Re: [racket-dev] toward a new Racket macro expander

2015-02-26 Thread David Vanderson
On 02/26/2015 12:26 PM, Matthew Flatt wrote: I've been working on a new macro expander for Racket, and I'm starting to think that it will work. The new expander is not completely compatible with the current expander --- and that will be an issue if we eventually go forward with the change ---

[racket-dev] gui responsiveness

2014-04-16 Thread David Vanderson
(moved to dev) On Linux, the attached program shows terrible responsiveness when dragging points around on the graph. Can anyone else on Linux reproduce this behavior? The patch below dramatically improves the responsiveness by forcing the eventspace to process medium-level events (mouse

Re: [racket-dev] gui responsiveness

2014-04-16 Thread David Vanderson
priority where `needed?` is a field that's initially #f. At Wed, 16 Apr 2014 13:33:02 -0400, David Vanderson wrote: (moved to dev) On Linux, the attached program shows terrible responsiveness when dragging points around on the graph. Can anyone else on Linux reproduce this behavior? The patch

Re: [racket-dev] draw-text always pixel aligned?

2013-12-17 Thread David Vanderson
translate 50 0))) (define frame (new frame% (label Test draw-text))) (define canvas (new canvas% (parent frame) (min-width 500) (min-height 100) (paint-callback draw-screen))) (send frame show #t) On 12/16/2013 02:16 PM, David Vanderson wrote: Thank you - I'll

Re: [racket-dev] draw-text always pixel aligned?

2013-12-16 Thread David Vanderson
mean to pass 'unaligned instead of 'aligned as the last argument to `find-or-create-font`? That should disable pixel alignment. At Mon, 16 Dec 2013 01:28:23 -0500, David Vanderson wrote: Hello, It seems that draw-text always pixel-aligns its text. In the example below, I draw a black hello on top

Re: [racket-dev] draw-text always pixel aligned?

2013-12-16 Thread David Vanderson
by 0.1, and I don't see any options that would affect vertical alignment. At Mon, 16 Dec 2013 10:37:39 -0500, David Vanderson wrote: That makes sense, but the picture with 'unaligned seems strange (attached). It looks like each individual character is being pixel aligned, and also the vertical

[racket-dev] draw-text always pixel aligned?

2013-12-15 Thread David Vanderson
Hello, It seems that draw-text always pixel-aligns its text. In the example below, I draw a black hello on top of a red one, with a pixel offset of 0, 0.1, 0.2, . . . 0.9. At least for me, I see no change until 0.5, where the black text jumps a whole pixel (see attached image). Am I missing

Re: [racket-dev] draw-text sensitive to scale when first called

2013-12-07 Thread David Vanderson
Amazing - thank you! On 12/06/2013 01:17 PM, Matthew Flatt wrote: I've pushed a repair. Thanks for the report! At Thu, 05 Dec 2013 16:08:45 -0500, David Vanderson wrote: Hello, I'm seeing that if the first draw-text on a canvas is at a small scale (0.1), then later draw-text calls at larger

[racket-dev] draw-text sensitive to scale when first called

2013-12-05 Thread David Vanderson
Hello, I'm seeing that if the first draw-text on a canvas is at a small scale (0.1), then later draw-text calls at larger scales (1) show strange character spacing (see attached image). This can be worked around by passing #t as the combine? argument to draw-text, but it seems some state is

Re: [racket-dev] Racket Guide chapter on concurrency

2013-10-07 Thread David Vanderson
This is fantastic! Thank you! I learned a good deal reading it just now. Comments below: On 10/06/2013 04:30 PM, David T. Pierson wrote: 1) Should it be broken into separate pages? I'd leave it as a single page for now. Easier to update. 2) It starts out with the basics of threads. Is

Re: [racket-dev] call-with-limits memory bound isn't actually bounding memory usage

2013-09-09 Thread David Vanderson
. Without having to modify too much code, would the proper way to call a function entirely within the sandbox be to use dynamic-require in the thunk, rather than require in the module using call-with-limits? -Ian - Original Message - From: David Vanderson david.vander...@gmail.com To: J

Re: [racket-dev] call-with-limits memory bound isn't actually bounding memory usage

2013-09-09 Thread David Vanderson
Just to make sure, is the memory being allocated reachable from outside the sandbox? http://www.cs.utah.edu/plt/publications/ismm04-addendum.txt On 09/09/2013 01:29 PM, J. Ian Johnson wrote: I don't use the gui framework at all. This is all just pounding on global hash-tables and vectors. Or

Re: [racket-dev] tests not being run?

2013-09-06 Thread David Vanderson
McCarthy wrote: On Wed, Sep 4, 2013 at 1:55 PM, David Vanderson david.vander...@gmail.com mailto:david.vander...@gmail.com wrote: I totally missed pkgs/racket-pkgs/racket-test/tests/run-automated-tests.rkt, but it looks like DrDr is running that with 'mzc -k _' - doesn't that just

Re: [racket-dev] hex decoding?

2013-09-04 Thread David Vanderson
place. Thanks! Robby On Tue, Jun 11, 2013 at 3:26 PM, David Vanderson david.vander...@gmail.com mailto:david.vander...@gmail.com wrote: Thank you Stephen and Tony for your examples. I found the following private function in db/private/mysql/connection.rkt: (define (hex-string

[racket-dev] tests not being run?

2013-09-04 Thread David Vanderson
It looks to me like most of the tests in racket/pkgs/racket-pkgs/racket-test/tests/file/* are not being run by DrDr. I think DrDr is running them with 'raco test _' while the files mostly need to be run as 'racket _'. Am I missing something? If not, should I fix the files to be run with

Re: [racket-dev] tests not being run?

