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02:11 singalong: are there any koans for racket (even just r5s5 scheme would do)? I'm referring to something like the ruby-koans which help learn the language.
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08:14 PLT_Notify: racket: master Eli Barzilay * 7f57fce (1 files in 1 dirs): Fix the bgcolor on the mailman pages. ... - http://bit.ly/goO2Yh
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08:51 PLT_Notify: racket: master Eli Barzilay * 020946c (1 files in 1 dirs): Disable xdg-open, since it seems like it suffers from the same problem ...
08:51 PLT_Notify: racket: master commits 7f57fce...020946c - http://bit.ly/gbNzUI
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09:36 PLT_Notify: racket: release Sam Tobin-Hochstadt * 45d06c5 (1 files in 1 dirs): Fix undocumented binding. ...
09:36 PLT_Notify: racket: release Robby Findler * 4895b6f (1 files in 1 dirs): added in recent changes ...
09:36 PLT_Notify: racket: release Robby Findler * 5488669 (0 files in 0 dirs): removed drscheme man page ...
09:36 PLT_Notify: racket: release Robby Findler * 61f3f31 (1 files in 1 dirs): fixed a bug in the way PR 11775 was fixed ...
09:36 PLT_Notify: racket: release Eli Barzilay * fef8785 (1 files in 1 dirs): Fix typo ...
09:36 PLT_Notify: racket: release John Clements * 72aae52 (2 files in 2 dirs): updates to history ...
09:36 PLT_Notify: racket: release Eli Barzilay * baca1d6 (1 files in 1 dirs): Fix the bgcolor on the mailman pages. ...
09:36 PLT_Notify: racket: release Eli Barzilay * aba5580 (1 files in 1 dirs): Add `-j 1' to builds, and `--disable-libffi' to configure. ...
09:36 PLT_Notify: racket: release Eli Barzilay * 498b5d5 (1 files in 1 dirs): Disable xdg-open, since it seems like it suffers from the same problem ...
09:36 PLT_Notify: racket: release Casey Klein * 4f1faf5 (1 files in 1 dirs): Updates Redex history for v5.1.1 release ...
09:36 PLT_Notify: racket: release commits 1601f8b...4f1faf5 - http://bit.ly/fR6TNW
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15:37 wesh: hi :') can someone explain to me why i have problem with float ? (with drracket 5.1 ^^")
15:39 offby1: wesh: not unless you give us more detail
15:40 offby1: maybe you ate too much, and that's why you're sinking?
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16:07 wesh: for example, when i execute ' (printf "~a" 0.9) '
16:07 wesh: the result is "0.0"
16:08 offby1: hm, lemme try
16:08 offby1: rudybot: (format "~a" 0.9)
16:08 rudybot: *offby1: your racket sandbox is ready
16:08 rudybot: *offby1: ; Value: "0.9"
16:08 offby1 scratches head
16:08 DT``: > (printf "~a" 0.9)
16:08 DT``: 0.9
16:08 DT``: that's just floats being floats.
16:08 offby1: rudybot: (printf "~a" 0.9)
16:08 rudybot: *offby1: ; stdout: "0.9"
16:08 offby1: *shrug*
16:09 offby1: wesh: perhaps your computer is infected with gremlins.
16:09 wesh: no no :'p
16:09 wesh: i'm not the only
16:09 wesh: my friend has the same problem ^^"
16:09 offby1: well, out of you, DT``, and me, you are indeed the only one with this problem :)
16:10 offby1: you'll have to describe in more detail what you're doing, since obviously you haven't provided enough for DT`` and I to see what you're seeing.
16:10 DT``: wesh, floats are tricky beasts.
16:10 offby1: sure.
16:10 (join) Jyu
16:10 offby1: but going from 0.9 to 0 seems rather a large jump, even for a tricky float.
16:10 Jyu: hi
16:10 wesh: yes
16:11 wesh: vazy, explique leur, j'capte rien moi -_-"
16:11 Jyu: someone know how rotate a bitmap in racket/gui ?
