If I want the SICP package in PLaneT to be usable via #lang sicp, is
the right way to have the package's installer create a *collection link*?
And it should be (links #:user? #true ...)?
Neil V.
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At Tue, 07 May 2013 05:33:06 -0400, Neil Van Dyke wrote:
If I want the SICP package in PLaneT to be usable via #lang sicp, is
the right way to have the package's installer create a *collection link*?
I don't think there's a right way to do that with PLaneT. A package
with the new package
Yes, sure:
#lang racket
(require redex 2htdp/image)
(define-language L
(t ::= RED YELLOW GREEN))
(define RED(circle 14 solid red))
(define YELLOW (circle 14 solid yellow))
(define GREEN (circle 14 solid green))
(define R
(reduction-relation
L
(-- RED GREEN)
(-- YELLOW RED)
Have you folks seen this?
http://lispinsummerprojects.org/
Looks like fun.
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Code in Racket, win prizes.
http://lispinsummerprojects.org/
Not sure if this has already been made known on the Racket user's list.
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Hi John,
2013/5/7 John Gateley rac...@jfoo.org
Here's a summary of the responses. Thanks to everyone who
replied. My comments are in [ and ]. Not much new though.
5) Is there an implementation of vectors that can change in size?
Like C++'s std::vector?
I've added a sentence to the docs pointing out the use of write-special and
a silly example at the end too.
I tried to make a silly example using 'plot', something like this, but it
isn't that great. If others have suggestions, I think it would be nice to
show plot here ...
#lang racket
(require
2013/5/7 John Gateley rac...@jfoo.org
5) Is there an implementation of vectors that can change in size?
Like C++'s std::vector?
http://docs.racket-lang.org/**data/gvector.htmlhttp://docs.racket-lang.org/data/gvector.html
[This is close, but I don't see an operation to explicitly grow the
On 05/06/2013 01:25 PM, Ray Racine wrote:
Neil,
Here in is an implementation of the digamma function.
Cool! Welcome to the High Priesthood of the... crazy people who do
floating-point implementations. :)
BTW, I'm not clear on what you're requesting from me. Nearest I can come
up with is
I came across a link for Realm of Racket. And it's seems to have the same goal
as HtDP, but more game-based. I was wondering what other differences RoR had
vs. HtDP. Should one use both or is that redundant? If both, is there a reading
order?
Racket Users list:
First of all I've started using some of the new math and prob stuff for
real and it's all fantastic work. Thank you.
Was looking for a routine for sums of a matrix along the either the rows or
cols axis.
See http://docs.scipy.org/doc/numpy/reference/generated/numpy.sum.html
I didn't notice
Hi all,
Does anyone know if there is an implementation of Advanced Student Language
in Redex?
I'm looking for a relatively clean language with if, cond, lambda, and
set!. The Redex/examples directory has only Beginner Student (which doesn't
have a store) and R6RS (which is overkill).
Justin
Well crap ...
I think I searched the Racket doc for digamma found nada, tried psi and
blew it as I never progressed beyond implements a polygamma function and
failed to recognize it for what it was.In other words, I flat missed
it. So I was sort of asking about the process of voir dire'ing
Hello,
I just came across the following oddness with formatting
of real numbers:
(~r 1.0 #:notation 'exponential #:precision '(= 4))
1.e+00
OK
(~r 0.0 #:notation 'exponential #:precision '(= 4))
0.e+04
???
Is there a rational explanation of why did
the requested precision go into the
And thanks for the overview on FP implementation and evaluation, very
instructive. Saving this email for reference down the road.
On Tue, May 7, 2013 at 11:39 AM, Neil Toronto neil.toro...@gmail.comwrote:
On 05/06/2013 01:25 PM, Ray Racine wrote:
Neil,
Here in is an implementation of the
2013/5/7 Ray Racine ray.rac...@gmail.com
First of all I've started using some of the new math and prob stuff for
real and it's all fantastic work. Thank you.
Was looking for a routine for sums of a matrix along the either the rows
or cols axis.
See
Well since I gone this far, I took the unusual step of implementing the
algorithm (more?) correctly this time.
On the Toronto scale, we are mostly accurate for most of the domain x
0.
For x0 the use of psi(1 - x) - psi (x) = pi * cot(pi * x), not so good.
For x 0, outside the subdomain
Trying to use regexp-match to return a line containing a specified string...
;Create fn: find-string.ss.
;Given a file and a find-string.
;Returns a line-string with first find.
;The input file has a lot of lines.
;I am thinking it would be good to filter all but the line of interest,
Can you apply the verbage that must be represented by the symbols in Racket
regexp documentation shown below:
;;= means what?
| means what?
pces means what?
---
‹*regexp*›
::=
‹*pces*›
Match ‹*pces*›
|
On May 7, 2013, at 5:14 PM, Don Green infodeveloper...@gmail.com wrote:
Can you apply the verbage that must be represented by the symbols in Racket
regexp documentation shown below:
;;= means what?
is one of
| means what?
or
pces means what?
a phrase described by the definition of
On Tue, May 7, 2013 at 3:14 PM, Don Green infodeveloper...@gmail.comwrote:
Can you apply the verbage that must be represented by the symbols in
Racket regexp documentation shown below:
;;= means what?
| means what?
pces means what?
Hi Don,
You are seeing instances of Backus-Naur Form
On Tue, May 7, 2013 at 3:08 PM, Don Green infodeveloper...@gmail.com wrote:
Trying to use regexp-match to return a line containing a specified string...
;Create fn: find-string.ss.
;Given a file and a find-string.
;Returns a line-string with first find.
;The input file has a lot of
Per the suggestions of several folks (eli, robby) I've released a
unicode-properties package that provides definitions for a few of the most
commonly-used unicode properties (XID_Start, XID_Continue, and Bidi_Mirrored).
Perhaps more interesting, it also contains code to automatically download
I musta missed this; Siddarth Agarwal and Amey Karkare wrote a set of Racket
bindings for Z3. Maybe they would consider uploading this as a not-planet-2
package?
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On 05/07/2013 02:58 PM, Ray Racine wrote:
Well since I gone this far, I took the unusual step of implementing the
algorithm (more?) correctly this time.
On the Toronto scale, we are mostly accurate for most of the domain x 0.
I noticed. Cool!
For x0 the use of psi(1 - x) - psi (x) = pi *
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