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07:09 Skola: what's the way to generate a list of numbers within a certain range?
07:09 Skola: the preferred way*
07:15 noelw: (for/list ([i (in-range min max)]) i)
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07:30 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/cxvHBA
07:30 RacketCommitBot: [racket/master] Increase default timeout to 15m. - Eli Barzilay
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08:38 RacketCommitBot: [racket] plt pushed 6 new commits to master: http://git.io/VaWPGg
08:38 RacketCommitBot: [racket/master] add release note about `handle-evt' - Matthew Flatt
08:38 RacketCommitBot: [racket/master] fix CPP mistake - Matthew Flatt
08:38 RacketCommitBot: [racket/master] ffi: fix `_x-pointer/null' when `_x' has a supertype - Matthew Flatt
08:43 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/9RxWIA
08:43 RacketCommitBot: [racket/master] mflatt responsible for collects/mzlib - Sam Tobin-Hochstadt
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08:58 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/qyZ5XQ
08:58 RacketCommitBot: [racket/master] Set eli as responsible for files in tests. - Sam Tobin-Hochstadt
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09:09 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/TGHKuw
09:09 RacketCommitBot: [racket/master] Remove erroneous file, and add an ignore rule for it. - Eli Barzilay
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10:03 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/NOtgZg
10:03 RacketCommitBot: [racket/master] Docs: fix example in FFI intro - Asumu Takikawa
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10:14 samth: rudybot: welcome back!
10:14 rudybot: samth: youre welcome
10:14 samth: offby1: you too :)
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10:24 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/IM5l9w
10:24 RacketCommitBot: [racket/master] Remove guibuilder.  See mred-designer on planet for a maintained alterative. - Sam Tobin-Hochstadt
10:24 samth: today's the day for deleting code!
10:25 asumu: samth: Nice. I'm glad since guibuilder was the source of at least one DrRacket crash.
10:25 asumu: (though only if you built the full distribution and did something weird)
10:26 samth: asumu: and now i get to close 2 bugs :)
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11:23 samth: rudybot: eval 3
11:23 rudybot: samth: error: procedure get-sandbox-by-name: expects 2 arguments plus optional arguments with keywords #:force/new?, #:lang, and #:timeout-seconds, given 4: '#hash() "samth" 'racket '#&#f
11:24 samth: offby1: something seems off here
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11:40 tonyg: Is there some way of constructing some new type (e.g. a struct) that causes equal? to raise an exception when it's used on instances of the new type? I have a non-free datatype and I want some assurance I'm not using equal? where I shouldn't.
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11:42 tonyg: ooo I guess I could use prop:equal+hash perhaps??
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11:57 Sicp: I want to create a text area for an IRC client like the one in Xchat or others, what UI widget should I use?
12:07 Sicp: cause canvas is not the right thing to do
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13:29 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/N5fg2Q
13:29 RacketCommitBot: [racket/master] racket/draw: change font face name interpretation again - Matthew Flatt
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15:04 Sicp: can't I utilize (current-date) simply by (require racket/date)?
15:04 Sicp: nevermind, yes I can
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15:18 asumu: Sicp: text% probably.
15:19 Sicp: yea I got that a long time ago
15:19 Sicp: thanks
15:19 asumu: Alright. Make sure to look in framework if you want more features out of a text% though.
15:19 Sicp: yea
15:19 (quit) jeapostrophe: Ping timeout: 245 seconds
15:19 Sicp: something's up now
15:19 Sicp: I want to create a file based on the result of a regexp on (current-date)
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15:20 Sicp: one moment
15:21 Sicp: (define fileName (string-append day " " month " " year ".txt"))
15:21 Sicp: no good?
15:21 Sicp: given a casual usage, just anywhere
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15:26 asumu: Sicp: build-path is better than string-append
15:27 Sicp: I'm encountering this, because of not understand the scope of the regexp and what I group from it
15:28 Sicp: hold please
15:29 Sicp: http://pastebin.com/z5VD8283
15:29 Sicp: that
15:29 Sicp: it's been determined that (current-date) doesn't output as a string literal, but that error is talking about something else
15:30 Sicp: the fact that I can't just define something in there and not use it in that very scope
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15:43 asumu: Sicp: Your match clause doesn't ever output anything.
