Thank you David and Alexis for the helpful answers.
Deyaa
On Thu, Dec 29, 2016 at 2:17 AM, Alexis King wrote:
> David’s explanation is good. Let me add a little bit more context. It is
> a common mistake to think that ' can be used as a shorthand form of the
> `list` function, but this is not t
David’s explanation is good. Let me add a little bit more context. It is
a common mistake to think that ' can be used as a shorthand form of the
`list` function, but this is not the case. The quote form is a
primitive, and it has very specific (if fairly simple) behavior with
respect to evaluation.
Hi Deyaa,
> I wonder why (list->set '('1)) evaluates to (set ''1) instead of (set '1).
> I use Racket v6.7.
The expression
'('1)
is a shorter way of writing
(quote ((quote 1)))
The value of (quote x) is x, so the value of that is the list containing
(quote 1), or ((quote 1)). In other
Hi,
I wonder why (list->set '('1)) evaluates to (set ''1) instead of (set '1).
I use Racket v6.7.
Thanks!
Deyaa
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t
Hi! I'm translating a R6RS Scheme program to Racket, and I have a question
about the best "Racket-ese" translation for Scheme's `define-record-type'.
Consider the following R6RS definition:
-
(define-record-type racr-specification
(fields (mutable specification-phase) rules-table (mutabl
There's also this:
(query-rows db
"
SELECT column_name
FROM information_schema.columns
WHERE table_schema = 'your_schema'
AND table_name = 'your_table'
")
On Wed, Dec 28, 2016 at 12:46 PM, Philip McGrath
wrote:
I started with Ryan's code from `~r` and tried to emulate some special
cases I see the C code (and didn't worry about negative numbers) and
ended up with something 4-5x slower than the C code version. :( Code
follows.
Robby
#lang racket
(define (number->string* N)
(cond [(zero? N)
(st
Thanks for the recommendation!
/Jens Axel
2016-12-28 19:21 GMT+01:00 David Vanderson :
> On Wed, Dec 28, 2016 at 11:40 AM, Jens Axel Søgaard > wrote:
>
>> Below is what works for me (this is just for the archives).
>> When run the program prints this warning/info which I assume it is ok to
>
On Wed, Dec 28, 2016 at 11:40 AM, Jens Axel Søgaard
wrote:
> Below is what works for me (this is just for the archives).
> When run the program prints this warning/info which I assume it is ok to
> ignore.
>
> GL context changed
> You are using OpenGL '(4 1) with gl-backend-version of 3.3
Something like this would be really good. I also, relatively recently,
discovered the "name" fields when I happened to look at a rows-result
directly, and being able to work with columns by name rather than by
position is much better. I guess I should have realized there was some way
of doing this,
Below is what works for me (this is just for the archives).
When run the program prints this warning/info which I assume it is ok to
ignore.
GL context changed
You are using OpenGL '(4 1) with gl-backend-version of 3.3
'#(#(400.0 400.0) #(0.945 0.945) #(378.0 378.0) #(378.0 378.0) #(40
> On Dec 28, 2016, at 6:06 AM, Michael Rossi wrote:
>
> couldn't you simply add all three code layout options and then add a
> commandline switch in scribble when generating html? I.e. by default, do
> nothing with the code. Otherwise, add switches to either wrap the code or
> else put it in
For the last few years, I’ve believed that there was no way to get the column
names of tables using the db interface. Today I discovered that—using both
postgresql and sqlite3, at least—I can extract these from the “name” fields of
the “headers” field of the row-response to a “SELECT * FROM tabl
On Wed, Dec 28, 2016 at 5:57 AM, Jens Axel Søgaard
wrote:
> That example is quite involved. It doesn't show how to get things going
> without using chaos.
I suggest looking at lux/chaos/gui for how to get a canvas.
> If I use (require mode-lambda/backend/gl) instead of (require
> mode-lambda/bac
On Tue, Dec 27, 2016 at 10:55:45PM -0500, George Neuner wrote:
> On Tue, 27 Dec 2016 22:23:49 +, Philip McGrath
> wrote:
>
> >Has something changed recently in the CSS for the Racket documentation? I
> >thought that formerly the phone layout was equivalent to what happens if
> >you manually r
On Wed, Dec 28, 2016 at 12:08 AM, Matthew Butterick wrote:
> FWIW Racket's own `~r` function already accepts radixes (radices? radishes?)
> up to 36.
Ah, good point! I think it makes a lot of sense to do exactly what it
does (or, if people find useful things, something more (but maybe not
someth
Hey all,
I noticed that Ctr+F based searching is kind of uncomfortable on the new
website. Namely, if I am searching for a word that is located below one of
the images, it gets highlighted like you would expect, but the image
doesn't actually disappear. Thus I need to play whack-a-mole to find the
On Wednesday, December 28, 2016 at 12:00:24 AM UTC-6, Matthew Butterick wrote:
> Google's policy is coercive and awful. But even if it weren't, the practical
> problem is that code samples don't shrink well because they can't be
> line-wrapped. [1]
>
>
> [1] https://github.com/racket/scribble/p
That example is quite involved. It doesn't show how to get things going
without using chaos.
If I use (require mode-lambda/backend/gl) instead of
(require mode-lambda/backend/software)
and use a bitmap with gl backing like this:
(define draw (rendering-states->draw lc (list fish-sprite
lanter
Le mercredi 28 décembre 2016 07:00:24 UTC+1, Matthew Butterick a écrit :
> If someone knows offhand where the main Scribble HTML template lives in
> `racket/scribble`, that would save me some time discovering it.
https://github.com/racket/scribble/blob/master/scribble-lib/scribble/html-render.rkt
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