8/docs/technotes/guides/intl/encoding.doc.html
11:33	irctc	Is it the default in Clojure ?
11:34	justin_smith	,(String. (.getBytes "hi ¬ˆ˚™£") "UTF-8")
11:34	clojurebot	"hi ¬ˆ˚™£"
11:34	justin_smith	,(String. (.getBytes "hi ¬ˆ˚™£") "IBM00858")
11:34	clojurebot	"hi ┬¼╦å╦ÜÔäó┬ú"
11:34	irctc	Ok I'll try some encodings then
11:34	mmeix	natto I think you can do (:id @one/my-atom) in core and don't need a getter function
11:35	mmeix	(justin correct me, if this is nonsense :-)
11:35	irctc	OOh no I forgot : I get No matching field found: getBytes for class [B
11:35	justin_smith	mr-foobar: you should be downloading the lein script, and it will find the standalone
11:35	justin_smith	irctc: it is bytes, why getBytes from it?
11:36	irctc	Hmm right sorry.. :)
11:36	justin_smith	I am just using .getBytes on a string because that is a convenient way to make a byte array with known contents
11:36	irctc	Ok I get that thanks
11:37	mmeix	natto also you could do just (def my-atom (atom {:id 1})) in one.clj
11:37	mr-foobar	justin_smith: the lein script is throwing the error. its a new ubuntu server, so I am running an automated script "wget --no-check-certificate -O https://raw.githubusercontent.com/technomancy/leiningen/stable/bin/lein" followed by `lein new ...` using salt.
11:37	natto	mmeix: right, but the shorthand function is of arbitrary complexity
11:38	justin_smith	mr-foobar: oh, odd, why is it trying to use such an old version?
11:38	natto	i have a workaround, i think it is ugly, but i don't know how else to do it
11:38	TimMc	mr-foobar: Yikes, why --no-check-certificate ?
11:39	mr-foobar	TimMc: lulz .. yeah bad copy-paste.
11:39	mmeix	natto but you can refer to the atom directly by namespace/name and then extract things from it in core as complicated as you want, I think
11:39	justin_smith	mr-foobar: look at the first few lines, it should be trying to get 2.5.1 https://raw.githubusercontent.com/technomancy/leiningen/stable/bin/lein
11:39	natto	in utils.clj, you (declare shadow-my-atom) (defn bind-atom [a] (def shadow-my-atom a)) (defn shorthand-fn [] (... use shadow-my-atom))
11:39	natto	and use that in the other clj
11:40	mmeix	I think this is too complicated
11:41	irctc	Sorry to ask again.. isn't [B a Byte Array ?
11:41	justin_smith	irctc: yes
11:42	natto	mmeix: in a more elaborate example you'd store config (e.g. POST endpoint URL) in an atom
11:42	justin_smith	and to make a string from a Byte Array, you use the String constructor (with optional encoding argument)
11:42	natto	and say you defn a submit-to-server that reads which endpoint based on the config atom
11:42	mmeix	wouldn't your last defn just be (defn main [] (prn (str "one's id " (:id @one/my-atom) ", " "two's id " (:id @two/my-atom)))) ?
11:42	csd_	Is it possible to break up dependencies into two separate vars in project.clj, and then have :dependencies (merge deps_a deps_b), or similar?
11:42	justin_smith	csd_: this is what profiles do
11:43	irctc	ok thanks there is something that I miss obviously.. I'll be back :p Thanks
11:43	justin_smith	csd_: and yes, project.clj can run arbitrary clojure code, though it's often a bad idea
11:43	natto	mmeix: my toy example was too simple, indeed in the toy case it's best to just read the value directly like you wrote
11:43	csd_	justin_smith: i'm working on a project where i need to import deps for the platform which is being imported a jar and id like to distinguish between project and platform deps.
11:44	csd_	profiles dont strike me as the right choice in this case
11:44	justin_smith	csd_: yeah, that sounds like a profile (eg. define one profile per platform and run with said profile merged?)
11:45	csd_	hmm ill take a closer look at how they work
11:45	justin_smith	though if you really need the flexibility you can absolutely use arbitrary clojure code to construct your :dependencies vector
11:45	csd_	its more just a clarity thing than a flexibility thing
11:45	justin_smith	but the default usage of profiles is to merge things, so go with that if you can
11:45	mmeix	natto I'm not sure I understand correctly, but why would you store config data in different atoms in different namespaces? I guess I didn't understand the use case
11:45	csd_	seems cleaner to split it out
11:48	natto	mmeix: better example http://pastebin.com/x5ZQxKra
11:48	natto	i have not actually tries this, it doesn't look right, but it does work in clojurescript
11:49	natto	i.e. re-binding the atom into another namespace and deref-ing it there
11:49	justin_smith	natto: what do you gain by defining an atom in the client ns, rather than simply swapping new values into an atom created in the util lib?
11:49	mmeix	this is what I'm wondering too
11:50	justin_smith	natto: I can tell you what you lose - if other libs also want to use the util lib, the last one to access it in such a way "wins" and destroys all other config
11:50	justin_smith	natto: if the util namespace owned the atom, you could at least have cooperative setting of the config
11:51	natto	justin_smith: points taken. I can forgo the atom usage example
11:51	mr-foobar	justin_smith, TimMc: it works ! the bash script was old.
