#clojure log - May 01 2015

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0:00 justin_smith: TimMc: at least 4 victims

0:00 brehaut: 'surprised' has got to be an understatement

0:00 FOUR

0:00 and one was with a screw driver

0:00 what on earth

0:01 justin_smith: the stuff of nightmares, now I am sorry I shared it

0:02 brehaut: nightmares is the truth

0:03 brb looking at hilarious cat pictures to recover

0:07 cfleming: justin_smith: Did anything ever come of your error message categorisation crusade?

0:09 justin_smith: cfleming: got hired full time, so my free time kind of disappeared

0:09 cfleming: justin_smith: No worries, just wondering

0:09 justin_smith: though as I settle into the new routine I may come back to that project, because it is definitely worthwhile

0:09 after so long contracting from home, having a 9-5 is a big change

0:09 cfleming: Absolutely

0:10 Yeah, I bet

0:12 brehaut: justin_smith: ive done similar recently. suddenly my veggie garden is an overgrown mess

0:14 its kind of amazing where the time goes

0:18 TimMc: also there was that hobbit infestation

0:19 brehaut: acutally more common than you'd think

0:21 TimMc: Question for people who use Java at work: Is it important to you that artifacts be in Maven Central, or are you pretty free to point to other repositories?

0:21 because I am about done with trying to deploy there

0:22 (this might be the wrong time of day to poll)

0:25 cfleming: TimMc: In my last job we didn't care where the jars came from, but be aware that if something isn't in Maven central it's effectively invisible.

0:26 TimMc: cfleming: But can I reasonably tell Maven users "add the dependency this way" and tell them to point to clojars?

0:26 I know it won't show up in regular searches.

0:27 cfleming: TimMc: Well, you could have told us that, but YMMV - I'm not sure how common that is

0:32 TimMc: I think a lot of folks use a nexus server that has to be specifically configured for different upstream repos, so that would be a problem.

0:39 fowlslegs: How might I go from [ [ [0 1] [2 3] ] [ [3 4] [5 6] ] ] to [ [3 5] [7 9] ] with concurrency in mind?

0:41 justin_smith: via which rule?

1:04 TimMc: (constantly [[3 5] [7 9]]) :-P

1:24 arrdem: constant time, constant space, yep we're done here

4:01 kritzcreek: I want to learn Clojure but I'm coming from a functional background. Is there a book or tutorial that targets me as an audience?

4:21 wasamasa: that's a new one

4:21 usually people come to clojure *because* they want to learn functional programming

4:23 anti-freeze: Hi everyone. So, I'm a Clojure n00b and I'm trying to implement a generic uploader for some web software that allows, depending on some arguments uploading to public/uploads or anywhere. Currently, I'm using multimethods. Is there a better way to structure this? Here's the code: https://www.refheap.com/2c0b04a7c649610132ef7063a

4:23 Keep in mind that I haven't tested it and I have no idea if it works

4:24 Is there a way to group multimethods together or something?

4:25 Or am I taking the wrong approach?

5:19 guys?

5:54 octe: whenever i eval something that results in an error with cider connected to nrepl in emacs i get the regular cider-error buffer but also som kind of temporary buffer, form-initXXXXXXX.clj which i assume is what cider sends to nrepl

5:54 why do i get that buffer as a window?

6:43 noncom: in cursive how do i make the TAB to auto-ident instead of inserting tabs?

6:44 oh, this is described in the very getting started

6:49 was happy to early - the recommended Emacs Tab only makes it so that it does not insert tabs mid-line, but it still inserts tabs at the beginning

7:21 H4ns: clojurescript + websockets recommendations anyone? i found sente, but maybe something else is better?

7:22 bcn-flor: Has anyone worked with clojure.tools.analyzer ? Specifically, I'm interested if there is documentation for the returned AST structure, what fields are available for each :op .. ?

