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00:17 neilv: is the users list being moderated, or on a much slower server than before?
00:18 neilv: or maybe just lots of addressee timeouts are slowing it down lately
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05:22 tim-brown: Happy New Year, one and all!
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06:29 Blkt: tim-brown: :D
06:47 tim-brown: has anyone any opinions on using ? vs. the word lambda in racket code
07:09 bremner: did you mean λ ?
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07:10 bremner: if so, I think you just argued in favour the word lambda
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07:55 tim-brown: or argued in favour of a standard character set over and above ascii!
07:55 tim-brown: bremner: good point
07:57 bremner: well, we have utf8, but I guess it isn't universal yet.
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09:06 tim-brown: bremner: either you or I ain't using UTF-8 (and I'm not sure which :-) )
09:06 bremner points at tim-brown 
09:06 bremner: or some tool is breaking between us.
09:09 tim-brown: so, i can't be sure I can use it to invoke, say rudybot expressions
09:10 tim-brown: also, when opening the discussion, i needed to cut and paste the character in from an external app (vim)
09:11 tim-brown: and remember, when you point a finger at tim-brown, you're pointing three fingers back at yourself :-)
09:13 tim-brown: (i've just spent a week with a three year old, so i've got to get back into behaving like an adult)
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14:12 kmc: in #lang racket, is there a standard library function to get n numbers evenly spaced between x and y?
14:16 jonrafkind: (for/list ([i n]) (+ x (* i (/ (- y x) n))))) maybe?
14:17 jonrafkind: [i (add1 n)] actually
14:19 chandler: why not (for/list ([i (in-range x y (/ (- y x) n))]) i) ?
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14:42 kmc: thanks
14:50 kmc: say i have a property (a boolean-valued function), and I'd like to check that it's true for a bunch of random inputs (numbers, in my case).  is there any existing library for this?
14:50 kmc: it looks like rackunit and test-engine both want fixed test cases
14:51 jonrafkind: (map positive? '(1 -4 2 9 -5))
14:51 jonrafkind: rudybot, (map positive? '(1 -4 2 9 -5))
14:51 rudybot: jonrafkind: your sandbox is ready
14:51 rudybot: jonrafkind: ; Value: (#t #f #t #t #f)
14:51 kmc: i'm looking for something more like Haskell's QuickCheck, if any of you are familiar with it
14:51 jonrafkind: i thought you can write test cases that just return #t
14:52 jonrafkind: I think someone wrote a quickcheck thing for racket..
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15:29 kmc: is there any kind of style checker or static checker i should run over some racket code before i commit?
15:30 jonrafkind: btw heres that quickcheck thing: http://planet.racket-lang.org/display.ss?package=fasttest.plt&owner=cce
15:30 jonrafkind: although ive never used it
15:30 jonrafkind: here is a very simple static checker: http://planet.racket-lang.org/display.ss?package=no-brainer.plt&owner=clements
15:30 rudybot: http://tinyurl.com/72nbau5
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15:46 kmc: thanks
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16:23 danking: rudybot: eval (let ((y 4)) (printf "y: ~a\n" y) (define y 2) y)
16:24 rudybot: danking: your sandbox is ready
16:24 rudybot: danking: ; Value: 2
16:24 rudybot: danking: ; stdout: "y: #<undefined>\n"
16:24 danking: So. I understand that define is causing weirdness, but this was not at all what I expected to happen.
16:24 danking: Thoughts?
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17:06 RacketCommitBot: [racket] plt pushed 3 new commits to master: http://git.io/mVObYw
17:06 RacketCommitBot: [racket/master] Fixing PR12443 - Jay McCarthy
17:06 RacketCommitBot: [racket/master] Improve formlet docs a little - Jay McCarthy
17:06 RacketCommitBot: [racket/master] Adding radio and checkbox groups to formlets - Jay McCarthy
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20:14 RackN00b: Hello Racket-gurus! I was wondering if someone could offer some insight as to why this isn't working... I'll pastbin
20:15 RackN00b: http://pastebin.com/199uAZpr
20:16 RackN00b: The other two tests work but the test for checking the error fails... I guess I'm not comparing the error properly... any ideas?
20:26 offby1: yeah -- when you call "error", that doesn't simply return a value the way your lambda does.
20:26 offby1: Instead it "raises" an "exception"
20:26 offby1: (picture me wiggling my fingers in air quotes)
20:26 offby1: rudybot: eval (+ 1 2 3)
20:26 rudybot: *offby1: your sandbox is ready
20:26 rudybot: *offby1: ; Value: 6
20:26 offby1: rudybot: eval (+ 1 2 (error "What's this?") 3)
20:26 rudybot: *offby1: error: What's this?
