#clojure – 2014-12-23

2014-12-23

05:12	sm0ke	need some help with jline2, any repl people here?
06:08	PigDude	I get a strange error when excluding `cons' from clojure.core and defining this in a protocol and a record: https://gist.github.com/anonymous/4d8be8bb37b1f2347351
06:08	PigDude	I read that this is a Java 8-specific error
06:09	PigDude	Defining other excluded core functions on protocols and extending those protocols works in other cases, just not with `cons' ...
06:09	Bronsa	PigDude: no, you can't implement inline a method named cons in a defrecord
06:09	PigDude	Bronsa: why is that?
06:09	Bronsa	PigDude: defrecords implement IPersistentCollection which already has a method named cons
06:10	Bronsa	PigDude: either use a deftype instead or extend Cat to ConsAir using extend/extend-type/extend-protocol rather than implementing the protocol inline
06:11	PigDude	Bronsa: why is it important if it is defined inline or not?
06:11	Bronsa	PigDude: if you define it inline, the record will use the interface underlying the protocol and compile your protocol function in a method of the records' class
06:15	PigDude	thanks Bronsa !!
06:21	expez	Bronsa: https://gist.github.com/47527b6ae643928f1863 I run this on all nodes in the AST, trying to find the names of all classes that are used in the file. Does it look reasonable? It looks a bit convoluted to me.
06:22	expez	basically the result of trial and error rather any actual understanding ><
06:24	Bronsa	expez: depends, do you want to catch X in (deftype X [] ) and Y in (Y/foo ..) too?
06:25	expez	yes, all nodes giving me a name I shouldn't remove from the :import clause in the current namespace because the name is in use
06:25	Bronsa	ok so no deftype then, that's imported automatically
06:27	Bronsa	expez: http://sprunge.us/QDNT?clj this should handle all your cases
06:29	Bronsa	expez: btw refer to https://clojure.github.io/tools.analyzer.jvm/spec/quickref.html when you're lost
06:30	expez	Bronsa: tests are green! Thanks! :)
07:32	lxsameer	hey guys, is there any video series to learn clojure around ?
07:41	luxbock	lxsameer: there's https://tbaldridge.pivotshare.com/
07:42	luxbock	lots of videos on core.async, transducers and core.logic
07:43	lxsameer	luxbock: thanks but I want to learn clojure first , I think these videos is for my next step
07:44	luxbock	lxsameer: maybe these https://www.youtube.com/user/Misophistful/videos
07:45	lxsameer	luxbock: thanks my friend
07:45	luxbock	no problem
08:03	luxbock	I have a custom type that implements IPersistentMap and ISeq, and I'm trying to define a print-method for it, but I run into "Multiple methods in multimethod 'simple-dispatch' match dispatch value:" exception
08:04	luxbock	I tried using (prefer-method print-method MyType IPersistentMap/ISeq) but that doesn't work because those two are already preferred
08:04	luxbock	is there a way around this somehow?
08:17	jonathanj	the readme for clj-aws-s3 mention that there are plenty of s3 clojure clients but doesn't mention them and they're not listed on clojure toolbox
08:17	jonathanj	would anyone be so kind as to point me to a few?
08:25	katratxo	jonathanj: clj-aws-s3 is a s3 client, right?
08:36	_kardan	Anyone got an elegant solution to using Joplin for sql db migrations when using env vars for the connection? Right now I use environ in the app code but additional (System/getenv in the project.clj
08:37	katratxo	jonathanj: https://clojars.org/search?q=s3
08:39	jonathanj	_kardan: i'd love to know the answer to that too
08:39	jonathanj	katratxo: thank you
08:39	jonathanj	katratxo: do you have any experience with any of these?
08:49	borkdude	are there any ring/compojure/liberator etc code/project organization guidelines I may borrow inspiration from?
08:49	katratxo	jonathanj: i'm using clj-aws-s3 check the code https://github.com/akvo/akvo-flow-services/blob/develop/src/akvo/flow_services/uploader.clj#L95-L101
08:55	clrnd	hi guys
08:57	nickenchuggets	clrnd: hi
08:57	clrnd	I was looking for info on Clojure's web server's architecture
08:58	nickenchuggets	heh, sorry, I'm new to the language.
08:58	jonathanj	katratxo: what's the normal way of handling asynchronous uploads?
08:58	nickenchuggets	like, 100% new.
08:58	clrnd	me too, congrats :)
08:58	jonathanj	katratxo: i guess future (?) uses a threadpool, so just create a future for each one?
08:59	borkdude	clrnd there is no "Clojure web server", but there are ring adapters for jetty, etc.
08:59	clrnd	oh so ring is just an adapter for jetty
08:59	clrnd	and jetty is java
08:59	borkdude	clrnd and there is also http-kit
08:59	clrnd	nice
08:59	clrnd	what is http-kit?
08:59	borkdude	clrnd there is also more, but jetty and http-kit are widely used. There's also Immutant, which is a web server on top of jboss
09:00	nickenchuggets	I had some questions though, so I guess LISP has its origins in artificial intelligence if I recall correctly...