7:23 Bronsa: bcn-flor: http://clojure.github.io/tools.analyzer.jvm/spec/quickref.html

7:23 or http://clojure.github.io/tools.analyzer/spec/quickref.html if for some reason you're usint t.a rather than t.a.jvm

7:24 bcn-flor: Bronsa: How could I miss that ? I've been reverse-engineering it for 2 days :) Maybe a good idea to have that link in the tools.analyzer repository .. or is it there already ?

7:25 Bronsa: it's in the readme

7:27 bcn-flor: Bronsa: Yes, it's there allright, I've missed it somehow.. maybe because it's a link on a Heading. Anyway, thank you !

7:37 cfleming: noncom: It shouldn't use tabs

7:38 noncom: Check Settings->Editor->Code Style->Default Indent Options

7:38 noncom: cfleming: heeey, glad i we finally meet :)

7:39 i have a somewhat very specific question on cursive, on classloaders. idk if the answer is easy...

7:40 cfleming: noncom: Ok, shoot, but an email might be better, I don't have much time now

7:40 noncom: cfleming: ok, just briefly, look at this: https://github.com/bytedeco/javacv/issues/137

7:41 the thing is: it works in eclipse, but when i open the project in intellij, it does not acquire the native libs

7:42 cfleming: if you do not have much time now, i would be grateful, if you could look into this later, when you have some..

8:01 jlbhshluekg: .

8:01 did usa intelligence supply isis with weapons like they did with al-qaeda to justify creating wars?

8:01 did usa excute the creative mess in the middle east like they said they will, does the creative mess include explosions with uncertain responsibles to create wars?

8:01 plz, send my qs to help limiting usa & israel aggression against others& may then lessen number of people killed in the middle east.

8:01 .did usa intelligence supply isis with weapons like they did with al-qaeda to justify creating wars?

8:11 wasamasa: ...

8:11 that bot already appeared on #ruby

9:03 TimMc: They make the rounds.

9:04 justin_smith: anti-freeze: protocols seem closer to what you want than multimethods

9:05 each protocol can define as many methods as it likes

9:05 anti-freeze: justin_smith: I'm not really working on types though

9:05 justin_smith: anti-freeze: ::foo is as arbitrary as a custom defrecord is

9:05 the idea is that you have something (whether a type or a weird keyword) that captures a range of behaviors

9:06 usually when I make a defrecord the purpose is to group together implementations of some protocol

9:07 anti-freeze: justin_smith: Would I be able to do something like, (upload-file! :uploads "somewhere/" file) with a protocol while having the more generic (upload-file!) default method?

9:07 justin_smith: it wouldn't be :uploads - you'd need some record that represents what :uploads means now

9:08 anti-freeze: justin_smith: I'm confused. Defining a record for example (defrecord Uploader) seems a little javaish. I'm defining a data type with behaviours?

9:08 justin_smith: but it would mean the same thing - the keyword is used to identify a specific impl, the record would do the same

9:09 anti-freeze: justin_smith: Hmm. I defined a macro that works a little like this. (grouped-methods :foo (upload-file [path filename] (,,,))) Is that I bad solution?

9:10 I can then define a whole load of grouped multimethods

9:10 justin_smith: that seems like an ad-hoc way to get a protocol to me

9:10 anti-freeze: justin_smith: Yea, I thought it would be. So, I'm just confused about what type I would define it as. Any ideas?

9:11 justin_smith: anti-freeze: the type is just a marker for a group of protocol method impls

9:11 anti-freeze: justin_smith: Can you further explain? Is there any examples anywhere?

9:11 justin_smith: often in a case like this it wont even have fields (but you can abstract over what would be multiple types with one by having fields (eg. a particular API key in your case)

9:12 anti-freeze: (defrecord Uploader [base-path]) Something like that?

