and Texinfo (perhaps via
STexi (Texinfo as S-expressions)?).
Marijn
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On 05-02-13 09:58, Marijn wrote:
On 01-02-13 19:34, Matthew Flatt wrote:
At Fri, 01 Feb 2013 15:09:31 +0100, Marijn wrote:
On 01-02-13 05:20, Eli Barzilay wrote:
Racket version 5.3.2 is now available from
http://racket-lang.org
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On 01-02-13 19:34, Matthew Flatt wrote:
At Fri, 01 Feb 2013 15:09:31 +0100, Marijn wrote:
On 01-02-13 05:20, Eli Barzilay wrote:
Racket version 5.3.2 is now available from
http://racket-lang.org/
* Documentation cross-reference information
to do this by using real promises
(streams, lazy lists).
I hope that helps and good luck,
Marijn
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3
installed. Or
SQLite is actually only needed for using the docs and not for building
them.
Marijn
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it by a factor of 5 or even slightly over 6 when tuning, so it seems
to me Racket would still be slower by 10x.
Marijn
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versions of Ubuntu.
Hi Laurent,
this bug was fixed January 2012 AFAIK (look for .1 evaluates to
0.0). Are you still using an older version?
Marijn
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, but this one is probably no big
deal and is probably not related to the behavior Neil sees.
Unfortunately I (like Robby) cannot reproduce that one.
Marijn
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of the struct.
Marijn
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wasn't using Windows. I looked in the openssl bindings and
the racket documentation but didn't find anything.
If it doesn't exist, which of a pull request or a planet package
is more appropriate?
I think srfi 27[1] provides what you're looking for.
Marijn
[1]:http://srfi.schemers.org/srfi-27
the Vanimal animal member might be. Further, (no article
here!) `Vc(h)at' is not a(!) Vc(h)at (whichever way you typo-correct).
Marijn
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MzScheme
372, so no Racket there.
Marijn
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my head :(. In what way is this
solution impossible without it? I mean FSMs can be implemented without
it (and not just in the theoretical Turing-complete tarpit way).
Marijn
#lang racket
;Finite State Machine of arbitrary size using composable control
(require racket/control rackunit
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On 13-03-12 17:34, Matthias Felleisen wrote:
On Mar 13, 2012, at 12:05 PM, Marijn wrote:
(define (sum-hash-of-vectors3 table keys size) (apply vector-map
+ (for/list ((k keys)) (hash-ref table k
Aren't the last two lines just
(hash
!
v i
(+ (vector-ref v i)
(vector-ref v_k i))
v)
This was quite a surprise and is due to (my guess) the quality of the
compiler?
Marijn
(*) I believe this is also the reason I chose to lay the data out this
way and not as a vector of hashes, so
))
(perfect-square? (- x z))) (return (list x y z sum)) (next-z (add1
z))
Marijn
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On 06-03-12 14:23, Marijn wrote:
(define (fa) (let ((squares (for/vector ((i (in-range 1 1)))
(* i i (let/ec return (let next-sum ((sum 3)) (let ((limit-z
(quotient sum 3))) (let next-z ((z 1)) (if (= z limit-z)
(next-sum (add1 sum
explanation is why racket uses phases in the first
place, given that other systems (I believe Larceny is the prime
example) have implemented a phase-less or phase-inferring macro system.
Marijn
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function
which might have to become a little smarter, but there will be less
code overall and the code that is there will be easier to understand.
Met vriendelijke groeten,
Marijn
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to be proposing something close to implicit renaming macros
IIUC and name Nemerle as their chief inspiration (which proudly claims
on its homepage that it supports macros, but, unlike Lisps, without
throwing away all that wonderful syntax).
Marijn
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rackety way to go about that kind of
thing?
You can hide the internals of your data strucutre in a module and only
expose (provide) those functions/things that are part of the public
interface.
Marijn
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Copying the list.
- Original Message
Subject: Re: [racket] DrRacket problems, please help (I need it for
homework)!
