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06:09 eli: Lajla: No, but I try to reply to racket and scheme related questions.
06:11 Lajla: eli, you do an excellent job here, just the iming.
06:12 Lajla: timing
06:12 eli: My timing sucks because I'm on a semi-vacation thing, so I'm not connected often.
06:15 Lajla: I insantly forgive you.
06:15 eli: In any case, the SO thing is targetting a different kind of crowd -- IRC has a pretty high threshold on several aspects, which makes it very different.
06:15 eli whews
06:16 Lajla: eli, why?
06:18 eli: That was a virtual whew, in reality I didn't even blink.
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06:18 Lajla: I will like to know why though
06:18 eli: (That's because I'm part machine, so I gave up blinking.)
06:18 Lajla: Ahh, they had the technology to make you better too?
06:18 eli: Not really.
06:19 eli: I have this terrible pain in all the diodes down my left side now.
07:54 Lajla: But you do have crosshair vision, don't you, eli?
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10:58 samth: tewk, can't you just do (_ptr i (_ptr i ...)) ?
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16:43 shkk: Can anyone please give me some kind of reference to understand Continuations? I have no idea how it works and wish to learn it
16:43 jonrafkind: arent there some docs on it in the racket manual
16:44 shkk: Is it this: http://docs.racket-lang.org/reference/cont.html ?
16:44 clklein: shkk: You could give Part VII of PLAI a try (http://www.cs.brown.edu/~sk/Publications/Books/ProgLangs/2007-04-26/)
16:45 jonrafkind: well that section does start with "continuations", so yes im pretty sure its about continuations
16:46 shkk: thanks clklein and jonrafkind
16:55 shkk: On the link: http://docs.racket-lang.org/reference/eval-model.html#(part._cont-model) . I guess there is a error. The statement In this case, the continuation for reducing (+ 1 1) is C[(+ 4 [])], not just C should have been In this case, the continuation for reducing (+ 1 1) is C[(- 4 [])], not just C. Am I correct ?
16:56 shkk: On the link: http://docs.racket-lang.org/reference/eval-model.html#(part._cont-model) . I guess there is a error. The statement " In this case, the continuation for reducing (+ 1 1) is C[(+ 4 [])], not just C " should have been " In this case, the continuation for reducing (+ 1 1) is C[(- 4 [])], not just C ". Am I correct ?
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17:13 paul_stansifer: It looks erroneous to me.
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18:06 jonrafkind: anyone know where to find this: Eugene E. Kohlbecker. "Syntactic Extensions in the Programming Language Lisp". PhD. Thesis. Indiana University. 1986.
18:06 jonrafkind: acm has a link to some publishers website where I can buy it..
18:07 chandler: I had a copy around somewhere, but it's probably on an old backup disk by now.
18:08 chandler: Hm. Actually, I'm not sure I ever had a digital copy.
18:09 chandler: I think I borrowed a paper copy at some point.
18:09 chandler: My suggestion would be to email Dan Friedman.
18:10 jonrafkind: ok
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18:25 jonrafkind: http://www.braintreepaymentsolutions.com/devblog/a-dsl-in-5-languages ; discuss!
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19:10 chandler: jonrafkind: Those "fluent" interfaces are obnoxious. It's like a bastardized Forth.
19:11 jonrafkind: i dont know much about forth, i thought cobol was supposed to be readable
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19:52 Somelauw: Does Racket have a function like trace in prolog?
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19:53 jonrafkind: you want it to show you the arguments and result of a function?
19:59 shkk: Can I create a list of functions using lambda? I mean, I need to come up with a code that generates a list of same function for a specific length
20:00 Somelauw: I want it to show any function which gets called.
20:00 Somelauw: So if it is recursive it should show the function multiple times including arguments and return value.
20:03 jonrafkind: look at racket/trace
20:04 jonrafkind: (require racket/trace) (define (x a) a) (trace x)
20:04 chandler: Is that documented?
20:06 chandler: I guess it's this? http://docs.racket-lang.org/mzlib/mzlib_trace.html?q=trace
20:07 Somelauw: I am still using plt-scheme, so I guess this is a very new function or it was renamed.
20:09 chandler: Try (require mzlib/trace) instead.
20:09 Somelauw: It works if I (require mzlib/trace)
20:09 jonrafkind: oh i guess the docs werent updated.. samth did it
20:09 jonrafkind: but i think racket/trace just exports mzlib/trace
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20:39 shkk: Hi All, is it possible to simulate foldr of ML in Scheme ?
20:42 shkk: Anybody there in this channel ?
20:51 evhan: unless ML's foldr is significantly different than "typical" implementations, then yes, it's a built-in
20:51 evhan: if not, I'm curious to know what's different
20:53 shkk: No, I said I want to write a "myfoldr" function that works exactly like the ML foldr in Scheme. Here is what I wrote, but obviously I am wrong since I am passing the cdr of the list : http://codepaste.net/ritvah
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21:07 shkk: Got it!
