On Tue, Feb 01, 2005 at 03:50:50PM -0800, Stewart Stremler wrote:
> > LISP trades slighly increased complexity
> > relative to Python for supreme Jedi powers that you won't find anywhere
> > else... namely something called 'macros'. (No I don't mean #define
> > type macros like in C... Those are similar in /name/ only.)
> I thought it was "closures".
no.
closures are something completely different.
closures are local functions that reference surrounding variables:
function prefix(string arg)
{
string outside = arg+" ";
function closure = lambda(string in){ write(outside+in); };
return closure;
}
// use prefix() like this:
function write_kplug = prefix("the kernel panic linux user group");
// and now
write_kplug("is great");
// will produce: "the kernel panic linux user group is great"
the above is pike. python (and of course lisp) and a number of other
languages also do support closures.
greetings, martin.
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Martin B�hr http://www.iaeste.or.at/~mbaehr/
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