why does it need to be in a regexp? Sounds like you just want a string comparator, unless you have more complex patterns in mind.
$str = 'PolarBear';
my @str = split//,$str;
my @pats = qw(polarbear Polerbear Polarbeer);
for (@pats) {
my @mat = mismatches($_,$str);
print "Mismatches for $_ vs $str: @mat\n";
}
sub mismatches
{
my ($p1,$p2) = @_;
my @foo = split//,$p1;
my @str = split//,$p2;
my @pos;
if ($#foo > $#str) {
for (0 .. $#foo) {
push @pos, $_ if $foo[$_] ne $str[$_];
}
} else {
for (0 .. $#str) {
push @pos, $_ if $foo[$_] ne $str[$_];
}
}
return @pos;
}
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