09:00	clrnd	borkdude, this is the info I wanted thank you very much :D
09:00	borkdude	clrnd here is a more complete list (with benchmarks) https://github.com/ptaoussanis/clojure-web-server-benchmarks
09:01	clrnd	thanks again
09:01	nickenchuggets	although googling around tells me that lisp sort of lost popularity in AI around the 80s.
09:02	tcrayford____	jonathanj: yeah, that is pretty normal. Depends on the volume you're doing etc
09:03	clrnd	nickenchuggets, lisp lost popularity everywhere I think
09:14	nickenchuggets	probably way off topic, but, I'm trying to find someone who is familiar with the area of artificial intelligence and ask them questions.
09:23	luxbock	nickenchuggets: AI is a pretty large field, is there something you are interested in particular?
09:28	luxbock	,(filter (comp (partial = "1.7") :added meta) (vals (ns-publics 'clojure.core)))
09:28	clojurebot	(#'clojure.core/eduction #'clojure.core/dedupe #'clojure.core/vswap! #'clojure.core/vreset! #'clojure.core/cat ...)
09:36	nickenchuggets	luxbock: hahaha, well, I've been reading about "futurology", and I've heard some pretty... wild things.
09:36	nickenchuggets	luxbock: that is, "the singularity"
09:37	luxbock	nickenchuggets: so you are interested in general or strong AI as opposed to weak AI
09:38	nickenchuggets	I'm wondering what someone who actually works in AI thinks about all of this "singularity" stuff
09:38	luxbock	strong, general, impossible(?) vs. weak, practical, applied AI :)
09:40	luxbock	nickenchuggets: I have only worked with weak AI stuff, so I don't have much to say, but you might try asking this question over at #lesswrong
09:40	luxbock	I think it's the type of thing they like to talk about
09:41	nickenchuggets	sweet, thanks
09:42	luxbock	the only general AI related project in Clojure that I know of is http://inbits.com/category/clortex-htm-in-clojure/
09:52	spuz	nickenchuggets: I haven't worked in AI but as a programmer I think the 'singularity' is nonsense
09:54	clrnd	nickenchuggets, the singularity is just a pop term for when the understanding of the process of counsciousness let's us reproduce it
09:54	spuz	if you take the current trends in both AI and computing power you have to go way outside of the realm of feasibility to get to an AI that is more intelligent than a human
09:54	clrnd	nickenchuggets, I think it will happen, in this century probably, but it will not be a breaktrough of any kind, the process will be gradual just like now everyone has a smartphone
09:55	clrnd	I think it's more of a neuroscience problem than a CS one, at list for now
09:56	spuz	if you look at where the developments in AI and computing are coming from today, it doesn't follow that they will ever reach the scale and speeds necessary
09:58	spuz	I think further development will happen in modelling neural networks but it would have to use new technology in order to get the efficiency needed
10:00	clrnd	it will be new technogoly but based on the understading of the human brain, I don't think we don't have the materials, just we lack direction
10:02	bacon198`	spuz: I think you're forgetting how far we've come in the past 20 years
10:03	bacon198`	computers are now impressively powerful compared to back then
10:03	bacon198`	and using the same exact silicon manufacturing techniques
10:03	Morgawr	and yet we still use c++
10:04	Glenjamin	zing!
10:04	bacon198`	Morgawr: we still use COBOL
10:04	mgaare	if there is strong AI, it won't run on intel chips. The branch predictor would get jealous and stop it
10:04	bacon198`	c++ is the least of our problems
10:05	bacon198`	i've been writing classic vb6
10:05	bacon198`	c++ would be a godsend
10:08	Glenjamin	classic vb6 can't buffer overflow
10:08	Glenjamin	can it?
10:08	Glenjamin	i hope it cant
10:08	clrnd	the brain is like ultra-mega-parallel, we will need the cloud or smthg
10:08	bacon198`	I don't know, it doesn't seem to mind profanity
10:09	bacon198`	pretty sure there have already been new computing architectures to resemble the brain
10:09	bacon198`	it's one thing to 'simulate' a brain, rather than just simply build it
10:10	bacon198`	sortof like how emulating an snes on an x86 computer takes more computing power than the hardware
10:33	SagiCZ1	isnt the whole theory of artificial neural netowrk about simulating brain?
10:34	p_l	SagiCZ1: not exactly, but biological structures were the inspiration
10:34	SagiCZ1	it's just about applying local rules and getting some complex macro behavior.. which is probably what the real brain does
10:34	SagiCZ1	or a flock of birds for that matter
11:28	mi6x3m	hey clojure, how would you position the newline when calling a function with named arguments. (foo\n:bla val\nbla val) or (foo :bla val\n:bla val) ?
11:28	mi6x3m	i.e. first pair on the same line
11:29	chouser	Those both look fine to me.
11:30	mi6x3m	personally i use the second variant
11:31	tcrayford____	mi6x3m: I really really prefer taking a map over named arguments these days, but maybe that's just me
11:31	mi6x3m	tcrayford____: it's technically a map :)
11:32	chouser	tcrayford____: I think that's sane.
