#clojure – 2015-08-09

2015-08-09

00:01	rpaulo	grrr, cat again
02:22	domokato	hm, when i put in a hex value, 0xFFBEBEBE for example (for an argb color), I can't convert it to an int because I get a "value out of range" exception
02:23	domokato	,(int 0FFBEBEBE)
02:23	clojurebot	#<NumberFormatException java.lang.NumberFormatException: Invalid number: 0FFBEBEBE>
02:23	domokato	er
02:23	domokato	,(int 0xFFBEBEBE)
02:23	clojurebot	#error {\n :cause "Value out of range for int: 4290690750"\n :via\n [{:type java.lang.IllegalArgumentException\n :message "Value out of range for int: 4290690750"\n :at [clojure.lang.RT intCast "RT.java" 1198]}]\n :trace\n [[clojure.lang.RT intCast "RT.java" 1198]\n [sandbox$eval47 invokeStatic "NO_SOURCE_FILE" 0]\n [sandbox$eval47 invoke "NO_SOURCE_FILE" -1]\n [clojure.lang.Compiler eval "...
02:24	hiredman	,(Integer/toHexString Integer/MAX_VALUE)
02:24	clojurebot	"7fffffff"
02:25	hiredman	,(unchecked-int 0xFFBEBEBE)
02:25	clojurebot	-4276546
02:26	domokato	sweet, thanks!
02:27	domokato	man, that's not even in the cheatsheet
02:28	hiredman	if everything was on whatever cheatsheet, the cheatsheet would just be a listing of everying in clojure.core
03:09	irctc	Hello, quick question : I am trying to import core.async in my REPL : (require '[clojure.core.async] :as async) what's wrong with this ? (runtime exception unable to resolve symbol: async)
03:10	irctc	this seem to work though at least doesn't throw an error : (require '[clojure.core.async])
03:11	irctc	aah nevermind, it's me being stupid : (require '[clojure.core.async :as async])
04:03	irctc	Hello, can someone help me debug my protocol ? I can't find the right way to call it https://www.refheap.com/7739d3471f05b3681fde6b0bf
04:04	justin_smith	irctc: the first argument to every protocol method must be the object implementing the protocol
04:04	justin_smith	irctc: traditionally we name it "this"
04:05	justin_smith	irctc: also, the protocol method is a function, it is not an argument to the object implementing the protocol
04:05	irctc	Do you mean I should do (add-subscriber subscription-store id context) instead ?
04:05	irctc	hmm thanks just let me 30 secs to process it ^^
04:05	justin_smith	irctc: that, and you also need to change the declaration and definition of add-subscriber
04:06	justin_smith	the declared args must include the this arg
04:06	irctc	ooh I see
04:07	irctc	every time, I should have this as first arg ok
04:07	irctc	and then how will I call it ? like I pasted here ?
04:07	justin_smith	yes
04:07	irctc	justin_smith: thanks a lot I'm going to try that now
04:07	justin_smith	it's OK not to call the arg "this" - eg. if you don't use the arg, it can be called _
04:09	irctc	Oh I saw that convention thanks again. I shouldn't need it right ? (the memory store will have a redis store counterpart in case it matters-
04:13	irctc	justin_smith: Seem to work ! Thanks a ton !
10:58	lodin_	Is it possible to construct a value x such that (let [[& {a :a}] x] ...) makes sense?
11:06	lodin_	Or as a test, can (is (nil? (let [[& {a :a}] x] a))) fail?
12:17	justin_smith	lodin_: what would an ampersand in a let destructure even mean?
12:19	AimHere	,(let [[& {a :a}] x] a)
12:19	clojurebot	#error {\n :cause "Unable to resolve symbol: x in this context"\n :via\n [{:type clojure.lang.Compiler$CompilerException\n :message "java.lang.RuntimeException: Unable to resolve symbol: x in this context, compiling:(NO_SOURCE_PATH:0:0)"\n :at [clojure.lang.Compiler analyze "Compiler.java" 6704]}\n {:type java.lang.RuntimeException\n :message "Unable to resolve symbol: x in this context"\n ...