11:51	justin_smith	also, I can't see anything in the code as it is that meaningfully uses the feature of an atom - it may as well just be a top level map instead
11:51	mmeix	the battle of the confs :-)
11:51	natto	the problem is i'm trying to reuse e.g. the "handshake" code in utils
11:52	natto	or any other function, sans the arguments
11:52	mmeix	this seems to much object thinking, I guess
11:52	mmeix	!to be
11:53	mmeix	*
11:53	natto	sort of
11:53	natto	you can write a util/useful that takes an argument, which you have defined in the referring namespace
11:54	natto	but after enough calls I get lazy and I write an argument-less version called "shorthand"
11:54	justin_smith	natto: with an atom, use swap! to cleanly set keys. defining something from outside the namespace is never a good idea
11:54	natto	... but now I want to use "shorthand" without redefining across files
11:54	mmeix	why do you need "shorthand" in the first place?
11:55	mmeix	if it's just a function to extract a value, you can write it once and use it everywhere
11:55	justin_smith	natto: also, the right way to do OO style config in clojure is stuartsierra/component, not top level atoms
11:55	justin_smith	it also happens to be the right way to do functional style config too
11:56	mmeix	a config is just a map in a defined place, right?
11:56	natto	ah yes. this is really example fail on my part
12:00	mmeix	natto by the way, if you need an "argument-less" version of a function, you can use 'partial' (if that is what you want)
12:00	mmeix	,(doc partial)
12:00	clojurebot	"([f] [f arg1] [f arg1 arg2] [f arg1 arg2 arg3] [f arg1 arg2 arg3 & ...]); Takes a function f and fewer than the normal arguments to f, and returns a fn that takes a variable number of additional args. When called, the returned function calls f with args + additional args."
12:01	mmeix	but I guess, this is not what you meant
12:02	mmeix	mmeix shutting up and returning to newbie status :P
12:02	natto	mmeix: actually, that might be the best route, let me think about it
12:02	natto	but let me give one more try at explaining my use case
12:03	natto	in ns.util you've a (defn bunch-of-stuff [some-value] ... )
12:03	natto	in ns.one you have (def my-ns-global ...) and use a lot of (util/bunch-of-stuff my-ns-global)
12:03	natto	in ns.two you have (def my-ns-global ...) and use a lot of (util/bunch-of-stuff my-ns-global)
12:03	natto	you get lazy, and in ns.one you (defn bunch-of-stuff-using-global [] (util/bunch-of-stuff my-ns-global))
12:03	natto	but can you somehow define bunch-of-stuf-using-global already, and use it in ns.two referring to two/my-ns-global?
12:04	natto	mmeix: doing the partial means defining the partial in util
12:04	natto	then in ns.two, (def bunch-of-stuff-using-global (partialed-bunch-of-stuff my-ns-global))
12:04	natto	and that completes the "shorthand"
12:04	mmeix	uff
12:05	natto	but can we skip that altogether even?
12:05	mmeix	quite long hand ... ;-)
12:06	mmeix	I'm still not understanding, why you would need all those "getter" functions
12:06	natto	they're not getter functions, they have arbitrary complexity
12:06	mmeix	but maybe I'm a bit brain dead after a day full of exams here
12:07	mmeix	(here is Vienna music univ)
12:08	mmeix	natto forget about the partial thing, it was just on a side note
12:10	natto	mmeix: at the moment it seems like partial would save me the most typing actually
12:13	mmeix	but I'm under the impression, that managing global config is more of a structural problem
12:15	mmeix	and several namespaces fighting for dominance over a app state seems confusing, at least
12:15	natto	ok, so I'm designing interactive psychology experiments that have e.g. different appearances
12:15	natto	but lots of the core logic is shared
12:15	mmeix	ok
12:15	natto	I've set up profiles.clj to compile a version based on the CLI switch
12:16	natto	so a different clj file gets included at compile time
12:16	mmeix	ah ...
12:16	natto	then I put the shared code into a different file
12:16	natto	so each variant of the experiment has a global state atom
12:16	natto	and I want to call things like (update-state) instead of (update-state my-state)
12:17	csd_	How can I debug why JARs aren't loading properly into my project? The error message lein gives me is very unhelpful
12:20	mmeix	natto I guess you would have to ask the wise here (maybe with a real example), I'm not that fluent to give a helpful answer in this case (but I tried :)
12:37	natto	mmeix: partial works great, thanks
12:37	mmeix	:-)
12:38	natto	justin_smith thanks for the link
12:38	gfredericks	does anybody know how cider-inspect works?
12:38	gfredericks	I'm using cider 0.9.0 so I assume it's supposed to work
12:40	gfredericks	I run M-x cider-inspect on a symbol and get an error flashed in the minibuffer like: error in process filter: Wrong type argument: char-or-string-p, ("Class" ": " ("value" "java.lang.String" 0) ("newline") "Value: " "\"#object[clojure.test.check.rose_tree.RoseTree 0x54a26423 \\\"clojure.test.check.rose_tree.RoseTree@54a26423\\\"]\"")
12:40	gfredericks	maybe it's those dang deftypes
12:42	gfredericks	yeah now it just hangs because the object is sooper big
12:42	gfredericks	which I thought was one of the use cases for the inspector o_O
12:52	Pupeno	I feel I'm missing something here, but deploying Luminus to Heroku and make it connect to PostgreSQL seems non trivial as Luminus cannot pick up DATABASE_URL. I could write the code to do that, but am I the first one to try this?
