00:00 jonrafkind: well ok i misspoke, i think you can use the frtime primitives directly, the behaviors and such
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00:00 jonrafkind: but normally you just do #lang frtime
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00:15 paddymahoney: sorry all for flooding with join/leave, I think freenode wanted registration, this has been completed. Will monitor to confirm that I don't disconnect frequently. Thanks @jonrafkind
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01:05 AStranger: Does anyone here have any experience with opengl and racket? I'm using Linux and none of the demo programs work. I do have gtkglext-1.2.0 installed, so I don't know what else to try.
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01:31 jonrafkind: AStranger, what error do you get
01:38 AStranger: One moment, pulling it up
01:39 AStranger: "There was an error initializing OpenGL. Maybe OpenGL is not supported on the current platform." When I try to run gears
01:39 haffe: AStranger: Have you tried running the interpreter from console? You might get some more infomation that way.
01:41 AStranger: I haven't tried that, I haven't actually used the console so I'm not quite sure how.
01:43 haffe: Start a terminal, write drracket &
01:43 haffe: press enter.
01:43 haffe: Sorry.
01:43 haffe: no ampersnad.
01:43 haffe: Just drracket
01:44 AStranger: Ohh, I thought you meant just 'racket'
01:46 AStranger: System is a little slow, I'm getting there
01:47 AStranger: It's worth mentioning the opengl works in 5.0.1, just nothing newer
01:49 haffe: Really odd.
01:49 AStranger: Yeah, unfortunately I started a recompile of 5.2.1, so the installed version isn't running
01:50 AStranger: I've googled the messages, let me check me history
01:53 AStranger: The message 5.2.1 gives me when trying to run checkers is "with-gl-context in canvas%: no gl context available"
01:54 AStranger: Then another message "Checkers requires OpenGL, but there was an error initializing the OpenGL context. Maybe OpenGL is not supported by the current display."
01:54 haffe: This is the error from within drracket?
01:55 AStranger: The first one is, the second is a popup probably from the games launcher
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02:04 jonrafkind: what does glxinfo say
02:05 AStranger: A lot, but it does say "direct rendering: Yes"
02:05 AStranger: Glxgears is about 1200 fps with the current load
02:06 jonrafkind: well thats about the limit of my knowledge, i have no idea whats wrong
02:06 AStranger: It has to be something racket changed after 5.01
02:06 AStranger: OpenGL still works in that version, but no later version that I've tried
02:07 jonrafkind: are you on ubuntu?
02:07 AStranger: Nope, Slackware
02:07 Kaylin: god I haven't used that in forever, how is it?
02:07 jonrafkind: could be a missing package I guess
02:08 AStranger: Just like it's always been, you have to do everything yourself, but after that it just works
02:08 Kaylin: glad to hear it :)
02:08 AStranger: Google said the missing package was gtkglext, but I've already tried installing it, no change
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03:41 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/aYoB-w
03:41 RacketCommitBot: [racket/master] New Racket version 5.3.0.2. - Eli Barzilay
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05:16 gf3: eli: BTW, I get the same error when compiling Racket from source as when using the pacman version
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08:37 Johan___: I have a problem: I want to use mouse events but they accumulate. How do I flush the buffer?
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12:18 mye: any ideas how to implement this: http://paste.lisp.org/display/129069 or does something  like random-eval exist?
12:23 samth: mye: see http://planet.racket-lang.org/package-source/cce/fasttest.plt/4/2/planet-docs/manual/Random_Distributions.html#%28part._.Choices%29
12:23 rudybot: http://tinyurl.com/6wsa5ub
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13:11 sid___: is there a was to generate new windows(frames) on the fly.. For eg. whenever there is a click on the list box a new frame must open.
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13:19 offby1: I assume so.
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13:19 offby1: (new frame% [whatever]) ...
13:19 offby1: haven't actually tried it but it seems reasonable
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13:25 sid___: <offby1> thanks... i ll try ..
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13:33 sid___: <offby1> I am facing a problem in doing that.. the thing is .... I can create frames as you mentioned on the fly.. but each frame has a textbox... and i need to identify the textbox uniquely for differnet frames to get/set them... any idea how i can do that??
13:34 offby1: sid___: look at https://gist.github.com/2425125
13:34 offby1: sorry, that probably doesn't answer your most recent question.
13:36 offby1: well, maybe look at my gist anyway; you'll notice that I keep all the frames in a global variable.
13:37 offby1: I suspect you'll want to do something similar.  That way you can modify the text -- or indeed, anything at all about the frame -- after you've created them.
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13:45 sid___: <offby1> Thanks a lot..
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14:20 sid___: <offby1> so do i need to have the text-fields as global too? a bunch of them.. because as i see it . i need the name of the text box to do a get/set on them... how can i get away with placing them on frames?
14:23 offby1: not sure what you're trying to do, actually.
14:23 offby1: my hunch is that you don't need anything global other than the top-level frames, since each frame contains the text of interest.
