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00:48 dsrguru: does a style guide or naming convention exist for racket?
00:50 dsrguru: and what's the difference between hyphens and slashes in the names of identifiers?
01:01 DT``: dsrguru, the slash usually means `with', some kind of ``combination'', or a modifier, i.e., call/cc -> call-*with*-current-continuation, define/contract -> defines and and attaches a contract, bytes->string/utf-8 and bytes->string/locale, where /utf-8 and /locale are the modifiers.
01:02 DT``: you can read the hyphens as spaces.
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01:36 dsrguru: DT``: thanks
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01:39 racket: [racket] plt pushed 1 new commit to release: http://bit.ly/pjd2TQ
01:39 racket: [racket/release] Alpha version number for the v5.1.2 release - Ryan Culpepper
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03:50 racket: [racket] plt pushed 1 new commit to master: http://bit.ly/pHncm8
03:50 racket: [racket/master] New Racket version 5.1.2.1. - Eli Barzilay
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10:56 ApeShot: So I'm considering doing some modeling in Racket, and I'm curious about some aspects of the memory management system
10:57 ApeShot: In particular, if I create and release a lot of arrays of the same size, will the system re-use them under the hood or will I pay a big penalty for all that consing?
10:58 ApeShot: The typical use case here is an array with N elements representing the state of a system (might be hundreds, thousands) which I create one of each iteration, and the other of which falls out of scope
10:59 ApeShot: My hope would be that the "garbage collected" array would just be re-used next iteration when I act to allocate another
11:00 stamourv: ApeShot: I'm not sure.
11:01 stamourv: But for arrays, you're probably better off using vectors, no consing.
11:01 ApeShot: I meant consing informally
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11:01 ApeShot: I would use vectors
11:01 stamourv: (Unless by `consing', you mean any allocation at all.)
11:01 stamourv: Oh, ok.
11:01 ApeShot: Another issue is that the standard vector constructors probably zero out the memory
11:01 ApeShot: Which is not needed in this use case
11:02 ApeShot: I'm probably over-designing
11:04 stamourv: Well, I would start by using plain vectors and no trickery, and then profile if it's too slow.
11:05 stamourv: If it is indeed too slow, there's probably something you could do with ffi/cvector.
11:09 ApeShot: Probably won't be too slow, honestly, these are very simple neuron models
11:09 ApeShot: And I'm using scheme because writing in C might take longer than the modeling
11:09 ApeShot: Also, I guess I'm just trying to enjoy the freedom of post-grad-school life, where I can use whatever language I want to do research
11:10 ApeShot: Does anyone know of a system already in use to build and represent coupled differential equations for Scheme?
11:10 ApeShot: That is kind of what I am building first
11:10 ApeShot: Something that takes a high level description and converts it into a low level one for modeling
11:11 stamourv: I don't know of one, but Brad Lucier at Purdue does a lot of numerical analysis in Scheme (Gambit, specifically), so he may have something.
11:15 ApeShot: Thanks for the tip
11:15 stamourv: No problem.
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16:23 racket: [racket] plt pushed 7 new commits to master: http://bit.ly/qUwf2t
16:23 racket: [racket/master] improve decompiler handling of syntax object - Matthew Flatt
16:23 racket: [racket/master] optimizer repair; `unsafe-c{a,d}r' can be dropped - Matthew Flatt
16:23 racket: [racket/master] add `unsafe-list-{ref,set}' - Matthew Flatt
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16:52 racket: [racket] plt pushed 1 new commit to master: http://bit.ly/qAqp8n
16:52 racket: [racket/master] completed the planet library documentation and, in the process, - Robby Findler
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17:51 racket: [racket] plt pushed 2 new commits to master: http://bit.ly/pw7q1M
17:51 racket: [racket/master] removed merge conflict artifact - Ryan Culpepper
17:51 racket: [racket/master] syntax/parse: add expr/c to main module - Ryan Culpepper
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18:25 racket: [racket] plt pushed 3 new commits to master: http://bit.ly/pvYmXl
18:25 racket: [racket/master] Catches another way images prints. - Guillaume Marceau
18:25 racket: [racket/master] Little tweaks to the *SL documentation - Guillaume Marceau
18:25 racket: [racket/master] Merged htdp-lib.scblr and teachpacks/error-composition.scrbl into htdp/htdp.scrbl, - Guillaume Marceau
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18:49 racket: [racket] plt pushed 1 new commit to master: http://bit.ly/ogCUjo
18:49 racket: [racket/master] Adding files missing in the previous commit. - Guillaume Marceau
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19:25 dsrguru: what's the difference between using define or define-values directly inside a procedure and using them inside local?
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19:29 jonrafkind: im not sure but im guessing very little
19:33 bugQ: things with -values are just for handling things with multiple return values
19:35 bugQ: oh I see, that wasn't the duality
19:35 jonrafkind: :p
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20:20 dsrguru: jonrafkind: sorry for the late reply.  So do you think local is pretty useless then?
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20:20 jonrafkind: yea, i never use it
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