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00:49 neilv: this is not really about racket, but since the channel is dead-silent... for the rackout living room media appliance thing... when it is being used to play music, any opinions on whether it can just blank the display, or will most people want some visualization thing?
00:50 jonrafkind: visualization should be an option
00:50 jonrafkind: make it run xscreensaver
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00:51 jg_: help
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00:51 neilv: i'm wondering what to invest in first. both take considerable effort to do right in an appliance-y resilient way
00:51 jonrafkind: blanking vs visualization?
00:52 neilv: yes
00:52 jonrafkind: whats so hard about it
00:52 neilv: the details
00:54 neilv: examples: what kind of blanking (black screen, some kind of dpms level, acpi, etc.), will it work out of the box on all devices (say, some tvs will cut out speakers), can we be sure to turn it back on always, are we going to be powering on and off a huge tv and quickly kill it every time the song changes, etc.
00:55 jonrafkind: black screen
00:56 neilv: that would probably be the default out-of-box, yes
00:56 neilv: but eventually we'd want to power down the display as an option
01:03 neilv: i think i'll adapt the fullscreen text-on-black-background "greeter" window go blank while music is playing, and then restore the greeting when music stopped
01:07 neilv: this is what the greeter window looks like (running under kvm, so it's not getting reverse dns and displaying an fqdn): http://imgur.com/F75qL
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03:18 ewemoa: i'm having trouble with the sha1 function in racket 5.3's file/sha1: http://pastie.org/private/lylydpfyuoxxxolpmq4wa
03:22 jonrafkind: works for me
03:23 ewemoa: jonrafkind: thanks for checking
03:23 ewemoa: i guess i will try under another os
03:23 jonrafkind: although the file i tested on has a sha1 starting with 'c'
03:23 jonrafkind: also racket's sha1 is absurdly slow
03:24 jonrafkind: sha1sum on the command line took an order of magnitude less time
03:24 ewemoa: i only seem to have problems with sha1 results that are supposed to have leading zeros
03:24 ewemoa: it does seem slow yes
03:24 jonrafkind: do you have a small file that has leading 0's in its sha1
03:25 ewemoa: i will look for one
03:25 jonrafkind: ok i found one
03:25 jonrafkind: just a sec
03:25 jonrafkind: ok you are right, it prints 39 instead of 40 now, bcause the sum has a leading 0
03:26 ewemoa: thanks for the verification
03:28 jonrafkind: well if you use sha1-bytes you will get the full string
03:28 jonrafkind: i guess converting each byte chops off leading 0's
03:29 ewemoa: aha
03:30 jonrafkind: hm, but from my little tests it seems bytes->hex-string works..
03:30 jonrafkind: if you manually execute (bytes->hex-string (sha1-bytes in)) then it works
03:30 ewemoa: thanks!
03:31 jonrafkind: (define (sha1 in)
03:31 jonrafkind: (format "~x" (sha1-input in)))
03:31 jonrafkind: because sha1 uses ~x to print which somehow takes off leading 0's
03:31 jonrafkind: im not exactly sure how ~x works but it definitely does not use bytes->hex-string to work
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03:32 jonrafkind: can you file a bug report for this
03:32 ewemoa: how does one do that?
03:32 jonrafkind: bugs.racket-lang.org
03:32 ewemoa: thanks i'll look into it
03:32 ewemoa: thanks for your help
03:33 jonrafkind: if you can attach a file that has leading 0's in its sha1 that would be good too (a small file)
03:33 ewemoa: i will look for a small one
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03:35 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/lLm_tg
03:35 RacketCommitBot: racket/master cdf7cad Eli Barzilay: New Racket version 5.3.1.3.
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09:31 didi`: rudybot: (find-seconds 0 0 0 19 10 2008)
09:31 rudybot: didi`: your sandbox is ready
09:31 rudybot: didi`: error: reference to an identifier before its definition: find-seconds in module: 'program
09:31 didi`: rudybot: (require racket/date)
09:31 rudybot: didi`: Done.
09:31 didi`: rudybot: (find-seconds 0 0 0 19 10 2008)
09:31 rudybot: didi`: error: car: expects argument of type <pair>; given: #f
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13:56 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/KyDX3A
13:56 RacketCommitBot: racket/master 5861bf0 Sam Tobin-Hochstadt: Make Typed Racket name printing more deterministic.
