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04:44 vu3rdd: what is the difference between match and match*?
04:44 mithos28: match* can match multiple things at once
04:44 mithos28: rudybot: (match* (1 2) ((x y) (+ x y)))
04:44 rudybot: mithos28: your sandbox is ready
04:44 rudybot: mithos28: ; Value: 3
04:45 mithos28: rudybot: (match (list 1 2) ((list x y) (+ x y)))
04:45 rudybot: mithos28: ; Value: 3
04:47 vu3rdd: mithos28: so the value input expression to match* is like a sequence of values?
04:47 mithos28: it is not an expression, it is many
04:48 vu3rdd: list of expressions?
04:48 vu3rdd: I didn't get it in the first reading of the manual.
04:49 mithos28: It works like the translation I did to using match with list
04:49 mithos28: but without actually creating the list
04:49 vu3rdd: yes, thanks. I get it now.
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06:36 Znudzon: Hi . Is it possible to run rackett app on android ?
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09:23 entel: is there a way i can use the range function inside case? id like to avoid typing out the list of numbers if possible
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12:28 wtetzner: does anyone know why this doesn't work? http://pastebin.com/vStYJvCp
12:28 wtetzner: the error i get when compiling is in the comment at the bottom
12:29 mithos28: The issue is in line 14, or 13 in your actual file
12:30 mithos28: I think you just want val not #'val
12:31 mithos28: unless you really want to store a syntax object in the hash
12:31 wtetzner: i do want to store the syntax object
12:32 wtetzner: and then bind it in with-syntax
12:32 wtetzner: in make-func
12:32 wtetzner: i'm wondering why it doesn't think foo is bound
12:32 mithos28: Because you have nothing imported at the template phase
12:34 mithos28: The issue is that the hash-set! of store should be done in the expansion phase of test.rkt
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12:34 mithos28: so move foo out into another module and require it for-template in test2.rkt
12:37 wtetzner: hmm, it's giving the same error
12:37 mithos28: paste again
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12:40 wtetzner: http://pastebin.com/DZ01g4sD
12:40 wtetzner: oh
12:40 wtetzner: haha
12:40 wtetzner: i didn't provide foo
12:40 mithos28: that would help
12:40 wtetzner: cool
12:40 wtetzner: it works now
12:41 wtetzner: i don't really understand what's going on though. where can i read about the different compilation phases?
12:42 mithos28: 'you want it when?', let me get a link
12:42 mithos28: http://www.cs.utah.edu/plt/publications/macromod.pdf
12:42 wtetzner: awesome
12:42 wtetzner: thanks
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12:50 asumu: There is also a guide entry on compilation phases now: http://docs.racket-lang.org/guide/phases.html
12:57 asumu: Oh neat, I hadn't realized that DVH had a functional vector library on PLaneT: http://planet.racket-lang.org/display.ss?package=fector.plt&owner=dvanhorn
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14:15 newbie: hello all
14:15 (nick) newbie -> Guest85422
14:15 Guest85422: anyone awake at this hour? :)
14:16 Guest85422: `
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14:25 Guest85422: ello
14:25 Guest85422: I have a newbie problem
14:26 (part) entel
14:40 Kaylin: hi
14:40 Kaylin: just tell us your problem so if somebody looks in and knows they can answer please
14:43 Kaylin: :(
14:50 asumu: Hit and run IRCer. :p
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15:12 sybex: Is there any point in reading Little Schemer/Seasoned Schemer if I'm going to work through HTDP2e and SICP? Do they cover anything that the latter two don't?
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15:50 asumu: sybex: yes, but which you read also depends on how you learn.
15:50 asumu: The Schemer books are more puzzley and the style works for some people and doesn't for others.
15:51 asumu: The Seasoned Schemer covers continuations, which neither HtDP nor SICP cover IIRC.
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18:21 em: what is the best way to use racket with a database, is there a best database to use or could you use any like postgresql?
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18:56 asumu: em: see the 'db' library. Lets you use MySQL, Postgres, SQlite.
18:56 asumu: (or others via ODBC)
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19:15 RacketCommitBot: [racket] plt pushed 6 new commits to master: http://git.io/aokpFw
19:15 RacketCommitBot: [racket/master] db: updated to new error convention (mostly) - Ryan Culpepper
19:15 RacketCommitBot: [racket/master] db: added variations of concurrency test - Ryan Culpepper
19:15 RacketCommitBot: [racket/master] db: fixed bug in db docs - Ryan Culpepper
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20:09 flaggy: I'm making a very simple program and it uses assoc lists as its main datatype. I'm hoping that it will be easy to save and read that structure from a file. But I'm not sure how to do it. I think maybe I could do it using quote and eval, but maybe there's a simpler way to do it
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20:13 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/fSM7NQ
20:13 RacketCommitBot: [racket/master] attempt to clarify the composition properties of empty-image - Robby Findler
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20:23 RacketCommitBot: [racket] plt pushed 1 new commit to master: http://git.io/eUf8ug
20:23 RacketCommitBot: [racket/master] move the baseline comment to image-baseline from the y-place? docs - Robby Findler
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20:49 wtetzner: are cvectors guaranteed not to be moved by the gc?
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21:38 (nick) sizz_ -> sizz
21:40 flaggy: file->value worked :)
21:51 sizz: I'm having trouble understanding exactly how the following works:  http://paste.lisp.org/display/131211
21:51 sizz: specifically, the nested lambdas and 'seq'
21:52 sizz: the book doesn't really explain it .. does anyone know of an online resource that would help me?
22:08 wtetzner: sizz: insert-g is a function that creates an insert function
22:09 wtetzner: it takes an argument seq, which knows how to insert a value once you've found the old value
22:09 wtetzner: so you can build different insert functions by calling insert-g with different values for seq
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22:11 sizz: wtetzner: but i only pass three arguments to insert-g via either insertL2 or insertR2 .. don't they go into 'new' 'old' and 'list'?
22:11 sizz: where does seq come from?
22:12 wtetzner: sizz: `seq' is the argument to insert-g, while `new', `old', and `list' are the arguments to the function insert-g returns
22:14 wtetzner: so for example, to define insertL2
22:15 wtetzner: you pass a function (seq) to insert-g, and insert-g gives you back a new function
22:15 wtetzner: that takes 'new', 'old', and 'list' as arguments
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22:19 wtetzner: sizz: does that make sense?
22:22 sizz: so 'seq' is kind of a placeholder for the last line of insertL2 ... the function that's passed in (cons old(cons new list)) each time insertL2 is called, whereas 'new' 'old' and 'list' are the specific arguments passed in?
22:22 wtetzner: yeah
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22:23 wtetzner: but (cons old (cons new list)) isn't passed in each time insertL2 is call
22:23 wtetzner: called*
22:23 wtetzner: it's only passed in once
22:23 wtetzner: when insertL2 is defined
22:24 wtetzner: insertL2 is defined to be the result of calling insert-g on (lambda (new old list) (cons new (cons old list)))
22:25 wtetzner: the inner lambda in the definition of insert-g 'closes over' seq
22:26 wtetzner: so when it gets returned from (lambda (seq) ...), it can still access seq
22:28 sizz: okay, thanks. I think it makes sense now!
22:28 sizz: I didn't see anything about this in the Guide, so your help is appreciated
22:28 wtetzner: sure
22:28 wtetzner: it takes a little while to get used to working with higher order functions
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22:59 neilv: now to find out whether learning jmeter is faster than writing a specialized program in racket
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