Date: Tue, 7 Feb 2012 19:07:42 + (UTC)
From: enzimmer...@frontier.com
To: Marijn hk...@gentoo.org
Racket
transformer is bound) in: #%require
But when same program is run in console , it works just fine .
Other programs that does not require this program , works just fine
in drracket.
Any idea how to resolve this.
Without a test case it might be hard to help you,
Marijn
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anything
before this happened?
Marijn
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. This
seems to works well so far in practice. I make input widgets call it
automatically when they change value and just discovered that I should
also call it on-super-window-show when I change tab, unless I change
my input widgets from calling this on their own tab to the root frame.
Marijn
-aligned under certain edits. For example if I have a text-field
with an initial value of 0 and replace that 0 by anything else it gets
left-aligned.
Marijn
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On 31-01-12 01:19, Doug Williams wrote:
I have a table-panel% class on PLaneT - table-panel.plt.
Thanks Doug, that works wonderfully well for me,
Marijn
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' whenever you're REdefining something.
Marijn
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On 31-01-12 05:57, Erik Dominikus wrote:
Only 3 hours from report to fix.　That's quite impressive. :-D
@Marijn: I forgot... my platform is Ubuntu 10.04 Linux 2.6.32-38
x86_64. Still learning to write bug reports I guess. :-|
You're doing fine
?) option?
Marijn
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Hi,
I was wondering if anyone had already written code for a panel% that
lays out its elements in a grid similar to how a html table's elements
are laid out.
Marijn
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Which way would you go if you were creating this user interface?
Thanks for your thoughts,
Marijn
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On 17-01-12 16:14, Sam Tobin-Hochstadt wrote:
On Tue, Jan 17, 2012 at 4:06 AM, Marijn hk...@gentoo.org wrote:
On 16-01-12 15:28, Sam Tobin-Hochstadt wrote:
On Mon, Jan 16, 2012 at 7:57 AM, Marijn hk...@gentoo.org
wrote:
((_ ((id rule
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On 18-01-12 11:36, Veer Singh wrote:
This seems to work (blind hack),
Unfortunately it doesn't work:
_: wildcard not allowed as an expression in: (_ ((id:id expr:expr ...)
...))
in line 3 of the following:
(define-syntax (depgraph stx)
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On 18-01-12 13:05, Veer Singh wrote:
Add
(require (for-syntax syntax/parse))
Right, so after adding (require (for-syntax syntax/parse
syntax/free-vars)) it works,
Marijn
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On 18-01-12 13:30, Marijn wrote:
On 18-01-12 13:05, Veer Singh wrote:
Add
(require (for-syntax syntax/parse))
Right, so after adding (require (for-syntax syntax/parse
syntax/free-vars)) it works,
Marijn
So after rewriting for syntax-case
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On 16-01-12 15:28, Sam Tobin-Hochstadt wrote:
On Mon, Jan 16, 2012 at 7:57 AM, Marijn hk...@gentoo.org wrote:
((_ ((id rule) ...)) (with-syntax (((dep ...) (free-vars (expand
#'(rule ...)
You need to use `local-expand', not `expand', here
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On 13-01-12 16:32, Matthias Felleisen wrote:
On Jan 13, 2012, at 10:20 AM, Marijn wrote:
Right, b would be a constant, namely the function that returns
the value of a.
a is assignable so b is constant only between 'set! messages
Having
...) (free-vars (expand #'(rule ...)
#`((id . dep) ...)) )))
(define simple-arith
(depgraph
((a #f)
(b (* 3 a))
(c (+ 5 a b))
(d (let ((a 9)) (- c a))) )))
simple-arith
to work, but expand complains about the unbound a in the rule for b.
Marijn
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-class1% (size 2) (weight 200)))
(send fast1 get-size)
(send fast1 get-weight)
Thanks again,
You're welcome,
Marijn
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On 13-01-12 11:37, Marijn wrote:
(define-syntax fast-class (lambda (stx) (syntax-case stx () ((_
_field_ ...) (with-syntax (((_getter_ ...) (datum-syntax #f (map
(lambda (f) (string-symbol (string-append get- (symbol-string
f (syntax-datum
be converted from syntax to a plain value for
further processing which I know how to do.