14:43	Pupeno	We may be adopting clojure at my company. Any recommendations on a book for the devs that are not familiar with any lisp at all?
14:44	pbx	Pupeno, i've enjoyed the o'reilly book - http://shop.oreilly.com/product/0636920013754.do
14:44	pbx	it makes a lot of references to the popular dynamic languages (python, ruby) which helps many people
14:47	Pupeno	pbx: I think I'm sold, as my team knows python and ruby (one of our working languages) very well.
14:50	Pupeno	Oh, it's from 2012... still ok?
14:50	eriktjacobsen	Pupeno: https://leanpub.com/fp-oo
14:51	pbx	Pupeno, i'm told it is, yes
14:51	Jickelsen	Trying to use aget to access properties in React. Are there any gotchas I might've missed? (aget js/React "addons") returns nil, and I am including react-with-addons.js in the body before my compiled javascript
14:51	eriktjacobsen	it isn’t specific to clojure, but uses clojure as the example language. It is supplementary to learning clojure books, but it is better for the “mindset shift” from non function nonlisp programmers
14:51	dnolen	Pupeno: still OK, Clojure hasn't fundamentally changed significantly in this time.
14:52	dnolen	and honestly likely to be ok for years to come
14:52	dnolen	Jickelsen: there's a #clojurescript channel
14:53	Jickelsen	dnolen: Thanks!
14:54	Pupeno	Oh, this looks interesting: https://pragprog.com/book/cjclojure/mastering-clojure-macros
14:54	hellofunk	Pupeno: Joy of Clojure is also a good book
14:55	Pupeno	hellofunk: that's what I read, I still have the first edition. I felt that some parts of the book were only clear to me because I been toying with Common Lisp and Scheme for years though.
14:55	dnolen	Bronsa: so it appears I can use cljs.tools.reader to read all of core.cljs, the main thing I had to change was that read-keyword just seems wrong on master (for the obvious reason that resolve-ns and ns are not yet a thing in a ClojureScript release.
14:56	dnolen	I fixed this by just copy-pastaing read-keyword from Clojure version into ClojureScript version
14:56	Pupeno	Anybody read Living Clojure? http://shop.oreilly.com/product/0636920034292.do
15:01	mmeix	it's a friendly book for beginners, I find
15:02	Pupeno	It covers ClojureScript, which we do want to use.
15:03	jonathanj	i don't suppose there is a (format) syntax for converting keywords into names?
15:04	mmeix	,(name :foo)
15:04	clojurebot	"foo"
15:04	mmeix	https://clojuredocs.org/clojure.core/name
15:05	jonathanj	so not then
15:07	mmeix	(I misunderstood the question?)
15:09	kwladyka	to learn something more I repair bug in https://github.com/cryogen-project/cryogen but I am not sure how to do that in Clojure, because I want repair this in https://github.com/cryogen-project/cryogen-core which is dependency but I need whole project to test it is working.
15:09	kwladyka	How to tell Clojure to use version from my disk during development?
15:12	mmeix	trying
15:12	mmeix	,(format "Hey, %s" (name :foo))
15:12	clojurebot	"Hey, foo"
15:24	sdegutis	To compare two #inst's do you just use java.util.Date methods?
15:32	sdegutis	Yep. Thanks.
15:36	gfredericks	as long as #inst is a java.util.Date in your system
15:55	jonathanj	should i pass a reader to a function? should that function use (with-open) or should the outer function do that?
15:56	jonathanj	i guess if the outer function does that, then i can avoid closing the reader before the lazy seq is fully consumed
16:09	justin_smith	jonathanj: generally, if you are doing lazy processing of any sort on the input, the innermost stage that knows whether you are done or not should also be in charge of closing the input.
16:09	justin_smith	jonathanj: you also don't have to use with-open, you can explicitly call close, and sometimes that is called for
16:09	kwladyka	how to change in procjt.clj :dependencies [[cryogen-core "0.1.22"]] into version on my harddrive?
16:10	justin_smith	kwladyka: you may want a lein checkout (see "lein checkout dependencies") but it's more reliable to use lein install to update the lib, and then use the locally installed version
16:11	justin_smith	but a checkout might be called for if you are doing extensive work in both the lib and your app together
16:11	kwladyka	my goal is to fix a bug inside cryogen-core
16:11	justin_smith	kwladyka: https://github.com/technomancy/leiningen/blob/master/doc/TUTORIAL.md#checkout-dependencies
16:12	justin_smith	but it might be easier to fix cryogen-core within that project using unit tests
16:12	kwladyka	maybe but only one way to be sure it works is test it in real situation
16:12	justin_smith	kwladyka: either way, if you change the version string in the cryogen-core project.clj then use lein install, you can then use that version in your app locally
16:13	kwladyka	yes, it can be one of option, but it can make some conflicts later
16:14	kwladyka	i guess
16:14	justin_smith	kwladyka: to use it locally, lein install is the easiest option. You can use a checkout, but lein install is the first step of using a checkout, so...
