To johngg:
it seems your code does not work at all; even if rectified to work, it is not so efficient when regex engine is involved.

My suggestion is:
sort (lexicographically) the lists first, then the search can be done in one whole pass through the two lists.

In reply to Re^2: My 'perldar' tells me there is a 'better' solution for this list operation by an0
in thread My 'perldar' tells me there is a 'better' solution for this list operation by OfficeLinebacker

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