Wow ... Thanks Mathew and Jens.
I think, in future I should just ask "how do I do such and such" - "can I
do such and such is an unnecessary question in racket" :)
Regards,
Kashyap
On Fri, Oct 31, 2014 at 1:21 AM, Jens Axel Søgaard
wrote:
> MetaPict supports arbitrary curves and will produce p
I can see why you might want or expect '(4) below, and it turns out
that changing `delay` to `delay/thread` makes the result '(4) instead
of '(5).
We could extract that facet of `delay/thread` (without the concurrency)
as
(define-syntax-rule (delay* e)
(let ([params (current-parameterization)
1. I tryed to run it localy but all I can see in the browser is the html site!
The console is no where to see! I don't get any errors! I'm running it with
drracket!
I open main.rkt in DrRacket and run it then goto my browser ( tryed firefox,
iexplore and chrom) and open localhost:8080 but i s
Hi all,
Does this seem like the morally-correct thing for promises to do in the
presence of parameters?
-> (define x (make-parameter 3))
-> (define y (parameterize ((x 4)) (delay (list (x)
-> (parameterize ((x 5)) (force y))
'(5)
I was expecting '(4), because I felt that delay should be more
On Wed, Oct 29, 2014 at 5:50 AM, Konrad Hinsen
wrote:
> Sam Tobin-Hochstadt writes:
>
> > > This suggests that if I want my single-form module to be handled exactly
> > > like a multi-form module, my single form must expand to something else
> > > than #%plain-module-begin. Fine. But who or wha
MetaPict supports arbitrary curves and will produce picts.
http://soegaard.github.io/docs/metapict/metapict.html
Given points p, q, r, ... and vectors (directions) d, e, f ... :
(curve p .. q .. r .. s) draws a "nice" curve from p through q and r to s
(curve p .. q d .. r .. s) draws a
Polymorphic types generate impersonator contracts for the type
variables (a and b, here). Contracts for hashes (such as `hash/c`)
don't accept impersonator contracts on keys.
Sam
On Thu, Oct 30, 2014 at 3:22 PM, Alexander D. Knauth
wrote:
> What I did to get around this was use require/typed wit
What I did to get around this was use require/typed with a more useful type,
but when I tried it again just now it didn’t work any more. This used to work,
what changed? And why would it expect a flat contract anywhere?
#lang typed/racket
(require/typed racket/base
[hash (Al
Yes, the `dc` pict constructor provides a bridge between `racket/draw`
and picts:
#lang slideshow
(slide
(dc (lambda (dc x y)
(send dc draw-spline
x y
(+ x 20) (+ y 80)
(+ x 100) (+ y 100)))
100 100))
At Thu, 30 Oct 2014 23:46:21 +053
Dear Racket folks,
I'd like to use Dr Racket to generate some drawings. I liked the way I can
compose and create images using slideshow. I could not figure how I could
draw arbitrary curves though?
When I looked for it I found the racket/draw package. Can the racket/draw
functions be used along w
I haven't tried it myself, but it looks like the main.rkt sets up a
webserver to handle requests, using define-values to route urls and runs
the code in a sandbox. So as to your question "where is the server?", it's
wherever you launch main.rkt. As the instructions say, your url should
just be loc
> I wouldn't expect the type checker to support all working plain Racket
> code. But I do expect Typed Racket to provide equivalent (though
> possibly syntactically different) APIs for common tasks such as
> creating an immutable hash table from key-value pairs.
>
> I suppose the problem with hash
Sam Tobin-Hochstadt writes:
> This isn't a different version of `hash` -- instead, it's the same
> version, with a type that doesn't accept every working untyped Racket
> program.
This make sense from the point of view of the language implementation,
but not from the point of view of the langu
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