2013-04-20
| 00:19 | gfredericks | tieTYT: that also checks that it's not false |
| 00:20 | tieTYT | right |
| 00:38 | Raynes | ibdknox: http://dl.dropbox.com/u/23745600/Screenshots/oNCd.png How did my vim end up with light table's icon? |
| 01:57 | Raynes | You're all boring. |
| 01:57 | azkane | :( |
| 02:32 | sztamas | \quit |
| 04:08 | Netfeed | what's the best way to do "raw" sql in clojure? is there a library where i don't have to work with abstractions and can work directly with the sql? |
| 04:10 | callen_ | Netfeed: jdbc or korma. |
| 04:14 | noprompt | oh m'god. media queries... |
| 04:15 | Netfeed | iv'e looked into jdbc, but i've not really got how i should best do stuff like custom insert and such, best thing i've found is do-commands and i'm not really sure if i can use the parameterized things with it. (i'm not sure how to explain it, i more or less want to do something like (do-commands "insert into foo (bar) values (?)" "baz") but a bit more advanced |
| 04:17 | ddellacosta | Netfeed, check out the tests for some examples if you haven't already: https://github.com/clojure/java.jdbc/blob/master/src/test/clojure/clojure/java/test_sql.clj |
| 04:18 | ddellacosta | (for jdbc at least) |
| 04:18 | ddellacosta | maybe that'll give you what you need…maybe not. |
| 04:20 | Netfeed | maybe, i'll take a look, jdbc seems to be nice until you need to do some custom things |
| 04:20 | ddellacosta | oh, sorry, I guess you saw that, you were talking about do-prepared |
| 04:20 | ddellacosta | I was just checking this out too |
| 04:20 | ddellacosta | https://github.com/clojure/java.jdbc/blob/master/src/test/clojure/clojure/java/test_jdbc.clj |
| 04:21 | ddellacosta | it looks like you can do parameterized stuff from the examples there, but not sure again if it's enough for what you want. |
| 04:22 | Netfeed | oh, yeah, do-prepared might be what i need |
| 04:22 | Netfeed | thank you |
| 04:23 | ddellacosta | hope it helps. |
| 04:30 | Netfeed | yeah, that worked, only thing it doesn't seem to do is RETURNING |
| 04:32 | Netfeed | ah, might be another function for that |
| 04:33 | Netfeed | yeah, there was, great |
| 05:45 | noprompt | e |
| 05:58 | clj_newb | Hi, to perform N function execution, which is better, dotimes? |
| 05:59 | naeg | Guess that depends on what your functions are doing? e.g. do they have side effects, etc. |
| 06:00 | clj_newb | yeah, are sending signals to external systems |
| 06:01 | naeg | sounds like dotimes to me |
| 06:02 | clj_newb | cool, I also think is the more appropriate but just wondering it there was a more suitable way |
| 06:03 | clj_newb | thansk naeg |
| 06:09 | naeg | am I the only one who thinks a visualization of code debugged with tools.trace.deftrace would be great? here's what I mean: http://i.imgur.com/qOiiXdE.png |
| 06:09 | naeg | it's very ugly right now, but wondering whether there is something to that others could need to |
| 06:09 | naeg | too* |
| 07:06 | iamdrw | @noprompt what's wrong with media queries? |
| 10:05 | kmic | Jak tasiemiec. |
| 10:14 | clj_newb | Hi, anyone using langohr? By merely following their examples messages don't get publish in rabbitmq |
| 10:15 | clj_newb | no errors, and in logs (rabbitmq) I can see that the connection is performed |
| 10:20 | gdev | ,(contains? :a []) |
| 10:20 | clojurebot | #<IllegalArgumentException java.lang.IllegalArgumentException: contains? not supported on type: clojure.lang.Keyword> |
| 10:25 | gdev | ,(clojure-version) |
| 10:25 | clojurebot | "1.5.0-RC6" |
| 10:25 | kmic | , (contains? [1] 0) |
| 10:25 | clojurebot | true |
| 10:26 | ejackson | (use 'tradedesk.bootstrap) |
| 10:26 | ejackson | ooops |
| 10:31 | gdev | ,(contains? {:doo "doo"} :poo) |
| 10:31 | clojurebot | false |
| 11:42 | Jambato | hi, I wanted to know whether you can access some global variables in a function |
| 11:42 | Jambato | if yes, does it involve some namespace tricks? |
| 11:43 | naeg | Jambato: just put a def on the top of the file and you can access it from within that file with no problem |
| 11:43 | naeg | also from outside with namespace/var |
| 11:43 | Jambato | very well |
| 11:44 | Jambato | thank you naeg |
| 11:44 | naeg | np |
| 11:45 | naeg | just ask again if you can't get it to work |
| 11:46 | zilti | I'm currently trying to use Friend with Compojure, but all I get is "Exception in thread "main" java.io.FileNotFoundException: Could not locate ring/util/request__init.class or ring/util/request.clj on classpath". |
| 11:47 | naeg | this basically means it can't find ring - did you add it to the dependencies of your project and :require it in the file you're accessing it? |
| 11:49 | zilti | naeg: I've added compojure as a dependency which requires ring, and when removing the require-statement from my core.clj I can run the application using lein-ring |
| 11:49 | zilti | So, no, currently I haven't explicitly declared or required ring anywhere. |
| 11:52 | naeg | never used Friend or ring, so dunno |
