If you're just comparing 2 strings then this should do the trick
my @pairs = ( [qw/ATCG TAGC/], [qw/ACTG TGAT/] );
print "@$_: ", (dna_compare(@$_) ? "matched" : "didn't matched"), $/
for @pairs;
sub dna_compare {
my($dna, $comp) = @_;
return !scalar grep {
(substr($dna, $_, 1).substr($comp, $_, 1))
!~ m< ^ (?: AT | TA | GC | CG ) \z >x;
} 0 .. (length($dna) - 1);
}
__output__
ATCG TAGC: matched
ACTG TGAT: didn't matched
HTH
_________ broquaint
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