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02:44 ohwow: Is there a generic ->string function?
02:45 ohwow: Which can convert almost anything to string?
02:48 jonrafkind: (format "~a\n" anything)
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02:49 ohwow: i see, thanks
02:50 jonrafkind: oh dont need the \n, just a habit
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02:54 ohwow: rudybot: eval (with-output-to-string (lambda()(format "~a" 'hello)))
02:54 rudybot: ohwow: your sandbox is ready
02:54 rudybot: ohwow: ; Value: ""
02:54 ohwow: rudybot: eval (with-output-to-string (lambda () (format "~a" 42)))
02:54 rudybot: ohwow: ; Value: ""
02:55 ohwow: oh wait
02:55 ohwow: it's format
02:55 ohwow: for some reason i thought it's printf :(
02:55 ohwow: damn i should get my coffee
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13:35 ohwow: so, mcons is the only way to get mutable list in racket?
13:35 jonrafkind: yea
13:40 bremner_: or #lang r5rs, which amounts to the same thing
13:43 offby1: rudybot: (object->string 1234)
13:43 rudybot: offby1: your sandbox is ready
13:43 rudybot: offby1: error: reference to an identifier before its definition: object->string in module: 'program
13:43 offby1: hmm
13:45 offby1: rudybot: (with-output-to-string (lambda () (display 123)))
13:45 rudybot: offby1: ; Value: "123"
13:45 offby1: rudybot: (with-output-to-string (lambda () (display "123")))
13:45 rudybot: offby1: ; Value: "123"
13:45 offby1: rudybot: (with-output-to-string (lambda () (display 'frotz)))
13:45 rudybot: offby1: ; Value: "frotz"
13:45 offby1: rudybot: (with-output-to-string (lambda () (display #"oh, wow")))
13:45 rudybot: offby1: with-output-to-string
13:45 offby1: rudybot: eval (with-output-to-string (lambda () (display #"oh, wow")))
13:45 rudybot: offby1: ; Value: "oh, wow"
13:46 offby1: rudybot: eval (define (object->string o) (with-output-to-string (lambda () (display o))))
13:46 rudybot: offby1: Done.
13:46 offby1: rudybot: eval  (object->string (current-output-port))
13:46 rudybot: offby1: ; Value: "#<output-port:string>"
13:46 offby1: rudybot: eval  (object->string eof)
13:46 rudybot: offby1: ; Value: "#<eof>"
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13:54 ohwow: offby1:
13:54 ohwow: [08:43] < ohwow> Is there a generic ->string function?
13:54 ohwow: [08:44] < ohwow> Which can convert almost anything to string?
13:54 ohwow: [08:47] < jonrafkind> (format "~a\n" anything)
13:55 ohwow: :)
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13:59 ohwow: What if I do (set! lst (cons 'a lst)) ?
14:01 bremner_: you get a very long list...
14:01 bremner_: iirc.
14:03 ohwow: well i get what i need: a list with 'a consed on it
14:03 ohwow: but
14:03 ohwow: idk
14:03 ohwow: I am writing a networking app and I need to store a list of peers, so I figured that a list datastructure would be nice for it
14:07 bremner_: oh, right, it depends on evaluation order, which I got wrong.
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14:19 offby1: How does one turn a number into a string, with some leading zeroes?  (mystery 12 3) => "012"
14:19 offby1: There used to be a PLaneT package that did all kinds of slick formatting like this, but I've forgotten its name
14:19 offby1: doesn't seem to be any way to do it with built-in racket stuff
14:19 offby1: fmt.plt
14:20 offby1: rudybot: seen foof
14:20 rudybot: offby1: foof was seen in/on #scheme sixteen hours ago, saying "Is that expensive?", and then foof was seen in/on #scheme six hours ago, saying "rotty: fmt patch applied (belatedly)"
14:23 DT``: offby1, SRFI-48's format has that.
14:23 DT``: (format "~3F" 12)
14:23 DT``: it's padded with spaces, though.
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14:44 offby1: hmph
14:44 offby1: easier to roll my own, alas
14:45 offby1: it seems as if the "mzscheme" language, in PLT scheme 4, had a function called call-with-output-string, but that the current version of that language lacks it.  Is this true?  If so, shouldn't it be added back?  (planet ashinn/fmt:1:1/fmt) breaks because of its absence.
14:50 cipher: anyone notice that #lang lazy's version of take is (take <count> <list>) whereas #lang racket is (take <list> <count>)
14:51 jonrafkind: probably to make lazy more like haskell
14:52 bremner_: the point in haskell is partial application. Not sure that is relevant here.
14:53 bremner_: well, I guess even the haskell order is pretty subjective
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17:38 offby1: OK folks, I just wrote a function that takes a channel, and returns a sequence; the sequence contains those items that are gotten from the channel.  It's a simple function.  But I'm wondering if I even needed to write it ... I'd have expected something like this to be built-in.  Is there any such thing?