16:15	kwladyka	hmm i am working on windows and i don't have symlinks :P
16:15	justin_smith	oh man, that sucks
16:15	kwladyka	yes i know
16:15	kwladyka	many things on windows sucks... next time i will buy mac
16:16	justin_smith	have you considered using an ubuntu vm to develop in? even on a mac the folks on my team like to use ubuntu under vagrant for some stuff
16:16	kwladyka	in my country macs are more expensive then everywhere.... it is consequence of history and war, they just didn't change it after war
16:17	kwladyka	it is a little complicated
16:17	justin_smith	that sounds very frustrating. Maybe you should save up for a trip to the clojure conj and buy a mac while you are here in the US
16:17	kwladyka	but it was the reason why I didn't buy mac as a protest of this absurd
16:18	justin_smith	yeah, makes sense. I use linux instead, unless I need a mac for work (and work pays for it)
16:18	kwladyka	justin_smith, i were using vagrant a few years ago for a while and instead of coding i was loosing time on manage vagrant and system...
16:19	justin_smith	oh, I never had to spend much time managing it. Probably because I forget how hard linux was at first.
16:19	kwladyka	maybe something changed, but few years ago it has too many complication
16:19	kwladyka	i had many problems with things which weren't work on linux if i used vagrant, on clear linux works
16:19	kwladyka	but it was a few years ago
16:20	kwladyka	and even i don't remember what it was
16:20	kwladyka	ofcourse for everything i could find a solution
16:20	kwladyka	but still i loosing time
16:20	kwladyka	i spent aobut 7 years on linux in the past
16:21	kwladyka	but one day a decided back to windows, because linux always sucks with drivers and conflicts
16:21	kwladyka	for desktop
16:21	kwladyka	but windows is terrible for coding...
16:22	TimMc	I've been on Linux for the past 10 years. For the past 6 I haven't had serious driver issues.
16:23	kwladyka	but for desktop? i don't believe, i guess even now if you buy newest hardware linux wouldn't work with that
16:24	TimMc	Laptop.
16:24	justin_smith	kwladyka: I have had very few conflict or driver issues with linux - the exceptions being new hardware and unstable software
16:24	kwladyka	for my experience linux never works with new hardware
16:24	justin_smith	my solution was to buy a laptop with linux pre-installed, set up explicitly to run linux
16:24	TimMc	Thinkpads tend to work very well with Linux.
16:25	kwladyka	i have my own PC, i made it myself with hardware which i choose
16:25	TMA	kwladyka: the steps for flawless experience are: be friends with Linux kernel developers. ask them what laptop they have. buy the exact same one
16:25	kwladyka	and linux totally didn't have drivers for that hardware
16:26	TimMc	Or dual-boot. :-P
16:26	kwladyka	heh, i will just buy a mac next time :)
16:26	justin_smith	kwladyka: I think it's a little rough to blame linux for not supporting random hardware. I mean, it's not like the hardware vendors put any effort into making their shit work with linux.
16:26	kwladyka	i am a little sceptic about changes in linux
16:26	TimMc	TMA: Alternative plan: Give your favorite Linux kernel developer a "gift" of some hardware. ;-)
16:26	justin_smith	(inc TimMc)
16:27	kwladyka	justin_smith, of course but windows have drivers
16:27	TMA	TimMc: that's twice as expensive and not at all guaranteed to work
16:27	justin_smith	kwladyka: because the hardware vendor wrote those drivers
16:27	kwladyka	justin_smith, yes - that is the point
16:27	kwladyka	justin_smith, everything support windows, not linux
16:29	kwladyka	but last time when i used linux was... mmmm... 5-7 years ago
16:29	justin_smith	kwladyka: I have a laptop at home that has 32 gigs of ram, supports 5 external monitors, up to 4k resolution, has high quality built in audio, wifi, bluetooth, etc. etc. and it all worked with linux with 0 setup on my part, because I bought from a company that specilizes in making machines to run linux on. It's a couple years old now and the specs are still good.
16:30	justin_smith	kwladyka: still cheaper than a mac with worse specs
16:30	kwladyka	maybe things changed, when i was using linux in my country it was almost impossible to buy good laptop with linux.
16:30	katratxo	justin_smith: which company is that?
16:31	kwladyka	justin_smith, so don't you have MAC?
16:31	csd_	Is there a function that will return the methods of an instantiated java object in clojure?
16:31	kwladyka	in USA you have always things faster, because you produce most of them :P
16:32	TimMc	kwladyka: Which is funny, because they're not even made here.
16:32	justin_smith	kwladyka: I use a mac at work, because they expect me to use one (and gave me one to use), I just leave it on the desk in my office
16:32	kwladyka	TimMc, yes, exactly
16:33	justin_smith	csd_: bean works for some stuff, otherwise there is clojure.reflect
16:33	justin_smith	,(bean (java.util.Date.))
16:33	kwladyka	justin_smith, why? i don't have too much experience with mac. Only basic.
