Hi Robby -
What I am trying to do is to look up a key/value pair where the key happens
to be the procedure. The struct idea will work only if I can serialize/hash
the procedure into a unique key, which means I will still have to rely on a
procedure matching itself (otherwise it's too much work fo
yes sir :)
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thank you Noel...got it
srry for not searching well enough to find thatthis thread can now be
closed
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Are you doing double buffering? This answer is probably relevant:
http://lists.racket-lang.org/users/archive/2009-April/032035.html
HTH,
N.
On Thu, Jul 22, 2010 at 4:46 AM, Mathew Kurian wrote:
> Hey guys,
> Recently, I had started coding a game in racket and its grown a bit
> recently. Its sti
Hey guys,
Recently, I had started coding a game in racket and its grown a bit
recently. Its still just 2D/ semi 3D, but I am facing some serious
flickering when running on a linux machine. However, on a Windows it works
fine. Its about 310 MB, so its a bit hard on the memory. (not completely
optim
On 07/21/2010 07:41 PM, Stevie Strickland wrote:
On Jul 21, 2010, at 9:33 PM, Jon Rafkind wrote:
On 07/21/2010 05:26 AM, Robby Findler wrote:
One, non-optimal way to get the contracts is to evaluate the module
and use object-contract on the exports (non-optimal because dependent
contracts will
I've had the same thought.
Plus with contracts, can even be 3 times in proximity, e.g.
(define/contract (my-pony #:color [color "red"])
(() (#:color string?) . ->* . any)
which is a bit like the Department of Redundancy Department's Division
of Redundancy Division. :)
Not a very big annoyanc
That's damn cute!
On Jul 21, 2010, at 9:41 PM, Stevie Strickland wrote:
> On Jul 21, 2010, at 9:33 PM, Jon Rafkind wrote:
>> On 07/21/2010 05:26 AM, Robby Findler wrote:
>>> One, non-optimal way to get the contracts is to evaluate the module
>>> and use object-contract on the exports (non-opt
On Jul 21, 2010, at 9:33 PM, Jon Rafkind wrote:
> On 07/21/2010 05:26 AM, Robby Findler wrote:
>> One, non-optimal way to get the contracts is to evaluate the module
>> and use object-contract on the exports (non-optimal because dependent
>> contracts will have ...s in them, etc).
> `object-contrac
On 07/21/2010 05:26 AM, Robby Findler wrote:
One, non-optimal way to get the contracts is to evaluate the module
and use object-contract on the exports (non-optimal because dependent
contracts will have ...s in them, etc).
`object-contract' looks like its only for stuff from the class system,
r
You seem to be relying on identity of procedures (which is a bad
idea). Contracts on functions are implemented with wrappers which
breaks that by making fewer things equal but compiler optimizations
can take things the other direction making more things equal than you
might expect.
Overall I think
> I can't produce a more thorough answer now, but in general the whole
> uncovered expressions feature relies on expressions with a source
> indication. For example, this works as you expect:
> ...
> and it should also work for a sandbox that is created from a file.
OK, thanks, that sort of make
On Jul 21, Nadeem Abdul Hamid wrote:
> Sorry if I am missing something obvious, by why does the following
> produce '() ?
>
> (define Ev
> (parameterize ([sandbox-coverage-enabled #t])
> (make-evaluator 'lang/htdp-intermediate
> `(define (f x)
>(if
Hi all -
I am running into an interesting issue where an alist of procedures in REPL,
the ones without a contract works with assoc, but the ones with contract do
not work with assoc.
What I have is an alist where the keys are procedures. Some of these
procedures have contracts attached to them,
Sorry if I am missing something obvious, by why does the following produce '() ?
(define Ev
(parameterize ([sandbox-coverage-enabled #t])
(make-evaluator 'lang/htdp-intermediate
`(define (f x)
(if (zero? x) "zero" "non-zero"))
`(
On Jul 21, Ryan Culpepper wrote:
> You need to escape the backslash in your string:
>
>(directory-exists? "C:\\iconsource")
>
> DrRacket colors the bad string red to indicate that there's a
> problem with it. If you insert the extra backslash, it turns green.
>
> Wouldn't it be nice for DrRa
At Wed, 21 Jul 2010 12:58:48 +0100, Tim Brown wrote:
> On 21/07/10 02:20, Matthew Flatt wrote:
> > I've pushed a repair to the git repo, along with your patch to
> > "sconfig.h".
> >
> > The bug was in the code that patches a return address in the stack to
> > release cached stack-trace information
John Sampson wrote:
Hello -
If I enter "(directory-exists? "C:\iconsource")" into DrRacket
I would expect it to answer with "#t" or "'#f" but in fact the
cursor goes to the next line, leaving an indent.
I am running this on Windows 7.
As a newbie I do not understand this behaviour.
You need t
On Jul 21, 2010, at 5:22 PM, John Sampson wrote:
> Hello -
>
> If I enter "(directory-exists? "C:\iconsource")" into DrRacket
> I would expect it to answer with "#t" or "'#f" but in fact the
> cursor goes to the next line, leaving an indent.
> I am running this on Windows 7.
Do you mean you
Hello -
If I enter "(directory-exists? "C:\iconsource")" into DrRacket
I would expect it to answer with "#t" or "'#f" but in fact the
cursor goes to the next line, leaving an indent.
I am running this on Windows 7.
As a newbie I do not understand this behaviour.
Is there a tutorial on file i/o
On 07/21/2010 02:43 PM, Evan Hanson wrote:
> Makes sense. That's nice flexibility for module users.