| 11:55 | cemerick | This is cute: https://gist.github.com/cemerick/5426430 |
| 11:55 | cemerick | (Only the first type specified in extend-protocol can be specified by an expression...) |
| 11:56 | ebaxt | is there a way to "invert" a vector [:foo :bar :baz] => :foo :bar :baz? |
| 11:57 | no7hing | ?(reverse [:foo :bar :baz]) |
| 11:57 | Bronsa | cemerick: I'm more surprised by the fact that it works even just for the first type than that it doesn't work for the others |
| 11:57 | no7hing | @ebaxt: ah sry, i understood reverse |
| 11:58 | cemerick | Bronsa: a must for array types *shrug* |
| 11:58 | tmciver | ebaxt: if you're trying to use the vector contents as args to a fn, use apply. |
| 11:58 | zilti | Hmm I now explicitly added ring-core to my dependencies and explicitly required ring.util.request, but even then it seems to be unable to find that one... |
| 11:59 | cemerick | oddly, the broken sample is in some code I wrote *years* ago that used Clojure 1.3, but I can't get it to work with 1.3 now. |
| 11:59 | ebaxt | tmciver: Thanks, I know how to do it in a function, but I'm trying to share some parameters on the calling side (does that make sense?) |
| 12:00 | weavejester | zilti: Have you included ring-core 1.2.0-beta2? |
| 12:01 | Bronsa | cemerick: right, but I think it's more likely that it works by accident rather than it being a bug |
| 12:01 | zilti | weavejester: I manually included ring-core 1.1.8, but I just deleted ~/.m2 and re-fetched the dependencies for that project, and something seems to fetch 1.2.0-beta1 |
| 12:01 | Bronsa | cemerick: it would be difficoult to distinguish between protocol function implementation and expressions to evaluate in order to get a class |
| 12:01 | weavejester | zilti: It might be Friend doing that |
| 12:02 | Bronsa | difficult* |
| 12:02 | weavejester | zilti: ring.util.request is only available in 1.2.0 |
| 12:02 | zilti | weavejester: Isn't that paradox? Since it's friend complaining that ring.util.request is missing |
| 12:02 | cemerick | Bronsa: not it's not: they're pairs |
| 12:02 | ebaxt | I have an enlive template and I want to use the same selector/fn pair in a deftemplate and in a macro (deftemplate …. [:p] (h/content "foo")) and (some-macro (html/at nodes [:p] (h/content "foo"))) |
| 12:02 | cemerick | oh, oh, nm |
| 12:03 | weavejester | zilti: No. The latest Friend depends on Ring 1.2.0. The ring.util.request namespace is only in Ring 1.2.0. If you've forced the dependency to Ring 1.1.8, then when Friend tries to get ring.util.request, it won't find it. |
| 12:03 | cemerick | anyway; that code definitely worked at some point. Maybe in 1.2? I don't remember the timelines of Clojure releases back that far |
| 12:04 | zilti | weavejester: Thanks, now I've placed friend as first dependency right after clojure itself, and now it works. |
| 12:05 | Bronsa | cemerick: not necessarily, it could be done by partitioning each (inc (count (keys (:sigs the-protocol)))) but then you're forcing users of extend-protocol to implement every function of the protocol |
| 12:09 | ebaxt | tmciver: Here is what I'm trying to do https://www.refheap.com/paste/13791 |
| 12:14 | Jambato | when trying to apply nth on a vector of vectors I get the following error : UnsupportedOperationException nth not supported on this type: core$init_gamearea clojure.lang.RT.nthFrom (RT.java:798) |
| 12:14 | Jambato | said vector is bound to a global variable |
| 12:14 | Bronsa | Jambato: can you nopaste the code you're using? |
| 12:14 | Jambato | sure |
| 12:15 | Jambato | http://pastebin.com/c5stPg4U |
| 12:16 | Bronsa | Jambato: line 19 |
| 12:16 | Bronsa | you probably want (def gamearea (init-gamearea)) |
| 12:17 | Jambato | duh of course it is a function -_- |
| 12:17 | Jambato | so stupid |
| 12:17 | Bronsa | also, assoc doesn't work the way you're using it in line 29 and 30 |
| 12:17 | Bronsa | it has no side effect |
| 12:17 | Bronsa | so you're not modifying list-of-players or gamearea |
| 12:18 | Jambato | it isn't modifying any copys? |
| 12:18 | Bronsa | you probably want list-of-players and gamearea to be atoms |
| 12:18 | Bronsa | and then swap! gamearea assoc instead of assoc gamearea |
| 12:19 | Bronsa | ,(let [x {}] (do (assoc x :a 1) x)) |
| 12:19 | clojurebot | {} |
| 12:19 | Jambato | I'll try that, thanks bronsa |
| 12:19 | Bronsa | ,(let [x (atom {})] (do (swap! x assoc :a 1) @x)) |
| 12:19 | clojurebot | {:a 1} |
| 12:25 | Jambato | Bronsa: so the maps I'm using and whta's inside must all be atoms? |
| 12:25 | Bronsa | no |
| 12:26 | Bronsa | all clojure collections are immutable Jambato |
| 12:26 | Bronsa | assoc and friends returns copies of the collection, they don't modify it |
| 12:26 | Bronsa | if you want to modify something, you generally want to put it inside an atom |
| 12:27 | Jambato | ah so I swap the modified copy |
| 12:27 | Bronsa | swap! is a function that takes an atom, a function and optiona arguments |
| 12:28 | Bronsa | applies the function to the current state of the atom and sets the atom's value to the return value of the function |
