At Sun, 8 Aug 2010 21:59:41 -0400,
Joe Snikeris wrote:
> Is there a way for a procedure to modify bindings in it's parent
> environment? I suppose the technique would be similar to passing a
> C-style pointer to the procedure.
Boxes would probably give you what you want.
http://docs.racket-lang.
Bill Richter wrote at 08/08/2010 10:01 PM:
I think the question is when Racket plans to take over the world of
web applications. Racket isn't ready to take over now, because the
docs don't have enough examples. But maybe you racketeers need
another 10 years anyway, so right now, the docs only
You can do it using a simple macro
(define-syntax f
(syntax-rules ()
((_ a n) (set! a n
(define p 1)
(f p 3)
p
> 3
(define r 5)
(f r 30)
r
> 30
Hari
- Original Message -
From: "Joe Snikeris"
To: users@racket-lang.org
Sent: Sunday, August 8, 2010 9:59:41 PM GMT -05:00 US/Can
On 09.08.10 03:59, Joe Snikeris wrote:
Hi all,
Is there a way for a procedure to modify bindings in it's parent
environment? I suppose the technique would be similar to passing a
C-style pointer to the procedure.
For example:
(define p 1)
(f p 3)
p
3
Something like this?
#lang racket
(def
Yes, but still, upload your code to the cookbook.
Definitely, Shriram. Ben was excited when I told him you said he
should upload to www.schemecookbook.org. A Sudoku solver is a good
programming exercise, because Sudoku is all about sets & functions,
which become Scheme through map, filter & b
Hi all,
Is there a way for a procedure to modify bindings in it's parent
environment? I suppose the technique would be similar to passing a
C-style pointer to the procedure.
For example:
(define p 1)
(f p 3)
p
> 3
Define f...
Thanks in advance,
Joe
Thanks! That worked.
Justin
On Sun, Aug 8, 2010 at 3:41 PM, Hari Prashanth wrote:
> You must use #lang slideshow. If you use #lang racket you get that error.
> I dont know why or what it means.
>
> HTH
> Hari
>
> - Original Message -
> From: "Justin Zamora"
> To: users@racket-lang.org
You must use #lang slideshow. If you use #lang racket you get that error.
I dont know why or what it means.
HTH
Hari
- Original Message -
From: "Justin Zamora"
To: users@racket-lang.org
Sent: Sunday, August 8, 2010 3:11:20 PM GMT -05:00 US/Canada Eastern
Subject: [racket] Problem with ge
I'm using the simple "Hello, World" slideshow from the docs:
#lang slideshow
(slide
#:title "How to Say Hello"
(t "Hello World!"))
When I run get-slides-as-picts, I get the following error:
> (get-slides-as-picts "simple-slide.rkt" 1024 768 false)
send: target is not an object: #f for method:
May be we can help better with a reference to the exercise.
I really can't make up what you are trying to do.
Jos
_
From: users-boun...@racket-lang.org [mailto:users-boun...@racket-lang.org]
On Behalf Of iam_h...@aol.in
Sent: 08 August 2010 19:20
To: users@racket-lang.org
Subject: [racke
Hello schemers
what if I have program of massage passing and I have to return the object when
it is defined.
example-
(define (single-order)
(let (
(delivery #f)
)
(define (the-order req)
(cond ((eq? req 'available) available)
(else (error "the-order: unknown r
> I suppose you're right, but you (aren't you one of the maintainers?)
> may not be a good judge of whether the documentation has enough
> examples for the ''everyday programming'' folks Racket is targeting.
No, I'm not one of the maintainers :-).
I'm still very much a newbie in computing.
> I a
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