Hello!
Type checker returns an error while translating this piece of code:
(: permutations ((Listof Index) - (Listof (Listof Index
(define (permutations lst)
(cond
[(empty? lst) '(())]
[else (for*/list: : (Listof (Listof Index))
([x : Index (in-list lst)]
You might have already read it, but I also found the guide Fear of
Macros by Greg Hendershott incredibly helpful in understanding them,
especially considering things like with-syntax and format-id:
http://www.greghendershott.com/fear-of-macros/index.html
On 03.05.13 04:57, Sean McBeth wrote:
Hi,
is raco setup limited to use a maximum of 4 processors in parallel? I
always get
--- parallel build using 4 processes ---
even if i use
env PLT_SETUP_OPTIONS=-j 16
Interestingly (processor-count) shows 16, and raco setup should use this
value by default (at least the docs claim that).
It is with a 32 bit build (possibly only under windows, I forget).
I believe the issue is that the docs building phase runs out of memory with
more.
Robby
On Fri, May 3, 2013 at 6:47 AM, Tobias Hammer tobias.ham...@dlr.de wrote:
Hi,
is raco setup limited to use a maximum of 4 processors
Good hint.
Only on 32bit linux it's limited to 4 and on 64bit the hard limit seems to
be 8.
It's good as default but i am a bit surprised that i can't even increase
it explicitly.
I think at least on 64bit OS there should be no limit at all.
Tobias
On Fri, 03 May 2013 13:53:58 +0200,
I think it doesn't scale past about 6, which is probably why the limit of 8
is there.
Robby
On Fri, May 3, 2013 at 7:00 AM, Tobias Hammer tobias.ham...@dlr.de wrote:
Good hint.
Only on 32bit linux it's limited to 4 and on 64bit the hard limit seems to
be 8.
It's good as default but i am a
I think i just misread the docs. I somehow though that PLT_SETUP_OPTIONS
also works for directly calling raco setup which is obviously wrong. When
i use -j it works as expected. Sorry for the trouble.
As a side note, maybe it's worth to specify these defaults in the docs for
raco setups -j
At Fri, 03 May 2013 20:29:42 +1200,
Сергей Самойленко wrote:
Hello!
Type checker returns an error while translating this piece of code:
(: permutations ((Listof Index) - (Listof (Listof Index
(define (permutations lst)
(cond
[(empty? lst) '(())]
[else (for*/list: :
Is it practical or possible to replace any series of chars using list
functions instead of using string functions such as regexp-replace?
I can remove from an apple, a peel, with a knife.
I can remove from an orange, a peel, with the same knife.
However,
I can remove from a string, any
Wow, section 4 is exactly, almost word for word, what I was trying to do.
This is a great resource.
On Fri, May 3, 2013 at 7:35 AM, Philipp Dikmann phil...@dikmann.de wrote:
You might have already read it, but I also found the guide Fear of
Macros by Greg Hendershott incredibly helpful in
Strings and lists are both sequences, so you can write functions that
work on sequences. For example:
;
#lang racket
(define (peel seq)
(define n (sequence-length seq))
(define seq-without-head
(sequence-tail seq 1))
(define seq-without-ends
(for/list
Hi Matthew,
Jens's minipascal might be a good example to look at:
https://github.com/soegaard/minipascal
Racket Users list:
http://lists.racket-lang.org/users
I've just released version 0.4 of Geiser (http://geiser.nongnu.org ), an
Emacs package to interact and program with Racket and Guile.
New features:
- New command geiser-insert-lambda, bound to C-c \ in Scheme
buffers (thanks to Ray Racine).
- Configurable case-sensitivity when
2013/5/3 Danny Yoo d...@hashcollision.org
Hi Matthew,
Jens's minipascal might be a good example to look at:
https://github.com/soegaard/minipascal
The intention was to turn the code into a tutorial, so the code
is well-commented.
The grammar is defined here:
Three hours ago, Jose A. Ortega Ruiz wrote:
New features:
- New command geiser-insert-lambda, bound to C-c \ in Scheme
buffers (thanks to Ray Racine).
If you go to the extent of doing this, then maybe it's worth it to do
more? I have a file that adds a whole bunch of these
I'm trying to make a kernel interpreter in Racket, I've based the code on Qoppa
(https://github.com/kmcallister/qoppa)
kernel.rkt
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