On Wed, Aug 11, 2010 at 8:40 PM, Sam Tobin-Hochstadt wrote:
> On Wed, Aug 11, 2010 at 8:25 PM, Shriram Krishnamurthi
> wrote:
>>
>> - The for... forms remind me too much of do. There just don't seem to
>> be primitives with the simplicity of map/filter/fold for sequences.
>> Perhaps I'm missing
I solved my lined-box problem, and maybe `2.3 Pict Combiners' ought to
be explain it, as `Quick: An Introduction to Racket with Pictures'
uses slideshow. New racket users will likely play with slideshow, and
e.g. try a table with horiz & vert lines separating the entries.
The documentation for ta
> Personally, I find the `for' macros more concise, except when there's
> already a function that I would pass to `map' etc. Compare:
>
> (for/list ([x e]) (f x))
> (map (lambda (x) (f x)) e)
Your comparison is perhaps a bit unfair (since you've needlessly
eta-expanded the function), but I agre
On Wed, Aug 11, 2010 at 8:25 PM, Shriram Krishnamurthi
wrote:
>
> - The for... forms remind me too much of do. There just don't seem to
> be primitives with the simplicity of map/filter/fold for sequences.
> Perhaps I'm missing them.
Personally, I find the `for' macros more concise, except when
On 11.08.10 13:54, Matthew Flatt wrote:
At Tue, 10 Aug 2010 20:06:52 +0200, Jakub Piotr Cłapa wrote:
I was trying to add a GUI windows to my small Racket program for
debugging embedded systems. It was super easy and worked like charm the
first time (thanks!) but unfortunately I found great perfo
On 12.08.10 03:05, Matthew Flatt wrote:
At Thu, 12 Aug 2010 02:42:20 +0200, Jakub Piotr Cłapa wrote:
I tracked the error down to:
(ffi-lib "/Users/jpc/Sources/gr2/src/build/gracket/libs/libcairo.2")
ffi-lib: couldn't open
"/Users/jpc/Sources/gr2/src/build/gracket/libs/libcairo.2.dylib"
(dlopen
At Thu, 12 Aug 2010 02:42:20 +0200, Jakub Piotr Cłapa wrote:
> I tracked the error down to:
> > (ffi-lib "/Users/jpc/Sources/gr2/src/build/gracket/libs/libcairo.2")
> ffi-lib: couldn't open
> "/Users/jpc/Sources/gr2/src/build/gracket/libs/libcairo.2.dylib"
> (dlopen(/Users/jpc/Sources/gr2/src/bui
On 11.08.10 13:54, Matthew Flatt wrote:
At Tue, 10 Aug 2010 20:06:52 +0200, Jakub Piotr Cłapa wrote:
I was trying to add a GUI windows to my small Racket program for
debugging embedded systems. It was super easy and worked like charm the
first time (thanks!) but unfortunately I found great perfo
I would venture a guess that it's less about lists vs vectors than
bout lists and vectors versus two other things: "associations" and
"sequences".
-
Associations:
In many other scripting languages, the distinction between an object,
an association list, a dictionary, and a hash table are al
Hi,
Is there a way to add labels to arrows created with pin-arrow-line in
slideshow? Text would work, but arbitrary picts would be even better.
Thanks,
Vincent
_
For list-related administrative tasks:
http://lists.racket-lang.org/listinfo/users
I think you are mostly right. There is not an obvious operation like
the list operations for many collections. Nevertheless, we should have
good defaults for making a user's life convenience.
Jay
On Wed, Aug 11, 2010 at 4:44 PM, Deren Dohoda wrote:
> I am a novice, self-taught programmer. Please
On Thu, Aug 12, 2010 at 4:14 AM, Deren Dohoda wrote:
> 4) Well, *I* have no clue what you want, so I'll just create this view
> called a "sequence" and give you that (oh yeah it just acts like a
> list)
[...]
> they use a list in the first place?). I don't believe (4) is so much a
> "solution" a
I am a novice, self-taught programmer. Please forgive this possibly
naive question, but what's the problem? The big post I read seems to
say this one sentence: different containers are different, but they
should act the same.
But, different containers are different for a good reason.
Take a linke
On Wed, Aug 11, 2010 at 4:01 PM, Martin DeMello wrote:
> What is the racket team's stance on core support for vectors and
> hashes, in terms of syntax for literals and making containers act as
> functions of their keys? The latter, in particular, would be a huge
> win, though it would also be a pr
On Thu, Aug 12, 2010 at 12:44 AM, Shriram Krishnamurthi
wrote:
> Your library is truly impressive, but I don't think it addresses some
> of the fundamental issues that the OP talks about (availability in the
> core and not as some third-party library, integration with syntax,
> good integration o
I'm trying to implement a specification which has defined three
character tables.
These character tables together implement the ASCII character set, and
further, some special characters defined by the specification.
I've copied this table here: http://en.wikipedia.org/wiki/User:Horaced
The charac
Thank you. Yes you are right it is not in the core yet and its just
a third party library. But we would want like to move some of the
more useful ones to the core. I didn't comment about it because
I don't know what it would be eventually. So I stopped myself.
- Original Message -
From:
Your library is truly impressive, but I don't think it addresses some
of the fundamental issues that the OP talks about (availability in the
core and not as some third-party library, integration with syntax,
good integration of laziness). Maybe you could comment more
specifically, in case I've mis
We are in the process of releasing a library of functional
data structures that has been pointed out to be missing from
Racket. It will answer many concerns raised there effectively.
FYI as a first step we will be releasing it to PlaneT in next
2 to 3 days.
Hari
- Original Message
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http://programming-puzzler.blogspot.com/2010/08/racket-vs-clojure.html
Any opinions on the subject?
- --
Eduardo Bellani
omnia mutantur, nihil interit.
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I've been doing writing some glue code between Cocoa and Racket and
part of that exists as a C library that I am communicating with via
FFI, and part of it is Racket code that uses the Objective C FFI
interface.
One thing I've noticed is that if I change the C library, I need to
restart DrRacket f
At Tue, 10 Aug 2010 20:06:52 +0200, Jakub Piotr Cłapa wrote:
> I was trying to add a GUI windows to my small Racket program for
> debugging embedded systems. It was super easy and worked like charm the
> first time (thanks!) but unfortunately I found great performance
> degradation under gracket
On 10.08.10 20:06, Jakub Piotr Cłapa wrote:
The behaviour stops as soon as I remove the "sleep .001" from the shell
script (so it outputs data in big chunks). It looks to me like the event
loop and racket thread scheduling is not working very well in the GUI
version of racket.
I did some profil
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