I have issue with find-executable-path function on Windows. I update
Windows's environment path to include the path to executable I want to run,
and verify that it is indeed added via run->cmd. However, when I call
find-executable-path on that executable, it returns #f. Even when I move
the executa
On Jul 12, 2014, at 10:17 PM, Alexander D. Knauth wrote:
>
> On Jul 12, 2014, at 6:43 PM, Brian Adkins wrote:
>
>> I probably won't keep my defpat macro, at least not in its present form (for
>> one, it only handles a single arg); there's probably a balance between being
>> concise and bein
On Jul 12, 2014, at 6:43 PM, Brian Adkins wrote:
> On Jul 12, 2014, at 6:19 PM, Daniel Prager wrote:
>
>> Hi Brian
>>
>> r >= 0 && r <= 4 && c >= 0 && c <= r
>>
>>
>> implies
>>
>> 0 <= c <= r <= 4
>>
>>
>> Or using prefix and the variable-arity of <=:
>>
>> (define (is-pos r c)
>> (<=
On Jul 12, 2014, at 6:17 PM, Asumu Takikawa wrote:
> On 2014-07-12 16:18:55 -0400, Brian Adkins wrote:
>> 1) It's odd to me to specify the l argument, and then never refer to it.
>> 2) The syntax of the former seems less "noisy".
>
> I agree that the syntax can be noisy for simple cases.
>
> The
On Jul 12, 2014, at 6:19 PM, Daniel Prager wrote:
> Hi Brian
>
> r >= 0 && r <= 4 && c >= 0 && c <= r
>
>
> implies
>
> 0 <= c <= r <= 4
>
>
> Or using prefix and the variable-arity of <=:
>
> (define (is-pos r c)
> (<= 0 c r 4))
>
>
> which I think works well for clarity, concision, an
Hi Brian
r >= 0 && r <= 4 && c >= 0 && c <= r
implies
0 <= c <= r <= 4
Or using prefix and the variable-arity of <=:
(define (is-pos r c)
(<= 0 c r 4))
which I think works well for clarity, concision, and efficiency.
Dan
Racket Users list:
http://lists.racket-l
On 2014-07-12 16:18:55 -0400, Brian Adkins wrote:
> 1) It's odd to me to specify the l argument, and then never refer to it.
> 2) The syntax of the former seems less "noisy".
I agree that the syntax can be noisy for simple cases.
The design rationale for having the header is to allow optional,
ke
Brian Adkins wrote at 07/12/2014 04:19 PM:
Thanks for the advice Neil. I'm a little confused by your "Racket is an imperative
language" statement though - it seems quite "functional" to me, which was one of the
attractions.
[...]
Racket can be used as a functional language, so long as one rem
Thanks for the advice Neil. I'm a little confused by your "Racket is an
imperative language" statement though - it seems quite "functional" to me,
which was one of the attractions.
The Haskell code was written a few years ago, as a relative newbie, as an
exercise in emphasizing readability and
Thanks. I did look at define/match but:
(defpat (is-pos (list r c))
(and (member r (lgen 0 4))
(member c (lgen 0 r
seems nicer to me than:
(define/match (is-pos l)
[((list r c)) (and (member r (lgen 0 4))
(member c (lgen 0 r)))])
for two reasons:
1) It's odd to
I'm not used to the reply-to begin set to the individual vs. the list for
racketusers, so I'll forward a few replies...
Begin forwarded message:
> From: Brian Adkins
> On Jul 12, 2014, at 1:17 PM, Matthias Felleisen wrote:
>> On Jul 12, 2014, at 12:53 PM, Brian Adkins wrote:
>>
>>> I'm porting
Why is it a name per type? That seems wrong, since a function with docstring
struct should have the object-name of the function, or something refined. The
struct itself could be used for potentially every function a user writes,
rendering object-name overly vague.
-Ian
- Original Message ---
This doesn't count as "soon", but I finally cleaned up my patch for
this: https://github.com/plt/racket/pull/729
It's not as general as what Alexander envisioned, so it should
probably be generalized.
Sam
On Wed, Apr 30, 2014 at 5:13 PM, Sam Tobin-Hochstadt
wrote:
> I've written 75% of a patch
Complementary to the suggestions that Matthias and Jens Axel made, also
remember that Racket has a very different evaluation model than Haskell.
Consider reworking the use of the "and" form and everything within it:
instead, test "r" and "c" for "integer?", and then use "<=" and ">=" to
determ
This is fun! I loved how my screen would shake and flicker each time I get
slammed by a fire volley. Certainly got my adrenaline pumping.
On Sat, Jul 12, 2014 at 12:01 PM, David Vanderson wrote:
> For the past 6 months my hobby has been writing the beginnings of a
> lan-party game in Racket:
>
Hi Brian,
I think you want define/match.
(define/match (is-pos l)
[((list r c)) (and (member r (range 0 4))
(member c (range 0 r)))])
(is-pos '(2 5)) ; => #f
(is-pos '(2 1)) ; => '(1)
/Jens Axel
2014-07-12 18:53 GMT+02:00 Brian Adkins :
> I'm porting more Haskell code
On Jul 12, 2014, at 12:53 PM, Brian Adkins wrote:
> I'm porting more Haskell code to Racket as a learning exercise. When I got to
> this line:
>
> isPos (r,c) = elem r [0..4] && elem c [0..r]
>
> I first wrote this:
>
> (define (is-pos r c) (and (member r (lgen 0 4))
>
I'm porting more Haskell code to Racket as a learning exercise. When I got to
this line:
isPos (r,c) = elem r [0..4] && elem c [0..r]
I first wrote this:
(define (is-pos r c) (and (member r (lgen 0 4))
(member c (lgen 0 r
where lgen is:
(define (lgen m n) (build-
> The `configure-runtime` submodule name is special: when "main.rkt" is
> run as a program, then `configure-runtime` is loaded and instantiated
> first --- before the result of "main.rkt", and before the imported
> "foo.rkt" and "bar.rkt" modules.
>
> This strategy only makes sense for configuratio
Matthew Flatt writes:
> Every once in a while, I find that option 2 works well with the pattern
>
> foo.rkt:
>#lang racket
>(define-logger foo) ; uses `(current-logger)`
>
> bar.rkt:
>#lang racket
>(define-logger bar) ; uses `(current-logger)`
>
> main.rkt:
>#lang racket
>
==
CALL FOR PARTICIPATION
WGP 2014
10th ACM SIGPLAN Workshop on Generic Programming
Gothenburg, Sweden
Sunday,
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