2013-09-04 Thread David Vanderson
. Does DrDr automatically run a main.rkt file if it's present? Thanks, Dave On 09/04/2013 01:58 PM, Robby Findler wrote: I think it makes more sense to change those 'main' modules into 'test' modules, but I'm not positive. Robby On Wed, Sep 4, 2013 at 12:26 PM, David Vanderson david.vander

Re: [racket-dev] ready for the package switch?

2013-06-18 Thread David Vanderson
On 06/18/2013 12:47 PM, Matthew Flatt wrote: 2. Reply to the list to say that it works and we should merge it. I got the below 4 similar errors. DrRacket works. Linux Mint 14 (Linux funland 3.5.0-17-generic #28-Ubuntu SMP Tue Oct 9 19:31:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux). Let me

Re: [racket-dev] hex decoding?

2013-06-11 Thread David Vanderson
Thank you Stephen and Tony for your examples. I found the following private function in db/private/mysql/connection.rkt: (define (hex-string-bytes s) (define (hex-digit-int c) (let ([c (char-integer c)]) (cond [(= (char-integer #\0) c (char-integer #\9)) (- c

Re: [racket-dev] hex decoding?

2013-06-11 Thread David Vanderson
On 06/11/2013 04:33 PM, Matthias Felleisen wrote: db/private/mysql/connection.rkt does not export the function, otherwise you could. I don't understand this. I'd like to make the function available to users somewhere - are you saying that's bad? On Jun 11, 2013, at 4:26 PM, David

[racket-dev] hex decoding?

2013-06-09 Thread David Vanderson
I'm doing some cryptography exercises that involve a lot of hex encoding/decoding. I see there's a bytes-hex-string function in file/sha1 and openssl/sha1, but I can't find a decode function. Is a hex decode function in the distribution? Thanks, Dave _ Racket

Re: [racket-dev] URL escaping: question for web experts

2012-12-17 Thread David Vanderson
No guru here, but my experience has been that every url encoder is slightly different - I don't think there's a broad consensus on edge cases. I'd say go for it. On 12/17/2012 06:59 AM, Eli Barzilay wrote: For many people there is a constant source of annoyance when you copy+paste doc URLs

Re: [racket-dev] planet2 and versions

2012-12-12 Thread David Vanderson
I was professionally writing Ruby code as that community struggled through package issues. I hope that experience can shed some light here. Also I'd like to understand the basic use cases and how they work in planet2. As a user, here are my 2 use cases: 1. My friend tells me about awesome

[racket-dev] tiny doc bug?

2012-12-01 Thread David Vanderson
http://docs.racket-lang.org/data/Orders_and_Ordered_Dictionaries.html Towards the bottom of this page there is the following error: (datum-order (make-fish 'alewife) (make-fish 'sockeye)) make-fish: undefined; cannot reference undefined identifier Is this intentional? Thanks, Dave

Re: [racket-dev] `racket/string' extensions

2012-04-19 Thread David Vanderson
Thank you so much for this. This was definitely one area of difficulty when I started using Racket for scripting. On 04/19/2012 09:28 AM, Eli Barzilay wrote: But to allow other uses, make these arguments a string *or* a regexp, where a regexp is taken as-is. This leads to another simplicity

Re: [racket-dev] [PATCH] add in-slice sequence

2011-12-15 Thread David Vanderson
)) (for/list ([s (in-slice 3 products)]) `(ul ,@(for/list ([e s]) `(li ,e Thanks, Dave On 12/09/2011 02:46 AM, David Vanderson wrote: Hello, I was trying to write some code to process a few items at a time from a list. Nothing I came up with looked great, so I wrote an in-slice

[racket-dev] doc bug - syntax-id-rules

2011-12-08 Thread David Vanderson
I think the docs for syntax-id-rules have 2 lines swapped. Here's a patch: diff --git a/collects/scribblings/reference/stx-patterns.scrbl b/collects/scribblings/reference/stx-patterns.scrbl index 83d13bc..209961b 100644 --- a/collects/scribblings/reference/stx-patterns.scrbl +++

[racket-dev] [PATCH] add in-slice sequence

2011-12-08 Thread David Vanderson
Hello, I was trying to write some code to process a few items at a time from a list. Nothing I came up with looked great, so I wrote an in-slice sequence function: (for/list ([e (in-slice 3 (in-range 8))]) e) '((0 1 2) (3 4 5) (6 7)) Patch below. Comments? Thanks, Dave diff --git

[racket-dev] failed bug report

2011-06-01 Thread David Vanderson
Thanks for Racket! I tried to send a bug report via drracket, but got this error: An error occurred when submitting your Racket bug report. Please enter the correct text at the bottom of the bug form. If this problem persists, please send email to the Racket mailing list, or to

Re: [racket-dev] racket vs. scheme vs. clojure (as it appears to others)

2011-04-29 Thread David Vanderson
What's the benefit of using regexp-match instead of port-string ? Thanks, Dave On 04/29/2011 07:23 AM, John Clements wrote: This is just one random guy, but it's interesting to see how Racket is perceived. Excerpts from a conversation on stackoverflow about Racket: Thanks. And

[racket-dev] weak boxes in a script

2011-03-16 Thread David Vanderson
I'm seeing a difference between when the value in a weak box is collected. When I run the following interactively, the value is collected like I expect. But it is not collected when running in a script, or in DrRacket. This is v5.1 on Ubuntu x64, compiled from source. Can someone explain

Re: [racket-dev] weak boxes in a script

2011-03-16 Thread David Vanderson
16, 2011 at 5:09 PM, David Vanderson david.vander...@gmail.com wrote: I'm seeing a difference between when the value in a weak box is collected. When I run the following interactively, the value is collected like I expect. But it is not collected when running in a script, or in DrRacket