So very close. What you really mean to do is: 

#!/usr/bin/perl
use strict;

my $string = "CATINTHEHATWITHABAT";
my $regex = '\wAT';
my @matches = ();

while ($string =~ /($regex)/gi){
    my $match = $1;
    my $length = length($&);
    my $pos = length($`);
    my $start = $pos + 1;
    my $end = $pos + $length;
    my $hitpos = "$start-$end";
    push @matches, "$match found at $hitpos ";
}

print "$_\n" foreach @matches;

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The difference is that a foreach loop builds the list before you start, whereas the while loop re-executes the expression each time. This means that you are clobbering $& and friends at the start of your foreach loop, but using a while loop means the values are fresh.

In reply to Re: Match, Capture and get position of multiple patterns in the same string by kennethk
in thread Match, Capture and get position of multiple patterns in the same string by richardwfrancis

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