16:33	clojurebot	#error {\n :cause "denied"\n :via\n [{:type java.lang.ExceptionInInitializerError\n :message nil\n :at [java.lang.reflect.Proxy$ProxyClassFactory apply "Proxy.java" 672]}\n {:type java.lang.SecurityException\n :message "denied"\n :at [clojurebot.sandbox$enable_security_manager$fn__835 invoke "sandbox.clj" 69]}]\n :trace\n [[clojurebot.sandbox$enable_security_manager$fn__835 invoke "sandbo...
16:33	justin_smith	it won't let me make a bean :(
16:34	blkcat	macs are pretty great when you're not the one paying for it ;p
16:34	TimMc	justin_smith: Error: Dates are not a type of bean, they're an entirely different family.
16:34	justin_smith	TimMc: it works locally, it's a clojurebot thing
16:34	csd_	justin_smith: for the class i used it on. it just returns {:class <classname>}
16:34	justin_smith	oh, sorry, vegetable joke, of course
16:34	justin_smith	csd_: yeah, there is clojure.reflect for the rest
16:35	TimMc	csd_: org.timmc/handy has some reflection stuff
16:35	csd_	ok-- id been looking at the java reflection libs and doesnt seem like it has anything
16:35	justin_smith	csd_: but java.util.Date is a good demo of what bean can do in the best case
16:35	TimMc	Do you just want it for development/debugging?
16:35	csd_	debugging
16:35	csd_	having trouble instantiating something
16:35	justin_smith	csd_: oh, it has EVERYTHING, and none of it is easy to use (but the TimMc stuff helps)
16:35	TimMc	org.timmc.handy.repl/show
16:35	kwladyka	do you thing lein checkout can work with direcotry with project instead of symlink ? ;)
16:35	kwladyka	*think
16:36	justin_smith	kwladyka: couldn't hurt to try
16:36	kwladyka	justin_smith, yes, i am trying to do that :)
16:36	TimMc	https://gist.github.com/timmc/1cd194b6ac5980a8c548
16:36	justin_smith	kwladyka: but as I said, lein install works too (as does loading the edited source code in your repl, even from inside a different project)
16:36	csd_	TimMc: sounds like what i need
16:36	csd_	thanks
16:36	justin_smith	kwladyka: you don't need symlinks or subdirs for lein install to work
16:37	kwladyka	justin_smith, i will try this if checkout fails
16:37	TimMc	I use this thing constantly. One of tehbetter things I've hacked together. :-P
16:37	justin_smith	kwladyka: remember checkout won't work unless you run lein install with your modified project.clj version string
16:38	csd_	TimMc: Can I just make it a dep in my profile?
16:38	TimMc	csd_: Yeah, in profiles.clj :user :dependencies I have [org.timmc/handy "1.7.0"]
16:39	csd_	cool
16:39	TimMc	so it's available in all my REPLs
16:39	TimMc	that and criterium and tools.trace :-P
16:41	kwladyka	justin_smith, i am not sure how is it working or it doesn't work without symlink...
16:41	kwladyka	i created checkouts, put there crygoen-core
16:42	kwladyka	changed there version number and changed in :dependencies in main project.clj
16:42	justin_smith	kwladyka: first step is to modify the version string. Next, run lein install so that version is available in the local repo. Then put the symlink (or repo?) into your checkouts subdir
16:42	kwladyka	lein install from subproject or project?
16:42	justin_smith	subproject
16:42	kwladyka	so what checkouts gives?
16:43	kwladyka	it is the same like run that separate?
16:43	justin_smith	kwladyka: when you edit the code, the edited code is visible to your repl for reload
16:43	justin_smith	without having to restart the repl, or manually load the code
16:43	kwladyka	but after each change i have to do lein install?
16:43	kwladyka	is it work with lein ring server?
16:43	justin_smith	no, the point of checkouts is that you don't have to install
16:44	kwladyka	so why do i need this first time? how is it working?
16:44	justin_smith	it can't fulfill the checkout dep unless you run lein install so that it can find the pom
16:44	justin_smith	that's because checkouts are fundamentally a hack
16:45	justin_smith	but after that it should just work (until you change the version)
16:45	kwladyka	justin_smith, oh, now i think i understand
16:45	kwladyka	justin_smith, if it is a hack
16:51	csd_	TimMc: why do you think i might be getting told no method found for <x> when i've confirmed that the method i'm trying to use does exist, is public, and that i'm using the correct function signature
16:51	csd_	i don
16:51	csd_	err
16:51	kwladyka	mmm how can i debug project with lein ring server. I want just see what is under variables, unfortunetly (ptrinln foo) doesn't show anything in console, i am not sure why
16:52	TimMc	csd_: Any primitives involved? Varargs? static/instance?
16:52	TimMc	Maybe post the method signature and the call you're trying to make.
16:53	csd_	public CompiledScript compile(String js, boolean debug) throws InvalidJsException
16:53	csd_	just trying to call (.compile obj "foo" true) , basically
16:56	TimMc	Looks fine, yeah.
16:57	csd_	meanwhile I'm told IllegalArgumentException No matching method found for class, and yet i can look it up just fine with your code and see that that method does in fact exist
16:57	justin_smith	csd_: is it varargs?
16:58	csd_	no
16:58	justin_smith	does it take an int?