Marijn
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On 13-01-12 15:23, Matthias Felleisen wrote:
On Jan 13, 2012, at 8:40 AM, Marijn wrote:
My question is how one determines the dependencies from the above
code. The result for the above would be something like:
((a) (b a) (c a b) (d c
_field_)
(define/public (_getter_) _field_)
(define fast-class2% (fast-class2 size get-size))
(define fast2 (new fast-class2% (size 3)))
(send fast2 get-size)
Hope that helps,
Marijn
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On 29-12-11 10:02, Marijn wrote:
What I found was that it is much slower to treat a string as a
port and then read-char from that then it is to directly index
the string.
That string input ports are often noticeably slower than string
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On 05-01-12 12:03, Marijn wrote:
On 04-01-12 16:55, Matthias Felleisen wrote:
On Jan 4, 2012, at 10:40 AM, Marijn wrote:
Basically, my idea was to transform:
(dependent-boxes ((a) (b (* 2 a)) (c (+ 2 a b
into something which would
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On 04-01-12 22:50, Eli Barzilay wrote:
11 hours ago, Marijn wrote:
It took me a while to understand what you're saying here, but if
I am not mistaken you're saying that the result of the
macro-expansion is a function-application with `let
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On 04-01-12 16:55, Matthias Felleisen wrote:
On Jan 4, 2012, at 10:40 AM, Marijn wrote:
Basically, my idea was to transform:
(dependent-boxes ((a) (b (* 2 a)) (c (+ 2 a b
into something which would automatically propagate changes
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On 03-01-12 20:15, Eli Barzilay wrote:
Two hours ago, Marijn wrote:
Hi,
for/hash is giving me a syntax-error, but the error is in
macro-expanded code which is not shown by default and which is
also seemingly inaccessible via the macro-stepper
expenses y 0) )))
The error:
$ racket test-for.rkt
test-for.rkt:12:6: for/hash: bad syntax in: for/hash
=== context ===
standard-module-name-resolver
Some help would be appreciated.
Marijn
#lang racket
(provide dependent-boxes agraph-topological-sort agraph-outnodes)
;for splicing-let
(require
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On 28-12-11 19:27, Neil Van Dyke wrote:
Marijn wrote at 12/28/2011 12:00 PM:
I don't think my use of this code is very performance, but I
couldn't help myself, so I looked into making it faster
This is the best spirit. :)
What I found
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On 27-12-11 18:59, Sam Phillips wrote:
On Tue, Dec 27, 2011 at 09:55, Marijn hk...@gentoo.org wrote:
Sometimes I wish for python-like string-strip to be a standard
function. For example when I want to parse a list of numbers from
a text-field, I
on whitespace, map
string-number over it and check the result with `every'.
Is there a better way? If not then perhaps some form of string-strip
could be added (perhaps under regexp-strip name?) since it isn't
exactly extremely simple unless you're a regexp wizard.
Marijn
Some code (ter leering ende
did, nice work! I'll have to study the source later to see how you
did it.
Marijn
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Hi,
are there any docs that describe how to use the framework to build a
simple application or some example source that defines such an
application?
Marijn
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) (swap x y)).
That first f is a function that swaps its local arguments with no
change to the outside world, while the second f is a macro (IIUC) that
mutates its real (for lack of a better term (on my part)) arguments,
through the macro magic of define-cbr.
Marijn
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very few function definitions
that support your in-circle?.
Hope that helps,
Marijn
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On 30-11-11 14:33, Marijn wrote:
Hi,
I'm trying to use the parser-tools to parse the startup info for
the Google AI Challenge, but I am not sure what I'm doing wrong.