| 12:30 | Jambato | what if I have to swap several atoms? must I wrap them within a specific form? |
| 12:31 | recursor94 | Does anybody know of any good opensource projects that are relatively easy for a beginner to understand and learn from? |
| 12:32 | recursor94 | For clojure. |
| 12:37 | joegallo | Jambato: no, atoms are independent. if the swapping that you want to do is intended to be synchronized, then you're looking for a different data type, refs. |
| 12:38 | joegallo | recursor94: is there any particular domain that would be especially interesting to you? |
| 12:39 | Jambato | joegallo: there isn't any concurrency involved |
| 12:39 | Jambato | I just need to sequentially update 2 different atoms |
| 12:40 | Bronsa | Jambato: just using swap! on each atom will be sufficient |
| 12:40 | Jambato | ok |
| 12:40 | joegallo | Jambato: that's fine, of course. if you were worried about something else reading from a bad old value from atom b during the fraction of a second between the write to atom a and the write to atom b, then what you'd want is refs. |
| 12:41 | joegallo | but since there isn't any such reader that you're worried about, then atoms are just fine, i suppose. |
| 12:42 | joegallo | (like for instance if atom a represented a debit into an account, and atom b represented the credit to another account -- that'd probably be refs then) |
| 12:46 | recursor94 | joegallo: Hard to say, I suppose the most interesting thing I can think of is artificial intelligence. Second would probably be databases, and third games. Most of the open source projects I have seen on github are web frameworks. |
| 12:46 | joegallo | you need a database-driven game with an AI component! :D |
| 12:47 | recursor94 | Do such things exist XD? |
| 12:48 | joegallo | i doubt it, but it's a big world out there |
| 12:51 | joegallo | i can't speak for the quality of this (it may very well be excellent, but who knows) http://stevelosh.com/blog/2012/07/caves-of-clojure-01/ |
| 12:52 | recursor94 | Cool, thanks! |
| 12:53 | joegallo | the code for that lives in a series of tags, here: https://github.com/sjl/caves/ |
| 12:53 | joegallo | might be a neat place to start with something |
| 13:04 | Jambato | http://pastebin.com/zieSRwp9 > now I got a IllegalArgumentException Key must be integer clojure.lang.APersistentVector.invoke (APersistentVector.java:265) |
| 13:05 | Jambato | probably wasn't a good idea to use numbers as keywords |
| 13:07 | jjido | are you using assoc correctly |
| 13:07 | Jambato | oh litteral keywords don't change anything |
| 13:07 | Jambato | jjido: I have no idea I'm a beginner |
| 13:08 | jjido | what is the third argument? the key? |
| 13:08 | Jambato | there is no third argument |
| 13:09 | Jambato | only two |
| 13:09 | jjido | you used [np] |
| 13:09 | jjido | yes I can't count |
| 13:10 | jjido | anyway is [np] the key? try without brackets. |
| 13:10 | Jambato | np is the key yes |
| 13:11 | Jambato | nope no better |
| 13:11 | Jambato | without brackets |
| 13:11 | IamDrowsy | you should look at your swap! calls... swap! takes an atom and a fn of min 1 args.. calls (f @atom-stat .. rest-args) ... and swaps the result "into the atom" |
| 13:11 | jjido | what's the error? |
| 13:11 | Jambato | IllegalArgumentException Key must be integer clojure.lang.APersistentVector.invoke (APersistentVector.java:265) |
| 13:12 | IamDrowsy | so last line should be (swap! gamearea #(assoc % nga newstack) |
| 13:12 | IamDrowsy | ) |
| 13:12 | jjido | yes IamDrowsy knows his/her stuff |
| 13:13 | Jambato | ok I see |
| 13:13 | Jambato | funcitons not values |
| 13:13 | Jambato | *functions |
| 13:14 | edlothiol | or even (swap! gamearea assoc nga newstack), since you can pass additional parameters to swap! |
| 13:15 | Jambato | holy mackerel it works |
| 13:16 | Jambato | I'm so happy |
| 13:16 | Jambato | I had so many troubles with the haskell version |
| 13:16 | Jambato | thanks IamDrowsy and edlothiol |
| 13:21 | jjido | Jambato: clojure has lower entry threshold than Haskell |
| 13:22 | zilti | IMO Haskell-syntax is totally unreadable |
| 13:22 | Glenjamin | i'd say clojure is has a lower barrier to actually producing something real than haskell |
| 13:22 | Glenjamin | basic haskell is pretty simple |
| 13:24 | Jambato | jjido: my haskell version involved the State monad |
| 13:24 | Jambato | but stuf is quite unwieldy |
| 13:25 | Jambato | to use that is |
| 13:29 | konr | Is there some meta-information I could add to a defn in cljs to compile it in whitespace mode, reglardless of what project.clj says? |
| 13:31 | gfredericks | konr: that would surprise me |
| 13:32 | zilti | Friend's documentation is so incredibly bad, if I had used the time otherwise I had written my own authentication system by now. |
| 13:35 | zilti | It does not even bother calling my credential-fn |
| 13:36 | zilti | It simply responds with login_failed. |
