perlquestion puterboy I am using unpack to unpack an element that consists of a 32 byte hex string plus an optional unsigned integer. If the integer exists, I want to join the 2 with an underscore.<br><br> I tried: <code> join("_", unpack("H32V*", $string)); </code> but it always performs the join even if there is no second element. Adding an intermediate assignment, made it work: <code> my @temp = unpack("H32V*", $string); join("_", @temp); </code> But that seems kludgy and I would like to avoid it. So, is there any way to properly cast/assign the result of unpack so that an undefined second element is ignored by join without using an intermediate variable? <br><br>