Hi Meino,
I run Racket on my Raspberry Pi (version 2 and 3)[*]. I download unix
source + built packages and build the "core" following the instructions
in src/README:
https://github.com/racket/racket/blob/master/racket/src/README
Basically it's just:
mkdir build
cd build
../configure
make
make
Hi Matthew,
thanks fpr your reply! :)
I received a recipe how to modify the configuration
of the ARMBIAN to pull from "unstable" source.
"Unstable" includes racket 6.6 (and hopfully 6.7
soon) -- I think those "unstable" sources are of
Raspbian... :)
Still downloading/updateingfingers crossed.
If ARMBIAN and Raspbian are compatible, then you could try the Utah
snapshot site's Raspbian build:
http://www.cs.utah.edu/plt/snapshots/
At Fri, 28 Oct 2016 03:21:49 +0200, meino.cra...@gmx.de wrote:
> Hi,
>
> after putting Racket on my desktop Linux box and on my tablet
> (ARCHLinux chroot,
Thank you, Jay McCarthy, for making it possible to create Racket-based apps for
Android. This was a necessity for our Global Learning XPRIZE project, and it's
working superbly. I really like the capability you provided to develop on the
Mac platform, test in a Mac-based simulator, and then expo
None of the below is meant to deter your voyage of discovery!
Have fun and hack around!
On Oct 27, 2016, at 12:17 PM, lfacc...@jhu.edu wrote:
> I cannot name a single other example of embedded DSL in Racket that
> operates with syntax objects directly. Can you think of something better?
1) Perh
Perhaps not the answer you want, but you could always pull the source from the
github repo and compile it for arm.
Ken
On Thursday, October 27, 2016 at 9:21:57 PM UTC-4, meino.cramer wrote:
> Hi,
>
> after putting Racket on my desktop Linux box and on my tablet
> (ARCHLinux chroot, x86 CPU) I w
Hi,
after putting Racket on my desktop Linux box and on my tablet
(ARCHLinux chroot, x86 CPU) I want to put Racket on my Orange PI
PC (which is a Raspberry Pi inspired SoC-Computer). This Orange
Pi PC runs a " ARMBIAN Debian GNU/Linux 8 (jessie) 3.4.112-sun8i"
The CPU is (according to /proc/cpuing
First of all, #lang racket is not Scheme, nor does it claim to be.
However, #lang r5rs does attempt to be Scheme, and it exhibits the same
behavior as #lang racket in this case, so your question is still valid.
I would argue that, in this case, Racket gets it right, and Bigloo and
Kawa are noncomfo
Hi,
why this does not work with DrRacket:
#lang racket
(define-syntax then
(syntax-rules ()
((_ ev) ev)
((_ ev ...) (begin ev ...
(define-syntax else
(syntax-rules ()
((_ ev) ev)
((_ ev ...) (begin ev ...
(if #f
(then
1
2
3)
(else
3
As a small followup to this, I managed to come up with the following
hacky workaround, which seems to be working alright so far.
Specifically, it’s a function that converts arbitrary preservable values
into expressions that evaluate to themselves:
(define preservable-property->expression
(ma
Have you looked into Clojure's Garden for a possible inspiration:
https://github.com/noprompt/garden
https://www.youtube.com/watch?v=-jnJGNDoSXc
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As a first step, try gdb like this:
$ gdb racket
(gdb) handle SIGSEGV nostop noprint
(gdb) run ... [arguments to run your program] ...
(gdb) where
to get a backtrace. Depending on the output, we should have an idea for
the next step.
At Thu, 27 Oct 2016 20:55:52 +0100, Erich Rast wrote:
> Hi
Hi!
I have a bug that in the Linux version of a mid-sized program (closed
source) that causes the program to immediately crash and also causes
DrRacket to immediately crash once the command key is pressed in some
editor in a tab panel of an open frame. No console output, hard crashes
to desktop. T
I hope to be a trend setter. Haven't really introduced myself but I find
racket a great toolset for getting %^&# done. I am not a student, I am a
professional. Racket at present has nothing to do with my regular job, at
the moment. I kind of was searching for something to expand my mindset and
I agree on the importance of an efficient algorithm. I do feel knowing
some of the internals of how language or development environment stores and
access values can be part of determining the nature of what is the most
efficient algorithm. Sometimes flaws in an environment can lead to a
counter i
Hi, all.
I am working on an embedded DSL for CSS in Racket. I want to get feedback from
the community regarding the project’s goals and my choice of tools for
implementing it.
LANGUAGE
I want to use Racket to generate CSS for me. I am not interested in a “#lang”
language, but in a DSL that live
You know, it's a very pleasant surprise to me how many messages I've
recently seen on this list that began "I'm just getting started with
Racket and" Great to see that the Racket community is growing.
On Thu, Oct 27, 2016 at 2:42 PM, Jos Koot wrote:
> Hi
>
> Lisp (and Racket) programmers kno
Hi
Lisp (and Racket) programmers know the value, Fortran (and assembler)
programmers the cost.
Nowadays the PLTeam is working on effeciency too, I think.