11:33	tcrayford____	mi6x3m: the named-args style can lead to perf problems in some cases (e.g. if the map is static for your users, they can allocate it once rather than on each call)
11:33	tcrayford____	mi6x3m: it also leads to much easier of passing options through wrappers
11:33	tcrayford____	if I wanna wrap a function that takes named args and do something with the arg, we're each worrying about creating the map. With just taking a map, you can just assoc onto it or whatever in your wrapper
11:33	mi6x3m	tcrayford____: I'm a conformist :>
11:34	hellofunk	mi6x3m: for larger nested forms, the first variant since it causes subsequent lines to indent further to the left so minimize line wrapping in my large-resolution editor
11:34	tcrayford____	mi6x3m: quite a buncha folk do the map over named arg thing these days, think it's getting pretty common
11:35	hellofunk	mi6x3m: indeed Om is based all around that idea
11:35	mi6x3m	interesting
11:36	chouser	map over named args?
11:36	chouser	oh, "prefer [hash]map over named args"
11:36	tcrayford____	(foo {:a 1 :b 2}) instead of (foo :a 1 :b 2)
11:36	tcrayford____	yeah haha
11:37	chouser	Sorry, for a moment I was trying to think (map ??? (apply hash-map args))
11:37	tcrayford____	yeah :D
11:38	hellofunk	chouser don't feel too bad, i was quite perplexed at first when reading about adding a newline character to a function call
11:38	chouser	:-)
11:39	mi6x3m	i like to break right after the name
11:39	hellofunk	i thought you guys were talkinga bout some weird DSL that mixed string formatting with clojure inline
11:39	mi6x3m	but for named args i usually wait till after the first pair
11:42	chouser	I'm sad we still don't have ubiquitous auto-indenters that never require manual tweaking.
11:44	hellofunk	chouser you mean a "global standard" on the art of proper indenting of clojure code? like a style guide?
11:44	Bronsa	+1 for maps over named args
11:45	hellofunk	maps are also quite nice for returning multiple values from a single fn. use them all the time now for that.
11:45	chouser	hellofunk: no, no, tools in all our text editors so we never half to worry about max width, indent amount, newline placement, etc.
11:45	chouser	s/half/have/
11:46	hellofunk	chouser well at some point a line is going wrap and there's nothing to be done about it.
11:47	chouser	hellofunk: right, but that should be a display-time thing that Does The Right Thing, rather than an edit-time decision that gets checked into source control.
11:47	chouser	Well, to soften that, not "should" but it seems like it might be possible and if so I'd love to see it in all editors.
11:47	hellofunk	chouser so in my example, if the line is going to wrap, the editor automatically places the new line after a function name rather than it's args, to minimize chances of a particular line wrapping, otherwise it would know not to do this.
11:48	hellofunk	and it might change newline position for parent forms to aid with this, otherwise, it wouldn't.
11:48	chouser	not to minimize the chances, but when displaying if it actually would wrap at your current terminal width, then display newlines and re-indent to make it look right.
11:49	chouser	and yes, push back up into parent forms as needed.
11:49	chouser	Basically a really nice pretty-printer with live editing capability. Sounds easy, right? :-)
11:49	hellofunk	chouser i see what you mean. couldn't that easily be added to Cider functionality somehow? doesn't seem too far beyond other crazy stuff emacs does.
11:50	hellofunk	though, i think the editor with the most power for that type of display/syntax interaction would be Cursive. cfleming can take note!
11:50	chouser	yes, I'm sure it's within reach of all extensible text editors. Maybe could even be written in such a way that all editors could use the same code.
11:51	Glenjamin	ideally tools could work on a cannonical representation check internally, but then display could vary based on preference
11:51	chouser	right. keeps sounding easier and easier.
11:51	Glenjamin	heh
11:52	hellofunk	we definitely support cfleming's comment about writing text itself is not the best way to represent programming ideas
11:52	chouser	well, maybe, though I actually think that's different.
11:53	mi6x3m	another one
11:53	mi6x3m	how do you call your listener fns_
11:53	chouser	There are benefits to writing the same stuff that we read, which is text.
11:53	mi6x3m	on-xyz
11:53	mi6x3m	xyz-listener?
11:53	mi6x3m	xyz-fn?
11:53	hellofunk	i mean everything we are talking about is how text writing or display gets in the way of actually implementing ideas
11:53	mi6x3m	well style is important hellofunk
11:54	hellofunk	no, i mean well beyond "style" because of being beyond "text" entirely
11:55	donbonifacio	anyone using test.check? I already have a random function, and I'm having trouble converting it to a generator
11:56	tcrayford____	donbonifacio: test.check generators aren't just random functions :(
11:56	hellofunk	to me, the initial attraction to lisp was about the improved relationship of an idea to how you could implement it. the symbols, patterns, homoiconicity, the whole works seemed closer to your idea factory, than say, churning out huge c++ template to get anything started. and i think you can get well beyond lisp and away from text entirely to work with ideas.
11:57	donbonifacio	tcrayford____: does that mean that I can't _incorporate_ my scenario?