| 13:47 | Morgawr | hello.. I've been reading some clojure code and in one code snippet there's a call to a "some" function.. since it has a very ambiguous name I can't properly find its definition on google (or whatever), can someone tell me what it is and how to find it? |
| 13:48 | morphling | ,(doc some) |
| 13:48 | clojurebot | "([pred coll]); Returns the first logical true value of (pred x) for any x in coll, else nil. One common idiom is to use a set as pred, for example this will return :fred if :fred is in the sequence, otherwise nil: (some #{:fred} coll)" |
| 13:48 | Morgawr | morphling: thanks! |
| 13:50 | xeqi | zilti: do you have a snippet you need help with? |
| 13:52 | zilti | xeqi: https://www.refheap.com/paste/13794 That's what I have by now. Registration works flawless, so does the auth/validate-user function, but it never gets called by Friend. |
| 13:55 | mebigfatguy | exit |
| 13:56 | xeqi | zilti: what do you mean registration works flawless? |
| 13:56 | xeqi | that when a user posts the the /register page the user gets added to the db? |
| 13:57 | zilti | xeqi: The stuff gets stored in my db the way it should. Yes, that's what happens |
| 13:58 | xeqi | I notice you don't have wrap-session |
| 13:58 | xeqi | is that on purpose? |
| 13:58 | zilti | no |
| 13:59 | zilti | but I kinda expected Friend to do that stuff |
| 14:01 | xeqi | since you are using compojure, you might want to use compojure.handler/site or compojure.handler/api to setup the standard middleware |
| 14:02 | xeqi | the ring middleware ecosystem assumes you've setup and requied ones before hand. In general having each middleware setup what it needs doesn't compose well |
| 14:03 | xeqi | though it could be possible for them to declare they're prerequisites and have a system solve that... hmm... |
| 14:03 | zilti | Well, anyway, that shouldn't be the reason stopping Friend from calling my validate-user function |
| 14:05 | asalaaak | hey mates |
| 14:05 | asalaaak | (- 465 200) (* 70) |
| 14:05 | asalaaak | i want to calculate 465 - 200 * 70 |
| 14:05 | asalaaak | but |
| 14:05 | asalaaak | this expression only calculates 465 - 200 |
| 14:05 | asalaaak | how can i fix this |
| 14:05 | asalaaak | please help |
| 14:05 | asalaaak | (- 465 200) (* 70) |
| 14:05 | asalaaak | this doesnt calculate * 70 |
| 14:05 | Bronsa | ,(* (- 465 200) 70) |
| 14:05 | clojurebot | 18550 |
| 14:06 | xeqi | ,(- 465 (* 200 70)) |
| 14:06 | clojurebot | -13535 |
| 14:06 | Aim_Here | ,(- 465 200)(* 70) |
| 14:06 | clojurebot | 265 |
| 14:07 | zilti | Why does that even work? |
| 14:07 | Aim_Here | ,(* 70) |
| 14:07 | clojurebot | 70 |
| 14:07 | Aim_Here | I'd have thought it would eval to 70 |
| 14:07 | zilti | ,(do(- 465 200)(* 70)) |
| 14:07 | clojurebot | 70 |
| 14:08 | zilti | It does. Clojurebot only takes the first expression I gues |
| 14:08 | zilti | *guess |
| 14:08 | asalaaak | thx matesss |
| 14:09 | zilti | xeqi: I tried to include all the middleware defined there and found out that wrap-multipart-params is broken (It wants assoc-conj which doesn't exist) |
| 14:12 | zilti | Seems like ring 1.1.8 and ring 1.2.0 are too incompatible for Friend to work. Well, I guess I just wasted a whole afternoon. |
| 15:03 | tacoman | is there a relatively simple way to use a C library from either Clojure or Clojurescript? Or am I going to be stuck doing something like JNI/JNA manually, then making Clojure bindings to that? |
| 15:05 | tacoman | I know I'm probably going to have to write wrappers eventually, but I'd prefer not to be writing two sets if I can avoid it |
| 15:06 | Aim_Here | I'm under the impression that until now, Clojurists figured that Java got them all the libraries they'd ever need, so they've never needed bindings and shims for native code before. |
| 15:07 | arkh | I haven't heard of a way to call native code outside of JNA but I don't have any first-hand experience with that |
| 15:08 | tacoman | I'm looking to use libtcod, but unfortunately it's a C lib |
| 15:09 | arkh | sweet : ) |
| 15:09 | tacoman | no Java bindings iirc |
| 15:09 | tacoman | actually... hmm, looks like someone *started* work on some since the last time I looked this up |
| 15:10 | tacoman | clj, even, but only one commit, and a month ago |
| 15:14 | bordatoue | hello could anyone tell me if there is any equivalent for python's dir in clojure, say if want to list all the functions available in clojure's list what would be the best way to do it |
| 15:16 | joegallo | bordatoue: you mean functions that operate on lists? |
| 15:17 | joegallo | lists don't really have functions... they're a datastructure |
| 15:17 | gfredericks | best bet is a combo of the clojure cheatsheet and clojure.repl/dir |
| 15:18 | bordatoue | okay |
| 15:18 | joegallo | http://clojuredocs.org/quickref/Clojure%20Core is pretty good |
| 15:18 | gfredericks | yeah if you had pressed me on a third thing it woulda been clojuredocs |
| 15:19 | gfredericks | oh also lazybot's $findfn can be nice |
| 15:19 | bordatoue | joegallo: i meant fns that operate on list |