I managed to get my code working, see below. (BTW parser gives a
really silly
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Hi Timothy,
On 30-11-11 15:14, Timothy Nelson wrote:
Hi Marijn,
Two quick points:
(1) The parser works with token structs, not symbols. Whenever you
declare a token, a cooresponding token-name form is made
available to you when using lexer
happen because otherwise hills would get blocked from spawning
periodically and an ant would have to come and eat the food to clear
the hill. But you can ask in the forum. My searches so far have not
turned up anything.
Marijn
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Comment
if its
googlerank increased a lot during the last 12 hours, because I'd swear
I didn't find it yesterday... It looks like a much more complete
starting point.
Marijn
[1]:https://github.com/wfi/RacketStarter
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-liner ;) )
Laurent
I just tried this fragment on my current git checkout and got:
inexact-exact: no exact representation for +nan.0
this is on a x86-64 GNU/Linux box
Marijn
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On 10/18/11 01:39, Matthew Flatt wrote:
At Mon, 17 Oct 2011 16:33:26 +0200, Marijn wrote:
Is it correct, that when you click the title bar of a window
frame to select it, this causes the on-focus method of that frame
to be called.
That's
.
Thanks for the clarification. I have been able to make it work.
Marijn
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recursive process as above is used to
remove focus from any subwindows.
Is that correct?
Thanks,
Marijn
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On 10/05/11 15:02, Matthew Flatt wrote:
At Wed, 05 Oct 2011 15:00:06 +0200, Marijn wrote:
Suppose one has a spreadsheet-like grid drawn on a canvas%. How does
one add text-field%-style behavior to the rectangles drawn?
You could implement an `editor-admin%' subclass to manage a `text
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On 10/07/11 14:17, Matthew Flatt wrote:
At Fri, 07 Oct 2011 13:06:23 +0200, Marijn wrote:
I've prepared a chopped-down attempt which defines an editor, an
administrator and a display class and instantiates them.
Unfortunately the editor doesn't
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On 10/06/11 13:31, Matthew Flatt wrote:
At Thu, 06 Oct 2011 12:40:18 +0200, Marijn wrote:
- - The display (a grid in my case) should create an
editor-admin% which in turn should have a field to refer back to
its display. When an editor becomes
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On 10/06/11 16:17, Matthew Flatt wrote:
At Thu, 06 Oct 2011 16:07:01 +0200, Marijn wrote:
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On 10/06/11 13:31, Matthew Flatt wrote:
At Thu, 06 Oct 2011 12:40:18 +0200, Marijn wrote:
- - The display
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Dear list,
Suppose one has a spreadsheet-like grid drawn on a canvas%. How does
one add text-field%-style behavior to the rectangles drawn?
Marijn
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...
Marijn
[1]:http://dynamo.iro.umontreal.ca/~gambit/wiki/index.php/Dumping_Grounds
At Wed, 31 Aug 2011 11:46:34 +0200, Marijn wrote:
[1 multipart/signed (7bit)] [1.1 multipart/mixed (7bit)]
[1.1.1 text/plain; ISO-8859-1 (quoted-printable)] Hi Laurent,
On 08/30/11 09:18, Laurent wrote
: why is it only equivalent to update on Windows?
Marijn
[1]:http://docs.racket-lang.org/reference/file-ports.html?#%28def._%28%28lib._racket/private/base..rkt%29._open-output-file%29%29
[2]:http://docs.racket-lang.org/reference/file-ports.html?#%28def._%28%28lib._racket/private/base..rkt%29._with
a match to an object, and then
show a better way. What I did not like very much is how the first way is
really verbose and made me question whether to read on, and in
retrospect the way using match isn't much less verbose. Wouldn't a
simple (apply on-action (rest a-match)) work?
Marijn
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3))
It seems to work.
