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01:58 mithos28: is there a way to do non greedy matching in syntax parse?
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02:02 jonrafkind: you mean like (x ... z:number) and you want the x's to stop matching before it hits a number?
02:02 jonrafkind: you have to do like x:not-a-number ... z:number
02:02 mithos28: yeah, I found ~not which seems to allow me to do what I want
02:02 jonrafkind: oh
02:02 mithos28: it makes the :not-a-number part easy
02:04 jonrafkind: can you show how you used it
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02:05 jonrafkind: im guessing.. (~and (~not number) x) ... z:number
02:05 mithos28: yeah
02:05 jonrafkind: ok, i do that with match sometimes
02:05 mithos28: (~and parse-option (~not (pattern . args)))
02:06 mithos28: Using syntax-parse to make my own define-syntax-class like thing
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02:43 strashilol: hi all
02:43 mithos28: hello strashilol
02:44 strashilol: i have a small problem with racket, maybe you could help me out
02:44 strashilol: i've googled
02:44 strashilol: already :)
02:44 mithos28: Cannot help you till you explain it
02:44 strashilol: sure
02:44 strashilol: the thing is, i compile the current whalesong (1-18)
02:44 strashilol: first, it compiles only under racket 5.2.1
02:45 strashilol: all the other versions -> i get compilation errors
02:45 strashilol: second, after compiling under both ubuntu and win7 i get the same result
02:45 strashilol: whalesong says it "doesn't know how to compile" the language
02:46 strashilol: the language in question may be racket, racket\base, racket\gui etc
02:46 strashilol: am i doing smth wrong?
02:46 mithos28: No. So whalesong is very particular to racket versions because it works at the bytecode level, which is why it only works for 5.2.1.
02:47 mithos28: Also it cannot compile those languages, it can only compile very minimal languages
02:47 strashilol: understood, thanks a lot
02:47 mithos28: #lang planet dyoo/whalesong
02:47 strashilol: but i thought racket\base is quite minimal?..
02:47 strashilol: ooook
02:47 mithos28: that is the lang line you want
02:48 mithos28: racket/base is very minimal, but not enough
02:48 strashilol: thank you a great deal, mithos28!
02:48 mithos28: no problem
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08:27 shiftingcontrol: well, this is first time I am using racket, did some basic stuffs, http://docs.racket-lang.org/guide/syntax-overview.html#(part._.Conditionals_with_if__and__or__and_cond), couldn't get the difference between let and let*  any better examples ?
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10:05 neilv: anyone used the db collection for performance-sensitive stuff?
10:06 neilv: i might be seeing strange behavior with load-testing
10:08 noelw: What kinda strange behaviour?
10:08 noelw: In Ryan's old DB driver it could deadlock
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10:11 neilv: you know how there's those conveniences like "query-list", which assume would be faster than doing it yourself, because they could do at least a little optimization and avoid a copy or something?
10:12 noelw: yeah...?
10:12 neilv: i've been converting this old database library to use those, one-by-one, and doing load-testing runs after each one.  and each time, the numbers get larger rather than smaller
10:15 neilv: i guess i didn't restart postgresql, but with this duration of load, any leftover caches or whatnot in postgresql should be in the noise, i'd think
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10:15 neilv: noelw: deadlock when it was spgsql, or still once it became db/postgresql?
10:16 noelw: spgsql
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10:17 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/uMEBNA
10:17 RacketCommitBot: [racket/master] win32 racket/gui: fix decoding of system font name - Matthew Flatt
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10:25 neilv: i don't see anything suspicious for query-list in the source code
10:26 neilv: nor for query-rows, since not using the grouping features
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10:28 neilv: nor for the ones the get 1 or 0,1 rows or values
10:31 neilv: noelw: any more info on the spgsql deadlock? i'm not finding it on web
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10:33 noelw: If you encountered it, you would know -- the driver would just be wedged
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10:34 noelw: As in, no further queries would be processed
10:35 noelw: I think we told Ryan about it, and I imagine he fixed the error in the new DB drivers
10:35 neilv: errors, or blocking?
10:36 neilv: ok, thanks for the info. will test it extra hard
10:36 noelw: Blocks
10:37 neilv: whew. definitely not hit that yet
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11:21 neilv: the statistical profiler is a godsend
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11:22 neilv: i have it hooked up so that it can be turned on at runtime in this web app. it then puts a profiling report for a request and html page generation... to the bottom of the html page
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11:31 noelw: What have you found?
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11:33 neilv: my manual implementation of query-list was inexplicably faster than query-list. so i decided that load testing was not the place to be measuring micro-optimizations. switching to profiling-directed optimization is a relief
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11:33 neilv: normally, load-testing gives a better holistic picture
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11:48 neilv: ok, this request handler spends 45% to 60% of its time in db parse-server-message when there's no db contention
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11:53 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/Zfe_Vw
11:53 RacketCommitBot: [racket/master] racket/draw: fix `set-clipping-rect' in `record-dc%' - Matthew Flatt
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11:53 neilv: i think that's mostly waiting on the database. it's pretty efficient
11:54 neilv: the only thing that looks a little suspicious is the cond of regexp tests
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12:36 water_sheep: hello
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12:49 water_sheep: I am trying out racket gui drawing and I am trying to draw outside paint-callback function but it doesn't work. I also want to try animating later. http://pastebin.com/PUmYR8Lr
12:50 water_sheep: I just modified example in racket drawing guide slightly, but it doesn't work.