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23:03 chandler: Yay, 5.0.1.
23:07 offby1: rudybot: eval (banner)
23:07 rudybot: offby1: ; Value: "Welcome to Racket v5.0.1.\n"
23:07 chandler: Whoa. rudybot is more up to date than my computer is (for the next minute or two, while the installer runs).
23:08 neilv: my next production release is going to be based on 4.2.5
23:08 chandler: rudybot: init datalog
23:08 rudybot: chandler: error: module: no #%module-begin binding in the module's language in: (module program datalog)
23:09 chandler: D'oh.
23:09 chandler: rudybot: init datalog/sexp
23:09 rudybot: chandler: error: default-load-handler: cannot open input file: "/usr/local/src/racket/collects/datalog/sexp.rkt" (No such file or directory; errno=2)
23:09 offby1: huh
23:09 offby1: how new is that?
23:10 chandler: Dunno. It's in the 5.0.1 release.
23:10 chandler: rudybot: init racket
23:10 rudybot: chandler: your racket sandbox is ready
23:12 lisppaste: chandler pasted "the example datalog program from the documentation" at http://paste.lisp.org/display/113150
23:12 chandler: rudybot: init http://paste.lisp.org/display/113150/raw
23:12 offby1 drums fingers
23:12 offby1: chandler: you're one of the few people who knows that "init" can take a URL
23:12 offby1: I think the other people who know that are eli and me
23:12 rudybot: chandler: error: with-limit: out of time
23:12 offby1: try again
23:12 chandler: rudybot: init http://paste.lisp.org/display/113150/raw
23:13 offby1: humph
23:13 rudybot: chandler: error: with-limit: out of time
23:13 chandler: I have a feeling this isn't going to work.
23:13 chandler: rudybot: init racket
23:13 offby1: memory is very tight on that box, so it pages a lot
23:13 rudybot: chandler: your racket sandbox is ready
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23:15 chandler: rudybot: eval ((lambda () (display "Hi!") (define x 42) x))
23:15 rudybot: chandler: ; Value: 42
23:15 rudybot: chandler: ; stdout: "Hi!"
23:15 chandler: (Yes, I read release notes.)
23:15 offby1: there's a datalog/sexp/lang.rkt
23:16 offby1: .oO("release notes"?)
23:19 eli: rudybot: eval (version)
23:19 rudybot: eli: your sandbox is ready
23:19 rudybot: eli: ; Value: "5.0.1"
23:19 eli: offby1: built from source?
23:22 neilv: is there a trick to git cloning matthew's gr2 stuff? i tried it the other day, but got intermittent errors, so probably i was doing it wrong
23:22 offby1: eli: ayup
23:22 offby1: took for-effing-ever, due to the limited RAM
23:23 eli: offby1: So you built from the `release' branch?
23:26 offby1: hmm ... I think so.  Lemme check
23:26 offby1: yep
23:27 offby1: commit d8fc09c New Racket version 5.0.1.
23:27 chandler: Why not build it locally and upload to the server?
23:27 offby1: not a bad idea.
23:28 offby1: architectures _might_ differ, but I don't actually know that they do
23:28 offby1: ah, they do; the Xen host is x86_64 whereas your humble svt has but puny 32-bit boxes at home.
23:30 eli: offby1: it doesn't matter much, but you're a few commits behind the real 5.0.1
23:30 chandler: The OS on the Xen host won't run 32-bit binaries? It'd save some of your precious RAM if you could.
23:30 offby1: *gasp*
23:30 offby1: chandler: I assume it would.  The real answer is "I didn't think of building at home".
23:31 chandler: What's that Xen instance running?
23:31 offby1: Ubuntu 10.04 x86_64
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23:31 neilv: if you build it at home, it's only a 300MB upload :)
23:32 offby1: that'd be OK actually.
23:32 offby1: it'd take way less time than building over there.
23:32 offby1: I'll try that next time (or else I'll just wait for eli to release the binary package).
23:32 chandler: The official binaries are *much* smaller than that. I don't see why you'd have to upload 300MB.
23:33 chandler: Running a 32-bit Racket is probably a good idea in this situation. It might stop that incessant swapping or at least make it less frequent.
23:35 offby1: huh, never occurred to me.
23:37 neilv: my install tree for x86 32-bit is 300MB, 90% of which is non-bin (mostly collects and docs). eventually i'd would be nice to have a server install (no gui stuff, no docs) that's 50MB disk, for running on cloud servers that charge for system image size
23:37 chandler: Running a 32-bit OS might help too, but presumably that's water over the dam at this point. :-)
23:40 neilv: if racket server install tree were 50MB, i think i could fit the entire server disk image in 256MB uncompressed