12:19	AimHere	,(let [[& {a :a}] 10] a)
12:19	clojurebot	#error {\n :cause "Don't know how to create ISeq from: java.lang.Long"\n :via\n [{:type java.lang.IllegalArgumentException\n :message "Don't know how to create ISeq from: java.lang.Long"\n :at [clojure.lang.RT seqFrom "RT.java" 535]}]\n :trace\n [[clojure.lang.RT seqFrom "RT.java" 535]\n [clojure.lang.RT seq "RT.java" 516]\n [clojure.core$seq__4116 invokeStatic "core.clj" 137]\n [clojure.co...
12:20	AimHere	,(let [[& {a :a}] {:foo 10 :bar 20}] a)
12:20	clojurebot	nil
12:21	justin_smith	,(let [[& {a :a}] [:a 0]] a) ; wut
12:21	clojurebot	0
12:21	justin_smith	it makes me kind of unhappy that that works
12:40	lodin_	justin_smith: Hmm, I thought I tried that one.
12:40	lodin_	Apparently I didn't.
12:45	lodin_	,(let [{a :a} (seq [:a :A])] a)
12:45	clojurebot	:A
12:50	lodin_	but,
12:50	lodin_	,(let [{a :a} [[:a :A]]] a)
12:50	clojurebot	nil
12:51	lodin_	Presumably because [] is associative, and there's no :a in the vector.
12:51	justin_smith	,(let [[{a :a}] [[:a :A]]] a)
12:51	clojurebot	nil
12:51	lodin_	,(let [[{a :a}] [(seq [:a :A])]] a)
12:51	clojurebot	:A
13:34	kwmiebach	Hi. What does the cljr extension stand for? it is mentioned here: http://clojure.org/reader#The Reader--Reader Conditionals
13:37	hyPiRion	clojure clr probably
13:37	hyPiRion	http://clojure.org/clojureclr
13:41	kwmiebach	thank you. and my link above was broken, it should be http://clojure.org/reader#The%20Reader--Reader%20Conditionals
13:49	kwmiebach	yeah probably :cljr is reserved for the dotnet implementation in reader conditionals
14:02	gfredericks	are there any strong opinions about indenting styles for top-level reader conditionals?
14:08	justin_smith	gfredericks: I lament bitter tears over emacs not being able to indent them like hash-maps
14:10	gfredericks	what is backing the emacs identation stuff currently?
14:22	justin_smith	gfredericks: the magic happens here https://github.com/clojure-emacs/clojure-mode/blob/master/clojure-mode.el#L638
14:45	lentils_	anyone here experienced with enlive?
14:52	lodin_	,(let [[a :as x b] [1 2]] a)
14:52	clojurebot	1
14:52	lodin_	,(let [[a :as x b] [1 2]] x)
14:52	clojurebot	[1 2]
14:52	lodin_	,(let [[a :as x b] [1 2]] b)
14:52	clojurebot	#error {\n :cause "Unable to resolve symbol: b in this context"\n :via\n [{:type clojure.lang.Compiler$CompilerException\n :message "java.lang.RuntimeException: Unable to resolve symbol: b in this context, compiling:(NO_SOURCE_PATH:0:0)"\n :at [clojure.lang.Compiler analyze "Compiler.java" 6704]}\n {:type java.lang.RuntimeException\n :message "Unable to resolve symbol: b in this context"\n ...
14:52	lodin_	^^^ Bug or features?
14:52	lodin_	*feature.
14:52	justin_smith	lodin_: nothing can follow :as
14:53	lodin_	justin_smith: Why not?
14:53	justin_smith	because after ":as x" the destructure ignores all input
14:53	lodin_	justin_smith: But why?
14:53	justin_smith	so anything can follow it I guess, it just won't do anything
14:54	justin_smith	lodin_: because it was written that way. The destructuring code is weird.
14:54	gfredericks	lodin_: it's an impl detail, and is confusing, but doesn't prevent anything
14:54	lodin_	It's not clear from the docs. But when I read "http://clojure.org/special_forms#Special Forms--Binding Forms (Destructuring)-Vector binding destructuring" I see that you could interpret "Finally, ..." as meaning "in the last position".
14:54	gfredericks	i.e., (let [[a b :as x] [1 2]] b) is what you really want, right?
14:55	lodin_	I actually prefer to put :as first.
14:55	lodin_	I always do that with maps.
14:56	gfredericks	yeah I just mean that it means the same thing
14:58	lodin_	gfredericks: Right.
