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00:32 offby1: smath: pong
00:32 offby1: er, samth
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01:59 ozzloy: dingfeng, i feel awkward when sebastian stares into the camera and smiles
01:01 dingfeng: lol
01:02 dingfeng: i guess humans are biologically programmed to interact with real humans. everything else leaves a kind of impendance mismatch.
01:03 dingfeng: having read their entire book on introduction to AI, i find the quality of material in the book much better.
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04:46 dingfeng: Question: foldl in racket takes (b -> a -> a) -> a -> (Listof b). Why not (a -> b -> a)? Which feels much more intuitive, and matches the subsequent arg orders.
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09:21 asumu: dingfeng: IIRC, it's because srfi/1 does it that way.
09:23 asumu: http://srfi.schemers.org/srfi-1/srfi-1.html#FoldUnfoldMap
09:40 dingfeng: Hm... Why does srfi/1 do it that way?
09:47 asumu: dingfeng: so that (foldl cons '() lst) is reverse.
09:49 asumu: This has been brought up before on the mailing list. I think the general consensus is that using the order that other languages (e.g. Haskell or Clojure) might be better.
09:49 asumu: But that it would break too many programs.
09:49 asumu: *other languages use
09:54 dingfeng: oh. that's nice to know. then i guess it's not a bad choice to use a reordered foldl for new projects.
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10:42 Blkt: good evening everyone
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11:06 samth: offby1: rudybot was being really slow
11:08 Shviller pops in just to say thanks to samth
11:08 Shviller: That code mflatt committed not only fixed the problem, it _tripled_ the framerate of the gears demo.
11:09 samth: matthew is impressive like that
11:10 Shviller: Thanks for telling him. As you probably guessed, I never got around to posting on the mailing list.
11:10 samth: i didn't tell him -- i think that was probably eli
11:11 Shviller: Well, thanks to whomever it was, then. :D But you still get special thanks for taking the time to answer.
11:12 samth: Shviller: no problem -- that's why having a channel is nice
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13:42 offby1: samth: yes, I know; the entire ec2 instance on which rudybot runs has been slow for a couple days; no idea why
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13:59 offby1: rudybot: init
14:00 rudybot: *offby1: your sandbox is ready
14:00 offby1: samth: I had a rogue emacs process that was sucking up 100% CPU :)
14:00 offby1: rudybot: feel better now?
14:00 rudybot: *offby1: feel free to talk to fsbot in pm
14:00 offby1: :-(
14:00 offby1: what a snub
14:00 samth: rudybot: eval (+ 3 4)
14:00 rudybot: samth: error: with-limit: out of time
14:01 offby1: :-(
14:01 samth: urg
14:01 offby1: rudybot: eval (+ 3 4)
14:01 rudybot: *offby1: error: with-limit: out of time
14:01 offby1: bah
14:03 offby1: rudybot: eval (+ 3 4)
14:03 rudybot: *offby1: error: with-limit: out of time
14:04 offby1: oddly, it seems to be just "eval" that's slow
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18:37 samth: rudybot: eval (+ 3 4)
18:37 rudybot: samth: your racket/init sandbox is ready
18:37 rudybot: samth: ; Value: 7
18:37 samth: woot
18:37 samth: rudybot: eval woot
18:37 rudybot: samth: error: reference to an identifier before its definition: woot in module: 'program
18:37 samth: rudybot: eval 'woot
18:37 rudybot: samth: ; Value: woot
18:37 samth: that's better
18:38 offby1: can't explain it
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19:29 ozzloy: exit
19:33 offby1: foyer
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23:12 ozzloy: is there a way to get the arity of a function that is passed in as an argument?  so (define (call-with-all-truth-values f) call f with #t ... #t, then call f with #t ... #f, and so on?
23:12 ozzloy: right now i have (define (call-with-all-1-truth-values f) ...) up through (define (call-with-all-3-truth-values f) ...)
23:13 mithos28: rudybot: doc procedure-arity
23:13 rudybot: mithos28: your sandbox is ready
23:13 rudybot: mithos28: http://docs.racket-lang.org/reference/procedures.html#(def._((lib._racket%2Fprivate%2Fbase..rkt)._procedure-arity))
23:13 mithos28: ozzloy: look at that
23:13 ozzloy: cool, thanks
23:14 mithos28: it is a little more than just the number of arguments because some functions can take optional arguments, and some can take as many as they want
23:14 ozzloy: right right
23:14 ozzloy: i would expect that to come up for the search "arity"
23:16 ozzloy: http://docs.racket-lang.org/search/index.html?q=arity&q=arity but it does not
23:16 mithos28: it is on the second page
23:16 ozzloy: oh cool, currying!
23:17 ozzloy: oh wow, i didn't even notice that
23:18 ozzloy: mithos28, that's what i get for not reading
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