16:11 offby1: 
16:11 offby1: rudybot: t8 fr en vazy, explique leur, j'capte rien moi -_-"
16:11 rudybot: *offby1: vazy says theirs nothing j'capte me-_-"
16:11 Jyu: :rire:
16:12 DT``: actually, I remember a bug in drracket that made all the floats print as 0.0.
16:12 wesh: not only print :'/
16:12 wesh: all calculations
16:12 DT``: yeah, because they print as 0.0.
16:13 DT``: wesh, try doing it from `racket''s repl.
16:13 wesh: for example (+ 2.5 2.0) returns 4.0
16:13 DT``: that's weird.
16:13 wesh: racket repl ?
16:13 DT``: the `racket' executable.
16:13 DT``: not from drracket.
16:13 Jyu: you've the same problem DT ?
16:13 offby1: wesh: what language level are you using?  Perhaps it's some strange "truncate to integers" language.
16:13 Jyu: no
16:14 Jyu: it's from ubuntu
16:14 wesh: ah
16:14 DT``: Jyu, I *had* the same problem.
16:14 wesh: #lang racket
16:14 offby1: wesh: bummer.
16:14 wesh: bummer? ^^"
16:15 wesh: ca veut dire quoi bummer ..
16:15 offby1: meaning, that's the language I use, too, so your telling me that didn't enlighten me.
16:15 offby1: rudybot: t8 fr en ca veut dire quoi bummer
16:15 rudybot: *offby1: What it means bummer
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16:15 offby1: rudybot: t8 en fr "bummer" means "that's too bad"
16:15 rudybot: *offby1: «Poisse» signifie «qui est trop mauvais»
16:15 wesh: ah :'p
16:15 Jyu: rudy bot traduit ? x.x
16:16 offby1: of course
16:16 wesh: c'est magique oO
16:16 offby1: it's just Google Translate
16:16 Jyu: ah ^^'
16:16 offby1: it's nice that google lets anyone call that API.
16:16 offby1: wesh: well, I just tried (+ 2.5 2.0) in DrRacket, and got 4.5.
16:17 offby1: what version of DrRacket?
16:17 wesh: so.. i'll try to reinstall drRacket 5.1
16:17 Jyu: i'm going to try..
16:18 wesh: ué :rire:
16:18 wesh: version 5.1
16:18 Jyu: on windows (+ 5.0 1.5) return 6.5
16:18 Jyu: on ubuntu it return 6.0
16:18 Jyu: wtf
16:19 wesh: 5.1 ?
16:19 Jyu: yes
16:19 Jyu: maybe an installation probleme
16:19 Jyu: problem*
16:19 wesh: j'reboot linux
16:20 offby1: rudybot: (+ 5.0 1.5)
16:20 rudybot: *offby1: ; Value: 6.5
16:20 offby1: rudybot: (banner)
16:20 rudybot: *offby1: ; Value: "Welcome to Racket v5.1.\n"
16:20 offby1: *shrug*
16:20 Jyu: :o
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16:22 Jyu: offby1, do you know how can I rotate a bitmap% ?
16:23 offby1: nope
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16:24 Jyu: okay :/
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16:41 wesh: re ^^" offby1, are you still here?
16:41 offby1: no
16:42 offby1: I mean yes
16:42 wesh: :'p
16:42 wesh: i just install racket 5.1 and the problem has not changed
16:42 wesh: Bienvenue dans DrRacket, version 5.1 [3m].
16:42 jonrafkind: wesh, whats your $LANG set to
16:42 wesh: Langage: racket; memory limit: 128 MB.
16:42 offby1: can you describe, with _great_ precision, exactly what you're typing?
16:42 wesh: > (+ 5.0 1.1)
16:42 wesh: 6.0
16:43 offby1: wesh: do you have a directory named ~/.racket ?
16:43 offby1: maybe it's time to invoke the magical name of eli
16:43 offby1: Eli, Eli, lama sabachthani
16:44 wesh: euh, i have directory name ~/racket5.1
16:44 jonrafkind: wesh, whats your $LANG set to
16:44 offby1: jonrafkind: oho!
