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00:52 mithos28: Just got my fix to TR so that it can correctly understand contravariant structures
00:53 mithos28: only had to rewrite half of the struct handling code
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03:22 mithos28: Is there an easier way of merging a list of sets than (apply set-union (set) list-of-sets)
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07:21 Haffe: In racket object does the send method always return void?
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07:38 Cryovat: Haffe: It wouldn't be very useful then
07:39 Cryovat: How would you be able to implement getters and setters?
07:39 Haffe: Yeash.
07:39 Haffe: I looked it over.
07:39 Haffe: It seems for-each is my culprit.
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08:11 RacketCommitBot: [racket] plt pushed 5 new commits to master: http://git.io/MZvjZA
08:11 RacketCommitBot: [racket/master] racket/gui: get `get-scroll-pos', etc., arguments for `canvas%' - Matthew Flatt
08:11 RacketCommitBot: [racket/master] racket/gui: make `editor-canvas%' fail more gracefully on too-large content - Matthew Flatt
08:11 RacketCommitBot: [racket/master] fix problems with `raise-range-error' - Matthew Flatt
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10:08 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/B0zajA
10:08 RacketCommitBot: [racket/master] scribble: another Latex/PDF section repair - Matthew Flatt
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14:22 aidy: Does anyone know a working alternative to http://synthcode.com/scheme/fmt/ ?
14:23 mithos28: http://docs.racket-lang.org/unstable/cat.html?q=cat#(def._((lib._unstable/cat..rkt)._cat)), maybe?
14:25 mithos28: It looks like the fmt library has everything but the kitchen sink, is there a particular feature you want?
14:25 aidy: might be a good start, but I'm actually looking for the C-formatting functionality
14:25 aidy: forgot to mention that
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14:26 mithos28: http://planet.plt-scheme.org/package-source/dherman/c.plt/4/0/planet-docs/c/index.html
14:26 rudybot: http://tinyurl.com/9mlkkfe
14:27 aidy: http://planet.plt-scheme.org/package-source/dherman/c.plt/4/0/planet-docs/c/pc.html
14:27 rudybot: http://tinyurl.com/8acq36o
14:27 aidy: :(
14:28 aidy: Will have a look though
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14:35 asumu: aidy: does the fmt planet package on work?
14:35 asumu: *not
14:36 aidy: no, it's got lots of set!s etc
14:36 bremner: aidy: you mean something like the C printf function?
14:37 asumu: Hmm, that's too bad. Maybe it can be ported and someone can ask Alex Shinn to update the package.
14:37 aidy: I managed to make it run somewhat by using #lang r5rs etc, but while it runs without errors the output isn't actually correct
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15:01 aidy: asumu: the code doesn't look that good to my eyes though
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15:30 asumu: aidy: fair enough, I've never looked at the code. I heard Jos Koot also has a PLaneT package for formatting.
15:31 asumu: Unfortunately not scribbled yet, I think.
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16:38 asumu: Hmm, fixed one issue with my patch but now it segfaults. Sigh.
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17:36 Cryovat: asumu: Fun :(
17:39 Cryovat: How is the hunt going?
17:44 asumu: I got rid of the segfault. It was just a case of not checking for NULL.
17:44 asumu: Still doesn't completely work though. :p
17:45 Cryovat: Got enough coffee to get through this? ;)
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18:47 ytti: Hello.. how do I clear the history in the interactions window in DrRacket? I am using it on Ubuntu Linux. Clicking Run doesn't help... history persists across sessions even!
18:47 mithos28: ytti: Why do you want to do that?
18:47 asumu: ytti: try deleting (readline-input-history ...) in .racket/racket-prefs.rktd (make a backup)
18:48 asumu: Err, sorry that's probably xrepl
18:48 asumu: It's probably plt:framework-pref:drracket:console-previous-exprs
18:48 ytti: mithos28: because I don't want commands that I typed a few days/weeks ago showing up and cluttering my history.
18:56 ytti: thank you asumu
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18:56 asumu: NP.
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22:05 asumu: Whoa, saw this comment on HN: http://news.ycombinator.com/item?id=4467106
22:06 asumu: (see "what we use" paragraph)
22:07 mithos28: It seems weird to be doing simulations in a language that is not particularly fast. None of the languages the mention are.
22:11 asumu: Could be for frontend work.
