David Baird wrote:
No, the 'reference' to the lexical variable doesn't need to be a 'Perl
reference', just some mention of the variable in the code. That will
make it stick around, but only within the lexical scope specified.
David is correct. This is called a closure. Any use of a lexical
variable declared OUTSIDE of the scope of the sub where you use it will
make it permanent for that sub. Read up on closures for more.
Here's an example:
my $counter = 1;
sub print_counter {
print $counter;
$counter++;
}
The $counter variable will never go out of scope for this sub.
- Perrin