14:58	lodin_	Do you think a patch to allow :as anywhere, or at least in the beginning, would be accepted?
15:00	justin_smith	I doubt it
15:01	gfredericks	more likely a patch that throws if you put anything after the :as clause
15:01	justin_smith	yeah
15:01	gfredericks	which won't give you what you want of course
15:02	justin_smith	the only reason :as doesn't need to be last in a map is because maps are unordered I guess
15:02	lodin_	I don't really understand the rationale for requiring :as to be the last thing.
15:02	gfredericks	I haven't thought about it till not but
15:03	gfredericks	you could argue that the normal mode of sequential destructuring where each thing is positional gets interrupted in a confusing way if you allow arbitrary clauses in between
15:04	justin_smith	destructure is already insane and hairy as code, it would be worse I bet if it had to accept :as anywhere
15:04	gfredericks	it's visually more confusing because in [a b :as c d e f]
15:04	gfredericks	c and d are very different
15:04	lodin_	Yeah. Which is why I also gave the option of "in the beginning".
15:05	gfredericks	same for [:as c a b d e f]
15:05	lodin_	I agree that it would be confusing to have keyword in the middle there, particularly when the subforms are not just symbols.
15:07	lodin_	Interesting. I find the leading style to be much clearer, because when you have even just slightly non-trivial destructuring the :as clause gets hidden far to the right.
15:07	justin_smith	lodin_: I always put :as on its own line
15:08	lodin_	like [a {foo :bar {this :that}} :as v].
15:08	justin_smith	like that, but with a newline before :as
15:09	lodin_	Yeah, I was giving an example of v being pushed to the left. Maybe I'm bad at reading destructurings, but I need to look back left to see what v actually contains.
15:10	lodin_	If I get :as v in the beginning, I know that "what I'm reading now is part of v", instead of having to backtrack to update when v started.
15:11	lodin_	justin_smith: It makes sense to put :as on it's own line. I should try that.
15:11	lodin_	I've tried to not use multiline destructurings, because I find it disrupting when reading the let. But I guess that's something I can get used to.
15:12	lodin_	justin_smith: How do you layout the init-expr that follows the binding-form when binding-form is multiline?
15:14	justin_smith	usually on the same line as the :as clause, depending on how the rest of the let is laid out
15:16	lodin_	Ah. Lately, when I have let forms that are too long (usually because it's a vector with long names in it), I have put the init-expr on the next line, but indented.
15:20	gfredericks	are macros just a lot harder to write in cljs and that's just the end of the matter?
15:20	gfredericks	(w.r.t. symbol expansion)
15:46	justin_smith	I've definitely noticed that things that work in clojure macros sometimes don't work in cljs ones
15:47	gfredericks	I'm starting to think that you just can't use the autoexpansion feature of ` anymore
15:47	gfredericks	which I'm sure encourages simpler macros
15:48	justin_smith	gfredericks: time to port hygeinic macros from scheme
15:58	amalloy	gfredericks: you mean instead of syntax-quote you just get backquote?
16:00	gfredericks	amalloy: what's backquote?
16:00	amalloy	like form other lisps
16:00	amalloy	*from
16:00	gfredericks	oh I'ven't another lisp
16:01	amalloy	just like, `(a b c) returns (a b c) instead of (foo/a foo/b foo/c)
16:02	gfredericks	yeah, you only get the unquoting and the gensym features
16:02	gfredericks	but what this means in real life is that you still have the symbol expansion feature, it just usually does the wrong thing
16:02	gfredericks	e.g. `(* 2 3 7) is wrong I assume
16:10	gfredericks	I think I'm wrong about that, but I have no idea why
16:10	gfredericks	I.e., I'd assume that expands to ##`(* 2 3 7)
16:10	lazybot	⇒ (clojure.core/* 2 3 7)
16:10	gfredericks	and clojure.core/* doesn't exist in cljs
16:29	aconz2	off topic to discuss how to find jobs as a soon-to-be college grad?