9:12 justin_smith: right

9:12 if more than one uploader would be the same, except their base-paths differ

9:12 anti-freeze: justin_smith: Yes

9:13 justin_smith: That's what I'm going for

9:13 justin_smith: Same type, different base-path

9:13 justin_smith: I'm looking for a good example - I know I have one somewhere

9:14 but I think you get what I am saying now

9:14 anti-freeze: justin_smith: I just feel like this is a bad example of functional programming. You know, defining actions as types

9:14 justin_smith: anti-freeze: the types are just groups of actions

9:15 parameterized, but not stateful

9:15 that seems perfectly functional to me (very similar to functors in ml)

9:16 anti-freeze: justin_smith: I see. What if I just wanted to group the actions, without any data? Just (defrecord Something) ? I suppose they do work like functors, I just tend to see those (from my limited experience) as polymorphic functions based on type. Like type case statements

9:16 justin_smith: exactly

9:17 anti-freeze: justin_smith: My reservation was that I'm only operating on one type

9:17 justin_smith: and yeah, (defrecord Foo [] MyProtocol ...) is pretty much a functor

9:18 anti-freeze: rather than a bunch of different types with one method. I'm working on a parameter of only one type

9:18 Not even that, just on one type

9:19 justin_smith: sounds like that could be a function with two args

9:20 anti-freeze: justin_smith: This is a pain. The idea was that I wanted a generic version of upload-file that will upload anywhere and a upload-file that uploaded to the resources/public/uploads directory only

9:20 But also provided a method to delete from that directory too

9:20 With the same mechanic

9:21 justin_smith: Yeah. I'd say a protocol with a single record implementing it, with a location field in the record to parameterize it

9:21 seems the simplest abstraction to encapsulate that

9:22 anti-freeze: justin_smith: So lets say I'm using the function now. What is it that I pass to it. (upload-file! (Uploader.)) ?

9:22 justin_smith: (def ^:private uploads-key (Uploader.))

9:23 then use uploads-key the same way you did before

9:23 anti-freeze: justin_smith: Ah, I see. How would I define default behaviour?

9:23 justin_smith: have a parameter to uploader that the behavior can switch on

9:24 or let the uploader arg be optional, and use a default instance if not provided

9:25 oh - it wouldn't be a private def any more I don't think

9:25 because a caller would provide a specific instance

9:26 anti-freeze: justin_smith: I could just set the default instance to nil and check for that right? Is this really a better solution than my ad-hoc multimethod grouping though? Seems to add more complexity

9:26 Or is the complexity of the ad-hoc method just implicit

9:27 justin_smith: the advantage is you have a properly reified grouping of methods, the cost is defining placeholder types that can own those method groups

9:27 I'd say that's a pretty low cost

9:27 you could even use reify instead of defrecord actually

9:28 just reify an impl of the protocol for each group you want to make

9:28 anti-freeze: justin_smith: How would I do that? Sorry for the noobiness, I haven't needed to do that before.

9:28 justin_smith: reify is simple https://clojuredocs.org/clojure.core/reify

9:29 it's simpler than defining a record

9:30 anti-freeze: justin_smith: How would it even work without defrecord?

9:30 justin_smith: What am I refying?

9:30 justin_smith: reify reifies protocols

9:30 anti-freeze: justin_smith: So I would define a protocol to what exactly?

9:31 justin_smith: ,(defprotocol Foo (upload [this]) (delete [this]))

9:31 ,(reify Foo (upload [this] "I am now uploading") (delete [this] "I am now deleting"))

9:32 you call (delete *1) to delete via its method

9:32 (upload *1) to upload, etc.

9:32 where *1 is the def I forgot to wrap the reify in :)

9:33 anti-freeze: justin_smith: I'm lost. This is a hopeless cause. Thanks for your help anyway

9:33 justin_smith: anti-freeze: wait, what in my example above was confusing?

9:33 Foo is the protocol for uploaders

9:34 then the real version of the reify is (def uploader (reify Foo ...)) then you call (uploader uploader ...) (delete uploader ...)

9:34 anti-freeze: justin_smith: Ah, wait I think I got it. So, I would (defprotocol Foo (upload [])...) (def uploads (reify Foo (upload []...))) and then call (upload uploads ...)

