in reply to Index number repeating in for loop
...or simply...
print "'F' is at index: $_\n" for grep { $text[$_] eq 'F' } 0 .. $#text;
List::MoreUtils provides a sugary alternative, "indexes":
use List::MoreUtils qw( indexes ); # ... print "'F' is at index: $_\n" for indexes { $_ eq 'F' } @text;
This is a case where I prefer grep because what it's doing isn't unclear or awkward enough to justify the module (imho).
Dave
In Section
Seekers of Perl Wisdom