16:34	gfredericks	geography might (or not?) be relevant to that question
16:37	aconz2	currently in Maryland, 90% sure I'll be in Tennessee in 6 months, but ideal is remote
17:10	gfredericks	does anybody understand maven and/or clojure's maven setup well enough to figure out why this commit broke `mvn test`? https://github.com/clojure/test.check/commit/adb0883101e9bb3216539f1f597f6c3075c251f6
17:14	gfredericks	I can't tell if it fails while trying to run some kind of cljs thing, or fails because there are now extra files under src/main/clojure/
17:18	gfredericks	this must have something to do with the pom.contrib thing
17:20	hiredman	well, that is a project.clj for lein, likely what is in the maven pom is out of sync with the changes to project.clj
17:20	gfredericks	hiredman: it's also a file renaming
17:21	gfredericks	looks like it's the extra cljs files under /src/test/clojure that are doing it
17:22	gfredericks	I'm guessing this is controlled by the clojure-maven plugin
18:18	tmtwd	would there be a way to print the value at the key of y in this example?
18:53	justin_smith	tmtwd: which?
18:54	tmtwd	http://pastebin.com/Brw6mEZA
18:55	tmtwd	nvm mind though, I think its impossible/unimportant to do what I wanted to do
18:55	zardoz2	if 3.7V means about 50% of the charge is still there (does it?) , can I rely on it always meaning roughly that, regardless of the age of the battery and the number of cycles?
18:55	zardoz2	uh wrong channel
19:30	tmtwd	so, assoc-in is for vectors, and assoc is for hashes?
19:33	justin_smith	tmtwd: assoc and assoc-in are both for associative collections, associative collections include vectors and hash-maps
19:33	justin_smith	,(assoc [] 0 :a)
19:33	clojurebot	[:a]
19:33	tmtwd	but they are not interchangeable, i'm trying to see the difference
19:33	justin_smith	,(assoc-in [] [0 0 0] :a)
19:33	clojurebot	[{0 {0 :a}}]
19:34	justin_smith	tmtwd: assoc-in does a series of nested assoc
19:34	justin_smith	tmtwd: both default to create a hash-map with nil, but are able to set a numeric index on a vector
19:34	justin_smith	,(assoc [] 0 :a)
19:34	clojurebot	[:a]
19:35	justin_smith	,(assoc-in [[[]]] [0 0 0] :a)
19:35	clojurebot	[[[:a]]]
19:35	justin_smith	,(assoc nil :a 0)
19:35	clojurebot	{:a 0}
19:36	tmtwd	but, if I have this: (def users [{:name "James" :age 26} {:name "John" :age 43}]), this fails : (assoc users [1 :age] 44)
19:36	tmtwd	i need to use assoc-in in that case
19:36	justin_smith	tmtwd: right, that needs to be assoc-in
19:36	tmtwd	oh I see
19:36	justin_smith	but that isn't because of vectors versus hash-maps
19:36	tmtwd	assoc-in is more "recursive"
19:36	justin_smith	right
19:36	justin_smith	it digs in
19:36	tmtwd	or its like a "deep" version of assoc
19:37	justin_smith	exactly
19:37	tmtwd	cool thanks
19:37	justin_smith	tmtwd: this is incredibly valuable when you have nested immutable data structures
19:39	tmtwd	i see
19:41	justin_smith	because otherwise you end up writing a lot of boilerplate to get the structures out and put the other stuff in and rebuild it...
20:47	jefelante	Is it a bad idea to use a transducer to write an EDN file for data that gets put on the channel and put it back as-is? https://gist.github.com/anonymous/623164e2ffbbec86432f
20:51	justin_smith	jefelante: you could use mult/tap instead
20:51	jefelante	so tap1 = file writer and tap2 = processor?
20:51	justin_smith	right
20:52	justin_smith	also, the fact that you only have one channel means you can't retrieve the data in parallel
20:52	justin_smith	maybe you actually want that
20:52	jefelante	i dont really understand
20:53	justin_smith	jefelante: you have a single data processing pipeline, where every task is independent, and they could otherwise be done in parallel
20:53	jefelante	oh right
20:53	justin_smith	so you've artificially slowed down your processing (unless there is a pragmatic reason to only make one request at a time)
20:53	jefelante	so with mult/tap, I could have the file writer and the processor happening concurrently
20:54	justin_smith	yes, but with a different design you could be doing all the downloads concurrently
20:54	justin_smith	whether that's an improvement is another can of worms of course
20:54	jefelante	right, i see what you mean
20:55	jefelante	is there another benefit to mult/tap besides just working concurrently? the thing i'm wondering is if maybe its foolish to introduce a transducer that has a side effect
20:55	justin_smith	jefelante: an idiom I sometimes use is (dotimes [i parallelism] (go ...)) so that the number "parallelism" decides how many parallel data pipelines are created
20:56	justin_smith	jefelante: transducers and side effects are fine, but with mult/tap the two tasks can go at their own speed
20:56	justin_smith	which may or may not be a good thing...
