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00:07 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/y5wf0w
00:07 RacketCommitBot: [racket/master] Fixed x/y mixup in 'axes' - Neil Toronto
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08:29 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/YHcjVw
08:29 RacketCommitBot: [racket/master] Synch German string constants with latest. - Mike Sperber
08:45 Gertm: what's the best way to do interthread communication?
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10:34 RacketCommitBot: [racket] plt pushed 4 new commits to master: http://git.io/IorlIQ
10:34 RacketCommitBot: [racket/master] reader doc fixes - Matthew Flatt
10:34 RacketCommitBot: [racket/master] add cross-ref from reference to guide on places - Matthew Flatt
10:34 RacketCommitBot: [racket/master] fix docs on reading characters - Matthew Flatt
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12:19 samth: Gertm: channels and sync
12:19 samth: rudybot: doc channel-put
12:19 rudybot: samth: your racket/init sandbox is ready
12:19 rudybot: samth: http://docs.racket-lang.org/reference/channel.html#(def._((lib._racket%2Fprivate%2Fmisc..rkt)._channel-put))
12:19 samth: rudybot: doc sync
12:19 rudybot: samth: http://docs.racket-lang.org/reference/sync.html#(def._((quote._~23~25kernel)._sync))
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13:15 Gertm: samth: thanks
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15:00 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/_3Jv8g
15:00 RacketCommitBot: [racket/master] fix the error check - Robby Findler
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16:23 rapacity: is there a concise way of expressing "for (x = 1; x < n; x = x * 2) { body ... }" in racket?
16:24 mithos28: rudybot: eval (for* ((i 3) (x (in-value (* i 2)))) (displayln x))
16:24 rudybot: mithos28: your sandbox is ready
16:24 rudybot: mithos28: ; stdout: "0\n2\n4\n"
16:25 mithos28: rudybot: eval (for*/list ((i (in-range 1 3)) (x (in-value (* i 2)))) x)
16:25 rudybot: mithos28: ; Value: (2 4)
16:25 rapacity: the condition is x < n
16:26 mithos28: oh, I misread it
16:27 mithos28: how about a generator which generates 1,2,4,8,… and a when clause
16:28 mithos28: (define gen (generator (lambda () (let loop ((x 1)) (yield x) (loop (* 2 x))))))
16:28 mithos28: rudybot: eval (define gen (generator (lambda () (let loop ((x 1)) (yield x) (loop (* 2 x))))))
16:28 rudybot: mithos28: error: reference to an identifier before its definition: generator in module: 'program
16:28 rapacity: naa, it's fine, I was hoping for a built-in concise way :p
16:29 rapacity: I already coded a simple for-loop macro that mimics C's for loop
16:30 cipher: rapacity: how about for/fold?
16:30 rapacity: how would that work?
16:31 mithos28: rudybot: eval (for*/list ((i 3) (x (in-value (expt 2 i)))) x)
16:31 rudybot: mithos28: ; Value: (1 2 4)
16:32 mithos28: rudybot: eval (for*/list ((i in-naturals) (x (in-value (* i 2))) #:when (< x 100)) x)
16:32 rudybot: mithos28: error: for: expected a sequence for i, got something else: #<procedure:in-naturals>
16:33 mithos28: rudybot: eval (for*/list ((i (in-naturals)) (x (in-value (* i 2))) #:when (< x 100)) x)
16:33 rapacity: it won't terminate
16:33 rudybot: mithos28: error: with-limit: out of time
16:33 rapacity: since you have (in-naturals) at the top and that will keep outputting the next natural :p
16:34 mithos28: even with the when?
16:34 rapacity: when just acts like a filter
16:34 mithos28: right
16:35 mithos28: rudybot: eval (for*/list ((i (in-range (sqrt 101))) (x (in-value (* i 2)))) x)
16:35 rudybot: mithos28: ; Value: (0 2 4 6 8 10 12 14 16 18 20)
16:36 mithos28: rudybot: eval (for*/list ((i (in-range (/ (log 101) (log 2))) (x (in-value (expt 2 i)))) x)
16:36 rudybot: mithos28: error: eval:1:0: read: expected a `)' to close `('
16:36 mithos28: rudybot: eval (for*/list ((i (in-range (/ (log 101) (log 2)))) (x (in-value (expt 2 i)))) x)
16:36 rudybot: mithos28: ; Value: (1 2 4 8 16 32 64)
16:37 mithos28: but that is different because the loop index is different
16:39 offby1: rudybot: (sort (for*/list ([a (in-range 1 7)][b (in-range 1 7)]) (cons (+ a b) (format "~a, ~a" a b))) < #:key car)
16:39 rudybot: *offby1: what if A and B contains the same x with different y?
