note moritz <blockquote>Now, my real question is: How can you create a function that would act like the "exists" function?</blockquote> <p>I'd be happy to be proven wrong, but I'd say you can't. At least not in pure Perl. Maybe with XS code when you hook into the parser.</p> <p>In some cases you can [doc://tie] variables, in which [doc://exists] will call your <c>EXISTS</c> method. But depending on what you actually want to achieve, that might not be a good solution.</p> <p>So, in the spirit of [XY Question], what is the larger problem your are trying to solve?</p> <!-- Node text goes above. Div tags should contain sig only --> <div class="pmsig"><div class="pmsig-616540"> [http://perl6.org/|Perl 6 - the future is here, just unevenly distributed] </div></div> 989548 989548