11:58	tcrayford____	donbonifacio: if your scenario is a random function right now, you'll have to rewrite it in test.check's generator syntax
11:58	donbonifacio	can't to that, too complicated, would need a lot of work
11:58	donbonifacio	imagine that I'm testing a chess engine and I already have a funciona that generates games
11:59	tcrayford____	so you can incorporate it, but you'd have to lose shrinking
11:59	tcrayford____	which is most of the point of test.check
11:59	tcrayford____	shrinking comes out of the generators
12:00	tcrayford____	(well, or you can write your own shrinking logic)
12:01	donbonifacio	I see
12:02	arohner	does a/put! ever block? I'm confused by it claiming to be async, but also that core.async channels block when full
12:20	ghadishayban	Bronsa: I'm not sure the non-deterministic protocol dispatch is an issue anymore..
12:20	Bronsa	ghadishayban: ?
12:21	ghadishayban	If clojure.lang.MyMagicIReduce is also Iterable, as long as it there is an entry for MyMagicIReduce inside CollReduce as well,
12:21	ghadishayban	it doesn't matter that it is also iterable
12:22	ghadishayban	dispatch is only non-deterministic for superclasses AFAICT
12:22	Bronsa	ghadishayban: right, a prefer-dispatch would allow us to just prefer IReduce over Iterable rather than having to hard-code all the classes..
12:23	ghadishayban	Wouldn't it be better to simply add the classes? I'd think prefer-dispatch would be slow
12:23	Bronsa	ghadishayban: right now we have to extend MyCollection to CollReduce to make sure it will get routed through IReduce rather than through Iterable
12:24	Bronsa	ghadishayban: not sure that would be slower. there's a cache
12:25	ghadishayban	yeah it might not be. it's acceptable to me to extend MyCollection to CollReduce.
12:25	Bronsa	once the Class -> impl is determined once you can safely reuse that. it's invalidated only by other extend/prefer-dispatch like for multimethods
12:27	Bronsa	ghadishayban: yeah, I guess manually extending colls to CollReduce is good enough for now :) I certainly don't have the time to implement/test prefer-dispath
12:27	Bronsa	tch*
12:30	Bronsa	ghadishayban: btw I didn't understand how your comment related to the PV IReduce/1 question, were you just misremembering?
12:30	ghadishayban	brainfart
12:30	Bronsa	hah, ok
12:34	ghadishayban	I think the golden rule is, if you are IReduce/IReduceInit, you must be also extended to CollReduce to prevent ambiguity
12:36	ghadishayban	Despite the special-casing fast path of IReduceInit inside reduce/transduce, think of CollReduce as primary, and the IReduce as an optimization
12:39	maacl	Does it betray a lack of understanding of transients to ask why I cannot find a assoc-in! function anywhere?
12:41	TimMc	maacl: No, I don't think so.
12:42	TimMc	That seems like quite an omission.
12:43	maacl	TimMc: Yes, I thought so.
12:45	TimMc	I don't even see a Jira issue for it.
12:46	chouser	maacl: are all the maps in the path transients, or only the root? Or only the leaf?
12:48	TimMc	oh right
12:53	maacl	chouser: All of them.
12:54	chouser	maacl: And you're going to go through later and persistent! them all? Have you measure the perf of this approach?
12:56	maacl	chouser: Not yet. Just started, and failed to find the assoc-in! function, which made me wonder if I was missing something.
13:03	maacl	chouser: I will do some testing and see what the performance looks like.
13:05	wamilton	hi all, I have a lazy-seq problem where it's giving me an out of bounds exception instead of being lazy. Is this a normal problem?
13:12	crash_ep	it is if you are accessing an element beyond some collection's bounds
13:13	wamilton	crash_ep: right, but this is just the instantiation of the lazy-seq... I've not tried to get anything out afaict
13:14	crash_ep	what's your code look like
13:16	wamilton	crash_ep: like so https://gist.github.com/winmillwill/ace2ae2f2fa2eeb5d50d
13:18	wamilton	crash_ep: the data in question is a bunch of html tables with an xpath like this: /html/page/table hence my desire to iterate over just the tables
13:18	crash_ep	what table number are you trying to access when you call (tables) ?
13:19	crash_ep	and do you have n-1 elements in the collection at (-> root :content) to do so?
13:20	wamilton	I'm trying to get the first one, like so: (-> "short.html" root (tables 1) count)
13:23	crash_ep	The `tables` function is lazily recursive, but is it intended to be infinite? Eventually it will call `(tables root (inc n))` when n is the last element in the XML, at which point the _next_ call will cause an out of bounds exception.
13:23	crash_ep	Unless either you're careful to only take as many as you need, or your XML also contains an infinite number of values.
13:23	crash_ep	s/need/can/
13:25	wamilton	right, the xml data source is not infinite, still, I've got ~300 nodes at /html/page/table, so I don't see why the function is recursing in spite of the guarantee that it not do so until called again
13:26	wamilton	I screwed around and did the (do ...) and (print ...) wrapping and debugging, and n definitely went all the way up, which seems wrong
13:26	crash_ep	count
13:26	crash_ep	you are calling count on the thing returned from your tables function
13:27	crash_ep	that will try to evaluate the entire sequence
13:27	crash_ep	I think what you wanted is `(-> "short.html" root (tables 1) first)`
13:29	wamilton	oh, duh, so count causes the lazy sequence to basically be immediately un-lazy? industrious()
13:29	wamilton	s//?