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14:28 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/SJe6CA
14:28 RacketCommitBot: [racket/master] fix doc picto - Matthew Flatt
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14:28 sid___: <offby1> okay.. i can create the frames as you said... and i have textboxes in the frames... and finally i show the frames as desired..
14:29 sid___: then again later... i need to get the text in the textfields (get) and set them... how can i accomplish this only if i know the frames and not the fields?
14:31 asumu: sid___: why not add a method to the frame% so that it keeps track of its textbox?
14:31 asumu: And lets you access it appropriately through the frame%'s methods?
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15:27 offby1: I'd be surprised if you couldn't ask the frame for a list of its children, and extract the textbox that way
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15:36 jonrafkind: hash-set!: expects type <mutable table> as 1st argument, given: '#hash();
15:36 jonrafkind: lolwat
15:37 stamourv: That doesn't look like a mutable table to me.
15:37 jonrafkind: oh make-hash
15:37 stamourv: rudybot: (mutable-hash? '#hash())
15:37 rudybot: stamourv: your typed/racket sandbox is ready
15:37 rudybot: stamourv: error: #<undefined>:1:1: Type Checker: untyped top-level identifier mutable-hash? in: mutable-hash?
15:37 jonrafkind: the error should say 'exepects type <mutable hash>' or something
15:38 stamourv: That may be the same error message as `dict-set!'.
15:38 stamourv: rudybot: init racket
15:38 rudybot: stamourv: your sandbox is ready
15:38 stamourv: rufybot: (require racket/dict)
15:38 stamourv: rudybot: (require racket/dict)
15:38 rudybot: stamourv: Done.
15:38 stamourv: (dict-set! 'a 3 '((a . 1) (b . 2)))
15:39 stamourv: rudybot: (dict-set! 'a 3 '((a . 1) (b . 2)))
15:39 rudybot: stamourv: error: car: expects argument of type <pair>; given: #f
15:39 stamourv: rudybot: (dict-set! '((a . 1) (b . 2)) 'a 3)
15:39 rudybot: stamourv: error: car: expects argument of type <pair>; given: #f
15:39 jonrafkind: ; dict-set!: contract violation, expected: (and/c dict? dict-mutable?), given
15:39 jonrafkind: ;   1, which isn't dict?
15:39 stamourv: I give up, back to work.
15:39 stamourv: jonrafkind: ?
15:40 jonrafkind: -> (dict-set! 1 2 3)
15:40 jonrafkind: ; dict-set!: contract violation, expected: (and/c dict? dict-mutable?), given
15:40 jonrafkind: ;   1, which isn't dict?
15:40 stamourv: Oh, I see.
15:40 stamourv: Ok, then I don't know why the error says table.
15:40 stamourv: Wanna fix it?
15:40 jonrafkind: im grepping the collects right now
15:41 stamourv: That may be in the C code.
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16:56 dyoo: can I say that Eli is awesome?
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16:56 RacketCommitBot: [racket] plt pushed 5 new commits to master: http://git.io/Iz3XnA
16:56 RacketCommitBot: [racket/master] [honu] check for definitions before continuing to parse. completely parse the left hand side of an operator - Jon Rafkind
16:56 RacketCommitBot: [racket/master] [honu] dont confuse identifiers with $. use = in with-syntax - Jon Rafkind
16:56 RacketCommitBot: [racket/master] [honu] replace $ with honu-$ just to be safe - Jon Rafkind
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17:11 Fare: OK.
17:11 Fare: Is there a word for functions that are not pure, but not impure, depending on how you look at them.
17:12 Fare: Pure-ish?
17:12 Fare: purish?
17:12 Fare: slightly soiled?
17:12 Fare: e.g. delay / force -- internally impure, externally pure.
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17:13 Fare: non-deterministic functions -- kind of pure if you can only examine one choice in a given continuation/universe
17:14 Fare: functions that do logging / memory allocation / cpu time consumption -- side-effects that "don't matter"
17:14 dyoo: Fare: not sure of terminology.  Observationally pure?
17:15 Fare: functions that are only ever called but once with the same argument, so you can side-effect the argument and nobody will ever see the difference
17:16 Fare: pure-looking ?
17:16 dyoo: unfortunately, I don't know.
17:17 Fare: thanks for the interaction
17:18 Fare: I had a library of "interfaces". One collection of interfaces is called "pure". Another is called "stateful". I wanted a name for that third one.
17:19 dyoo: If I hear a term that makes sense, I'll let you know.  :)
17:19 Fare: superficially pure
17:19 Fare: supureficial
17:19 dyoo: *groan*
17:19 dyoo: :)
17:19 jonrafkind: all higher order "pure" functions are inherintly non-pure, unless you use a type system
17:20 Fare: well, they don't introduce the impurity, so these functions themselves are pure, though the result of calling them on impure arguments might not be.