16:39 offby1: rudybot: eval (sort (for*/list ([a (in-range 1 7)][b (in-range 1 7)]) (cons (+ a b) (format "~a, ~a" a b))) < #:key car)
16:39 rudybot: *offby1: your sandbox is ready
16:39 rudybot: *offby1: ; Value: ((2 . "1, 1") (3 . "1, 2") (3 . "2, 1") (4 . "1, 3") (4 . "2, 2") (4 . "3, 1") (5 . "1, 4") (5 . "2, 3") (5 . "3, 2") (5 . "4, 1") (6 . "1, 5") (6 . "2, 4") (6 . "3, 3") (6 . "4, 2") (6 . "5, 1") (7 . "1, 6") (7 . "2, 5") (7 . "3, 4") (7 . "4, 3") (7 . "5, 2") (7 . "6, 1") (8 . "2, 6") (8 . "3, 5") (8 . "4, 4") (8 . "5, 3") (8 . "6, 2") (9 . "3, 6") (9 . "4, 5") (9 . "5, 4") (9 . "6, 3") (10 . "4, 6") (1
16:39 offby1: rudybot: moar, plz
16:39 rudybot: *offby1: I find it a litle disturbing that fsbot responds to "moar"
16:40 offby1: rudybot: oh, and you don't?
16:40 rudybot: *offby1: and then it produces something like a lambda: (lambda (<hole>) (+ 3 <hole>)), which is your current continuation, and it hands that lambda to the thing you call/cc'd (so in this case, 'k' is '(lambda (<hole>) (+ 3 <hole>))'
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16:41 mithos28: does rudybot just read the channel for its sayings or do you have to tell it in particular to remember something?
16:44 offby1: it's a mixture.  The more interesting quips come from reading the channel :)
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18:15 offby1: is there a built-in that does more or less (lambda (seq) (ormap values seq))?
18:15 offby1: it'd probably be named "some", I guess
18:15 mithos28: so taking the first true value from a sequence?
18:16 mithos28: rudybot: eval (for/first ((v (list #f 2))) v)
18:16 rudybot: mithos28: ; Value: #f
18:17 offby1: yeah, that'd probably work too
18:17 mithos28: rudybot: eval (for/first ((v (list #f 2))) #:when v v)
18:17 rudybot: mithos28: error: eval:1:29: #%datum: keyword used as an expression in: #:when
18:17 mithos28: rudybot: eval (for/first ((v (list #f 2)) #:when v) v)
18:17 rudybot: mithos28: ; Value: 2
18:17 offby1: (not (empty?(filter values ...)))
18:17 offby1: etc etc
18:18 mithos28: that only works on lists
18:18 offby1: that's OK
18:20 mithos28: oh and you want something shorter than (lambda (seq) (ormap values seq))? I thought you wanted that on sequences by the seq argument.
18:21 mithos28: i don't know of anything like that
18:22 mithos28: on a side note, there is now identity in addition to values, which is restricted to one value
18:24 rapacity: (curry ormap values) is shorter
18:25 samth: (ormap values _) if you install https://github.com/samth/fancy-app
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19:26 rapacity: I have a function, when I benchmarked it in the same module, it timed at ~1.4s when I imported it into another module and timed it, it timed at ~2s
19:27 rapacity: is this normal?, is there a way to avoid this slowdown?
19:27 jonrafkind: maybe it was inlined in the first module
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19:43 arto: hello...
19:43 arto: anybody there?
19:43 mithos28: yep
19:43 mithos28: If you have a question just ask
19:44 arto: thanks, i've got a problem with drRacket. maybe you can help me.
19:44 mithos28: just ask
19:44 mithos28: no need to ask if you can ask
19:45 rapacity: thanks
19:46 arto: i just installed Gnome 3, and now every time i open Dr.racket the buttons "run", "macros", etc. are missing
19:47 mithos28: what version of DrRacket are you running?
