Since split discards an empty trailing string (but not a leading one), one option would be to add a character to the end that can't be part of the delimiter. Then you can split and take everything except the first and last elements: 

#!/usr/bin/perl
use Modern::Perl;
my $a = 'catonecattwocatthreecatfourcat';
$a .= ' ';
my @w = split /cat/, $a;       
say "$_ -> " . length($_) for @w[1..@w-2];

one -> 3
two -> 3
three -> 5
four -> 4

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Aaron B.
My Woefully Neglected Blog, where I occasionally mention Perl.

In reply to Re^4: How can I count characters between two same substrings in a string where the substring is repeated more than 5 times? by aaron_baugher
in thread How can I count characters between two same substrings in a string where the substring is repeated more than 5 times? by supriyoch_2008

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