17:39 offby1: http://ix.io/1IY if you wanna peek
17:39 offby1: (yes, I realize that I'm hard-coding the sentinel value, and should really make it an argument)
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18:26 Lajla: What iz vhith zhisch client
18:26 Lajla: I cannot remove this channel from my autojoin list
18:26 Lajla: it just comes back every time
18:26 Lajla: offby1, you
18:26 Lajla: provide me with zhe answers that I seek
18:27 Lajla: to finally part my ways with that which does not respect my right to completely random nicknames for no adequately justified reason
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20:34 offby1: OK, so how do I fix "compile: access from an uncertified context to unexported variable"?
20:34 offby1: Google sends me to discussions which I don't understand :-|
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20:41 carleastlund: offby1, often the easiest way is to export the variable.  That is, if the reference is to "foo", then add "(provide foo)".
20:41 offby1: I'm not sure what the variable in question is ... the obvious one _is_ being exported :-(
20:41 carleastlund: Oh, it doesn't say which?  Hmm.
20:42 offby1: no, it doesn't :-|
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20:42 offby1: doesn't mention any of my modules, either
20:42 carleastlund: Is that the entirety of the output you get?
20:42 offby1: no, hold on
20:42 offby1: http://ix.io/1IZ
20:43 carleastlund: It does tell you the variable in question, it/s or/c/proc.
20:43 offby1: well ... uh ...
20:43 offby1: that string doesn't appear anywhere in my source, as far as I know.
20:43 offby1: It's true, I am using "or/c"
20:43 carleastlund: That's from the contract system.
20:43 offby1: but that's built-in.
20:44 offby1: I don't even know what it would mean to export that.
20:44 carleastlund: Errors like this occur when macros try to take apart subexpressions they shouldn't.  Are you playing any crazy macro games?  If you are, that's probably your problem.  If you aren't, this is probably someone else's bug.
20:44 offby1: no macros at all in my code
20:44 offby1: A fair amount of "unquote", however
20:44 offby1: (and when I _do_ write macros, they're dead simple, as in define-syntax-rule)
20:45 carleastlund: Yeah, I think you've uncovered a bug, but your code is not the cause.
20:45 offby1: it started happening as soon as I took one definition -- (define stringy? (or/c string? bytes?)) -- and moved it from the module that used it, into a separate, otherwise empty module (and then provided it)
20:45 offby1: I suppose I could move it back
20:45 carleastlund: Still, if you could boil your code down to something short, reproducible, and that you can share, it'd be great if you could report that bug.
20:45 offby1: yep
20:47 offby1: nuts
20:48 carleastlund: What version are you using?  Something recent from the repo, or a release?
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20:49 carleastlund: never mind, the possibly-relevant code I'm looking at isn't recent
20:51 offby1: 5.1.1 anyway
20:51 offby1: I worked around it by moving the definition of that contract back where it was :-(
20:51 offby1: couldn't repro it simply
20:52 carleastlund: Most bugs can be reduced fairly quickly by a sort of binary search -- cut things out of your program; if the bug stays, leave them out.  Continue until minimal.
20:52 carleastlund: Alternately, if it's code you don't mind sharing, let me have a crack at it.  This doesn't seem like a bug we should let slide.
20:54 carleastlund: You had just the one definition in that module with or/c?  Can you show me just that module, offby1?
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21:18 offby1: I'm happy to share the code, but it's a giant mess; I suspect it'd take a fair amount of effort to repro.
21:18 offby1: I can easily show you the module; hold on
21:19 offby1: http://ix.io/1J0
21:19 offby1: not much to it :)
21:21 offby1: carleastlund: OK, you really up for this?  It'll involve cloning two (reasonably small) git repositories, and probably a bit more setup
21:23 carleastlund: offby1, I'll start in a bit by putting that through the macro stepper and seeing what I can see.
21:23 offby1: I didn't understand that -- did you want the URLs to the git repositories?
21:23 offby1: or are you just going to chew on the tiny file?
21:25 carleastlund: offby1, just the tiny one.  Not worth going for the whole thing if I can make headway with just that :)
21:25 offby1: sho nuff
21:25 offby1: holler if you want more pain
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22:48 Sentreen: Hello peeps, got a small question to ask, does anybody else get a crash when they use a gauge% with vertical as style tag?
22:50 Sentreen: (using OSX btw)
22:55 offby1 stares blankly
22:56 offby1: paste something tiny that repros the problem, I'll try it
22:56 offby1: ... assuming it's not difficult.
22:56 offby1: I use Linux by the way.
22:56 offby1: actually it doesn't even matter if it repros for me or not -- crash == bug.
22:56 offby1: end of story
22:58 Sentreen: yeah indeed, just wanted to see if it might have been a known issue :)
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