reasonablekeith,
Here is a clue - what happens when you forget about closures and run the following code?
#!/usr/bin/perl
use strict;
use warnings;
my $cnt = 0;
print $cnt++, "\n";
print $cnt++, "\n";
print $cnt += 10, "\n";
print $cnt++, "\n";
print $cnt++, "\n";
The ++ operator (see perlop) first retrieves the current value and then increments the value when used as post-increment.
- Start at 0
- Return 0, make $cnt 1
- Return 1, make $cnt 2
- Return 2 + 10, make $cnt 12
- Return 12, make $cnt 13
- Return 13, make $cnt 14
-
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