You could also match against non-zero bytes/characters, i.e. [^\0]. In case of overlap there will be one or more non-zero bytes. 

print +(($bv1 & $bv2) =~ /[^\0]/ ? "overlap\n" : "don't overlap\n");

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In reply to Re: comparing bit vectors by almut
in thread comparing bit vectors by citromatik

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