19:47 arto: i mean, they're there, but they are invisible
19:47 arto: let me check
19:47 mithos28: it should say in the interactions window
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19:49 arto: damn i just can't find it, since all buttons are missing in the interactions window
19:49 mithos28: try control-t
19:50 mithos28: that is the key binding by default
19:50 mithos28: to run the module and bring up the interactions window
19:50 arto: it does nothing :(
19:51 arto: at least in the readme file it says it's version 5.1.3
19:51 mithos28: ok that is the latest
19:51 mithos28: but there is a release coming soon
19:52 mithos28: I have no idea why you are getting this, it doesn't sound like any bugs people have brought up on the mailing list
19:53 mithos28: I would submit a bug report, Normally you can do this through DrRacket but in your case you can go to bugs.racket-lang.org
19:53 mithos28: http://bugs.racket-lang.org
19:53 mithos28: And describe your system as well, since that will be important in your case
19:54 arto: ok, i'll do that
19:54 arto: just one more question
19:56 arto: is it better to install Racket in "unix standard" mode, or just in a folder?
19:57 mithos28: I run OS X, but I believe on linux the installations I have used have just been a folder
19:57 mithos28: what linux are you running?
19:57 arto: what distribution? Ubuntu
19:58 mithos28: sorry yes. There is a ppa for racket.
19:58 mithos28: https://launchpad.net/~plt/+archive/racket
19:59 mithos28: I assume from your second question you were using the shell installer, if you are worried about miss installing it, the ppa should automate that.
20:00 arto: ok, i'll check it out
20:00 ozzloy: is there a gnu info version of "how to design programs"?
20:00 arto: thank you very much
20:00 jonrafkind: wait.. someone actualy uses gnu info?
20:00 ozzloy: heh
20:01 ozzloy: i've started using emacs, so i've started trying other stuff too, like info
20:01 jonrafkind: emacs is a gateway drug
20:01 ozzloy: that's almost exactly what i was typing out
20:01 mithos28: why not use the embedded browser in emacs to look at the html version
20:01 (quit) arto: Quit: Page closed
20:01 jonrafkind: if you ever start experimenting with solaris seek out professional help
20:01 ozzloy: actually it was lisp that led me to emacs
20:01 ozzloy: so lisp was the gateway
20:02 ozzloy: every tutorial assumed the reader was using emacs
20:03 ozzloy: so ... i'll take that as a "no".  which leads me to my next question: is www.htdp.org the latest version of this?  it references drscheme, so i thought maybe there's a more recent version
20:04 mithos28: there is htdp2e but that is not finished
20:04 mithos28: http://www.ccs.neu.edu/home/matthias/HtDP2e/
20:04 ozzloy: ic
20:05 mithos28: I think the website is supposed to match the printed book, so that is why it hasn't changed
20:07 ozzloy: can i just s/drscheme/drracket/ in my head as i read or are there more significant changes?
20:08 mithos28: That should be all that is required
20:08 ozzloy: good enough assurance for me to invest some time
20:09 ozzloy: i'll let you know if i find something
20:09 mithos28: People are always willing to help if you have questions, and they are usually around
20:10 ozzloy: rad
20:10 ozzloy: jonrafkind, are you actually jon rafkind?
20:10 jonrafkind: yea
20:10 jonrafkind: am i famous?
20:10 ozzloy: neat.  i have heard of you on the internets
20:11 jonrafkind: oh yea, in what context
20:11 jonrafkind: i didnt start that church fire!
20:11 ozzloy: heh
20:11 ozzloy: um... programming something context.  i don't remember exactly
20:11 ozzloy: i do remmember the name jon rafkind
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20:58 civil: I got a question regarding 2htdp images
20:58 civil: anyone here?
21:00 (quit) civil: Client Quit
21:51 mithos28: Any one around that uses OS X?
21:55 zerokarmaleft: mithos28: yea
21:56 zerokarmaleft: i'm on 10.7.2
21:56 mithos28: https://github.com/shekari/racket-webkit
21:56 mithos28: I just made of proof of concept putting webkit in racket
21:56 mithos28: and wanted to see if it worked for people other than me
21:57 zerokarmaleft: sure, i can check it out after eating my delicious meatball sub
21:57 mithos28: thanks
22:11 zerokarmaleft: mithos28: everything works as advertised
22:11 mithos28: awesome thanks
22:12 mithos28: I want to make something that will complement check-syntax by auto looking up the documentation
22:12 rapacity: have you seen https://bitbucket.org/chust/racket-webkit/wiki/Home  ?
22:13 mithos28: rapacity: No I hadn't
22:13 mithos28: thanks
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