16:44 wesh: #lang racket
16:44 jonrafkind: no
16:44 jonrafkind: echo $LANG
16:44 jonrafkind: on the command line
16:44 wesh: ah ^"
16:44 offby1: is there some locale that doesn't like fractions?
16:44 offby1: (and does racket's printer honor locales?)
16:44 jonrafkind: there was some wierd error with non-C locale's and rational math
16:44 wesh: no result oO
16:44 jonrafkind: no one could explain it
16:44 offby1: jonrafkind: weird indeed.
16:45 jonrafkind: wesh can you paste the output of typing 'env'
16:45 jonrafkind: in some pastebin site
16:45 wesh: weird?
16:47 wesh: echo $lang returns no matches :'/
16:48 offby1: upper-case, please
16:48 offby1: do "env" and paste the output, like jonrafkind said
16:50 wesh: ORBIT_SOCKETDIR=/tmp/orbit-sisi SSH_AGENT_PID=1537 TERM=xterm SHELL=/bin/bash XDG_SESSION_COOKIE=6b5c60142a2634cedcdd5b034d4d9d9c-1303590047.444389-1602530466 WINDOWID=65011715 GNOME_KEYRING_CONTROL=/tmp/keyring-cNOUBy GTK_MODULES=canberra-gtk-module USER=sisi LS_COLORS=rs=0:di=01;34:ln=01;36:hl=44;37:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:su=37;41:sg=30;43:ca=30;41:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:
16:50 jonrafkind: thats it?
16:51 wesh: when i do 'env', is what is returns
16:52 wesh: with much other information .. but I do not have room to put everything
16:52 jonrafkind: type 'LANG=C racket'
16:52 jonrafkind: and inside the prompt do (+ 5.0 1.1)
16:53 wesh: Welcome to Racket v5.0.2. > (+ 5.0 1.1) > 6.1
16:53 wesh: that works because it's 5.0.2
16:54 jonrafkind: so 5.0.2 always worked, and its only 5.1 that doesnt work?
16:54 wesh: yes
16:54 jonrafkind: ok so try it with 5.1
16:54 wesh: with linux..
16:55 wesh: i already try
16:55 wesh: Bienvenue dans DrRacket, version 5.1 [3m]. Langage: racket; memory limit: 128 MB. > (+ 5.0 1.1) 6.0
16:55 wesh: i tried this at top level
16:55 jonrafkind: with LANG=C before you exceute racket 5.1
16:55 jonrafkind: do you know what im talking about?
16:56 bremner_: wait, shouldn't it be 5,1 in french?
16:56 wesh: euh, i have to run racket 5.1 with terminal no ?
16:56 bremner_: yes
16:56 jonrafkind: yes, how else are you running it?
16:58 wesh: it returns x,... when i do something like this : "> (sqrt 5.0) 2,23606797749979.0 "
16:58 wesh: you think it's a configuration problems ?
16:58 bremner_: yeah, I remember a russian guy with a similar problem
16:59 wesh: how can i settle the problem?
17:00 wesh: drracket options ?
17:00 bremner_: well, if you don't mind English, running "LANG=C racket" might help
17:00 bremner_: or "LANG=C drracket"
17:03 wesh: that launches dr racket 5.0.2
17:04 wesh: this*
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17:09 Dodek: hello
17:11 Dodek: i need an immutable dictionary-like data structure -- is there anything like this in racket?
17:11 Dodek: i would really prefer not to write it one more time.
17:12 jonrafkind: hash
17:12 Dodek: oh here it is
17:12 Dodek: thank you
17:16 offby1: Dodek: there are a whole bunch of such data structures.
17:16 offby1: hashes, alists, others.
17:16 offby1: and there's also a "dictionary" API for accessing them all uniformly.
17:19 Dodek: what i basically need is a mapping from a pair of indices to some value
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17:20 offby1: sounds like a dictionary to me.
17:26 offby1: rudybot: (define d (make-immutable-hash (list (cons (set 1 2) "A set of two"))))
17:26 rudybot: *offby1: Done.