13:32	wamilton	but yeah, even this causes an out of bounds: (-> "short.html" root (tables 1) first)
13:32	wamilton	nm, 0 indexing on nth, my bad
13:33	wamilton	crash_ep: thanks
13:33	crash_ep	np
13:34	schone	hello #clojure
13:35	schone	what happend gets assigned into these variables in a case where you write let ([var-a var-b var-c (.remove mymap id)] ….) if mymap returned null from java world ?
13:35	schone	im sorry, what would be assgiend into var-a var-b var-c
14:05	justin_smith	nickenchuggets: re "Lisp has origins in AI" - AI and Lisp came about together, in the mid 1950s. It would make as much sens to say AI has origins in Lisp.
14:06	mikerod	Is there anyway to add resources to the classpath under a certain name in leiningen, when they don't actually exist in a directory in that same location? (This may be confusing)
14:07	mikerod	I have some directory "my/resources/over/here/resource.txt", I want to get it on the :dev profile classpath just for REPL time and I want it to be just referred to as a "resource.txt" on the classpath
14:07	mikerod	it is sort of like how Maven shade has http://maven.apache.org/plugins/maven-shade-plugin/examples/resource-transformers.html#IncludeResourceTransformer
14:08	mikerod	but I'd like to "include the resource under a given name" only during REPL time
14:08	mikerod	I know it could be in my test resources to fix this issue. That is currently what I'm doing.
14:09	AdmiralBumbleBee	has anyone here worked with eclipse's windowbuilder and clojure without using seesaw? I'm curious how you are using the form and if you're using a java intermediary
14:13	dark4eg	how to create instance generic object use clojure?
14:13	justin_smith	mikerod: you can have as many resource paths as you like
14:14	dark4eg	(com.google.common.collect ImmutableList<String>.) ?
14:14	dark4eg	but this is not the correct version(
14:14	justin_smith	mikerod: example of dev only resource-paths addition here https://github.com/technomancy/leiningen/blob/master/sample.project.clj#L160
14:15	justin_smith	dark4eg: generics are a fiction
14:16	justin_smith	ignore the type
14:16	justin_smith	it's called "type erasure" from the point of view of the java compiler
14:16	dark4eg	thx
14:16	justin_smith	but we don't use the java compiler, so instead of having a type and erasing it, we just don't have a type
14:17	justin_smith	(all that said, it's probably still a good idea to make note of what type you are using that collection for, and stick to that one type)
14:17	mikerod	justin_smith: Yes, I mean that I'd like to change the classpath "location" of it.. this likely isn't possible
14:17	justin_smith	but there is no syntactic / structural aspect to that, because the jvm has no such concept
14:17	mikerod	I have a resource nested somewhere in a directory. I need it to be directly in the working directory for some other lib to find it
14:18	justin_smith	mikerod: yeah, I would just put it on the relative path I want it to be on, in it's own directory structure... but maybe there is some crazy hack? I wonder if it would actually be helpful though in the long run.
14:18	mikerod	justin_smith: probably not :P
14:18	mikerod	it would have just been smoother for the REPL stuff I'm doing here
14:18	justin_smith	oh, not just relative path, but directly in the working dir? that sucks
14:18	mikerod	but it isn't essential
14:19	mikerod	Yeah, I don't want to change the code that looks for it in working dir, it'll be in working dir in the "real" context
14:19	mikerod	but in my REPL context I just want to point elsewhere, but make it look like it is in the working dir
14:19	mikerod	I know its weird
14:20	justin_smith	hmm, I would attempt to abstract out the code that finds the thing, or add a classpath-relative path to look under
14:20	justin_smith	wouldn't "root level of classpath" be as good as "working dir" ?
14:20	mikerod	I was mostly curious. I just copied over some test resources for this to a test resources dir added to :resource-paths in a :dev profile
14:20	mikerod	justin_smith: I mean the "root level" when I said that
14:20	mikerod	example
14:21	mikerod	doing (clojure.java.io/resource "my-resource.txt")
14:21	justin_smith	right
14:21	mikerod	I'd want that to return non-nil
14:21	mikerod	not having to do (clojure.java.io/resource "some/nested/spot/my-resource.txt")
14:21	justin_smith	so make dev-resources/my-resource.txt and add dev-resources to resource-paths
14:21	justin_smith	that suffices right?
14:21	mikerod	yes
14:21	mikerod	just requires I copy files to that place
14:21	justin_smith	make a symlink if it needs to be in three places at once :)
14:21	justin_smith	or more than one even
14:21	mikerod	true
14:21	mikerod	so the answer is - just don't do something stupid like this :P
14:22	mikerod	and use the filesystem appropriately hah
14:23	justin_smith	well, stupid is relative, our development and deployment stacks are full of small stupidities, but at least we can be vigilant about smartening things when we can figure out how :)
14:24	mikerod	True
14:26	dark4eg	justin_smith (new com.google.common.collect.ImmutableList) -> No matching ctor found for class com.google.common.collect.ImmutableList
14:26	justin_smith	dark4eg: for starters, direct usage of "new" is considered depricated, use (c.g.c.c.ImmutableList. ...)