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12:51 water_sheep: I would appreciate if someone could take a look
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13:18 jonrafkind: is there a way to print stuff so that \n turns into a real new line but strings are printed with surrounding " on them?
13:18 jonrafkind: I already tried using display/write/print..
13:19 jonrafkind: im trying to print some java code so it needs to be syntactically correct
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13:23 neilv: the racket printer has a lot of parameters.  if you need to write java code reliably, you might just want to write it manually rather than use the racket printer
13:24 neilv: so, write-string or write-bytes
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13:27 jonrafkind: ok maybe the only solution is to write it to a file and then cat it back out
13:27 jonrafkind: if I just use write then I see a bunch of \n's
13:27 neilv: you mean in drracket?
13:28 neilv: write is part of the racket printer i was talking about
13:28 jonrafkind: just the command line
13:28 neilv: i think write-string will work for you
13:28 jonrafkind: ok
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13:55 water_sheep: anyone has an idea why my thing doesn't work?
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13:59 water_sheep: it doesn't report any error, but it doesn't show text I want it to show. I probably screwed refreshing or drawing order or something but I don't get what
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14:06 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/3Jlw5A
14:06 RacketCommitBot: [racket/master] Move `Ephemeronof` documentation. - Sam Tobin-Hochstadt
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15:04 asumu: water_sheep: the issue here is that your drawing is being erased by a window event.
15:04 asumu: You need to delay the drawing or do it in the callback.
15:04 asumu: Since a resize will erase it, for example.
15:04 water_sheep: okay
15:04 asumu: (if you do your red drawing at the REPL after the window is shown, you'll get the red text)
15:04 water_sheep: I noticed
15:05 asumu: There's some discussion of this at the top of documentation for canvas%.
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15:19 water_sheep: about doing it in the callback: If I want to change drawing from outside callback, how do I do that? Can callback function detect outside input at all? I am not sure how scoping works here
15:20 water_sheep: callback function has thow RGUMENTS, CANVAS AND DC.
15:21 water_sheep: *since callback function has two arguments, canvas and dc
15:21 water_sheep: I really need to check spelling more
15:21 water_sheep: I am something of scheme noob
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15:23 water_sheep: thanks for answer, by the way
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15:39 water_sheep: nevermind, I figured out. Outside variables are visible
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15:58 asumu: water_sheep: yeah, scoping in classes works like anything else in the language.
15:58 asumu: They are just expressions.
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15:59 asumu: Also, DrRacket can show you the scope explicitly if you turn on "online check syntax" or press the check syntax button.
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16:00 water_sheep: and what are advantages and disadvanatages of drawing outside callback?
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16:07 water_sheep: check syntax thingy is cool, by the way
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17:43 neilv: i see "(planet dherman/memoize)". currently no memoize built-in?
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17:45 jonrafkind: I believe so
17:46 jonrafkind: I mean what you said is correct, afaik
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17:56 neilv: dherman/memoize is missing 2 features i need. i think i'll do a one-off for now, and then later make a planet package
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18:10 samth: neilv: it's up on github
18:10 samth: so you should just fork it
18:10 samth: https://github.com/dherman/memoize.rkt
18:12 neilv: thanks, but the 2 features mean i can't reuse hardly any of it
18:12 neilv: bbl
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19:25 miles23: Q:  I installed latest racket from source (Ubuntu Karmic) to /usr/local/racket - install seemed to go ok but when I do racket -v it returns no output (nothing) - Is this perhaps the wrong version to use for Ubuntu 12.04 ?
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19:37 samth: milezteg: what if you just do 'racket'
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19:48 milezteg: solved by using racket-5.2.1-bin-x86_64-linux-f14.sh
19:48 milezteg: instead of the Ubuntu build
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20:26 RacketCommitBot: [racket] plt pushed 3 new commits to master: http://git.io/vGSAdQ
20:26 RacketCommitBot: [racket/master] add the ability to specify #:parent to struct/dc (and fix struct/c to use it) - Robby Findler
20:26 RacketCommitBot: [racket/master] add a check that struct/c can find all of the selectors in the current scope - Robby Findler
20:26 RacketCommitBot: [racket/master] adjust struct/dc so error say "struct/dc" not "-struct/dc" - Robby Findler
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22:27 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/Oo7CSw
22:27 RacketCommitBot: [racket/master] fix the computation of the minimum width for the blue boxes - Robby Findler
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22:42 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/d90vLA
22:42 RacketCommitBot: [racket/master] rename contract-gui.rkt to blueboxes-gui.rkt - Robby Findler
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