use strict;
use Data::Dumper;
use List::MapMulti 'iterator_multi';

my @userDefined = qw(AAA AAC ACA CAA);
my $string      = 'AAAAA AAACACA CAACAAA';

my %results = map { $_ => 0; } @userDefined;

my $iter = iterator_multi [0..length($string)-1], [1..length($string)]
+;
while (my ($start, $end) = $iter->())
{
    next unless $end > $start;
    my $substr = substr $string, $start, ($end - $start);
    $results{$substr}++ if exists $results{$substr};
}

print Dumper \%results;

[download]
perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

In reply to Re: Regex: finding all possible substrings by tobyink
in thread Regex: finding all possible substrings by ssc11008

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