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07:22 mye: ports are described as streams in chapter 8 of the guide. But they are not a (stream? x). Just unfortunate wording but possibly confusing since it might make sense for an input port to be a stream?
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11:33 carleastlund: I just published a Racket blog entry called "I Write Funny-Lookin' Racket Code", if anyone is curious to read it.  It explains why I use the heretical curly braces in ma' code ;)
11:37 noelw: BURN THE HERETIC!
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11:58 ianjneu: Imagine an indentation style that just moved trailing whitespace to be starting whitespace.
11:58 ianjneu: samth's code would show up on another screen.
11:58 samth: hey
11:58 ianjneu: :P
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13:22 samth: darn, never here when mithos28 is around
13:27 carleastlund: samth, and without your glasses on, you'd look just like him...  I'm getting suspicious!
13:27 samth: carleastlund: that was before i cut my hair
13:27 carleastlund: So... now you've lost your super strength?
13:28 nilyaK: no, it's spikey and blonde now, power level is super high.
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13:32 stamourv: samth with spikey blond hair. That's scary.
13:32 samth: truly
13:32 samth: i may have to go home to collect myself
13:32 stamourv: Please don't, we have a meeting with Matthias this afternoon.
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16:10 RacketCommitBot: [racket] plt pushed 2 new commits to master: http://git.io/cjLmSA
16:10 RacketCommitBot: [racket/master] adjust define-primitive so that it cooperates with struct-info. - Robby Findler
16:10 RacketCommitBot: [racket/master] make color and pen from 2htdp/image be structs in the sense - Robby Findler
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16:55 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/r4-hQQ
16:55 RacketCommitBot: [racket/master] add a note about the red boxes - Robby Findler
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20:56 Shambles_: What would happen if I was to ask a dumb question about programming language design, which has nothing to do with Racket, but I can excuse because of the whole "PLT" part, and it being vaguely related to the FrTime unmaintained part of Racket? :P
20:58 bremner: unless it involves Mark Tarver, about the worst you can expect is a blank stare
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21:32 Shambles_: Alright, well, here goes.  I'm trying to understand how dataflow programming 'works' at a operational level.  I've figured most of it out.  I know updates usually occur breadth first, and within that topologically sorted.  I've figured out that you have to occasionally eliminate duplicate evaluations.
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21:35 Shambles_: What I haven't figured out is exactly how you /should/ handle graph-cycles/recursion.  To avoid "glitches" (technical term for when the 'arguments' (input streams) to a 'function' (output stream) aren't up to date) you need to make sure that a stream isn't evaluated before its inputs.  But this gets complicated in the face of forks in the flow.  One fork could recurse early, another could later.
21:35 Shambles_: *Both* paths could be taken.
21:35 Shambles_: So... anybody know how this is done 'correctly'?  The academic articles I've found talk lots of theory but seem afraid to talk about the operational part.
21:37 Shambles_: Originally I was going to treat self-recursion specially and stick it on the 'end' of a FIFO queue after topologically sorting the breadth-first selected nodes to update.  That handles self recursion sanely, reliably, as far as I can tell.  Then I got all scared of non-self recursion...  I don't know how that should be done.
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23:04 Shambles_: I suppose putting folks to sleep is better than getting heckled. ;)
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