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14:09 RacketCommitBot: [racket] plt pushed 2 new commits to master: http://git.io/La6hIQ
14:09 RacketCommitBot: racket/master cfb256f Matthew Flatt: cocoa: update PSMTabBarControl for x86_64...
14:09 RacketCommitBot: racket/master 55b358f Matthew Flatt: list PSMTabBarControl among included software
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14:52 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/UO-hoQ
14:52 RacketCommitBot: racket/master 995af02 James Swaine: Make future trace docs point to the right place when discussing gc-info
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17:31 shalalalalalaaal: hi
17:31 shalalalalalaaal: is there a way to have a servlet monitor file changes to a template and reload the template?
17:31 shalalalalalaaal: so I don't have to re-compile or re-interpret the rkt file to get the updated template?
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17:41 jonrafkind: you might be able to do the same hack that I tried recently for gui programs. detect when the file changes, then copy it to a new module in /tmp, then dynamic-require the new module into the servlet
17:42 jonrafkind: if you can update the servlet paths to use that new module then it might work
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17:43 shalalalalalaaal: jonrafkind: can you elaborate?
17:44 jonrafkind: well if you have a file used by a servlet called a.rkt and it changes because you are editing it, then have a thread which monitors the file for changes (maybe with md5sum) and if it changes then do (copy-file "a.rkt" "/tmp/x1.rkt") where x1 is some generated name. then do (dynamic-require "/tmp/x1.rkt" 'servlet-thing) in the server
17:45 shalalalalalaaal: ah, I see
17:45 jonrafkind: but you will have to name it a new module each time the file changes otherwise racket wont load it
17:46 shalalalalalaaal: k
17:47 shalalalalalaaal: i wonder, but doubt, if there is support for inotify in racket
17:47 shalalalalalaaal: for linux
17:48 jonrafkind: it shouldnt be too hard to write an ffi binding for it
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18:20 FrostyX: hi
18:20 mithos28: FrostyX: Hello
18:22 FrostyX: I wanna ask about somethink. With roomamtes we discussed about it, but we didnt find any solution ... why some of us cant run code where is redefinition of variable ? ... (define a 5) and second line (define a 6) give us some error ... module: duplicate definition for identifier in: a
18:23 FrostyX: do you know where is problem ?
18:24 mithos28: How are you running that? You will have different answers depending on interactive window vs. definition window. And depending on the language you are using
18:26 FrostyX: Personaly i write code in drracket in the window on top and run it by run button in toolbar. I have "determine language from source" and in code window it generated me #lang racket
18:26 mithos28: Ok so you should be getting an error of 'duplicate definition
18:27 FrostyX: why that ?
18:27 mithos28: Because you are defining 'a' twice in a module
18:27 mithos28: And that is disallowed
18:28 mithos28: define in a module, is different from define at the top-level
18:30 FrostyX: but it works for some my roommates and in learning script (i dont know if it is right word) it is written its possible to do ... so what I should do to get it work for me
18:30 FrostyX: ?
18:30 FrostyX: please
18:31 mithos28: If you really want that you could use #lang racket/load, but I don't think you want the top level behavior
18:32 mithos28: Why do you want to be able to write two defines, instead of just changing the first one
18:34 FrostyX: It is normal to modify variable or not ? ... for example when i want increment variable ...  (define a (+ a 1))
18:34 mithos28: You want set! for that
18:35 mithos28: (set! a (+ a 1))
18:35 mithos28: define at the toplevel acts like set! on the second or later case
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18:36 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/5Qxj9A
18:36 RacketCommitBot: racket/master 47a33f2 Danny Yoo: Added another example for for/fold/derived: for/max....
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18:37 FrostyX: oh okey. So it is written  wrong in my script ... maybe set is in next chapters ... I was confused cause there are working examples with two defines to one symbol ... and it work for some of my schoolmates (how it is possible then?) ..
18:37 FrostyX: and thx for solution :-)
18:37 mithos28: What #lang are they using
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18:39 FrostyX: I can ask ...
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18:40 FrostyX: Okey, I have asked on our facebook group .. have to wait for answer ..
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19:05 FrostyX: mithos28: no answers. they are sleeping I guess. I'll tell you tomorrow okey ? :)
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