Why not split the string into chunks delimited by AAA, and then combine the chunks as you want and join them back?As in:

#!/usr/bin/perl -w

use strict;

my $string = shift || 'AAABCDAAADCBAAABBDAAA';
my @between = split /AAA/, $string, -1;
pop @between;
shift @between;

for (my $i = 0; $i<@between; $i++) {
    for (my $j = $i; $j<@between; $j++) {
        print join "AAA", "", @between[ $i .. $j ], "\n"
    };
};

[download]

This won't solve the problem if your string contains AAAA, though.

UPDATE: This substr-based solution is much better, it doesn't suffer from AAAA problem and probably uses less memory, too.

In reply to Re: Perl Pattern Matching & RegEx's by Dallaylaen
in thread Perl Pattern Matching & RegEx's by jaiieq

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