17:20 jonrafkind: right
17:21 jonrafkind: and there is no way to force arguments to be pure or not
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17:25 Fare: In other contexts, any function that consumes CPU time is impure.
17:26 chandler: Maybe the best thing is to refer to functions as being "pure with respect to <X>" rather than making a blanket assertion of purity?
17:32 Fare: chandler, sure. Nevertheless, there is clearly a default <X> in most lisps.
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17:35 asumu: Fare: why is that not just pure? Even Haskell does impure computations under its "pure" monads.
17:36 asumu: Similarly, languages with type & effect systems give you effect masking, where things are pure when their effects are unobservable.
17:36 Fare: asumu: because it cheats inside, and/or depends on your squinting your eyes.
17:37 asumu: So what doesn't cheat inside? Is a function that allocates conses pure?
17:37 Fare: for instance, one of my supureficial interfaces is a box interface that ensures that a box can only be unboxed once.
17:37 asumu: 5~
17:37 asumu: whoops
17:37 Fare: it's great for converting between pure and stateful interfaces.
17:38 Fare: get a stateful interface, make sure you box any state into use-once boxes, and tada, there you can re-export it as a pure interface and use a lot of algorithms that expect a pure interface.
17:39 asumu: That sounds like affine contracts http://planet.racket-lang.org/display.ss?package=affine-contracts.plt&owner=tov
17:39 rudybot: http://tinyurl.com/822ssd9
17:39 Fare: conversely, by putting pure datastructure into a "current state" box, you can reexport your pure interfaces as stateful interfaces.
17:40 Fare: exactly - just done in CL
17:42 Fare: why is it called affine and not linear?
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17:45 asumu: Linear is must use once. Affine is at most once.
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17:47 ynniv: is there a way to have a local override of a collect lib?
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17:48 ynniv: I would like to improve a collect, but I don't want to modify the system files
17:49 Fare: isn't multiplication by 0 linear?
17:49 asumu: ynniv: if you want to improve a collect, patch it in the core and send a pull request on github. :)
17:50 ynniv: so development is done by forking plt?
17:50 asumu: ynniv: Yes.
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17:51 asumu: Which collect are you looking to improve?
17:51 ynniv: websocket and postgres
17:51 ynniv: websocket is broken for modern browsers
17:51 ynniv: and postgres doesn't support hstore
17:51 ynniv: simple things
17:52 ynniv: almost at the bug fix level, but I feel that pull requests are more welcome than bug reports ;)
17:52 ynniv: plus I'm impatient
17:52 asumu: Sounds great, and indeed they are. :)
17:53 ynniv: I'm using the MacOSX dmg distribution right now… I guess I'll need to compile from source?
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17:55 asumu: Yeah, I think so. I don't use Mac so not sure though.
17:57 ynniv: i don't suppose you use geiser? I'm having some minor issues with that as well
18:02 jhemann: Errors in the racket documentation should be reported how?
18:08 offby1: jhemann: mailing list
18:09 offby1: jhemann: or if you're daring, fork the racket repository on github ... make the fix to your local repository ... then issue a pull request
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18:09 asumu: jhemann: bug report is fine too
18:09 asumu: (you can report through DrRacket or web page)
18:09 offby1: oh yeah
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19:08 asumu: Hmm, I think I found a bug in the module system.
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19:21 jonrafkind: ok eli i finished GEB
19:22 offby1: Gödel, Escher, Bach?
19:23 jonrafkind: ya
19:24 offby1 read that when it came out, God help him
19:24 offby1: Used to have the first edition ... dunno where it is any more :-(
19:25 jonrafkind: didn't it come out in the 70s?
19:26 offby1: I'd have guessed 1980, but sure
19:27 jonrafkind: i dont think i knew how to read until 1990
19:28 offby1: *sigh*
19:28 jonrafkind: rofl
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19:30 asumu: jonrafkind: what did you think of it?
19:30 jonrafkind: it had some nice ideas, my eyes glazed over some of the math
19:30 asumu has read it, but a long time ago
19:30 asumu: I see.
19:30 jonrafkind: i like the stuff about AI and intelligence
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19:31 jonrafkind: i know just enough about music to follow the stuff about bach
19:32 offby1: This is classic:
19:32 offby1: ``In April 2009, when asked about his Wikipedia article, he commented, "[It] is filled with inaccuracies, and it kind of depresses me." When asked why he didn't correct it, he replied, "The next day someone will fix it back."[28] In Aug. 2011 Hofstadter said he is happy with the article and the only inaccurate part of his Wikipedia entry was the previous sentence because the inaccuracies were subsequently fixed.[citation needed]''
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19:50 jhemann: that's awesome.
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19:55 offby1: Seems too good to be true
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20:05 jhemann: edit-menu:undo- and edit-menu:redo- are greyed out by default when I use the standard-menus-mixin. What's required to make these menu-items usable?
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20:06 jhemann: The only example of their use I can find seems to have the same issue I'm seeing.
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