16:58	csd_	a string and a bool
16:58	justin_smith	what's the class?
16:58	csd_	its just a business object
17:00	csd_	there's this guice code scattered through the codebase, making it difficult to know what's going on, but i don't think it's affecting this particular code
17:00	TimMc	csd_: Freaky. Does the exception tell you what types it thought you were trying to use in the call?
17:01	justin_smith	TimMc: matching method not found never does that
17:01	justin_smith	because methods are dispatched by arg types
17:01	TimMc	aw
17:01	csd_	http://pastebin.com/aaVxCVR6
17:01	TimMc	,(.flurb "" 5)
17:01	clojurebot	#error {\n :cause "No matching method found: flurb for class java.lang.String"\n :via\n [{:type java.lang.IllegalArgumentException\n :message "No matching method found: flurb for class java.lang.String"\n :at [clojure.lang.Reflector invokeMatchingMethod "Reflector.java" 53]}]\n :trace\n [[clojure.lang.Reflector invokeMatchingMethod "Reflector.java" 53]\n [clojure.lang.Reflector invokeInstance...
17:01	csd_	that's the error
17:02	TimMc	Ghosts.
17:02	justin_smith	same error with real method but wrong types
17:02	justin_smith	,(.getTime (java.util.Date.) "foo")
17:02	clojurebot	#error {\n :cause "No matching method found: getTime for class java.util.Date"\n :via\n [{:type java.lang.IllegalArgumentException\n :message "No matching method found: getTime for class java.util.Date"\n :at [clojure.lang.Reflector invokeMatchingMethod "Reflector.java" 53]}]\n :trace\n [[clojure.lang.Reflector invokeMatchingMethod "Reflector.java" 53]\n [clojure.lang.Reflector invokeInstance...
17:03	TimMc	justin_smith: Right, I guess it can't decide what the relevant ancestor of each argument's class is.
17:03	TimMc	(Is 5 an int, an Integer, or an Object?)
17:05	csd_	yes
17:07	TimMc	csd_: Can you try invoking the method via reflection? Here's an example with String.indexOf: (.invoke (.getMethod String "indexOf" (into-array Class [String])) "foo" (into-array Object ["o"]))
17:08	TimMc	Use Boolean/TYPE for the boolean class.
17:08	csd_	ok one sec
17:09	TimMc	csd_: (.invoke (.getMethod YourClass "compile" (into-array Class [String Boolean/TYPE])) obj (into-array Object ["foo" true]))
17:09	TimMc	sub in YourClass and obj
17:10	csd_	(.invoke (.getMethod ApiJsCompiler "compile" (into-array Class [String Boolean/TYPE]) c (into-array Object ["foo" true]))) ?
17:11	TimMc	yeah
17:11	TimMc	You might try the getMethod separately at first, of course.
17:12	csd_	says no such method
17:12	TimMc	And alternatively try replacing ApiJsCompiler with (class c)
17:12	TimMc	(just in case there are two versions of the class in play)
17:13	csd_	same error
17:13	TimMc	Fascinating.
17:13	csd_	words you dont want to hear :-P
17:14	TimMc	This is using almost the same code as produced that printout for you from handy/show.
17:15	justin_smith	csd_: do you find anything at all similar if you just use reflection to look at all the methods of the object?
17:16	csd_	I think I just figured it out
17:16	csd_	(show ApiJsCompiler) says for this method pub compile : String -> CompiledScript
17:17	justin_smith	no boolean arg?
17:17	csd_	so then i tried not including the boolean and it its still throwing an exception but it's an exception thrown by the function
17:17	csd_	so its ignoring the boolean arg i guess
17:17	TimMc	Where did the boolean come from?
17:17	justin_smith	sounds like there is no public method that takes the boolean
17:18	csd_	TimMc: it's called 'debug' and this is legacy code i just started working on
17:18	TimMc	csd_: Oh... I thought the method signature you gave previously was the output of show.
17:18	csd_	no that was copied from the java code
17:18	TimMc	Ah.
17:18	TimMc	So you're probably not working with the same version of the codebase or something like that.
17:19	csd_	that could be potentially
17:19	csd_	i'm working off jars that someone else put together
17:20	csd_	thank you TimMc, justin_smith. good lessons for the future
17:20	TimMc	Such as not trusting the source? :-P
17:20	csd_	trust nothing
17:20	TimMc	(Don't trust the REPL either. Don't trust anything.)
17:20	TimMc	(inc csd_)
17:20	justin_smith	(dec lazybot)
17:21	TimMc	(dec lazybot) ;; amalloy_ it done broke
17:21	TimMc	Especially don't trust bots.
17:25	lodin_	Some years ago multimethods were (claimed) to be slow. Is that still true, if it ever was? My Java benchmarking skills are rather poor, so I don't trust my own observations, but it doesn't seem like the performance is that bad.
17:27	justin_smith	lodin_: bad is always relative to some need, go ahead and use multimethods, and if you have a performance problem just remember they are one thing you could look out for. They are slower than a regular function call (slightly), or a protocol invocation (by a bit more), but they are likely just fine for a typical use case
17:32	lodin_	justin_smith: I know this question is flawed, but would you dare to guestimate in what range the increase in execution time would lie if all functions were turned into multimethods with only one implementation (:default), in a (pure) non-trivial data transformation application?
