http://www.perlmonks.org?node_id=564827


in reply to Secret Perl Operators: the boolean list squash operator, x!!

Two people have already done
scalar x!! $cond
but the parens are required
( scalar ) x!! $cond

>perl -le "@a = 'test' x 0; print scalar @a" 1 >perl -le "@a = ('test') x 0; print scalar @a" 0