| 15:19 | gfredericks | $findfn 3 4 7 |
| 15:19 | lazybot | [clojure.core/bit-or clojure.core/bit-xor clojure.core/+ clojure.core/unchecked-add clojure.core/+' clojure.core/unchecked-add-int] |
| 15:20 | bordatoue | gfredericks: how do it get this findfn in repl |
| 15:20 | joegallo | bordatoue: okay, that's what i figured -- that's the issue, though. if you want a list of all the methods that a String has, you can look at the documentation for String, or you can use reflection to list them. |
| 15:20 | arkh | bordatoeu: also, http://stackoverflow.com/questions/2747294/how-to-list-the-functions-of-a-namespace |
| 15:20 | gfredericks | bordatoue: you don't really; much easier to have a PM with lazybot |
| 15:20 | joegallo | but with list, it doesn't have any functions -- there are other (disembodied) functions that happen to operate on lists, but they're not tied to list directly |
| 15:20 | bordatoue | thats cool |
| 15:20 | joegallo | so you just gotta look 'em up ;) |
| 15:21 | gfredericks | well i can't say for sure that getting the lazybot code and doing it from the repl is necessarily difficult |
| 15:43 | Morgawr | hey guys.. I'm playing around with ClojureScript.. since there's not a lot of available resources, I am copying this code http://nakkaya.com/2012/01/31/clojurescript-canvas-a-simple-breakout-implementation/ for a breakout clone but the program seems to be hanging on goog.Timer creation |
| 15:43 | Morgawr | the code is exactly the same (at least, I hope) and yet with the goog.Timer declaration (At the end, last snippet of code) the code simply doesn't go past that let statement |
| 15:44 | bordatoue | gfredericks: where can i get the information on how to interact with lazybot |
| 15:44 | Morgawr | if I remove that statement the code works but nothing happens (no timer, duh) |
| 15:44 | Morgawr | anyone knows what might be wrong? |
| 15:45 | gfredericks | bordatoue: no idea; the README on github might help |
| 15:46 | bordatoue | can you show me an example on how you would interact with lazybot, I am not getting any response from it |
| 15:46 | bawr | Hello. Which clojre repl do I want? Preferably a console version. |
| 15:48 | arkh | Morgawr: what does firebug / chrome dev tools say about it? |
| 15:49 | arkh | bawr: leinengen's? |
| 15:49 | Morgawr | arkh: it says "TypeError: goog.Timer is not a constructor" |
| 15:49 | bawr | arkh: ah, right, forgot all about lein |
| 15:50 | bawr | this is what I get for taking a year break from clojure xD |
| 15:50 | arkh | bawr: : ) |
| 15:50 | arkh | bawr: you'll find leinengen has some nice improvements from a year ago |
| 15:51 | arkh | bawr: *refinements |
| 15:51 | bawr | Excellent, looks like I'm in for a treat. |
| 15:51 | arkh | Morgawr: do you have your code up somewhere? |
| 15:52 | Morgawr | arkh: http://nakkaya.com/2012/01/31/clojurescript-canvas-a-simple-breakout-implementation/ it's the same as this one, literally copypasted (I typed it by hand but I also made sure this part is exactly the same) |
| 15:52 | Morgawr | the last snippet |
| 15:52 | Morgawr | basically (let timer (goog.Timer. (/ 1000 60))) |
| 15:52 | bawr | Just as a general point of interest - if I want to keep a biggish data structure in memory (say a small tree of big lists) and I want to back it up sensibly every now and then... what do I want to read? :) |
| 15:52 | Morgawr | that's the part that causes error |
| 15:55 | bawr | mostly I don't want the backup to grind my process to a halt, so obviously persistent data structures are a win |
| 15:55 | arkh | Morgawr: it runs in the compiler in my head : ) maybe try that part at a repl |
| 15:56 | Morgawr | yeah I'm still struggling with integrating the repl with the browser code |
| 15:58 | arkh | bawr: you may want to try http://clojuredocs.org/clojure_core/clojure.core/print-dup but I thought there was another way ... it's just not coming to me right now |
| 15:59 | arkh | Morgawr: I'd try it myself but I just haven't dug into clojurescript much and I'm currently working on a datomic project - sorry! |
| 15:59 | Morgawr | arkh: it's alright, thanks anyways |
| 16:00 | Morgawr | the problem is that it says goog.Timer is not a constructor, maybe I'm missing somethin from clojure syntax (I'm still learning), what defines a constructor in Clojure? |
| 16:00 | Morgawr | the call is "(goog.Timer. 1000)", if I remove the '.' at the end the error complains about Timer not being a function (rightfully so) |
| 16:01 | arkh | Morgawr: the constructor it refers to is (in this case) javascript interop with that google closure library |
| 16:02 | Morgawr | goog.Timer(opt_interval, opt_timerObject) <-- this is how the constructor is defined in the clojure doc |
| 16:03 | Morgawr | clojurescript doc * |
| 16:04 | arkh | I was looking at that (old now) twitterbuzz app rich made after the initial announcement of clojurescript - it uses goog.Timer in the same way: https://github.com/clojure/clojurescript/blob/master/samples/twitterbuzz/src/twitterbuzz/core.cljs |
| 16:05 | Morgawr | yeah, same |