14:27	justin_smith	then, it looks as if there is no direct constructor for that class http://google-collections.googlecode.com/svn/trunk/javadoc/com/google/common/collect/ImmutableList.html
14:27	justin_smith	you should probably be using (ImmutableList$Builder.), manipulating that, then implementing and ImmutableList from that
14:28	justin_smith	any particular reason you are using this class instead of the Clojure built in immutable collections?
14:29	dark4eg	org.openqa.selenium.phantomjs
14:29	justin_smith	Ok
14:30	justin_smith	so (let [builder (com.google.common.collect.ImmutableList$Builder)] (doto builder (.add 1) (.add 2) (.add 3)) (.build builder))
14:31	justin_smith	that (or something very close to it) should get you an ImmutableList of (1 2 3)
14:31	justin_smith	oh, I missed a .
14:31	justin_smith	so (let [builder (com.google.common.collect.ImmutableList$Builder.)] (doto builder (.add 1) (.add 2) (.add 3)) (.build builder))
14:33	justin_smith	though in practice you likely just want (.addAll builder [1 2 3])
14:54	devn	,(range 0 1 0.1)
14:54	clojurebot	(0 0.1 0.2 0.30000000000000004 0.4 ...)
14:54	justin_smith	,3/10 the ratio of the devil
14:54	clojurebot	3/10
14:55	justin_smith	,(range 0 1 1/10)
14:55	clojurebot	(0 1/10 1/5 3/10 2/5 ...)
15:47	Pistahh	re
16:10	DomKM	I want to run a function to compile SCSS before uberjar creation. It seems like prep-tasks might be the right place to look but it isn't working as I'd expect. Any advice on how to create build steps with Leiningen?
16:25	dbacar	Hi everyone
16:27	justin_smith	DomKM: what isn't working as expected?
16:29	dbacar	hi I cannot find the keyboard shortcut for cider- show clojure source, any ideas?
16:29	nullptr	M-. runs the command cider-jump-to-var, which is an interactive compiled Lisp function in `cider-interaction.el'.
16:29	justin_smith	dbacar: it should be M-.
16:29	justin_smith	jynx
16:31	dbacar	thanks a lot
16:37	danielglauser	DomKM: prep-task runs a leiningen task, I believe the way to create those is through a plugin. Did you write a plugin?
16:39	danielglauser	DomKM: Here's a sample plugin: https://github.com/denofclojure/lein-validate
16:43	DomKM	https://www.irccloud.com/pastebin/iDRU6D2y
16:44	DomKM	oops, I seem to have just told IRCCloud to make a pastebin of that message
16:44	DomKM	sorry about that
16:44	justin_smith	it's readable enough there though
16:44	justin_smith	better that rather than multi line message here
16:44	DomKM	true :)
16:45	DomKM	anyway, the follow up to that is that another profile is required to turn off the built-in prep tasks: `:no-prep-tasks {:prep-tasks ^:replace []}`
16:59	danielglauser	DomKM: Weird. I'm sure I have a bit to learn about leiningen, recently started poking around the code.
17:01	danielglauser	DomKM: I wonder if the alias is already "used": https://github.com/technomancy/leiningen/blob/master/leiningen-core/src/leiningen/core/main.clj#L43
17:22	donbonifacio	in test.check, how could I make a generator that generates distinct collections from another collection? Example, with [1 2 3], it would generate [1], [1 2], etc
17:24	reiddraper	donbonifacio: check out `subset` in https://github.com/gfredericks/test.chuck#generators
17:25	reiddraper	donbonifacio: https://github.com/gfredericks/test.chuck/blob/master/src/com/gfredericks/test/chuck/generators.clj#L141-L149
17:26	donbonifacio	reiddraper: what If I'd like to specify the size of the new collection (for example, with another gen)
17:27	reiddraper	donbonifacio: have you read through https://github.com/clojure/test.check/blob/master/doc/intro.md and https://github.com/clojure/test.check/blob/master/doc/generator-examples.md?
17:28	donbonifacio	yes
17:28	donbonifacio	I still can't figure it out, may be missing something
17:29	donbonifacio	I could gen/shuffle and then take X, but can't find a gen that does the take
17:29	nullptr	gen/sized?
17:30	reiddraper	donbonifacio: i'll write you a simple example of exactly that
17:30	donbonifacio	also tried gen/elements, but couldn't generate a distinct vector
17:30	donbonifacio	also tried sized and resize
17:30	donbonifacio	maybe I'm just too tired :)
17:32	reiddraper	donbonifacio: (defn subgen [coll] (gen/fmap (fn [[shuffled len]] (take len shuffled)) (gen/tuple (gen/shuffle coll) (gen/choose 0 (count coll)))))
17:34	donbonifacio	that's it reiddraper, thanks :)
17:35	reiddraper	donbonifacio: np
17:35	reiddraper	you'll often see gen/tuple, gen/fmap and gen/bind used for more complex generators
17:39	donbonifacio	yes, your example is showing me some light
18:08	OscarZ_	is it easy to setup Clojure remote REPL server into some application ? i mean, i have access to the code.. i guess i need to listen to some port etc..