17:33	lodin_	justin_smith: 1%? 10%? 100%?
17:33	TimMc	lodin_: I think that would be a fun exercise with a shell script.
17:34	TimMc	You could take an existing codebase and transform it to that.
17:34	justin_smith	lodin_: the flaw is that it's a change in the time it takes the thing to dispatch - normally that is only a small percentage of your execution time, but that totally depends on your method and what all it is trying to do
17:35	justin_smith	so the bigger your methods are / the more intense the calculations they must do, the less expensive (relatively) the dispatch is as a percentage of your runtime
17:35	lodin_	TimMc: Maybe even just refer my own defn after the ns form.
17:35	justin_smith	lodin_: check out criterium, it really helps for this kind of micro-benchmarking stuff
17:36	justin_smith	eg. compare calling a function vs. using a multimethod, where both have the same body and do some configurable amount of work
17:38	lodin_	justin_smith: OK, thanks. I'll check it out.
18:13	cfleming	Can anyone recommend a good IRC channel for diagnosing Java certificate issues? I have a new cert which the JVM isn't trusting, and it's not apparent why.
18:14	justin_smith	cfleming: sounds like something someone on ##java would know the answer to
18:14	cfleming	justin_smith: Thanks, I'll try that
18:14	xemdetia	cfleming, did you put all the roots and intermediates?
18:15	xemdetia	is it signed by Verisign group ca 2 and did you not get rid of the md2 duplicate
18:15	cfleming	xemdetia: Yeah - I'm on a chat with Digicert, we can't work out why it's failing. SSLLabs says everything is hunky dory, and Firefox likes it too.
18:16	cfleming	But JDK 1.6 on OSX doesn't for some reason, even though the CA root cert is in cacerts
18:16	xemdetia	what is the CA
18:16	cfleming	DigiCert
18:16	xemdetia	yeah welcome to the md2 problem
18:16	cfleming	What's the md2 problem?
18:16	xemdetia	what is the full CN of the root you had it signed by
18:16	xemdetia	verisign had an old certificate that they had to reissue because it was signed by md12
18:17	xemdetia	but some javas have it lying around in a keystore
18:17	xemdetia	or worse have both entries
18:17	TimMc	##java? Good luck; don't die.
18:17	xemdetia	but give me the full CN and I can tell if it is the same one
18:17	xemdetia	or dpaste a full cert verify
18:17	cfleming	How do I get a cert verify?
18:18	xemdetia	is it publically accessible?
18:18	cfleming	Yeah, it's on https://cursiveclojure.com
18:19	cfleming	It's an EV cert, according to DigiCert it seems to be set up correctly.
18:19	xemdetia	okay so it is not the md2
18:19	xemdetia	there is another digicert that goes through verisign for some reason
18:20	xemdetia	did you store the leaf, intermediate and root to be served by your https server in the keystore
18:21	cfleming	In which keystore? This should be trusted by the JDK
18:21	xemdetia	Both the root and the intermediate are really new, it's possible jdk 1.6 on osx just doesn't know it exists
18:22	cfleming	It does have the DigiCert High Assurance EV Root CA
18:22	xemdetia	but does it have the intermediate
18:23	cfleming	That's a good question
18:23	cfleming	Does it need it? Surely it only needs to know the root and then it can follow the chain?
18:24	xemdetia	cfleming, validation of certificates is a client side act
18:24	xemdetia	if it doesn't have the intermediate, or the server does not send it
18:24	xemdetia	it can't complete the chain of trust/integrity
18:24	cfleming	The server should be sending it
18:24	TimMc	cfleming: It needs everything but the root. (And the root needs to already be in your truststore.)
18:25	cfleming	I'm pretty sure the server is sending the intermediate, how can I check that?
18:25	xemdetia	it's often easier on the server side to just make your own keystore that is only the certificates that actually matter
18:25	xemdetia	and just tell java to use that
18:26	cfleming	Unfortunately I'm not using Java on the server, it's nginx
18:27	xemdetia	same difference
18:27	xemdetia	cat a bunch of pem's together
18:27	xemdetia	same as a keystore
18:27	cfleming	I've done that.
18:27	xemdetia	does java osx know how to do sha256
18:28	xemdetia	during verify for that version
18:28	xemdetia	I don't know how old is old
18:29	xemdetia	yeah it is not sending the intermediate
18:30	cfleming	How can I see that?
18:30	xemdetia	openssl s_client -connect www.cursiveclojure.com:443 -showcerts
18:31	xemdetia	It's only sending me the first certificate- compare that output to just good ol' openssl s_client -connect www.google.com:443 -showcerts
18:31	TimMc	I'm a little alarmed that Digicert's support didn't point this out.