22:11 mithos28: part 4 says otherwise, but yeah that would make more sense
22:12 asumu: Oh, hmm. Maybe they use other languages too, who knows.
22:15 mithos28: asumu: Do you use TR much?
22:18 asumu: mithos28: not too much recently aside from examples, why?
22:19 mithos28: I'm looking for another small feature request/bug report to fix while I wait for Sam to comment on my current ones
22:22 asumu: I have one in mind but it's probably not small. When I was trying to make loops work on sets in TR, the lack of occurence typing for when/unless was a problem.
22:22 mithos28: can you give an example?
22:23 mithos28: or point to an existing pr?
22:26 asumu: I believe this is the relevant PR: http://bugs.racket-lang.org/query/?debug=&database=default&cmd=view+audit-trail&cmd=view&pr=11920
22:26 rudybot: http://tinyurl.com/cvc92pu
22:26 asumu: but while looking, I found a smaller bug I reported: http://bugs.racket-lang.org/query/?debug=&database=default&cmd=view+audit-trail&cmd=view&pr=12591
22:26 rudybot: http://tinyurl.com/c6qfn34
22:29 mithos28: The first one is definitely a large one, as Sam said it would take reworking a lot of the type system. I'll take a look at the second.
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22:40 asumu: Hmm, what can cause the racket executable to return a shell code of 1 but not actually raise an exception or segfault?
22:41 mithos28: (exit 1)
22:41 asumu: In a program with no exit statements.
22:42 asumu: (note: this isn't release Racket but a version I've broken at the C level...)
22:42 mithos28: Nothing that I can think of
22:44 asumu: Ah, I think it's a part of cmdline.inc. Some error handling in the C implementation of the REPL returns code 1 in some cases.
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23:34 asumu: rudybot: (abort-current-continuation (default-continuation-prompt-tag))
23:34 rudybot: asumu: your sandbox is ready
23:34 rudybot: asumu: error: call-with-continuation-prompt: context (application of default prompt handler) expected 1 value, received 0 values
23:37 asumu: Apparently if you abort the continuation in load mode, the racket executable just dies.
23:37 asumu: Or rather, returns exit code 1.
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23:48 lewis1711: (define-syntax-rule (t '(a b c))  '((a . b) c))
23:48 lewis1711: is there anyway i could make that over a list?
23:48 mithos28: lewis1711: What is it you are trying to do?
23:49 lewis1711: mithos28: take a list of things like '((1 2 3) (a b c)) and get back a hashtable like #hash(((a . b) c) ((1 . 2) 3)
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23:50 mithos28: rudybot: (define (f triple) (list (cons (first triple) (second triple)) (third triple)))
23:50 rudybot: mithos28: your sandbox is ready
23:50 rudybot: mithos28: Done.
23:51 mithos28: rudybot: (map f '((1 2 3) (a b c)))
23:51 rudybot: mithos28: ; Value: (((1 . 2) 3) ((a . b) c))
23:52 lewis1711: huh, I did not know you could do (cons atom atom) and get back a pair.
23:52 lewis1711: thanks mithos28
23:52 mithos28: no problem
23:52 lewis1711: I had some god awful quasiquote procedure attempt that was hurting my eyes
23:53 mithos28: you could also use match
23:53 asumu: Argh. I have just realized that the pain I'm having with call/cc is that call/cc & delimited control have different semantics in loaded programs.
23:53 mithos28: asumu: Isn't racket's call/cc delimited?
23:53 asumu: It is. I really meant call/cc vs. prompt/abort.
23:54 mithos28: ah, so loaded programs have a special abort handler?
23:55 asumu: In a sense. Or you could say they don't have an abort handler.
23:55 asumu: And an abort in a loaded program will just (exit 1)
23:56 mithos28: Isn't that an abort handler of (lambda args (exit 1))
23:56 asumu: e.g., compare $ racket -e "(let () (define f (call-with-continuation-prompt (lambda () (call/cc (lambda (k) k))))) (f 5))"
23:56 asumu: racket -e "(abort-current-continuation (default-continuation-prompt-tag) 5)"
23:57 asumu: mithos28: sure, but it's not implemented as a handler but as a setjmp in C code.
23:58 asumu: It's an annoying difference because Racket's test suite is loaded.
23:58 mithos28: Isn't it not a bug?
23:59 asumu: I don't know if it's a bug or intentional. I'll just ask on the list.