17:26 offby1: rudybot: (hash-ref d (set 2 1))
17:26 rudybot: *offby1: ; Value: "A set of two"
17:26 offby1: behold! an immutable hash which maps pairs of indices to some value
17:27 Dodek: rudybot: (hash-ref d (set 1 2))
17:27 rudybot: Dodek: your sandbox is ready
17:27 rudybot: Dodek: error: reference to undefined identifier: d
17:27 Dodek: ah
17:27 Dodek: (define d (make-immutable-hash (list (cons (set 1 2) "A set of two"))))
17:27 Dodek: rudybot: (define d (make-immutable-hash (list (cons (set 1 2) "A set of two"))))
17:27 rudybot: Dodek: error: reference to undefined identifier: set
17:27 Dodek: hm.
17:27 Dodek: i guess i need to require some module
17:27 offby1: hm indeed
17:27 offby1: I didn't need to.
17:28 offby1: Dodek: type "rudybot: init racket", then try again
17:28 Dodek: anyway, i assume that `set' is unordered
17:28 offby1: yep
17:28 offby1: rudybot: init r5rs
17:28 rudybot: *offby1: your r5rs sandbox is ready
17:28 Dodek: and i need ordered indices
17:28 offby1: rudybot: set
17:28 rudybot: *offby1: error: reference to an identifier before its definition: set in module: 'program
17:28 offby1: rudybot: init racket
17:28 rudybot: *offby1: your racket sandbox is ready
17:28 offby1: rudybot: set
17:28 rudybot: *offby1: ; Value: #<procedure:set>
17:28 Dodek: rudybot: init racket
17:28 rudybot: Dodek: your racket sandbox is ready
17:28 Dodek: rudybot: set
17:28 rudybot: Dodek: ; Value: #<procedure:set>
17:28 Dodek: great
17:28 offby1: Dodek: strange.  Had you said "rudybot: init r5rs" recently?
17:29 Dodek: no, i did not
17:29 offby1: weird.
17:29 Dodek: never spoke to rudybot before, in fact.
17:29 offby1 glares at rudybot
17:29 rudybot glares back
17:32 offby1: oh, also:
17:32 offby1: rudybot: (dict-ref d (set 1 2))
17:32 rudybot: *offby1: error: reference to an identifier before its definition: d in module: 'program
17:32 offby1: pff
17:32 offby1: rudybot: (define d (make-immutable-hash (list (cons (set 1 2) "some value"))))
17:32 rudybot: *offby1: Done.
17:32 offby1: rudybot: (dict-ref d (set 1 2))
17:32 rudybot: *offby1: ; Value: "some value"
17:32 offby1: my point being that you can use the generic "dict-" functions on hashes.
17:33 Dodek: well, i never actually used racket before
17:34 Dodek: i needed some functional language with an ability to create executables
17:34 Dodek: tried haskell, but it was quite painful
17:34 Dodek: and i heard racket is quite nice
17:34 offby1: yep, racket should do OK for you
17:34 offby1: it's not really a function language though.
17:35 offby1: It merely makes it easy to write functional programs.
17:35 offby1: But you can go wild with mutation if you want to.
17:35 Dodek: isn't it more of an functional language than common lisp?
17:35 offby1: *shrug*
17:35 Dodek: s/an/a/
17:35 Dodek: and yet they call CL functional. :)
17:35 offby1: not even sure what "functional language" means, unless it means something like "a language in which you can not possibly modify state".
17:36 offby1: in which case Haskell comes close
17:36 offby1: what matters to me is that racket is fun :)
17:36 Dodek: i hope so
17:36 Dodek: :)
17:42 evhan doesn't understand this new obsession with "purely-functional"
17:42 offby1 however indeed understands this new obsession with fried-egg hamburgers
17:43 evhan: plural. this is important.
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23:00 rekahsoft: so i hear define-struct is depreciated and the prefered way now is through struct..is there something similar for define-struct/contract
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23:37 rekahsoft: is anyone there to give me some quick advice
23:38 rekahsoft: wondering about define-struct being depreciated and struct (for creating structures)..i want to have a contract associated along with it..previously i used define-struct/contract but now it seems to be depreciated..
23:39 rekahsoft: i assume the best way is to use struct with a #:gaurd? or maybe provide/contract?
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23:43 offby1: beats me
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