http://www.perlmonks.org?node_id=1212189

gabrielsousa has asked for the wisdom of the Perl Monks concerning the following question:

i need an array only with the difference between two arrays.
in perl 5.10

@diff = grep { ! ({ $_, 0 } ~~ @inst) } @insttab;

how i do it without Smart Matching ? in perl 5.8