On Nov 2, Etienne Marcotte said:
>check out http://www.crusoe.net/~jeffp/articles/pm/2000-05.html
>
>a really good document on closures...
Before I get a barrage of "BUT THAT'S NOT A CLOSURE!" let me say this. I
was told that by someone (can't remember who), and I asked merlyn (Randal)
what he thought (right, Randal?) and he said that a function like:
{ # $name exists ONLY in this block
my $name = "Jeff"; # $name is lexically scoped
sub whoami { $name } # we use the lexical $name here...
} # $name goes out of scope
can be called a closure. I feel that "closure" refers more to the action,
and less to the means -- we are creating a subroutine (named or unnamed
makes no difference) which holds on to variables that "should" be gone.
--
Jeff "japhy" Pinyan [EMAIL PROTECTED] http://www.pobox.com/~japhy/
RPI Acacia brother #734 http://www.perlmonks.org/ http://www.cpan.org/
** Look for "Regular Expressions in Perl" published by Manning, in 2002 **
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