On 02/01/2012 10:09 PM, Curtis Dutton wrote:
I'm receiving this error after my webserver is running for a few days.
Hosting a plt webserver on Ubuntu server, I'm using the racket/db
library to access a local postgres database. After a few hundred
requests, over a period of days, I eventually get
Thanks for the fast and on-the-spot response!
Is there a way to run the preprocessor only so that I can see what code that
construction expands to before being passed to the read-eval loop?
- Original Message -
From: "Matthias Felleisen"
To: "Rüdiger Asche"
Cc:
Sent: Wednesday, Fe
I'm receiving this error after my webserver is running for a few days.
Hosting a plt webserver on Ubuntu server, I'm using the racket/db library
to access a local postgres database. After a few hundred requests, over a
period of days, I eventually get this error message. "query-rows:
connection is
On Feb 1, 2012, at 1:55 PM, Roelof Wobben wrote:
> So in my opion I can solve this at this way :
>
>
> grosspay = hours_work * 12,5
> tax = grosspay * 0,15
> netpay = grosspay - tax.
>
> So I did this :
>
> (define (grosspay h)
> (* h 12.50))
>
> (define (tax grosspay)
>( * grosspay 0.
Hello,
I have this problem :
Utopia's tax accountants always use programs that compute income taxes
even though the tax rate is a solid, never-changing 15%. Define the
program tax, which determines the tax on the gross pay.
Also define netpay. The program determines the net pay of an employee
f
On 02/01/2012 09:45 AM, Rüdiger Asche wrote:
Hi there,
I'm trying to get a grip on macros. Here is a very simple Racket expression
(1):
(letrec [(a 2)
(b 3)
(afn (lambda (x) (+ x a)))
(bfn (lambda (x) (+ x b)))]
(afn (bfn 2)))
Now I need a syntactic abstraction
Something like this might be what you want:
(letrec-syntaxes+values ([(absfn)
(syntax-rules ()
[(_ varname) (lambda (x) (+ (+ x localc)
varname))])])
([(a) 2]
[(b) 3]
[(localc) 4]
[(afn) (absfn a)]
[(bfn) (absfn b)])
(afn (bf
Hi there,
I'm trying to get a grip on macros. Here is a very simple Racket
expression (1):
(letrec [(a 2)
(b 3)
(afn (lambda (x) (+ x a)))
(bfn (lambda (x) (+ x b)))]
(afn (bfn 2)))
Now I need a syntactic abstraction for afn and bfn. The following will
do in
Would this work:
http://docs.racket-lang.org/net/pop3.html?q=pop3
(In general, type 'pop3' in DrRacket and hit F1. Or 'raco doc pop3' in a
shell.)
On Feb 1, 2012, at 9:37 AM, Stefan Schmiedl wrote:
> Greetings,
>
> is there a POP3 client module for racket somewhere out there?
>
> Thanks
Greetings,
is there a POP3 client module for racket somewhere out there?
Thanks,
s.
--
"This is why Science and Mathematics are still much fun:
You discover things that seem impossible to be true
and then get to figure out why it's impossible for them not to be."
-- Vi Hart: Spiral
At Wed, 01 Feb 2012 11:04:36 +0100, Marijn wrote:
> On 30-01-12 19:08, Matthew Flatt wrote:
> > A note on alignment:
> >
> > The `text%' class supports 'right and 'center paragraph alignment,
> > which more or less works when the editor has a maximum width. (The
> > docs have some caveats.)
> >
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Hash: SHA1
On 30-01-12 19:08, Matthew Flatt wrote:
> A note on alignment:
>
> The `text%' class supports 'right and 'center paragraph alignment,
> which more or less works when the editor has a maximum width. (The
> docs have some caveats.)
>
> So, you can get
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