I have a student who hasn't succeeded in running compiled-from-source DrRacket
on 64-bit ubuntu. Specifically, he claims it dumps core with
SIGSEGV MAPERR si_code 1 fault on addr 0x4
Aborted
on startup. I have *not* tried to verify this myself, so he's almost certainly
made a minor
A couple of weeks ago, you showed me the trick that rackunit uses to allow
single-instantiation of a modules. I'm now trying to do this
for a planet package, and it looks like I have to change the required module
from being a relative to being an absolute path. That is:
(require (prefix-in
On Sep 28, 2010, at 8:23 AM, Eli Barzilay wrote:
Can we please not have this?? The whole point of having uniform names
is that you can use require/provide things easily so there's no need
for a library.
Sure, I don't feel strongly about it. Done.
To be clear, my use case is this: I'm
On Sep 28, 2010, at 10:09 AM, Eli Barzilay wrote:
An hour ago, John Clements wrote:
On Sep 28, 2010, at 8:23 AM, Eli Barzilay wrote:
Can we please not have this?? The whole point of having uniform names
is that you can use require/provide things easily so there's no need
for a library
I want to read a chunk from the middle of a 50-megabyte file. As far as I can
see, there are no random-access file primitives currently in DrRacket. Also, I
don't see a skip-bytes, so it looks like I should be allocating a junk buffer
and then repeatedly calling read-bytes to read the skipped
I'm sure I'm just missing something obvious here, but is there a library that
provides things like unsafe-vector-length that are actually references to the
safe versions? I have a core dump occurring in (someone else's) unsafe code,
and I'd much rather just import a different library than go
On Sep 27, 2010, at 3:45 PM, Robby Findler wrote:
How about prefix-in with unsafe- as the prefix?
You still have to specify the right set of functions, right? But yes, that's
all I'm thinking of.
John
smime.p7s
Description: S/MIME cryptographic signature
I accidentally opened a sound file in DrRacket today; cue six minutes of
thrashing and computer unhappiness. Would it be okay if I added a second-check
dialog to DrRacket that checked the size of a file before opening it, and asked
for confirmation before opening files larger than, say, 5MB?
The function u8vector-cpointer is documented, but doesn't exist; this is
presumably because the u8vector functions are actually byte-string functions,
but it's not clear to me whether the absence of u8vector-cpointer is an
oversight or whether it would violate abstractions in bad ways and hence
in order
to expect reasonable performance.
Sounds good to me: go for it!
John Clements
smime.p7s
Description: S/MIME cryptographic signature
_
For list-related administrative tasks:
http://lists.racket-lang.org/listinfo/dev
I'm trying to add together big buffers. The following code creates two big fat
buffers of 16-bit integers, and adds them together destructively. It looks to
me like this code *could* run really fast, but it doesn't; this takes about 8.5
seconds. Changing + to unsafe-fx+ has no detectable
On Sep 23, 2010, at 8:16 PM, Matthew Flatt wrote:
One more thought: Do you get to pick whether you use 16-bit integers or
64-bit floating-point numbers? The `flvector-' and `f64vector-'
operations are inlined by the JIT and recognized for unboxing, so using
flonum vectors and operations
On Sep 23, 2010, at 9:46 PM, John Clements wrote:
On Sep 23, 2010, at 8:16 PM, Matthew Flatt wrote:
One more thought: Do you get to pick whether you use 16-bit integers or
64-bit floating-point numbers? The `flvector-' and `f64vector-'
operations are inlined by the JIT and recognized
=[ 1 Commits ]==
Directory summary:
100.0% collects/test-engine/
~~
a095ebc John Clements cleme...@racket-lang.org 2010-09-17 10:18
:
| added format arg to printf to avoid corner-case printf bugs, rackety changes
:
M collects
On Sep 17, 2010, at 11:03 AM, Sam Tobin-Hochstadt wrote:
On Fri, Sep 17, 2010 at 1:36 PM, John Clements
cleme...@brinckerhoff.org wrote:
Oof... it looks like doing a rename plus a few changes pretty effectively
hides those changes, though I can dig them out with 'git annotate'. Do we
Seems like a FAQ, but:
I want to associate a single sound player with a drscheme process. When
student code runs, it needs to send messages to that sound player. I want to
make sure there's only one running at a time.
The first thing that pops into my head is some kind of shared-require
On Sep 10, 2010, at 8:17 PM, Eli Barzilay wrote:
On Sep 10, Robby Findler wrote:
FWIW, this is one path that tools can use to circumvent DrRacket's
property (well, the property we work towards anyways) that no program
can cause DrRacket itself to crash or freeze. So if you do provide
things
On Sep 7, 2010, at 6:56 AM, mlsm...@cs.vassar.edu wrote:
A new problem report is waiting at
http://bugs.racket-lang.org/query/?cmd=viewpr=11166
Reported by Marc Smith for release: 5.0.1
*** Description:
When stepping through a program in BSL, the stepper shows current progress,
e.g.,
I'm writing code for beginners that produces sound values. I'd like to
render these values as snips that have a start and a stop button.