On Jun 17, 2011, at 8:19 AM, Sam Tobin-Hochstadt wrote:
On Fri, Jun 17, 2011 at 7:36 AM, Marijn hk...@gentoo.org wrote:
My understanding so far is that `macro' expands to a use of the
`link' constructor which is somehow not allowed. All my attempts
to duplicate
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On 06/22/11 14:42, Marijn wrote:
Hi list,
I'm quite interested in the FrTime language, and decided to use my new
knowledge of implementing graphical programs in Racket to try and bluff
my way into a bit of FrTime hacking. Unfortunately it seems
-number field2))
(define field-sum (new ft-message% (parent root) (stretchable-width #t)
(label (string-append
Sum:
(number-string (+ number1 number2))
(send root show #t)
Marijn
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and
I just checked the option is turned on in my prefs.
I don't see the problem with Ctrl-f and no purple ellipse.
I'm using a few days old git version on an amd64 Gentoo linux box.
Marijn
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(require 'macro)
(dlist 3))
It seems to work.
Thanks, I'll use `define-struct' and `make-' for now until this is fixed.
Marijn
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iEYEARECAAYFAk3/DUYACgkQp
. Further
I do not understand why my custom display code is called so often.
Lastly, I wonder if there is a benefit to specific orderings of the
shared clauses or not?
Thanks,
Marijn
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and release to increase the slider from 0 to 1
the interactions window shows:
(object:slider% ...)
slider@1307345547311: 1
Marijn
On 06/03/11 18:19, Antonio Menezes Leitao wrote:
Hi,
I noticed a strange behavior in Racket slider% widget.
It seems that when I stop dragging the slider it makes
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On 06/06/11 15:14, Eli Barzilay wrote:
20 minutes ago, Marijn wrote:
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Hi,
why does the following code
#lang racket
(struct _dl (left val right))
(define (dlist a b c)
#1=(_dl #f a #2=(_dl
in the
place of id,
or a thunk which returns an identifier other-id, which is used to
convert each use of id to other-id.
My understanding of the rest of that subsection is yet too low to
attempt a rewrite.
Marijn
[1]:http://docs.racket-lang.org/reference/for.html?q=for/hash#(part._.Deriving_
-first' which returns #f for empty hashes
but otherwise returns an integer which is an index to the first element
in the hash table (which sounds like hash tables are implemented using
arrays and an index to the underlying array is returned).
Marijn
PS Note how hash table is spelled differently
, forcing me to write
(make-immutable-hash '())..
Is there a reason for this lack of simmetry?
P.
`make-immutable-hash' is for constructing immutable hashes from
association lists; `hash' is the immutable equivalent of `make-hash'.
Marijn
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On 05/30/11 10:30, Marijn wrote:
Hi Pierpaolo,
On 05/30/11 10:24, Pierpaolo Bernardi wrote:
BTW, since the topic of empty tables has been brought up: I am often
(mildly) annoyed by the fact that make-hash takes 0 or 1 argument,
while make
the difference between traversing until
the first non-disappeared key and traversing the complete table would
still be significant, wouldn't it?
Marijn
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Hi,
I would like to call some code when a user clicks the X in the upper
left/right corner (close window button) or presses Alt-F4, but I didn't
find anything about it in the docs. Any help?
Thanks,
Marijn
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Hi Matthew,
On 05/24/11 20:59, Matthew Flatt wrote:
At Tue, 24 May 2011 15:54:55 +0200, Marijn wrote:
After changing all the values to 1, when pressing an insert-button
*sometimes* the window is resized horizontally (slightly larger width
Hi Matthew,
On 05/24/11 05:02, Matthew Flatt wrote:
At Mon, 23 May 2011 16:04:24 +0200, Marijn wrote:
I'm trying to implement a toy graphical list editor program to get a
feel for GUI programming in racket. Basic idea is a graphical
representation of a list with text-field%s alternated
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Hi,
is it possible to set the line-spacing in scribble documents? I searched
for `line-spac' in the manual but that only seems to find racket/gui
methods...
Thanks,
Marijn
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Comment
and rudimentary functioning of the
program is attached.
Side-question: why does pressing an insert-button resize the top-level
frame%?
Any help appreciated,
Marijn
#lang racket/gui
(define f (new frame% [label List Editor]))
(define items (new vertical-pane% (parent f)))
(define (create-item
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