On Sep 2, Noel Welsh wrote:
On Sat, Aug 28, 2010 at 5:34 PM, Eli Barzilay e...@barzilay.org wrote:
I (finally) read this and the thread that went on at the time, and
I don't see any point in all of this, besides a vage plea to
encourage tests, and a slightly more concrete (but impractical)
On Thu, Sep 2, 2010 at 11:57 AM, Eli Barzilay e...@barzilay.org wrote:
Well -- you do, in a sense. When something is broken, someone needs
to fix it. There's tons of stuff that is (or has) bitrotting away
since there's no proper owner to take care of some code, or bugs in
code with no clear
On Sep 2, Noel Welsh wrote:
On Thu, Sep 2, 2010 at 11:57 AM, Eli Barzilay e...@barzilay.org wrote:
Well -- you do, in a sense. When something is broken, someone
needs to fix it. There's tons of stuff that is (or has)
bitrotting away since there's no proper owner to take care of some
Why doesn't 2htdp/universe use double-buffering?
--- nadeem
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It sounds like there is also a performance problem there too. If you
don't mind supplying a program for us to play with to see if we can do
better, that would be helpful (but no promises ).
Robby
On Thu, Sep 2, 2010 at 8:15 AM, Nadeem Abdul Hamid nad...@acm.org wrote:
Why do you think it
What happens if you restart drracket and try the same program again?
(If the double buffering appears to come back I think I know what
happened.)
Robby
On Thu, Sep 2, 2010 at 8:15 AM, Nadeem Abdul Hamid nad...@acm.org wrote:
Why do you think it doesn't?
(I'm assuming you mean: What makes me
Match is fantastic, and sometimes you want finer control over the error
messages. This morning I whipped up a match/fail* macro, which successively
matches against a sequence of patterns, and allows you to specify a separate
fail message for each layer.
It's a simple macro, and I give a use of
http://docs.racket-lang.org/drracket/extending-drracket.html?q=teachpack#(part._teachpacks)
-
As an example, the following teachpack provides a lazy cons
implementation. To test it, be sure to save it in a file named
lazycons.ss.
...
Then, in this program:
...
the list all-nums is bound
I am getting the following error... And this is the only message I get...
SIGSEGV MAPERR si_code 1 fault on addr 0xfffc
This often means 0xfffc isn't getting marked, and was prematurely
freed
Aborted
What does it mean? Has anyone seen this?
If you want to take a look at
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