My first experiment looked like this:
#lang racket
(require racket/gui)
(define f (make-object image-snip%
Match is fantastic, and sometimes you want finer control over the error
messages. This morning I whipped up a match/fail* macro, which successively
matches against a sequence of patterns, and allows you to specify a separate
fail message for each layer.
It's a simple macro, and I give a use of
On Sep 1, 2010, at 1:55 PM, John Clements wrote:
I'm trying to run 'make install' on a Linux VPS, and it's halting -- at
different points -- with errors that look like this:
...
raco setup: made: framework
raco setup: made: browser/private
raco setup: made: framework/private
raco setup
Is DrDr down? The latest build I see on drdr.racket-lang.org is from
2010-08-25.
Apologies if I missed an announcement.
John
smime.p7s
Description: S/MIME cryptographic signature
_
For list-related administrative tasks:
On Aug 26, 2010, at 2:51 PM, Eli Barzilay wrote:
On Aug 17, Eli Barzilay wrote:
So now I have these counts:
http://tmp.barzilay.org/r1.png 4
http://tmp.barzilay.org/r3.png 1
http://tmp.barzilay.org/r4.png 2
Update on this: the first version (r1 above) was by far the most
On Aug 26, 2010, at 10:59 AM, Shriram Krishnamurthi wrote:
Got it. Thanks for all the inputs and for the great suggestion!
A couple of comments:
1) I could very well be mis-stating his position, but I think that Guillaume
felt quite strongly that the reductions should occur in the
On Aug 26, 2010, at 5:23 PM, Shriram Krishnamurthi wrote:
I know Guillaume proposed to do it in the context of the editor. I'm
unconvinced that that's the right way to go. At any rate, integrating
into an existing bit of infrastructure (def'ns or inter's) is going to
be much more complex
On Aug 17, 2010, at 4:27 PM, Jay McCarthy wrote:
On Tue, Aug 17, 2010 at 2:24 PM, John Clements
cleme...@brinckerhoff.org wrote:
On Aug 17, 2010, at 3:57 PM, Jay McCarthy wrote:
We're attempting to write down coding guidelines for the project.
Here is a first attempt:
http
On Aug 17, 2010, at 3:57 PM, Jay McCarthy wrote:
We're attempting to write down coding guidelines for the project.
Here is a first attempt:
http://faculty.cs.byu.edu/~jay/tmp/201008161509-guidelines.html
and that you and your readers will so in the future
Will so? Should that have been
I happened upon the Racket wikipedia page again, and yet again the Hello
World section made me want to cry. So I deleted it, and replaced it with the
straightforward version of racket's Hello, World! program, viz.:
#lang racket
Hello, World!
...then I added the sierpinski example from the
Reality check: I can't use the Racket ffi libraries to load 64-bit x86_64
shared libs, can I?
John
smime.p7s
Description: S/MIME cryptographic signature
_
For list-related administrative tasks:
http://lists.racket-lang.org/listinfo/dev
On Jul 30, 2010, at 6:47 AM, Robby Findler wrote:
On Fri, Jul 30, 2010 at 4:05 AM, Eli Barzilay e...@barzilay.org wrote:
IMO, this thing is missing the point (the usual parens, ewww! one),
as long as it ignores infix.
Seems to me that this point directly contradicts one of Shriram's
On this page
http://pre.racket-lang.org/release/installers/
the reported size of the Windows installer is 29M, vs. about 47 or 48 M for
other platforms. I see that this was true of the 5.0 release as well, so this
is probably expected, but I'm curious: why is this? Is it just that the other
Is there some good reason why the 'document' and 'prolog' structures in the xml
library are not transparent? In the just trying to see what's there stage of
programming, it would be a lot simpler not to have to dig through them with
explicit accessors.
John
smime.p7s
Description: S/MIME
On Jun 9, 2010, at 5:05 AM, Sam Tobin-Hochstadt wrote:
On Tue, Jun 8, 2010 at 11:27 PM, Eric Tanter etan...@dcc.uchile.cl wrote:
Yes, Carl got my point right. And yes, that's like showing square brackets
in the stepper ;)
Right now, the two cases are slightly asymmetric, since there's a
I've taken a first crack at creating a
Racket (programming language)
page in wikipedia, simply by copying the first few chunks of the PLT Scheme
page.
This is a bit experimental, because it may be that Wikipedia has an existing
mechanism for renaming, so I figured I'd just spend five minutes
301 - 334 of 334 matches
Mail list logo