>
> Out of curiosity, how dynamic are module names? Can they be
> manipulated? Say you had two modules that each provide a function
> "connect". You would load them as mod1:connect and mod2:connect
Parameterized modules are called 'units' and it's a different ball game. Yes,
something like this is doable. In this world, you can write
(define (f some-unit-module)
... (connect a b c) ... )
and connect comes from the 'unit module' you pass in. -- Matthias
On Jul 21, 2010, at 4:4
Yeap, that's the goal.
On Jul 21, 2010, at 4:47 PM, Jon Rafkind wrote:
> Yea sure. I was just getting the import stuff to show. If hacking contracts
> is too hard maybe I can get some advice at PLT/Racket day.
>
> On 07/21/2010 12:46 PM, Matthias Felleisen wrote:
>> Jon, do you want to give
Yea sure. I was just getting the import stuff to show. If hacking
contracts is too hard maybe I can get some advice at PLT/Racket day.
On 07/21/2010 12:46 PM, Matthias Felleisen wrote:
Jon, do you want to give it a try? And perhaps Sam and you can then figure out
how to get the types out.
O
On 07/21/2010 12:51 PM, Evan Hanson wrote:
> In an effort to learn scheme, I ported some bindings for a subset of
> the OS X CoreMIDI API from a Ruby project of mine to scheme/foreign.
> I'm posting them (a) in case anyone wants to use them, but more
> because (b) I'm hoping for some feedback. I'm
Makes sense. That's nice flexibility for module users.
Out of curiosity, how dynamic are module names? Can they be
manipulated? Say you had two modules that each provide a function
"connect". You would load them as mod1:connect and mod2:connect using
prefix-in -- how might one design a form that w
Yeah, I will if I flesh this out and put it on planet. That was more
just to make sure it works (didn't even mean to include it). Thanks
for the tip, though, rackunit looks helpful and relatively familiar in
design.
re: let/for forms -- I guess I'm just not sure what's the favored form
for a given
> On Jul 21, 2010, at 2:51 PM, Evan Hanson wrote:
>
> Also, is this the kind of thing that should be namespaced? In
> contrast to other languages where namespacing is used heavily
> (sometimes even to a fault), it seems that many scheme libraries
> are quite flat. Is this simply left up to the user
On Jul 21, 2010, at 2:51 PM, Evan Hanson wrote:
> Also, is this the kind of thing that should be namespaced? In contrast to
> other languages where namespacing is used heavily (sometimes even to a
> fault), it seems that many scheme libraries are quite flat. Is this simply
> left up to the use
On Wed, Jul 21, 2010 at 20:51, Evan Hanson wrote:
> In an effort to learn scheme, I ported some bindings for a subset of the OS
> X CoreMIDI API from a Ruby project of mine to scheme/foreign. I'm posting
> them (a) in case anyone wants to use them,
Nice! You really should put this on PLaneT, th
In an effort to learn scheme, I ported some bindings for a subset of the OS X
CoreMIDI API from a Ruby project of mine to scheme/foreign. I'm posting them
(a) in case anyone wants to use them, but more because (b) I'm hoping for some
feedback. I'm sure there are places where I could have done th
Jon, do you want to give it a try? And perhaps Sam and you can then figure out
how to get the types out.
On Jul 21, 2010, at 7:26 AM, Robby Findler wrote:
> One, non-optimal way to get the contracts is to evaluate the module
> and use object-contract on the exports (non-optimal because depend
Hi,
When using keyword arguments, I often write:
(define (foo #:some-arg some-arg) )
or:
(define (foo #:some-arg [some-arg a-value]) )
This redundancy between the keyword name and the argument name bothers me a
little each time I use it.
Would it be wrong to simplify this to:
(define (
One note, however.
When I "make install", raco does not add -m64 to either CFLAGS or LDFLAGS.
(And since I was root to install, gcc wasn't visible, either). Through a
bit of trail and error, I figured out to put them in the environment as in:
LDFLAGS=-m64 PATH=/usr/sfw/bin/:$PATH CFLAGS=-m64 gma
Matt,
I have successfully built racket for Solaris 5.10 AMD64 from git.
Thank you very much for your help.
On 21/07/10 02:20, Matthew Flatt wrote:
I've pushed a repair to the git repo, along with your patch to
"sconfig.h".
The bug was in the code that patches a return address in the stack to
One, non-optimal way to get the contracts is to evaluate the module
and use object-contract on the exports (non-optimal because dependent
contracts will have ...s in them, etc).
Robby
On Wed, Jul 21, 2010 at 4:26 AM, Matthias Felleisen
wrote:
>
> Thou shall ask and receive. Thanks!
>
> Can I get
On Jul 20, 2010, at 11:26 PM, Matthew Flatt wrote:
> Generating the variant can allocate, and therefore might trigger the
> little recycle icon in DrRacket during a garbage collection.
> Unfortunately, drawing the recycle icon would steal a resource that was
> being used to generate the variant b
Thou shall ask and receive. Thanks!
Can I get the contracts if it comes via provide/contract and/or the types if it
comes from Typed Racket (this might be the difficult one, because types are
gone after expansion).
And I think we should somehow combine provide-document with provide/contract
I recently reported a bug that sounds extremely related: (Problem
Report 11033) where empty white scenes were sometimes showing up as
black. Also on Windows.
You might want to check whether this fix addresses that bug as well,
and if so, you can close out that problem report.
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