note tye <p> Comparing: </p><c> ( list ) x!! cond ( grep cond, list ) cond ? ( list ) : () </c><p> I think I'd rather "reuse" the well-known [grep] for this case than adopt the more cryptic idiom you've invented. For your example case, I much prefer something that uses: </p><c> join '/', grep defined $_, ... </c><p> Rather than repeating most of the terms twice (and repeating x!! and [defined]). </p> <div class="pmsig"><div class="pmsig-22609"><p align="right"> - [tye]<tt> &nbsp; &nbsp; &nbsp; &nbsp;</tt> </p></div></div> 564792 564792