15:44 asumu: You have to return filename. "fileName"
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15:51 asumu: Sicp: BTW, you probably want to convert the date to a string or use struct* to match on a date.
15:51 Sicp: I am trying to convert, number->string is not working
15:51 Sicp: nor is (format "~a~a...)
15:53 asumu: Sicp: How about date->string?
15:54 stamourv: Sicp: The main problem is that you're using a regexp to match a struct. That can't work.
15:54 stamourv: rudybot: doc current-date
15:54 rudybot: stamourv: error: procedure get-sandbox-by-name: expects 2 arguments plus optional arguments with keywords #:force/new?, #:lang, and #:timeout-seconds, given 4: '#hash() "stamourv" 'racket '#&#f
15:54 stamourv: ... thank you?
15:55 asumu: Sicp: also see http://stackoverflow.com/questions/8182452/pattern-matching-with-kleene-star-on-structure-type-in-racket
15:55 rudybot: http://tinyurl.com/7jboqdo
15:55 Sicp: *explodes*
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15:59 Sicp: sam tobin is everywhere
16:05 Sicp: I try to build-path on fileName which is defined as empty, and I get "1st argument was empty, others were "the actual date""
16:05 Sicp: of course it's empty!
16:05 Sicp: I'm using you to FILL IT!
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16:27 guy: I have a question regarding places
16:27 (nick) guy -> Guest20409
16:28 Guest20409: I'm using places to parallelize a duplicate-finder utility program
16:28 Guest20409: each directory or sub-directory gets run in a new place
16:28 Guest20409: but when I have lots of subdirectories I get this error:
16:29 Guest20409: "dup: error duplicating file descriptor (Too many open files; errno=24)"
16:29 Guest20409: any suggestions
16:29 Guest20409: ?
16:29 Guest20409: this is my first time doing parallel programming in Racket
16:29 Guest20409: but I've done it in other languages before
16:29 samth: Guest20409: there are limits on the number of open files a process can have
16:29 Guest20409: is that an OS thing?
16:30 samth: you should probably try to limit the total number places you create
16:30 Guest20409: or a Racket VM thing?
16:30 samth: yes, this is an OS limit
16:30 Guest20409: ok
16:30 samth: so you should have worker places, and send them work as they finish
16:30 samth: that way you won't open too many files before you close the earlier ones
16:30 Guest20409: is there a way in Racket to query how many cores are available?
16:30 Guest20409: or should I just choose an arbitrary number?
16:31 Sicp: major FFFUUU, major..
16:32 samth: Guest20409: use (processor-count)
16:33 samth: rudybot: doc processor-count
16:33 rudybot: samth: error: procedure get-sandbox-by-name: expects 2 arguments plus optional arguments with keywords #:force/new?, #:lang, and #:timeout-seconds, given 4: '#hash() "samth" 'racket '#&#f
16:33 Guest20409: samth: awesome, thanks!
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16:35 tewk: wow, People are using places, I must exist.
16:37 samth: tewk: yep
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16:38 tewk: On my linux system open files ulimit is 1024, I suspect he never got close to 1024 places though.
16:38 samth: tewk: i see one bug assigned to you, so you must exist
16:38 samth: but if you fix it ...
16:39 samth: tewk: more seriously, would it be possible to change setup to extract more parallelism?
16:40 samth: ie, to take jobs on a per-file basis?
16:42 Sicp: I looked into text% but got lost while looking at Framework
16:42 Sicp: I would like to know how to attach text% to frame
16:42 Sicp: I couldn't do [parent frame]
16:43 tewk: Jobs are taken on a per-file basis. The problem is when you have 4 places and 3 places are in the middle of a compile, but are waiting on a common dependency B that the fourth place is compiling.  They all have to wait for the fourth place to finish compiling B.
16:45 tewk: Making a list of all files and randomly handing out tasks may work a little better.
16:54 Sicp: thanks for that link, asumu
16:54 Sicp: this is what came out of it in the end, http://pastebin.com/iZEYDJ64
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17:15 samth: tewk: you should probably have the other 3 give up and try something else in that case
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18:21 asumu: Sicp: for text% use an editor-canvas%.
18:21 Sicp: ah, so instead of frame%, editor-canvas%
18:21 asumu: Yes, then editor-canvas% in a frame%.