9:34 justin_smith: exactly

9:34 anti-freeze: justin_smith: Justin, you are the man

9:34 justin_smith: reify creates an anonymous impl of a protocol

9:34 haha

9:35 anti-freeze: justin_smith: Where can I buy you a beer?

9:35 justin_smith: next clojure/conj likely, unless you end up in pdx

9:36 anti-freeze: Probably wont be happening. I live across the world

9:38 justin_smith: Seriously, thanks for your help. You're becoming my goto guy on this IRC

9:45 One last thing, how would I implement default behaviour? Straight in the protocol?

9:47 justin_smith: anti-freeze: protocols don't contain any sort of implementation

9:48 anti-freeze: you could do a default via a wrapper function

9:48 eg use an uploader if provided, otherwise the default uploader

9:48 anti-freeze: Ah, I see. Ok, cool, thanks

9:49 justin_smith: otherwise we get into the rabbit hole that is inheritance

9:49 kwladyka: I am doing http://www.4clojure.com/problem/156 and... i can find solution in The Internet, but... how to code solution myself - this is the question. I tried, but i failed... i found how people did this in The Internet, but still... i don't understand how they know to do that in that way... What exatly are you thinking in your head and how do you know what to use?

9:49 anti-freeze: justin_smith: And god knows I've been there before

9:50 justin_smith: kwladyka: do you know how to construct a hash-map?

9:50 kwladyka: i don't know how to think about Clojure and problem to solve to solve this problem, it't more about guess, then really know what i am doing :)

9:51 justin_smith: kwladyka: I need to head out, but I'll be back later. I am sure there are other folks here that can help.

9:52 kwladyka: justin_smith, like there http://clojuredocs.org/clojure.core/hash-map:)

9:52 justin_smith, ok thx

9:52 justin_smith: if you had apply, plush hash-map, plus map, you could do it that way

9:53 ,(apply + (map inc [1 2]))

9:53 something like that, but with your data

9:53 &(apply + (map inc [1 2]))

9:53 lazybot: ⇒ 5

9:53 kwladyka: http://clojure.org/cheatsheet - there is so many possibilites - how do you know which one you can use?

9:54 i am not asking about solution directly, i am asking how should i think in Clojure to create solutions myself which wouldnt be guess like know. Now i am guessing how to solve problems.

9:54 dnolen: kwladyka: well most people that know Clojure pretty well know most of the useful functions off the top of their heads. So when confronted with a problem like this you think of the operations you'll need to get to the result.

9:55 kwladyka: 1) you need to repeat a value 2) you need to create a map from two sequences

9:55 kwladyka: dnolen, so its only matter about learn all this functions?

9:55 dnolen: so find a function that does 1), and find a function that does 2) - done

9:56 kwladyka: well know the functions and learning to think in a functional way which takes some work, but it really is like learning words and how to make sentences

9:56 so it's less about memorization and more about how to make sentences

9:56 kwladyka: i am very confuse when to use zipper, seq, maps, sets, vectors, lists category of functions from http://clojure.org/cheatsheet

9:56 how to know which one from there match from problem?

9:57 *with problem

9:57 dnolen: kwladyka: just memorizing a list wouldn't help me. It's just easier to know what you want and to look for a function that does that

9:58 kwladyka: dnolen, but i have often problems with types of data

9:58 i want use something but i have to convert something and i know i have to convert because i get an error in console, not because i know

9:59 dnolen: kwladyka: well you can't expect to pick this stuff up quickly if you don't have a functional background it takes work and if it's a bit slow going, that probably meanas you're really trying.

10:00 kwladyka: so there is no thinking like: i have 2 data IN lists, i want have 1 data map OUT. So i have to use functions from lists and map. I should use function from everywhere?

