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00:46 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/R2ZSng
00:46 RacketCommitBot: [racket/master] add a note about "" in with-compound-rewriter - Robby Findler
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03:17 neilv: when someone is teaching a class using racket, and they have to talk about keywords, do they say "pound colon" aloud?
03:19 Haffe: What keyword are you thinking about?
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03:45 arbn: I dislike calling '#' "pound", because it isn't £
03:46 neilv: but it's one syllable
03:46 arbn: As opposed to "octothorpe"? You can say "hash", I guess.
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03:48 neilv: racket already has "hash" and "#hash"
03:54 neilv: so, i'm trying to use web-server for the ui for a "media pc" setup
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05:13 Cryovat: neilv: mplayer?
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07:13 neilv: Cryovat: for video playing, vlc
07:37 Cryovat: Does it have a HTTP server to control it?
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07:48 neilv: the racket web server will be the front-end, and it will talk a simple tcp protocol to vlc
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08:22 Cryovat: Sounds fun to debug
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10:07 asumu: Hmm, I say "hash colon"
10:10 noelw: space cakes
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12:06 trink: I'm interested in trying out Slideshow, and the docs say to run the 'slideshow' executable, but I don't know where this is..
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12:13 asumu: trink: it should be in the 'bin' folder where you installed Racket.
12:13 asumu: Note that you don't actually need to use the 'slideshow' executable though.
12:14 asumu: You can, for example, just run a slideshow presentation from DrRacket.
12:14 asumu: (just don't do this if you don't trust the code)
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12:17 trink: Okay, thanks. I just want to run the tutorial at this point
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12:33 Cryovat: asumu: What happens if the code errors?
12:33 Cryovat: Does it eat DrRacket?
12:40 carleastlund: Cryovat: No, DrRacket recovers gracefully from errors.  But it doesn't sandbox a program's permissions.  Use the 'slideshow' executable if you download someone else's program and want to make sure it doesn't overwrite files or something like that.
12:41 Cryovat: Ah, that makes sense
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13:51 stamourv: Cryovat: Re single-float integers:
13:52 stamourv: rudybot: (integer? 1.0f0)
13:52 rudybot: stamourv: your sandbox is ready
13:52 rudybot: stamourv: ; Value: #t
13:52 stamourv: rudybot: (exact-integer? 1.0f0)
13:52 rudybot: stamourv: ; Value: #f
13:52 stamourv: This was not a good idea, IMO.
13:52 Cryovat: So it's an integer stored in a single, basically?
13:53 stamourv: Yes.
13:53 stamourv: But that makes `integer?' much less useful.
13:53 Cryovat: That's an... interesting move
13:54 stamourv: I believe it's part of our Scheme "legacy".
13:55 Cryovat: It's in the specification?
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13:56 stamourv: Probably not. Numbers have historically been underspecified in the Scheme standards.
13:56 stamourv: IIRC R6 fixed this, though.
13:57 Cryovat: Ah
13:57 Cryovat: I find that a bit surprising
13:57 Cryovat: I haven't read all the standards
13:57 ianjneu: I have a large syntax object that I want to see the entire contents of. I know there is a parameter that I have to set to #f, but I can't remember the name or the right search query for the docs
13:57 Cryovat: But had the impression that the numerical tower was one of the big "things" for Scheme
13:58 stamourv: Cryovat: In Scheme practice, yes, but I don't think it was standardized.
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13:59 Cryovat: Ok, thanks :)
14:00 ianjneu: print-syntax-width
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16:29 jakk: is there a way to do lazy eval with swindle?
16:29 asumu: BTW, the videos for the first 3 lectures of SK's online PL course is out: http://www.cs.brown.edu/courses/cs173/2012/Videos/
16:30 asumu: jakk: you can probably (require racket/promise)
16:30 asumu: rudybot: init swindle
16:30 rudybot: asumu: your swindle sandbox is ready
16:30 asumu: rudybot: eval (require racket/promise) (force (lazy 5))
16:30 rudybot: asumu: ; Value: 5
16:31 asumu: rudybot: (lazy 5)
16:31 rudybot: asumu: ; Value: #<promise:#<undefined>:1:0>
16:31 asumu: tada.
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16:43 Cryovat: asumu: Is that eli?
16:44 jakk: what is the difference between #lang lazy and (require racket/promise)?
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16:49 Cryovat: Jidging by the Youtube username I'll assume no
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16:54 stamourv: Cryovat: For the PL course videos? That's Shriram.
16:54 stamourv: jakk: #lang lazy is a language where laziness is the default.
16:55 stamourv: `racket/promise' allows you to explicitly add laziness in an otherwise strict language.
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17:03 jakk: can you have default laziness with swindle? or just explicit?
17:03 Cryovat: Ah, I see :)
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17:04 stamourv: jakk: Only explicit.
17:05 jakk: is there anyway to do oop with #lang lazy? :(
17:05 stamourv: You could probably write a version of Swindle that would be lazy, and that would reuse most of the existing Swindle implementation, but that's not especially easy.
17:05 stamourv: Does `racket/class' work?
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17:06 stamourv: (I don't know if it's compatible with #lang lazy.)
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17:06 jakk: ill have to try later, i'm not home right now
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17:07 stamourv: If you don't need multiple dispatch, you should probably use `racket/class' instead of Swindle. It's better integrated with the rest of Racket.
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17:26 asumu: You can use `racket/class` in #lang lazy. But class related operations will be strict.
17:26 asumu: Since #lang lazy will treat imported functions as strict.
17:26 asumu: Lists and so on should still be lazy as appropriate.
17:30 Cryovat: Not to nag (too much)
17:30 Cryovat: But what's the status with TR and classes?
17:33 asumu: Cryovat: check back in a few months. There is work on-going.
17:33 Cryovat: Ah, good to know :)
17:34 Cryovat: I'm sure it must be a huge undertaking
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