18:22 Sicp: oh
18:22 Sicp: yea
18:22 Sicp: makes sene
18:22 Sicp: +s
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18:22 asumu: The editor-canvas% controls the actual drawing and such for an editor<%>, which does the text stuff.
18:22 asumu: (or something like that)
18:32 Sicp: it should just be a text% inside an editor-canvas% which is inside a frame%
18:32 Sicp: as I don't want the text% to be edited actually, it's just for display
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18:39 Sicp: but text% doesn't have any callbacks, I should be done with (define myText (new text% [parent myEditorCanvas]))
18:39 Sicp: and that should be it..
18:39 danlndi: are the racket downloads hosted at PLT built with all optimizations?
18:40 danlndi: or... at least -O3 optimizations?
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18:46 (nick) guy -> Guest30136
18:46 Guest30136: I can't for the life of me find in the docs what the parameter is that lets you specify how many decimal places to print
18:54 ararara: Guest30136: huh. I would have thought it would be in (help format)
18:57 rapacity: real->decimal-string
18:57 rapacity: oh parameter
19:00 Guest30136: I'm still not finding it
19:01 Guest30136: I don't get what (help format) means
19:01 Guest30136: if that means the format docs, then I looked and either am blind or it's not there
19:02 (quit) dnolen: Quit: Page closed
19:02 ararara: The help form should give you help on the argument given
19:02 ararara: (help format) should open http://docs.racket-lang.org/reference/Writing.html in your browser
19:03 ararara: and it isnt there as i expected it would be
19:03 ararara is assuming Guest30136 means format parameters, like ~a
19:05 Guest30136: no sorry
19:05 Guest30136: like (parameterize <some-parameter-that-specifies-decimal-precision> (printf ...))
19:05 Guest30136: I've used it before
19:05 Guest30136: I can't remember what it's called
19:06 Guest30136: and I don't know where to look
19:06 Guest30136: I've looked in pretty-printing, printer-extensions, and some other places I thought would make sense
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19:10 Guest30136: to be clear, I'm using parameter in the Racket sense: http://docs.racket-lang.org/reference/parameters.html
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19:11 ararara: Guest30136: yeah, im reading that now. Its not something ive looked at yet
19:13 Guest30136: sorry, I just barely looked into rapacity's suggestion
19:14 Guest30136: that should work fine for me
19:14 Guest30136: I thought I remembered having to parameterize something
19:14 Guest30136: and I still think there is a parameter like that
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19:14 Guest30136: but real->decimal-string will do the trick
19:14 Guest30136: thanks
19:16 Sicp: nice
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19:54 em: I think it would be cool if you could program in the browser with racket
19:55 danlndi: anyone know where I can find the definition of string-append?
19:57 em: danlndi: --- http://docs.racket-lang.org/reference/strings.html#%28def._%28%28quote._~23~25kernel%29._string-append%29%29
19:57 rudybot: http://tinyurl.com/72wvd43
19:58 asumu: danlndi: In the C code, I think.
19:59 asumu: (at src/racket/src/string.c)
19:59 em: oh he meant the code that creates the append-string procedure. I see.
20:00 danlndi: asumu: it's declared in string.c, but I don't see the definition
20:01 danlndi: asumu: ah, it's in strops.inc
20:02 danlndi: just wondering about performance... seems as good as it could be without representing strings as some sort of heap
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22:24 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/_30rBw
22:24 RacketCommitBot: [racket/master] Ownership props. - Eli Barzilay
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22:47 wally: I wrote a sort program but it works most the time but sometimes it fails.  Any help?
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22:55 wally: This is the code.  I wrote sort it works most the time.  Looking for help to fix.  Thanks in advance for any help. http://codepad.org/Wl8K9lmC
22:58 bremner: wally: i'd start by factoring out "swap" to a seperate function, and then identify which cases it doesn't work; there are only six cases, after all.
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23:13 offby1 harrupmhs
23:18 offby1 harrumphs about poor spelling
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23:21 offby1 twiddles thumbs
23:21 offby1: rudybot: eval 3
23:21 offby1 twiddles big toes
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23:21 rudybot: offby1: your sandbox is ready
23:21 rudybot: offby1: ; Value: 3
23:22 offby1: rudybot: let that be a lesson to you
23:22 rudybot: offby1: error: with-limit: out of time
23:22 rudybot: offby1: jaik dont let ams hassle you
23:22 offby1: that's right.