| 16:05 | arkh | Morgawr: double check for typos is all I can think of |
| 16:06 | Morgawr | arkh: oh damn! I think I found the problem.. I didn't have the correct require |
| 16:06 | Morgawr | curse me, sorry for the trouble ^^ |
| 16:06 | arkh | haha - I've done the same - it's all good |
| 16:11 | recursor` | ,(println "Hello clojure programmers!") |
| 16:11 | clojurebot | Hello clojure programmers!\n |
| 16:11 | recursor` | SWEET |
| 16:13 | Morgawr | is there a ,(quit) ? :D |
| 16:14 | recursor` | Hopefully not XD |
| 16:15 | Bronsa | it should be disabled |
| 16:15 | Bronsa | ,(System/exit) |
| 16:15 | clojurebot | #<CompilerException java.lang.NoSuchFieldException: exit, compiling:(NO_SOURCE_PATH:0:0)> |
| 16:16 | Bronsa | ,(System/exit 1) |
| 16:16 | clojurebot | #<SecurityException java.lang.SecurityException: denied> |
| 16:16 | Bronsa | yeah |
| 16:16 | recursor` | ,(def my-name "recursor94") |
| 16:16 | clojurebot | #<Exception java.lang.Exception: SANBOX DENIED> |
| 16:17 | recursor` | ,(let [my-name "recursor94"] |
| 16:17 | recursor` | (println my-name)) |
| 16:17 | clojurebot | #<RuntimeException java.lang.RuntimeException: EOF while reading> |
| 16:17 | recursor` | ,(let [my-name "recursor94"] (println my-name)) |
| 16:17 | clojurebot | recursor94\n |
| 16:19 | recursor` | ,Math/PI |
| 16:19 | clojurebot | 3.141592653589793 |
| 16:40 | tacoman | does anyone here actually use Ritz? Everything I've seen suggests the normal nrepl client is used by everyone, but I'm not sure if there's any advantages/disadvantages to switching |
| 16:46 | tacoman | actually, it's in addition to, not instead of, on closer look. silly question, that |
| 16:48 | technomancy | tacoman: if you are lucky, you will never need a stepping debugger because you never have to deal with buggy code that's excessively deep or stateful. but if you find yourself needing one, ritz seems like your best bet. |
| 16:49 | tacoman | yeah, I'm hoping so. now that I'm out of school and had a few months off, I'm looking at finally doing some actual work in Clojure in some of my downtime |
| 16:49 | tacoman | hoping it's both an enlightening and entertaining experience :) |
| 16:53 | weavejester | zilti: Just noticed your earlier message. Ring 1.2.0 is backward compatible with 1.1.8, so any code you have that can run with 1.1.8 can run with 1.2.0 |
| 16:54 | zilti | weavejester: It seems to me like it's not since compojure didn't like it at all. Anyway I wrote my own authentication now ;) |
| 16:54 | weavejester | zilti: Compojure is definitely compatible with Ring 1.2.0 |
| 16:55 | weavejester | 1.2.0 doesn't change any existing functions. It follows semantic versioning pretty strictly. |
| 17:45 | Glenjamin | is there a nice way to conditionally put things into -> ? |
| 17:47 | bbloom | Glenjamin: see also cond-> and as-> |
| 17:47 | bbloom | generally, (find-doc "->") |
| 17:48 | Glenjamin | ah, that's a good tip |
| 17:48 | Glenjamin | i've got 4 forms, and only one is conditional |
| 17:50 | bbloom | ,(-> 5 (* 2) (as-> x (if (even? x) (dec x) x)) (- 3)) |
| 17:50 | clojurebot | 6 |
| 17:52 | Glenjamin | heh, the docstring for as-> does not make that obvious |
| 17:52 | bbloom | (doc as->) |
| 17:52 | clojurebot | "([expr name & forms]); Binds name to expr, evaluates the first form in the lexical context of that binding, then binds name to that result, repeating for each successive form, returning the result of the last form." |
| 17:52 | Glenjamin | reading it again after seeing the example, i get it |
| 17:53 | bbloom | yeah, needs an example |
| 17:53 | Glenjamin | shame about clojuredocs being out of date |
| 17:53 | bbloom | agreed |
| 17:54 | Glenjamin | and the clojure.org cheatsheet - it's missing a bunch of 1.5 niceities |
| 17:55 | bbloom | dnolen: in addition to some cljs hacking, i'm interested in linear problems & optimization w/ core.logic, we should add that to the infinite list of projects to work on |
| 17:58 | mthvedt | ,(keyword "") |
| 17:58 | clojurebot | : |
| 17:58 | mthvedt | ,(: {}) |
| 17:58 | clojurebot | #<RuntimeException java.lang.RuntimeException: Invalid token: :> |
| 17:58 | mthvedt | hmm |
| 17:59 | bbloom | mthvedt: yeah, most core functions do not check their arguments b/c it would have a perf penalty |
| 17:59 | bbloom | mthvedt: ##(keyword "////////+!@#$%^&*()~`=\\123") |
| 17:59 | lazybot | ⇒ :////////+!@#$%^&*()~`=\123 |
| 18:01 | mthvedt | ,(print-dup (keyword "") *out*) |
| 18:01 | clojurebot | : |
| 18:02 | mthvedt | having keywords in memory that you can't write and read again |
| 18:02 | mthvedt | seems like a violation of some principle or other |
| 18:03 | bbloom | mthvedt: yeah, so don't do that :-P |
| 18:03 | TimMc | I don't like programs that make keywords out of arbitrary strings/ |
| 18:03 | mthvedt | playing with a json parser |
| 18:04 | mthvedt | problem happens when you have "" as a json key |
| 18:04 | TimMc | JSON libs are OK, I guess, as long as you're using JSON with a known schema... |