18:32	xemdetia	be warned s_client will return bad verifications in nearly every setup even if it is working
18:32	cfleming	TimMc: When I started chatting to them an hour ago, he said the intermediate was being sent
18:35	xemdetia	cfleming, it's entirely possible something got touched but I certainly am not seeing it
18:35	xemdetia	openssl s_client -connect -showcerts is the command of the hour
18:36	cfleming	DigiCert have an SSL checker which claims it's being sent: https://www.digicert.com/help/index.htm?host=cursiveclojure.com
18:36	cfleming	Although I tend to believe openssl
18:37	xemdetia	I'm confused, there's nothing on that page that indicates to me that it is being sent
18:37	xemdetia	I think this is one of those cases where the DigiCert SHA2 Extended Validation Server CA is now commonly accepted to be in trusted keystores and just isn't for OS X java 7
18:38	xemdetia	java 6*
18:38	xemdetia	I mean it is in my firefox ETS
18:38	xemdetia	*ESR
18:40	cfleming	That sounds like the problem. So instead of sending my public crt, I should be sending a PEM consisting of that and the intermediate?
18:40	xemdetia	cfleming, yes- http://nginx.org/en/docs/http/configuring_https_servers.html it looks like there is a part just for you under the heading SSL certificate chains
18:41	xemdetia	I apologize for getting my ##openssl in your #clojure :)
18:42	cfleming	I should be apologising, it's all my fault :-)
18:42	cfleming	Thanks xemdetia, that was amazingly helpful.
18:42	xemdetia	for further certificate issues ##openssl isn't a bad place for me to accidentally help
18:43	xemdetia	:)
18:44	cfleming	I'll be sure to ask there next time :-)
18:58	cfleming	xemdetia: That's fixed the problem - thanks! It's much appreciated.
18:58	xemdetia	anytime
20:24	thearthur	is there a type specific java array producing convenience for strings ala int-array or byte-array?
21:26	cryptack	hey, I tried this question in the past, but was unable to get much help…I have an odd issue on my Mac where tab completion isn’t working in the repl (using Leiningen 2.5.1 on Java 1.8)…anyone else experience this issue?
21:29	andyf_	thearthur: make-array can create an array of any desired Java object type
22:24	tmtwd	in clojure, how would we call the function artist.draw();?
22:24	tmtwd	(draw artist) would be the equivalent of draw(artist);
22:36	gfredericks	tmtwd: that's a lot of the difference between OOP and FP; you write a function instead of a method on a class
22:36	tmtwd	i see
22:37	tmtwd	but what if you are interoperating with javacode?
22:37	gfredericks	oh well then
22:37	gfredericks	(.draw artist)
22:37	gfredericks	:)
22:37	gfredericks	"java interop" is special in a few different ways in clojure
23:04	mindbender1	I'm having difficulty importing goog.History. How can I achieve this. (ns foo.baz (:import [goog History])) does not achieve this.
23:31	justin_smith	mindbender1: in cljs you can actually require js libs
23:33	mindbender1	justin_smith: I want to be able to use it like (History.) but I was not able to achieve this.
23:34	mindbender1	I had to do (:import goog.History) before it could even pull it from the jar.
23:35	justin_smith	if (:import goog.History) worked, I am surprised that (:import [goog History]) did not
23:35	mindbender1	I'm even more so.
23:36	mindbender1	Unless it's working right now at your end?
23:36	justin_smith	I have a project where I use the (:import goog.History) version, I am going to try it with the other right now
23:37	mindbender1	Cool. I'll be pleased to here your situation.
23:37	mindbender1	*hear
23:37	justin_smith	does it fail on cljsbuild, or on page load?
23:38	justin_smith	because cljsbuild is not showing me any error
23:39	justin_smith	ugh, this project won't start up normal because I can't access the db, maybe I'll get back to you about it tomorrow
23:39	justin_smith	sorry
23:40	justin_smith	don't feel like setting up a tunnel through work atm
23:46	mindbender1	justin_smith: okay. No p. I also just observed from the cljs-http project that doing just (:import goog.Uri) is enough to use like (Uri.) right from inside the file but not from the repl.
23:47	justin_smith	mindbender1: well, it would only work if your repl was in the importing namespace
23:47	justin_smith	import is specific to a namespace (maybe you realize this already)
23:48	justin_smith	mindbender1: also the (:import whatever.what) form only works inside an ns form
23:48	mindbender1	justin_smith: it doesn't work for me when my repl is in the importing ns.
23:48	justin_smith	it silently does nothing outside the ns form
23:48	justin_smith	,(:import 'this-doesnt.exist)
23:48	clojurebot	nil
23:49	justin_smith	,(import 'this-doesnt.exist)
23:49	clojurebot	#error {\n :cause "this-doesnt.exist"\n :via\n [{:type java.lang.ClassNotFoundException\n :message "this-doesnt.exist"\n :at [java.net.URLClassLoader$1 run "URLClassLoader.java" 366]}]\n :trace\n [[java.net.URLClassLoader$1 run "URLClassLoader.java" 366]\n [java.net.URLClassLoader$1 run "URLClassLoader.java" 355]\n [java.security.AccessController doPrivileged "AccessController.java" -2]\n [...
23:50	mindbender1	I have been trying it out now for several minutes now I guess I'll just use the FQN version.
23:50	justin_smith	,(import '(java.util Date))
23:50	clojurebot	java.util.Date
23:50	justin_smith	that's the repl version
23:52	mindbender1	justin_smith: I suspect it's because the location of that file does not match the segments in the provide symbol.
23:52	justin_smith	interesting...
23:52	mindbender1	whereas a symbol like goog.net.XhrIo does