I'm not sure if this is a bug or if I'm just misunderstanding something.
(define-struct/contract myposn
((x number?) (y number?))
#:transparent)
(make-myposn 3 4) ; works as I would expect
(make-myposn 3 "hello")
complains
#%htdp: '#%htdp broke the contract
(-> number? number? symbol? any
The default prompt handler is
(lambda (abort-thunk)
(call-with-continuation-prompt abort-thunk prompt-tag #f))
When the `abort-thunk' is `(lambda () (f2))', as in `f2', then the
prompts stack up, because `f2' installs a prompt as well.
Here's an infinite loop that uses the default prompt ha
np
Just wanted to make you aware of it if you weren't already.
On Mon, Sep 6, 2010 at 3:03 PM, Robby Findler
wrote:
> There are some fixes to the power this weekend in the building at
> Northwestern where this machine is so things will not be working
> properly until tomorrow earliest. Sorry.
>
I'm a little confused by the tail behavior I'm seeing in
call-with-continuation-prompt and abort-current-continuation. Here's
my test code:
;
#lang racket
(provide (all-defined-out))
(define (f)
(call-
There are some fixes to the power this weekend in the building at
Northwestern where this machine is so things will not be working
properly until tomorrow earliest. Sorry.
Robby
On Mon, Sep 6, 2010 at 12:23 PM, Todd O'Bryan wrote:
> I get a 404 error with this link from the download page:
>
> ht
I get a 404 error with this link from the download page:
http://www.eecs.northwestern.edu/racket/5.0.1/racket/racket-5.0.1-bin-i386-win32.exe
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Thanks, Jay.
I haven't looked thoroughly yet, but I suspect that simply moving the
SSL client context object from a hidden variable to a public parameter
would be a small change that's a lot more flexible.
I'm working with the old PLT 4.2.5 "openssl" code early this week, so I
might soon be
I doubt there is a good reason for these restrictions. I imagine that
it works this way because it is only used by a few people and this is
all they needed. IIRC, only the hand-in server uses it in the tree.
I'm happy to work with you to improve it, if I understood what exactly
you wanted.
Jay
O
I agree with Noel.
As far as make-url, send/suspend/dispatch captures a continuation, but
unless you create a request handler that returns to it (via make-url),
it is not stored or bound to any URL.
Jay
On Mon, Sep 6, 2010 at 6:05 AM, Noel Welsh wrote:
> I made some brief notes, which I reprodu
On Sun, Sep 5, 2010 at 7:01 AM, Eli Barzilay wrote:
> On Sep 4, Todd O'Bryan wrote:
>>
>> After the script finishes,
>>
>> $ gksudo gedit /etc/environment
>>
>> and add /opt/plt/bin to the PATH variable defined there. Separate it
>> from the other paths with a colon.
>>
>> When you log out and lo
I made some brief notes, which I reproduce below ('cause I'm too lazy
to write them out again):
;; NHW
;; This function is odd. Its type is
;; (U Number String) -> (U Number String)
;; which is almost certainly not what you want.
(define (as-number x)
(if (number? x)
x
(safely (string-
Please, does someoe know how to use the program "plt-r5rs" with only
Latin 1 (ISO-8859-1) encoding?
That's quite old, I know, but I need to do so...
Many thanks in advance,
J.-M. Hufflen
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So, I'm learning the ropes of using Racket as a webserver. I'm building a
simple
VAT (tax) calculator. I present my code at the end of this post (which you can
also download via google code).
I think it would be helpful to me if you could critique it a little.
The idea is that you point your
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