10:00 dnolen: kwladyka: I already gave you hints with 1) and 2)

10:01 kwladyka: you need 1) to repeat a value 2) take two sequences and produce a map from them

10:01 functions exists for both 1) and 2), you just need to find them

10:01 kwladyka: dnolen, so when you solving problem you dont thinking about "type" of function like it is from "zippers", "seq" or "map"?

10:02 dnolen: kwladyka: I do think about the types

10:03 1) is something that looks like Any -> [Any], and 2) is something that looks like [Any] -> [Any] -> Map(Any,Any)

10:03 kwladyka: dnolen, mmm soe for this example http://www.4clojure.com/problem/156 should i looking functions from vector and maps? Or zippers, seq? Or all this 4? or mayby somewhere else?

10:04 dnolen: kwladyka: vectors don't help you repeat a value. zippers aren't relevant. yes to maps. yes to functions that take seqs, especially one that takes 2 seqs into a map.

10:05 kwladyka: good luck :)

10:05 kwladyka: dnolen, heh so mayby should i read something about cateory of functions to know better which category match better with what i want achive?

10:07 dnolen, because now i can find function like you descrbe but in chaots way, i dont really know where they can be, it is more brute force

10:07 *chaos way

10:08 dnolen, thank your for your advices

10:41 anti-freeze: justin_smith: Ok, so I implemented it... Its a terrible solution

10:42 justin_smith: https://www.refheap.com/28a2c38a1c2c53d13d2128007

11:05 gfredericks: TimMc: int or Object is common I guess, yeah; what I meant was int or Integer

11:09 TimMc: gfredericks: The result is the same though with Object.

11:17 gfredericks: TimMc: "result" meaning the behavior of the clojure compiler w.r.t. type-hints etc?

11:28 does `lein javac` require a jdk or does it work with a jre somehow?

11:30 kaiyin: it seems the `identity` arg never gets used in this watcher?

11:30 https://gist.github.com/kindlychung/804028ca4aa5509ab3d4

11:30 TimMc: gfredericks: "result" w.r.t. angry programmers

11:31 matthavener: is it possible to use a go block in a cljs repl?

11:33 dnolen: matthavener: only if the JS environment you're target supports some form of async dispatch. That said I have seen some minor issues that need looking into in cljs.core.async at the REPL.

11:34 * gfredericks is working on a non-official public leiningen docker repo thing

11:34 matthavener: hm, ok, I'm just using figwheel with chrome. it works OK if i'm calling a function that uses a go block, but if I try to create a go block from the repl itself its trying to resolve a Var.. maybe I need to tune my repl namespace

11:46 edbond: ,(= 0M 0)

11:46 &(= 0M 0)

11:46 lazybot: ⇒ false

11:47 edbond: &(== 0M 0)

11:47 lazybot: ⇒ true

11:59 kaiyin: why do i get this error here? https://gist.github.com/kindlychung/c05aa1c9ba9ac2b481f0

12:05 xonev: kaiyin: you need to return true if the state is valid: (set-validator! sarah #(if (:age %) true (throw (IllegalStateException. ":age required"))))

12:05 your function is always returning nil when it doesn't throw an exception

13:06 darthdeus: given a map of sets, such as {:foo #{1 2} :bar #{3 4}} where the values in the sets are unique, can I somehow easily find a key to which a given value in any of the sets belong? like to get :bar for 4

13:14 hiredman: you need to invert the index

13:15 (apply merge-with into (for [[k v] m v v] {v #{k}}))

13:16 ,(apply merge-with into (for [[k v] {:foo #{1 2} :bar #{3 4}} v v] {v #{k}}))

13:16 oh

13:16 TMA: &(apply merge-with into (for [[k v] {:foo #{1 2} :bar #{3 4}} v v] {v #{k}}))

13:16 lazybot: ⇒ {2 #{:foo}, 1 #{:foo}, 3 #{:bar}, 4 #{:bar}}

13:16 Bronsa: rip clojurebot

13:17 hiredman: ,(apply merge-with into (for [[k v] {:foo #{1 2} :bar #{3 4}} v v] {v #{k}}))