| 18:04 | bbloom | (inc TimMc) ; fixed schemas when keywordizing json |
| 18:04 | lazybot | ⇒ 37 |
| 18:04 | bbloom | personally, i don't think there is anything wrong with strings for keys, other than you can't do (:keyword map) |
| 18:05 | bbloom | (map "string") is pretty reasonable |
| 18:10 | Glenjamin | presumably keywords are basically interned strings with nice syntax |
| 18:11 | Glenjamin | better memory usage and faster lookup / comparison would make them preferrable to strings as map keys - no? |
| 18:13 | bbloom | Glenjamin: in general, yes. however, when parsing from strings, you'd need to do an extra lookup from string -> keyword, which is virtually the same as string key -> val. so you'd only really get a win if you are doing a lot of reads from the json structure. and even then it won't matter at all if your map is relatively small |
| 18:13 | Glenjamin | ah, i see |
| 18:14 | bbloom | Glenjamin: also, if you've got an algorithm, odds are that some JSON serialization shape is not a 1 to 1 match to your internal data structures for the algorithm, so you can convert to keywords when preparing those data structures |
| 18:15 | bbloom | the bigger issue is one of semantic sanity: json does not have keywords. |
| 18:16 | bbloom | if i give you some json w/o an agreed upon schema, you have no way of knowing whether or not keys will contain valid keyword identifiers, nor will you know if it would even make sense to view them as such... like a mapping of user names to profiles or whatever |
| 18:16 | bbloom | you might want {"bbloom": {"first_name": "Brandon", "last_name": "Bloom"}} which would be most reasonably interpreted as {"bbloom" {:first-name "Brandon" :last-name "Bloom"}}, but that would require a schema |
| 18:17 | Glenjamin | mm, any sort of data interchange needs an agreed schema |
| 18:17 | bbloom | doesn't *need* it |
| 18:17 | bbloom | but it's often nice |
| 18:18 | Glenjamin | well, you need to know what you're getting - which requires at least an informal schema |
| 18:18 | bbloom | yup |
| 18:18 | Glenjamin | whether you make that a formal schema, and whether it should actually be validated against the schema i'm not sure |
| 18:19 | bbloom | depends on many factors: do you trust the data source your loading? do you expect it to change? how can it change with or without breaking you? do you have a variety of services that need to interoperate and you want to validate them? |
| 18:20 | bbloom | just like you write tests to make sure your code is correct, you can write schemas to make sure your data is correct |
| 18:20 | bbloom | just like you write defense assertions & throw errors on bad input, you can validate a schema to keep clients honest & valid |
| 18:21 | Glenjamin | i guess it comes down to how often you expect it to fail, and then weighing up the cost of validating each payload via a schema, or just having it fail when you try and read the missing data |
| 18:21 | Glenjamin | at this moment i'm writing a test which asserts an api payload i'm sending matches an xsd schema, but I wouldn't run it at runtime in this case |
| 18:22 | bbloom | yeah, if you trust the client not to send pathological documents that will put your code into an infinite loop or something, then you're good :-) |
| 18:22 | Glenjamin | and related, java api docs are really annoying - they use a bunch of classes without saying which namespace they exist in :( |
| 18:22 | bbloom | indeed. |
| 18:27 | Glenjamin | can't seem to find an existing clojure example of xsd validation either :( |
| 18:28 | bbloom | Glenjamin: rely on the java libs |
| 18:28 | bbloom | that's what they are there for! |
| 18:28 | Glenjamin | mm, but they're awful! DocumentBuilderFactory.newInstance().newDocumentBuilder(); |
| 18:29 | bbloom | (defn doc-builder (.newDocumentBuilder (DocumentBuilderFactory/newInstance))) |
| 18:29 | bbloom | boom. wrapped. |
| 18:29 | bbloom | get back to work :-) |
| 18:29 | Glenjamin | heh, cheers - not quite got the hang of the java interop yet |
| 18:34 | bbloom | btw, i forgot [] |
| 18:34 | bbloom | heh |
| 18:55 | bttf | where can i find a list of lein templates? i am looking for one with ring/compojure bootstrapped |
| 18:56 | Glenjamin | is there a neat way to filter a sequence of maps to those which are supersets of a given map? |
| 18:59 | gfredericks | select-keys would help |
| 18:59 | gfredericks | (let [ks (keys m)] (filter #(= m (select-keys % ks)) maps)) |
| 19:00 | Glenjamin | seems reasonable, cheers |
| 19:00 | bttf | lein new compojure did_it_for_me_thanks |
| 19:01 | Glenjamin | is there a logical reason why filter takes [pred coll], seems fairly arbitrary having to use ->> over -> |
| 19:02 | bbloom | Glenjamin: it's to facilitate partial application |
| 19:02 | bbloom | (def evens (partial filter even?)) |
| 19:02 | Glenjamin | mm, i see |
| 19:04 | bbloom | as a bonus, you get less stacking close parens w/ literal functions |
| 19:04 | Glenjamin | hrm, is there a better way of writing (->> coll (filter pred) first) then? |