20:56	justin_smith	but usually if one can finish much faster, you'd like it to do so
20:56	jefelante	ok cool
20:57	justin_smith	jefelante: also, your task (storing the data on disk as you do the transactions) is something I am doing in my project at the day job right now
20:58	justin_smith	we are using kafka which stores all messages for a configurable time period on disk
20:58	justin_smith	and then using transit to encode the body of the messages
20:59	jefelante	ive read about kafka, but i have this issue where i have trouble understanding something complicated (like kafka) unless i make the mistakes that necessitated building that thing
20:59	jefelante	first
20:59	justin_smith	heh, you have a lot of mistakes (or learning one way or another) before you could use kafka, most likely
20:59	justin_smith	distributed systems are very hard
20:59	justin_smith	I'm still very bad at them...
21:00	jefelante	yea, speed isn't an issue for me since i'm rewriting a python script that is plenty fast and runs sequentially, but i'm doing it to try and learn how a larger/async system might work
21:00	justin_smith	me trying to do hammock driven development on my latest project: http://i.imgur.com/8ryWyNJ.gifv
21:01	jefelante	it makes one request every ~15 minutes, extracts some information, and occasionally makes additional follow up requests based on that information
21:01	justin_smith	jefelante: yeah, in that case do the linear version first, and be aware of your options if you want options for speeding it up in the future
21:02	justin_smith	jefelante: also, though mongo has a bunch of gotchas, it is very easy to use it to store a map of vanilla clojure data as a document for a system like yours
21:02	justin_smith	with a bit of the fiddly stuff about using files taken care of
21:03	jefelante	ahh that's an interesting point
21:07	jefelante	justin_smith: thanks
21:16	tmtwd	I have an atom http://pastebin.com/HFjCJNZF and I want to assoc such that a new item is appended with a new value
21:16	tmtwd	whats the best way to achieve this?
21:16	justin_smith	update-in / conj
21:16	tmtwd	ah
21:18	justin_smith	,(update-in {:items [{:item "program in clojure"}]} [:items] conj {:item "yolo"})
21:18	clojurebot	{:items [{:item "program in clojure"} {:item "yolo"}]}
21:18	justin_smith	or with clojure 1.7, there is also update
21:18	justin_smith	,(update {:items [{:item "program in clojure"}]} :items conj {:item "yolo"})
21:18	clojurebot	{:items [{:item "program in clojure"} {:item "yolo"}]}
21:19	tmtwd	cool
21:19	tmtwd	that worked :)
21:19	tmtwd	thanks
21:20	axsk	hey, i need a macro which expands (mymacro a b c) to "a b c" (i need a macro here, as i dont want to eval the symbols, right?) but cant get there since hours. anyone has an idea?
21:21	namra	,'(a b c)
21:21	clojurebot	(a b c)
21:22	justin_smith	,(defmacro symstring [& args] (clojure.string/join \space args))
21:22	clojurebot	#'sandbox/symstring
21:22	justin_smith	,(symstring a b c foo)
21:22	clojurebot	"a b c foo"
21:23	justin_smith	axsk: the thing to remember is that the macro gets the literal form as its input, and should return the form that should be evaluated.
21:28	axsk	wow im surprised by the ease of the answer, (though i still dont understand :>) will come back if i cant work it out, thanks a lot
21:28	justin_smith	axsk: it's not a hard macro to figure out :)
21:28	justin_smith	I mean in terms of seeing what it does
21:28	justin_smith	of course macros are hard, period
21:30	justin_smith	axsk: the args to the macro are a sequence of symbols (thanks to the & destructuring), and the macro simply puts those symbols into a string
21:30	justin_smith	,(symstring (+ 1 1) a b (inc 0))
21:30	clojurebot	#error {\n :cause "Unable to resolve symbol: symstring in this context"\n :via\n [{:type clojure.lang.Compiler$CompilerException\n :message "java.lang.RuntimeException: Unable to resolve symbol: symstring in this context, compiling:(NO_SOURCE_PATH:0:0)"\n :at [clojure.lang.Compiler analyze "Compiler.java" 6704]}\n {:type java.lang.RuntimeException\n :message "Unable to resolve symbol: symst...