13:17 sritchie: hey all - weird issues with cljsbuild. looks like figwheel and cljsbuild aren’t respecting my reader conditionals

13:17 clojurebot: {1 #{:foo}, 2 #{:foo}, 4 #{:bar}, 3 #{:bar}}

13:17 hiredman: ,(get (apply merge-with into (for [[k v] {:foo #{1 2} :bar #{3 4}} v v] {v #{k}})) 4)

13:17 sritchie: fighwheel’s throwing errors on clojure-only functions

13:17 clojurebot: #{:bar}

13:17 sritchie: is figwheel supposed to be ready for 1.7.0-beta2?

13:18 TMA: (doc =)

13:18 clojurebot: "([x] [x y] [x y & more]); Equality. Returns true if x equals y, false if not. Same as Java x.equals(y) except it also works for nil, and compares numbers and collections in a type-independent manner. Clojure's immutable data structures define equals() (and thus =) as a value, not an identity, comparison."

13:19 TMA: (doc ==)

13:19 clojurebot: "([x] [x y] [x y & more]); Returns non-nil if nums all have the equivalent value (type-independent), otherwise false"

13:39 brainproxy: is there a way to use a macro inside defn so that a var args form expands correctly? when I try it I'm getting an exception: "Parameter declaration ... should be a vector"

13:39 which makes sense, i.e. the defn macro doesn't know about my macro

13:40 Chousuke: you should write a macro that expands into the form of defn you want instead.

13:40 brainproxy: alright, I can do that, it just feels clumsy; i have to write the macro, then invoke it

13:40 that is, to get the top-level defn

13:41 nevermind, i see it will work out fine since I need to do this in several places, so i can make it quite general purpose

13:41 Chousuke: it's less clumsy than the alternative, which probably involves eval :)

13:45 noncom: what is the best way to map through all permutations of elements of N collections like if i have (range 0 9) and (range 0 9) , i map over [0 0] [0 1] [0 2] [0 3].. [1 0] [1 1] [1 2].. .. [8 0] [8 1] [8 2] ... [9 9] ?

13:51 bensu: nocom: that's a cartesian product, try with http://stackoverflow.com/questions/18246549/cartesian-product-in-clojure

13:51 puredanger: ,(for [i (range 9) j (range 9)] [i j])

13:51 clojurebot: ([0 0] [0 1] [0 2] [0 3] [0 4] ...)

13:51 puredanger: insert whatever you like in the body of course

14:21 brainproxy: Chousuke, this seems to fit the bill: (defmacro defn-expand [dname & varg-forms] `(defn ~dname ~@(map macroexpand-all varg-forms)))

14:37 justin_smith: ~/

14:37 clojurebot: Huh?

14:37 justin_smith: ~/

14:37 clojurebot: Excuse me?

14:38 justin_smith: sorry

14:46 elvis4526: Why when we map over a array of maps, each item isn't returned in the function as a map?

14:46 its returned as an array I think

14:47 justin_smith: depends what function you are applying to those maps I guess

14:47 ,(map seq [{:a 0 :b 1} {:Foo :bar}])

14:47 clojurebot: (([:a 0] [:b 1]) ([:Foo :bar]))

14:47 elvis4526: well in the function handler, the item appears to be

14:47 yes

14:47 exactly

14:47 Why it's not {:a 0 :b 1}, etc..

14:48 justin_smith: ,(map (comp (partial into {}) seq) [{:a 0 :b 1} {:Foo :bar}])

14:48 clojurebot: ({:a 0, :b 1} {:Foo :bar})

14:48 justin_smith: so you can change your function to do an into at the end (as one option)

15:10 noncom: hi! anyone interested in JME3 + JavaCV + Clojure, have a look at the example integration project: https://github.com/noncom/cursive-jme-jcv and please report issues

15:25 tcrayford____: PSA: java 7 is EOL today. y'all should upgrade to java 8

15:31 wasamasa: oh really?