But: the most important factor for efficient programming is to select efficient
algorithms.
Two very simple, but notorious examples where you
On Thu, Oct 27, 2016 at 9:12 AM, Matthew Flatt wrote:
> At Wed, 26 Oct 2016 15:16:03 -0400, David Storrs wrote:
>> On Wed, Oct 26, 2016 at 2:30 PM, Matthew Flatt wrote:
>> > At Wed, 26 Oct 2016 14:01:15 -0400, David Storrs wrote:
>> >> What is "-l-" ? (That's an "ell", right? Not a 1 / pi
Thank you for the information. Good to know. Performance isn't the first
thing I am thinking about, but as I am tinkering and getting running with
Racket I like to kind of dig into the underlying structure to know the cost of
certain operations.
Ken
> For accessing an arbitrary member, yes.
On Thu, Oct 27, 2016 at 1:09 PM, Ken MacKenzie wrote:
> Thank you that makes sense. Vectors are fixed length so in theory could I
> also say a Vector is possibly more performant than an equivalent list?
>
> Ken
>
For accessing an arbitrary member, yes. A Racket vector is like, say, a C
array: i
Thank you that makes sense. Vectors are fixed length so in theory could I also
say a Vector is possibly more performant than an equivalent list?
Ken
On Thursday, October 27, 2016 at 12:58:06 PM UTC-4, Jon Zeppieri wrote:
> On Thu, Oct 27, 2016 at 12:16 PM, Ken MacKenzie wrote:
> This is a ques
On Thu, Oct 27, 2016 at 12:16 PM, Ken MacKenzie
wrote:
> This is a question more about the footprint of each. Deep down is a
> Struct really just syntactic sugar over a list.
Not in Racket (or in most Lisps these days).
> As in most things in Lisp from my understanding are all just lists, i
Hi Matthias,
Thanks. I'll look into your suggestion.
For the moment, when I see an unwanted link,
I change the name of the local variable
to one not found in the help desk for any module I import.
Thanks again, Jos
-Original Message-
From: Matthias Felleisen [mailto:matth...@ccs.neu.edu]
This is a question more about the footprint of each. Deep down is a Struct
really just syntactic sugar over a list. As in most things in Lisp from my
understanding are all just lists, it is the basic building block of all data.
Is a struct also just a list and the element names enumerations o
As a confirmation was part of my upgrades this morning in trusty.
On Thursday, October 27, 2016 at 11:01:01 AM UTC-4, asumu wrote:
> Hi folks,
>
> The Ubuntu PPA should now be updated for v6.7:
>
> https://launchpad.net/~plt/+archive/ubuntu/racket
>
> It should be available for precise, trust
This looks like an import conflict.
In 6.7, we added a `vector-sort!` function to `racket/vector`. There was
already one in `rnrs/sorting-6`. So if your program requires both
libraries, you will have a conflict.
You can resolve the conflict by looking for places where you require
`rnrs/sorting-6`
Hi folks,
The Ubuntu PPA should now be updated for v6.7:
https://launchpad.net/~plt/+archive/ubuntu/racket
It should be available for precise, trusty, xenial, yakkety, and zesty though
I've only tested it on yakkety.
(sorry if you get this e-mail twice, the mailing list ate my first e-mail
a
> On Oct 27, 2016, at 5:34 AM, Jos Koot wrote:
>
> Consider:
> #lang scribble/manual
> @(require (for-label racket) scribble/eval))
> @interaction[(let ((add1 sub1)) (add1 1))]
> In the produced HTML file the locally bound variable 'add1'
> is linked (in blue) to the docs of Racket's procedur
Great news, especially the integrated Android support.
However, I get this for one of my programs:
module: identifier already imported from a different source in:
vector-sort!
rnrs/sorting-6
racket/gui
But what's worse, it doesn't show where the bug occurs, even though debugging
is switch
At Wed, 26 Oct 2016 15:16:03 -0400, David Storrs wrote:
> On Wed, Oct 26, 2016 at 2:30 PM, Matthew Flatt wrote:
> > At Wed, 26 Oct 2016 14:01:15 -0400, David Storrs wrote:
> >> What is "-l-" ? (That's an "ell", right? Not a 1 / pipe /
> >> etc.) I would have expected a space between the -
I'm excited by the ability to use authentication-required git repositories
with the package system.
> - The package system supports authentication when installing packages
> from git, using the `raco pkg config git-checkout-credentials`
> configuration option.
>
What is the value to be provide
Consider:
#lang scribble/manual
@(require (for-label racket) scribble/eval))
@interaction[(let ((add1 sub1)) (add1 1))]
In the produced HTML file the locally bound variable 'add1'
is linked (in blue) to the docs of Racket's procedure 'add1'.
The same problem with @racket[...]
I can avoid this by
in case someone finds this useful :)
hi vincent,
how are you?
i would like to ask you this , i'm trying to mass produce definitions, however
`eval is tricky:
(define l1 (list 'a 'b))
(define l2 (list (list 1 2) (list 3 4)))
(for ([i (in-list l1)] [j (in-list l2)]) (eval `(de
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