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On Sat, Oct 01, 2005 at 01:50:20AM -0700, Angus Lees wrote:
> At Thu, 29 Sep 2005 18:38:31 +1000, Oscar Plameras wrote:
> > Is their equivalent codes for ff in perl 6 ?
>
> Sure, perl6 (just as in perl5) has coderefs. In fact, these can be
> references to anonymous functions or dynamically created closures,
> which certainly can't be done in C.
Have you looked at how the mathmap plug-in for gimp works?
You type multi-dimensional equations (handling colour vectors,
space vectors, matricies, etc) then it writes out a C program
to a temp directory, compiles the program, and runs your image
through the program. Slightly scary but really no different
than doing an eval() in perl and mathmap handles chunky image
filtering with speed and ease (you don't even notice the compile
time).
Maybe that is a bit of an unfair example, a better question
would be whether the ability to not give a name to a function
is really so amazing or what makes a closure different to
a function pointer plus a data pointer. Certainly a lot of C
code is written as a function pointer plus a GLOBAL data block
(and library routines such as qsort() and bsearch() encourage
this by not providing an extra data pointer for the compar()
function) but any language can be misused.
Is global data really all that bad anyhow? At the end of the
day, something has to be global.
- Tel
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