in reply to Closure question

What you are using is a one-use closure. Because it is in a naked block it can not be used multiple times. And as broquaint points out, it must be "seen" prior to being used. Here is an example of a re-usable closure that can be used before or after the sub has been "seen".
#!/usr/bin/perl use strict; use warnings; my $count_1 = iterator( 1 ); print $count_1->(), "\n" for 1 .. 10; my $count_2 = iterator( 'a' ); print $count_2->(), "\n" for 1 .. 10; sub iterator { my $iterator = shift; return sub { $iterator++ }; }
Cheers - L~R