note gjb <p> <code> @interesting_lines = grep {/$string1/ xor /$string2/} @log; </code> will do nicely.</p> <p>Hope this helps, -gjb-</p> <p><strong>Update:</strong> apparently I got the question wrong, see the previous answer or for an alternative syntax: <code> @interesting_lines = grep {/$string1/ and /$string2/} @log; </code> </p> 514884 514884