21:30	justin_smith	,(defmacro symstring [& args] (clojure.string/join \space args))
21:30	clojurebot	#'sandbox/symstring
21:30	justin_smith	,(symstring (+ 1 1) a b (inc 0))
21:30	clojurebot	"(+ 1 1) a b (inc 0)"
21:30	justin_smith	it's literally using the input form
21:32	axsk	(clojure.string/join \space (a b))
21:32	axsk	,(clojure.string/join \space (a b))
21:32	clojurebot	#error {\n :cause "Unable to resolve symbol: a in this context"\n :via\n [{:type clojure.lang.Compiler$CompilerException\n :message "java.lang.RuntimeException: Unable to resolve symbol: a in this context, compiling:(NO_SOURCE_PATH:0:0)"\n :at [clojure.lang.Compiler analyze "Compiler.java" 6704]}\n {:type java.lang.RuntimeException\n :message "Unable to resolve symbol: a in this context"\n ...
21:32	axsk	,(clojure.string/join \space ('a 'b))
21:32	clojurebot	""
21:32	justin_smith	axsk: those are function calls
21:32	axsk	,(clojure.string/join \space ['a 'b])
21:32	clojurebot	"a b"
21:32	axsk	ah ok
21:32	justin_smith	there you go
21:32	justin_smith	,(clojure.string/join \space '(a b))
21:32	clojurebot	"a b"
21:33	axsk	guess i got it. read so much about syntax quoting and unquoting, that i forgot that args is a seq of SYMBOLS :)
21:33	justin_smith	axsk: yeah, sometimes you have to think outside the "syntax quote" box. If you are not evaluating any args, you don't need syntax-quote
21:34	justin_smith	axsk: imho a good macro tutorial would start with list operations, and only introduce ` after the list operations get tedious, so that it's clear that ` is not magic (and why we actually use it)
21:35	TEttinger	justin_smith: I believe brave clojure is that way
21:35	gfredericks	my macros talk did that
21:35	justin_smith	gfredericks: awesome
21:35	gfredericks	~` is not magic
21:35	clojurebot	Ack. Ack.
21:35	gfredericks	~`
21:35	clojurebot	` is not magic
21:35	TEttinger	~~
21:35	clojurebot	~ is how you get factoids from me
21:37	perif	hi all
21:37	TEttinger	hey perif
21:39	justin_smith	TEttinger: today I ended a nethack game that had like 20 hours of total play time - I was in the astral plane, had made it to one altar, and was about to try a second altar
21:40	justin_smith	TEttinger: neutral monk, first two wishes were the eye of the aethiopica and the orb of fate
21:41	TEttinger	I am not very good at nethack
21:41	TEttinger	I would recommend brogue if you aren't totally bound to a true terminal
21:42	justin_smith	TEttinger: oh, what all that means is I was within 10 minutes of winning the game, after about 20 hours playing, and made a stupid mistake and game over
21:42	TEttinger	haha
21:42	TEttinger	well next time
21:42	justin_smith	by the end, I had 300+ hitpoints plus a magic item that cuts all damage in half
21:42	justin_smith	so effectively over 600 hp
21:49	tmtwd	http://pastebin.com/YbhmTiT6 how come the js/alert isn't executed when I call this functions?
21:50	justin_smith	tmtwd: this doesn't answer your question, but you never need a do inside defn like that
21:50	tmtwd	hm okay when do I use do then?
21:51	justin_smith	tmtwd: inside if or for
21:51	justin_smith	or other contexts that only take one expression
21:51	tmtwd	or cond?
21:51	justin_smith	sure, yeah
21:52	justin_smith	tmtwd: that code is weird because line 3 doesn't do anything at all
21:52	justin_smith	update creates a new collection, but you don't do anything with it
21:53	tmtwd	oh
21:53	justin_smith	so it's as if it wasn't done at all
21:53	tmtwd	I thought since atoms were mutable we could change them
21:53	justin_smith	you can, but that's not how
21:54	tmtwd	would I use assoc-in then?
