Hi:
I'm having some hard time understand perl closure:
Here's an explanation from Intermediate Perl:
"The kind of subroutine that can access lexical variables that existed at
the time we declare it is called a closure .....In Perl terms, a closure is
just a subroutine that references a lexical variable that has gone out of
scope".
and here is the sample code:
use File::Find;
my $total_size = 0;
find (sub {$total_size += -s if -f},'.');
print $total_size, "\n";
My question is "$total_size" is not out of scope since it is declared
before "find(sub.." right?
Can we say closures are anonymous coderefs that acesses a pre declared
variable?
Thanks in advance.
Ludwig
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