15:32 * wasamasa checks

15:32 wasamasa: I'm on 7.45-1 ._.

15:33 time to upgrade

15:37 ahuegyua: .

15:37 did usa intelligence supply isis with weapons like they did with al-qaeda to justify creating wars?

15:37 did usa excute the creative mess in the middle east like they said they will, does the creative mess include explosions with uncertain responsibles to create wars?

15:37 plz, send my qs to help limiting usa & israel aggression against others& may then lessen number of people killed in the middle east.

15:37 .did usa intelligence supply isis with weapons like they did with al-qaeda to justify creating wars?

15:37 wasamasa: ,ops

15:38 clojurebot: #error{:cause "Unable to resolve symbol: ops in this context", :via [{:type clojure.lang.Compiler$CompilerException, :message "java.lang.RuntimeException: Unable to resolve symbol: ops in this context, compiling:(NO_SOURCE_PATH:0:0)", :at [clojure.lang.Compiler analyze "Compiler.java" 6543]} {:type java.lang.RuntimeException, :message "Unable to resolve symbol: ops in this context", :at [clojure.l...

15:38 wasamasa: ...

15:47 justin_smith: a

15:54 amalloy: oops. kicked wrong person

15:55 wasamasa: ;; no comment

15:57 hiredman: /win 18

16:44 gfredericks: `docker run --rm=true -it gfredericks/leiningen lein repl`

17:25 xemdetia: this isn't the shell you are looking for

17:34 arohner: what's the name for clojure's variable name style?

17:34 i.e. foo-bar-bbq, rather than fooBarBbq

17:35 the latter is camelCase, the former is ....?

17:35 Bronsa: arohner: kebab-case

17:35 arohner: ha

17:36 Bronsa: http://c2.com/cgi/wiki?KebabCase

17:36 andyf: http://en.wikipedia.org/wiki/Letter_case#Special_case_styles

17:36 multiple names, also spinal-case and Train-case

17:37 sorry, Train-Case is when every word is capitalized, which is definitely not typical Clojure style

17:37 Wow, people love making names for things.

17:38 TEttinger: spinal-case (kebab-case), Train-Case

17:38 heh

17:38 https://en.wikipedia.org/wiki/Letter_case#Special_case_styles has an odd list

17:44 scottj: a relevant clojure library https://github.com/qerub/camel-snake-kebab

17:45 it calls Train-Case HTTP-Header-Case though, not as cool :(

17:47 gfredericks: Camelbab case

17:47 scottj: (oh I misunderstood Train-Case)

17:55 sritchie: cemerick: is cljsbuild ready for 1.7.0-beta2?

17:55 cemerick: thinking of the conditional reader stuff… was trying to port today and found that the cljs compiler was trying to read in clj only functions from a cljc namespace

18:00 darthdeus: re-posting here from #clojurescript since there doesn't seem to be many people there :\ if anyone has a sec, I'd really appreciate any tips http://stackoverflow.com/questions/29995440/how-can-i-mark-methods-created-with-reify-with-export-so-that-the-closure-c

18:02 amalloy: darthdeus: (doto (Object.) (aset "foo" (fn ...)) (aset "bar" (fn ...))) maybe? i don't really do any cljs

18:03 darthdeus: amalloy: hmm that sounds it could work, as long as the aset doesn't get optimized somehow :\

18:07 sritchie: darthdeus: maybe just make an exported wrapper fn

18:07 darthdeus: sritchie: how?

18:08 I'm trying to export this object to wrap my own API

18:08 sritchie: your api is “foo”, “bar”, yeah?

18:08 darthdeus: sritchie: yeah, my API generally is x = some_init(); and then x.foo(); x.bar();

18:09 sritchie: if you want the same names, make a new namespace like “myproj.exports” and add (defn foo [x] (myproj.core/foo x)), etc

18:09 (defn ^:export foo [x] (myproj.core/foo x)) rather

18:09 darthdeus: but that would export functions

18:09 I don't want functions like foo(x);, I need them on the object so they can be called like x.foo()

18:09 sritchie: ah, sorry, got it.