20:26 RackN00b: Is there a way to test that I'm getting the correct error message?
20:27 RackN00b: I know that in the student language there's check-error, but I can't seem to figure it out for the full language
20:27 offby1: yes, although I suspect how you do it depends on which language you're using
20:27 offby1: ha
20:27 RackN00b: #lang racket
20:27 offby1: oh!
20:27 offby1: then it's reasonably easy
20:27 offby1: rudybot: eval (with-handlers ([exn?(lambda (e) 0)]) (+ 1 2 (error "What's this?") 3))
20:27 rudybot: *offby1: ; Value: 0
20:28 offby1: RackN00b: firstly, you probably want to use the nice "rackunit" module for writing your tests.
20:28 offby1: rudybot: (check-equal? 2 (+ 1 1))
20:28 rudybot: *offby1: error: reference to an identifier before its definition: check-equal? in module: 'program
20:28 offby1: heh
20:28 offby1: rudybot: (require rackunit)
20:28 rudybot: *offby1: Done.
20:28 offby1: rudybot: (check-equal? 2 (+ 1 1))
20:28 rudybot: *offby1: Done.
20:28 offby1: rudybot: (check-equal? 2 (+ 1 1 1))
20:28 rudybot: *offby1: ; stderr: "--------------------\nFAILURE\nname:       check-equal?\nlocation:   (#<undefined> 1 0 1 26)\nexpression: (check-equal? 2 (+ 1 1 1))\nactual:     2\nexpected:   3\n\nCheck failure\n\n--------------------\n"
20:28 offby1: that basically does what you're already doing.
20:28 offby1: but it also handles errors nicely:
20:28 RackN00b: whoa.... brain just blew up.. I'm like three lines behind!
20:29 offby1: rudybot: (check-exception (thunk (error "This is an expected error")))
20:29 rudybot: *offby1: error: reference to an identifier before its definition: check-exception in module: 'program
20:29 offby1: *sigh*
20:29 offby1: rudybot: (check-exn (thunk (error "This is an expected error")))
20:29 rudybot: *offby1: error: #<undefined>:1:0: check-exn: bad syntax in: (check-exn (thunk (error "This is an expected error")))
20:29 offby1: rudybot: (check-exn exn? (thunk (error "This is an expected error")))
20:29 rudybot: *offby1: Done.
20:29 offby1: *whew*
20:29 offby1: rudybot: (check-exn exn:fail? (thunk (error "This is an expected error")))
20:29 rudybot: *offby1: Done.
20:29 offby1: rudybot: (check-exn exn:fail:contract? (thunk (error "This is an expected error")))
20:29 rudybot: *offby1: ; stderr: "--------------------\nFAILURE\nmessage:    \"Wrong exception raised\"\nexn-message:\"This is an expected error\"\nexn:        #(struct:exn:fail \"This is an expected error\" #<continuation-mark-set>)\nname:       check-exn\nlocation:   (#<undefined> 1 0 1 74)\nexpression: (check-exn exn:fail:contract? (thunk (error \"This is an expected error\")))\nparams:     (#<procedure:exn:fail:contract?> #<procedu
20:30 offby1: basically what I'm trying to show is that rackunit has a built-in thing that says "run this code and make sure it raises the right kind of exception".
20:30 offby1: which is just what you want.
20:30 offby1: Lemme rewrite what you've got to show you how I'd do it.
20:30 RackN00b: Cool thanks
20:33 offby1: ok, check http://pastebin.com/GkCydynF
20:33 offby1: you'd run that by doing "racket whatever-you-named-it"
20:34 offby1: actually what I wrote isn't an exact translation.  _You_ were checking that the exception message was correct, whereas I'm merely checking that there was an exception raised.
20:34 offby1: but that's a detail.
20:35 RackN00b: Ahhh... I see... Cool. Thanks man... I'll play with it a bit later this evening - for now, have to take the kids to "We Bought A Zoo". Damn you Matt Damon!
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20:35 offby1: And I have to go home.
20:35 RackN00b: xheers
20:35 (part) RackN00b
20:35 offby1: (I heard that movie was just "meh", btw)
20:35 offby1: ((which is a pity since Cameron Crowe has made some movies I really loved))
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22:50 ozzloy: oh man, i saw RackN00b and my heart sank
22:51 ozzloy: but it's not that rackn00b
22:51 ozzloy: *whew*
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