| 19:04 | bbloom | (filter #(f (g %)) coll) vs (filter coll #(f (g %))) |
| 19:05 | bbloom | Glenjamin: that will work fine |
| 19:05 | Glenjamin | yeah, just feels a tad messy for some reason |
| 19:05 | bbloom | if a function takes 1 argument, then there isn't really a difference between -> and ->> is there? |
| 19:05 | bbloom | it's not messy |
| 19:06 | Glenjamin | hrm, not so much messy, as repetitious - selecting the first matching item from a collection seems fairly common |
| 19:07 | Glenjamin | maybe i should be using some |
| 19:07 | bbloom | some is better for that specific case, yes |
| 19:08 | Glenjamin | right, i knew something was bugging me about the construction |
| 19:08 | Glenjamin | thanks |
| 20:07 | neilmock | clojurescript folks: anyone had success running a client-side repl outside of hosted html page, eg chrome extension. |
| 20:10 | bbloom | neilmock: currently, you need a server to run the production-quality cljs repl. it depends on java |
| 20:11 | bbloom | neilmock: there is at least one cljs port that runs fully in cljs, so in theory could work in a chrome extension. however, that fork was made a while ago, so it's probably kinda out of date & definitely does no optimizations in the absence of google closure compiler |
| 20:12 | neilmock | sorry, I meant connecting to server repl via browser repl. in the same way opening http://localhost:9000 with (repl/connect "http://localhost:9000/repl") in the generated js |
| 20:12 | neilmock | afaik there are some protocol issues when not loading html from server |
| 20:13 | bbloom | no theoretical issue with that to the best of my understanding. probably just a "simple matter of programming" |
| 20:14 | neilmock | gotcha. "Uncaught Error: URI chrome-extension://jlnmhnikmhdpmmhlajecejebdecghgpf/robots.txt is invalid for field ppu " is my current nemesis |
| 20:14 | bbloom | neilmock: turn off all closure optimizations, so you won't have strange field names like ppu & you can maybe make sense of it |
| 20:15 | bbloom | if you find a particular thing that blocks you, you can propose a patch to cljs |
| 20:15 | neilmock | best i could find is a google groups post stating "Loading the file directly in your browser will not work. The Closure transport we use does not support that anymore." |
| 20:15 | neilmock | which led me to believe dealing with a chrome extension would be problematic |
| 20:16 | neilmock | also don't have optimizations enabled at the moment |
| 20:17 | bbloom | the repl transport probably assumes http |
| 20:17 | bbloom | do chrome extensions not offer an http scheme for access resources? |
| 20:18 | neilmock | probably so. I think I understand the issue so far I'll dig into it a bit. many thanks for the feedback |
| 20:19 | bbloom | did you look at the stack trace of that error? is it coming from google closure http handling code? |
| 20:22 | neilmock | bbloom: I think it is originating from Chrome. re: http://comments.gmane.org/gmane.comp.java.clojure.user/60605 |
| 20:24 | bbloom | neilmock: ok, gotcha. dnolen already clearly understands all this stuff :-P have you looked at src/cljs/clojure/browser/net.cljs ? there is an IConnection protocol |
| 20:24 | bbloom | you can implement one that is chrome extension friendly |
| 20:24 | bbloom | yeesh that's an ungly protocol tho.... |
| 20:25 | bbloom | ugly* |
| 20:25 | neilmock | heh yeah, was taking a look... |
| 20:25 | neilmock | isn't the end of the world, was just seeing if possible |
| 20:25 | bbloom | like i said: no theoretical blockers |
| 20:25 | bbloom | (that i know of) |
| 20:48 | Morgawr | guys, I am using repl with lein and clojurescript (using web repl), is there a way to use up/down arrows to cycle through commands? |
| 20:53 | bbloom | Morgawr: use rl_wrap |
| 20:53 | bbloom | or rlwrap or whatever it is called |
| 20:53 | Morgawr | how does it work? is this a plugin? |
| 20:53 | bbloom | it's a command line tool that gives rudimentary readline support to any other command line tool |
| 20:55 | Morgawr | bbloom: this is great! Thank you very much it works like a charm |
| 20:55 | bbloom | rlwrap is magic. love it |
| 20:55 | Morgawr | yeah :D |
| 20:55 | Morgawr | anyhow, thanks and goodnight |
| 21:31 | blr | hey there, anyone happen to know if lighttable has a fuzzy file finder feature similar to ctrlp in vim? |
| 21:36 | mynomoto | blr: it has. You need to include the directory in the workplace. Then, ctrl+o and type away. |
| 21:45 | blr | mynomoto: awesome thank you! |
| 22:43 | TimMc | The Clojure Conj 2013 email says "Save the Date!" but doesn't say which date. |
| 22:44 | xeqi | Nov 14-16 |
| 22:44 | xeqi | its in the image |
| 22:44 | TimMc | Oh, OK. |
| 22:44 | TimMc | My mail client doesn't do well with images sometimes. |
| 22:44 | TimMc | and it's certainly not in the text version |
| 22:44 | xeqi | agreed, -1 for not being in the text |
| 22:54 | gfredericks | TimMc: that issue tripped me up a couple times as well |
| 23:59 | technomancy | heh; oops |