18:11	OscarZ_	java application of course
18:35	justin_smith	OscarZ_: you can use clojure.tools.nrepl.server/start-server Don't listen to an outfacing port unless you would like everyone to root your box
18:35	justin_smith	hell, only listen to a local port if you trust everyone with a login :)
18:35	justin_smith	you can use an ssh tunnel to make a secure nrepl connection
18:36	OscarZ_	hehe yes, thats a good point :)
18:36	OscarZ_	cool, so theres some library for that already
18:36	justin_smith	OscarZ_: that's the same lib lein uses for the "lein repl" task
18:37	OscarZ_	i was thinking.. if you have some simple API that uses POJOs for domain model.. is there an easy way to convert these into Clojure maps and other structures ?
18:37	justin_smith	amalloy_: picassoo is spamming, still (note the extra o, of course)
18:37	OscarZ_	a bit like Jackson JSON mapper works with Java classes and JSON
18:37	justin_smith	OscarZ_: ##(bean (java.util.Date.))
18:37	lazybot	⇒ {:day 2, :date 23, :time 1419377694183, :month 11, :seconds 54, :year 114, :class java.util.Date, :timezoneOffset 0, :hours 23, :minutes 34}
18:38	justin_smith	in general, if it uses standard getFoo / setFoo bean will work
18:38	OscarZ_	cool :)
18:38	justin_smith	though bean is a bit expensive (it is reflection based) and you can improve performance by making your own custom class based transformation
18:38	OscarZ_	ok, i dont worry about performance much in this case..
18:39	justin_smith	then for a standard pojo with your normal getters and setters, bean will just work
18:39	OscarZ_	was just thinking it would be cool to plug in to some java application and work on it with REPL, view and modify its state etc..
18:39	justin_smith	yup, clojure is a nice way to interact with the jvm
18:40	OscarZ_	whats this ## thingy called ?
18:40	justin_smith	"tell lazybot to evaluate an expression ##(println "hi") mid sentence"
18:40	lazybot	⇒ hi nil
18:42	OscarZ_	oh sorry.. i was after "bean"
18:42	justin_smith	haha, OK
19:20	akkad	ahh, it's an acronym: Common Lisp On Java Using Rich's Experience
19:28	justin_smith	well, it's not common lisp at all (scheme would be a closer comparison, but it isn't that either) and the name was chosen because it had a j (for jvm) and clr (for the clr) and sounded like a commonly used fp featuer (closure)
19:29	justin_smith	*feature
19:30	justin_smith	"The name was chosen to be unique. I wanted to involve c (c#), l (lisp)
19:30	justin_smith	and j (java)."
19:31	justin_smith	https://groups.google.com/forum/#!topic/clojure/4uDxeOS8pwY
21:06	gfredericks	justin_smith: doing clojure history research?
21:10	justin_smith	correcting what may in retrospect have been a joke
21:11	justin_smith	and picassoo is still at it
21:33	visof	hi guys
21:33	kenrestivo	his nose is not centered
21:33	kenrestivo	and everytihng is two dimensional
21:34	visof	there is something strange i can't figure it out, when i do (.field doc "Hello" "World") (.field doc "Hello" "Clojure") it's working, but when i do (map () {"Hello" "World" })
21:34	visof	there is something strange i can't figure it out, when i do (.field doc "Hello" "World") (.field doc "Hello" "Clojure") it's working, but when i do (map (fn [[k v]] (.field doc k v)) {"Hello" "World" "Hello" "Clojure"})
21:34	visof	don't work
21:35	andyf	what happens?
21:35	visof	can anybody help in this?
21:36	andyf	visof: There are many ways that it might not work, but you haven't told us what it does do when you try that.
21:37	visof	(.field doc k v) is orientdb API which set key and value for specific document, so what i meant by working is: it's setted else isn't setted
21:37	andyf	map is lazy
21:38	andyf	it will only call the function on elements of the sequence if you do something that consumes the return values
21:38	andyf	if you want side effects, consider doseq instead.
21:38	andyf	or put map inside (doall ...)
21:40	andyf	(dorun ...) would be somewhat better than (doall ...) in this case, since you don't care about the return values, but I'd recommend doseq over either of those.
21:41	visof	andyf: how can i pick k and v for hash in doseq?
21:41	andyf	(doseq [[k v] hash-map] (.field doc k v)) should do it, I think.
21:41	gfredericks	hi andyf
21:42	andyf	I was going to say "howdy gf", but that might not sound right.
21:43	gfredericks	~gf
21:43	clojurebot	Cool story bro.
21:43	gfredericks	~gf is greasy fries
21:43	clojurebot	Roger.
21:44	andyf	It reminded me of "girlfriend", which would definitely send the wrong impression
21:45	gfredericks	yeah
21:46	gfredericks	my name has mostly nonflattering variations
21:46	andyf	Grade school is a little weird at times when your last name is "Fingerhut" :-)
21:48	gfredericks	apparently Fingerhut is a sleazy company of some sort
21:51	andyf	A mail order company, but I haven't ever done business with them, and no relation (or none I know of). I heard that they were very good at figuring out how much credit they could extend to people of limited means, so that they could usually pay it back. Someone else bought it in early 2000s and started extending way more credit, and many didn't pay back their loans.
