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01:24 ozzloy: where's the source for the racket guide? i think there should be an extra space in the last line of the definition of enumerate http://docs.racket-lang.org/guide/begin.html#(part._when+unless)
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02:49 RacketCommitBot: [racket] plt pushed 4 new commits to master: http://bit.ly/oUDLJ5
02:49 RacketCommitBot: [racket/master] Make the "other editors" page be called that, also the source; also comment unused author line. - Eli Barzilay
02:49 RacketCommitBot: [racket/master] Avoid running files that will try to download tex sources. - Eli Barzilay
02:49 RacketCommitBot: [racket/master] Typo in env var setting. - Eli Barzilay
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03:50 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://bit.ly/pMSnYR
03:50 RacketCommitBot: [racket/master] New Racket version 5.1.3.1. - Eli Barzilay
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05:06 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://bit.ly/ojSZ9U
05:06 RacketCommitBot: [racket/master] typo - Eli Barzilay
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07:50 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://bit.ly/n4kn02
07:50 RacketCommitBot: [racket/master] Lots of documentation formatting. - Eli Barzilay
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09:12 RacketCommitBot: [racket] plt pushed 2 new commits to master: http://bit.ly/qXOYAw
09:12 RacketCommitBot: [racket/master] remove debugging output - Matthew Flatt
09:12 RacketCommitBot: [racket/master] repair `dynamic-require-for-syntax' - Matthew Flatt
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09:24 gf3: hello gents
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09:42 gf3: I was just playing around with identifier macros in other schemes, I was wondering if you guys see anything wrong with the second macro here: http://cloud.gf3.ca/9JDq/o
09:42 gf3: the racket version works as expected
09:43 gf3: (just trying to emulate Racket's `empty`)
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11:01 samth: gf3: why not just (define empt (list))
11:02 gf3: samth: eli suggested that too, I forgot that lists are immutable
11:02 samth: ozzloy: https://github.com/plt/racket/tree/master/collects/scribblings/guide
11:02 gf3: samth: still wondering why my second macro doesn't work though :(
11:02 samth: gf3: that works even if lists are mutable
11:02 gf3: samth: in that case, wouldn't they all refer to the same list?
11:02 samth: unless you have a very different model of lists (like JavaScript's arrays, for example)
11:03 samth: no, mutable lists in Scheme refer to the ability to change the two components in a pair
11:03 samth: the empty list is immutable in every version of Scheme
11:04 ohwow_: Why banning the usage of set-car! and set-cdr! when you can just use 'set!'?
11:05 gf3: samth: oh neat, awesome, thank you
11:06 ohwow_: uh, apparently you can't make infinite lists with just set!
11:06 samth: ohwow_: there's a big difference between changing a variable (what `set!
11:06 samth: ' does)
11:06 samth: and changing a data structure (what `set-car!' does)
11:06 ohwow_: yeah i think i got it
11:07 ohwow_: set! can just create a new structure and change the pointer
11:07 samth: ohwow_: see http://htdp.org/2003-09-26/Book/curriculum-Z-H-42.html#node_part_VII for an introduction to the difference
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11:22 samth: eli: did you see leppie's question about the x64 windows packaging in #scheme?
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11:58 RacketCommitBot: [racket] plt pushed 2 new commits to master: http://bit.ly/qfUd0s
11:58 RacketCommitBot: [racket/master] fix over-eager bytecode transformation - Matthew Flatt
11:58 RacketCommitBot: [racket/master] fix lncs and jfp class file download - Matthew Flatt
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12:06 RacketCommitBot: [racket/master] Fix crash when committer has new issue but no files of their own - Jay McCarthy
12:06 RacketCommitBot: [racket/master] De-unitizing cookies and making the serializable - Jay McCarthy
12:06 RacketCommitBot: [racket/master] Converting away from racket to racket/base - Jay McCarthy
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12:13 tauntaun: Is it possible to enforce one-way communication on an async channel?
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12:20 samth: tauntaun: what do you mean by "enforce"?  what should happen to the party that's supposed to recieve but instead tries to send?
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12:43 tauntaun: samth: I guess some kind of runtime type error.  I have two threads that need to communicate asynchronously (but not via their mailboxes), and I'm thinking that they should not try to send and receive simultaneously on the same async-channel (just thinking about that gives me a headache), so I'm using two async-channels (from thread A to thread B, and from B to A), but I'm left feeling that it would be nice if the channels were more
12:43 tauntaun: port-like.  I'm rather new to all this, btw, so apologies in advance if the idea is strange.
12:44 tauntaun: But now that I think about it, would it be courting doom to use one async-channel in that way?
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13:08 tauntaun: (Yes.)
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13:10 samth: tauntaun: it's not immediately obvious how to set that up
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13:11 RacketCommitBot: [racket] plt pushed 8 new commits to master: http://bit.ly/q5yqo3
13:11 RacketCommitBot: [racket/master] Remove trailing whitespace. - Vincent St-Amour
13:11 RacketCommitBot: [racket/master] Fix visibility of arity-raised bindings. - Vincent St-Amour
13:11 RacketCommitBot: [racket/master] Have arity raising play nice with Check Syntax. - Vincent St-Amour
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13:11 samth: you could obv. create a new API that gave you two pairs of functions, which did only send and only recv respectively
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13:15 tauntaun: Right.  I'll just do something like that if I see that the code needs to be more disciplined.
13:15 tauntaun: (samth: ^)
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13:46 RacketCommitBot: [racket] plt pushed 2 new commits to master: http://bit.ly/o4tTxn
13:46 RacketCommitBot: [racket/master] Improves error messages for Redex definition forms - Casey Klein
13:46 RacketCommitBot: [racket/master] Drops `traces' call to make the file DrDr-friendly - Casey Klein
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16:59 tonyg: eli: I'm using the FFI. Is there I way I can get it to tell me sizeof _int?
16:59 tonyg: ok found it ha
16:59 tonyg: ctype-sizeof
16:59 tonyg: sorry :)
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18:30 cturner: What's an effective way to set up a repl listening on a port, so I can control it externally?
18:30 cturner: Is geister the way to go?
18:33 jonrafkind: geiser? i thought that was an emacs mode
18:33 samth: rudybot: doc read-eval-print-loop
18:33 rudybot: samth: your sandbox is ready
18:33 rudybot: samth: http://docs.racket-lang.org/reference/eval.html#(def._((lib._racket%2Fprivate%2Fmisc..rkt)._read-eval-print-loop))
18:34 samth: cturner: probably use that function w/ appropriate input and output ports
18:35 cturner: samth: thanks
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18:51 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://bit.ly/oVUxGo
18:51 RacketCommitBot: [racket/master] Fixes check syntax bug - Casey Klein
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21:41 RacketCommitBot: [racket] plt pushed 5 new commits to master: http://bit.ly/ok0r9S
21:41 RacketCommitBot: [racket/master] re-enable type for port->bytes-lines - Sam Tobin-Hochstadt
21:41 RacketCommitBot: [racket/master] Fix type of file->bytes-lines - Sam Tobin-Hochstadt
21:41 RacketCommitBot: [racket/master] Better error message when id is unbound in `make-env'. - Sam Tobin-Hochstadt
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22:44 eli: tonyg: There's also `compiler-sizeof' which uses the C thing directly.
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