18:10 darthdeus: funny that I can't google anyone trying to do this :\

18:10 sritchie: I think amalloy’s approach is what you want

18:10 om-tools does something like this for registering mixins

18:10 https://github.com/Prismatic/om-tools/blob/00ccab13f2d536c4996cab7a2e85ef46f668a525/src/om_tools/core.cljx#L93

18:11 darthdeus: hmm, interesting

18:43 rksm_: Heyho, is there a tool to automatically rewrite Java to clj code? I'm not looking for anything fancy, just something that does a syntactic transform of control structures?

18:45 j-pb: I don't think so.

18:45 you can wrap java code though and then gradualy rewrite it.

18:47 amalloy: rksm_: that is a hard problem

18:48 j-pb: amalloy: depends on how happy you are with the readability of that code

18:48 amalloy: j-pb: even if you're not concerned it's not easy

18:48 rksm_: amalloy: sure but I'm not looking for the hard solution, just something that makes rewriting java code a little bit less annoying

18:48 j-pb: amalloy: I'm pretty sure once we get advanced clojure tooling there might be some bytecode->clj debugger decompiler

18:49 so you could just emit java bytecode, and then decompile it as clojure

18:49 amalloy: rksm_: there is no such thing. something that automatically attempted to do that rewrite would make it more annoying, not less, because you'd get complete garbage out

18:49 j-pb: I actually wonder what happens when you decompile clojure code as java :)

18:49 (inc amalloy)

18:49 lazybot: ⇒ 266

18:52 j-pb: rksm_: you could write something like that though, I'd be happy to help :)

18:52 rksm_: I'd start out with a java parser in instaparse

18:53 rksm_: j-pb: if it gets too annoying I might dabble with java parser, it'll sure be an interesting project :) need to get other stuff done first though

18:53 j-pb: yeah

18:54 give me a call if you do though, :D, I'm currently writing a datalog compiler with a small nanopass framework, and so far I'm quite happy with how it works :D

18:54 rksm_: j-pb: will do :)

19:37 lvh: Does aleph work with friend? Specifically friend relies fairly heavily on binding conveyance. I think it's fine, but I can't actually check. Also, netty does a bunch of threading stuff itself, so...

21:49 whodevil: hello all, I'm curious why people are using #_ for comment instead of ; now?

21:57 * whodevil uses his internet searching prowess to figure out that it is a reader macro that ignores the form, which makes it a more complete removal.

21:57 whodevil: sweet

21:58 gfredericks: whodevil: also nice that you can use #_#_ to comment two forms

22:01 whodevil: neat

22:40 ed-g: is it possible to connect to Postgresql from clojure.java.jdbc using a unix domain socket?

22:51 whodevil: I've connected to postgres, but I was using the java interopt and a pooling library.

22:51 so I guess that doens't really help

22:57 crocket: Is clojure a good language to use on android?

22:57 Scala is known to be a good language to use on android.

23:03 tomjack: java parser in instaparse? :) there are already battle-tested java parsers out there

23:06 crocket: tomjack, Is that a response to my question?

23:06 tomjack: no

23:07 for that, I presume you've already read http://clojure-android.info/ ?

23:07 crocket: tomjack, yes, I did

23:17 Hell!!

23:42 Is clojure on android mature?

23:42 enough?

23:43 TEttinger: crocket: currently proguard can't be used with clojure

23:43 (at least as far as I know)

23:43 so the app size may be larger than desired

23:43 crocket: How large?

23:44 TEttinger: proguard works with scala, that I can confirm. I know they're working on some tweaks to the clojure build process to allow proguard, no idea on ETA

23:45 it depends how much of a standard lib you would use

23:45 proguard just removes parts of jars that never get called, right? but clojure does compilation stuff at runtime so it currently can't tell what will be used

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