21:54	gfredericks	I once got an email with the subject "Infringement of Frederick's of Hollywood domain names
21:55	gfredericks	and only now looking back on it do I notice there's not necessarily any good reason to think the email came from anybody associated with the company
21:55	gfredericks	but the body just said "Your website does not seem to be developed, and I thought you might be willing to let it go for reimbursement of registration fees?"
21:55	andyf	You had fredericks.com or something?
21:56	gfredericks	no I think they've had that one for a long time
21:56	gfredericks	this was presumably about gfredericks.com
21:56	andyf	G. Fredericks of Hollywood
21:57	gfredericks	was about to make a joke about Gfredericks of Ghollywood but now I won't.
21:58	andyf	Man, that site is totally developed. I don't know what that email was talking about.
21:58	gfredericks	I'm thinking they didn't even look
21:59	gfredericks	just somebody scraping a whole bunch of squatter-looking dns entries
21:59	gfredericks	and sending out bulk emails to see what happens
21:59	gfredericks	the "Infringement of Frederick's of Hollywood domain names" subject in particular seems pretty suspicious -- what the heck is an infringement on a domain name?
22:00	kenrestivo	andyf: there is, as i recall, a rather large corporation named after you
22:01	kenrestivo	http://en.wikipedia.org/wiki/Fingerhut
22:01	andyf	Well, I think they came first :)
22:01	gfredericks	andyf was in fact named after the Fingerhut company
22:01	andyf	Yeah, my parent's owed them big time.
22:01	andyf	s/'//
22:02	gfredericks	wait can I pay off my mortgage this way?
22:03	andyf	Naming your kids for fun an profit (or at least avoidance of loss)
22:04	kenrestivo	there are many stories of corporations suing people who had legit rights to their domain name
22:05	andyf	In the USA, and probably other countries, you can sue any one for just about any reason. Doesn't mean you win.
22:05	kenrestivo	like the guy who was named mcdonalds who had mcdonalds.com.... until the lawywers attacked...
22:08	andyf	All right, another Eastwood linter just about ready to commit. Checking for wrong pre/postconditions.
22:10	gfredericks	wrong?
22:10	clojurebot	It can only be attributable to human error.
22:13	andyf	e.g. there's this fun find in the Criterium library: {:pre (>= 0 index 32)}
22:13	andyf	Never fails, but if you write it correctly as {:pre [(>= 0 index 32)]} it would never succeed.
22:15	andyf	I haven't found much else in the wild yet -- pre/postconditions are not terribly widely used.
22:16	TimMc	gfredericks: Some jerk once had their lawyer send me a cease and desist notice to me about my brainonfire.net website. I happened to be friends with an IP lawyer who sent them back a notice saying that they could be found guilty under cyberslapp provisions and thus fined up to $10,000 or something.
22:17	TimMc	amalloy_: Ban picassoo for spam?
22:18	gfredericks	TimMc: okay I'll come to you if I have any issues :P
22:18	TimMc	gfredericks: I felt very lucky, although honestly I could have just ignored them.
22:19	TimMc	Unfortunately I can no longer find the awesome response letter that was sent.
22:29	TEttinger	andyf, can you explain why that :pre thing in criterium works or doesn't work?
22:29	TEttinger	I hbave never used pre/post condition
22:30	yguan	is there a quick way to concat two vector? (into [] (concat v1 v2)) seems do it in O(n), subvec is quite quick, wish there is also quick way to do the concat also
22:31	sm0ke	,(concat [1] [2])
22:31	clojurebot	(1 2)
22:31	sm0ke	yguan: you want the result to be a vector also?
22:31	yguan	sm0ke: but it returns a seq, right? yeah...
22:31	yguan	sm0ke: vector to vector, all in vector
22:31	sm0ke	,(into [1] [2 3])
22:31	clojurebot	[1 2 3]
22:32	yguan	sm0ke: :)
22:32	AWizzArd	Note tho that this still is not O(1).
22:33	sm0ke	yep not at all, this should be worst than concat
22:33	sm0ke	but is quite concise
22:33	andyf	yguan: There is a core.rrb-vectors lib that can do vector concat in O(log n)
22:33	yguan	AWizzArd: thanks for mention that
22:34	yguan	sm0ke: actually, since no concat there, it's much better
22:34	sm0ke	,(source concat)
22:34	clojurebot	Source not found\n
22:34	yguan	andyf: thanks, I'll take a look
22:36	sm0ke	looking at the source of concat i wonder why (if-let ) is not used instead of a (let [s (seq x)] (if s..)
22:37	sm0ke	may be if-let is not available before concat?
22:38	sm0ke	anyhow it would be same end result i guess
22:38	sm0ke	,(macroexpand-1 '(if-let [x 1] x 1))
22:38	clojurebot	(clojure.core/let [temp__4386__auto__ 1] (if temp__4386__auto__ (clojure.core/let [x temp__4386__auto__] x) 1))
22:41	sm0ke	concat looks kind of horrible in terms of performance, its rescursive
22:41	sm0ke	i wonder if that was necessary
23:13	yguan	andyf: run some test over rrb-vector, it's LOT faster, thx
23:55	andyf	yguan: glad to hear it