21:54	justin_smith	tmtwd: you would use swap
21:54	tmtwd	oh of course
21:54	justin_smith	and then you would need to figure out what to do in the swapping function
21:55	justin_smith	I guess you want to take list-of-items and put it inside a hash-map under the key :items?
21:55	tmtwd	no I want to take the value of @upcoming-item and append it to @list-of-items (with a key of :item)
21:56	tmtwd	(def list-of-items (atom {:items [{:item "program in clojure"} {:item "finish web app"} {:item "solve euler problems"}]}))
21:57	justin_smith	so something like (swap! list-of-items conj {:item @upcoming-item})
21:57	justin_smith	nope, not quite
21:57	justin_smith	(swap! list-of-items update :items conj {:item @upcoming-item})
21:58	justin_smith	,(def list-of-items (atom {:items [{:item "program in clojure"} {:item "finish web app"} {:item "solve euler problems"}]})))
21:58	clojurebot	#'sandbox/list-of-items
21:58	justin_smith	,(def upcoming-item (atom "yolo"))
21:58	clojurebot	#'sandbox/upcoming-item
21:58	justin_smith	,(swap! list-of-items update :items conj {:item @upcoming-item})
21:58	clojurebot	{:items [{:item "program in clojure"} {:item "finish web app"} {:item "solve euler problems"} {:item "yolo"}]}
22:01	tmtwd	almost works
22:01	justin_smith	what's missing?
22:03	tmtwd	i get this instead: (def list-of-items (atom {:items [{:item "program in clojure"} {:item "finish web app"} {:item "solve euler problems"} {:item {:item "yolo"}}]}))
22:03	tmtwd	an extra :item
22:03	justin_smith	tmtwd: well chang {:item @upcoming-item} to @upcoming-item
22:04	justin_smith	I didn't know what was in upcoming-item and I just made a random assumption (that was wrong)
22:05	tmtwd	oh, ok
22:05	tmtwd	I'll just get my repl out
22:05	justin_smith	tmtwd: if you get that result, just change {:item @upcoming-item} in my code to @upcoming-item and it will work
22:06	justin_smith	but yes, always have a repl open if you are coding clojure
22:06	tmtwd	justin_smith, yup tried that, the compiler did not like that
22:07	tmtwd	justin_smith, okay got it :)
22:08	tmtwd	justin_smith, you were right
22:44	gfredericks	dnolen: something about the closure-library upgrade in the recent cljs release broke test.check; is there an easy way for me to try out various commits from closure-library?
22:44	gfredericks	(i.e., to git-bisect the closure-library project by running test.check)
22:45	dnolen	gfredericks: I can't think of an easy way to do that.
22:45	dnolen	gfredericks: what is the problem you're seeing?
22:46	dnolen	the only thing I can think of is something about the PRNG we use
22:47	gfredericks	dnolen: well this is the new code with the hand-rolled PRNG
22:47	gfredericks	dnolen: something's undefined at a particular point, which feels like it could be distant from the root cause
22:47	dnolen	gfredericks: still then would be goog.math.Long thing
22:48	gfredericks	right; I didn't see any recent changes to goog.math.Long itself; I'll start adding asserts to the code to track down the root cause location
22:49	dnolen	gfredericks: and you think this is a GCL bug because the error originates from there?
22:49	gfredericks	dnolen: because explicitly using the older GCL version with new CLJS works fine
22:49	dnolen	ah interesting
22:52	dnolen	gfredericks: in ClojureScript repo, in script/closure-library-release there's a script for local Maven install of GCL
22:53	gfredericks	dnolen: okay cool, I'll use that if it comes to it
22:58	gfredericks	dnolen: looks like this returns nil https://github.com/clojure/test.check/blob/master/src/main/clojure/clojure/test/check/random/longs.cljs#L56
22:59	gfredericks	seems to be an easy workaround if I replace with (long/fromNumber 1)
23:01	gfredericks	yep everything's passing now
23:07	gfredericks	I will probably just leave it at that; should I file a ticket?
23:07	gfredericks	I've never been confident that I was actually doing interop the right way
23:07	gfredericks	GCL-interop, rather
23:38	devn	Does anyone here run their production apps with `lein trampoline run`?
23:39	devn	How are people feeling about AOT these days? I've continued to wonder over the years: to AOT, or not to AOT.
23:39	devn	(when you have plenty of room for a choice)