Search notes:
Perl module UNIVERSAL
UNIVERSAL is the class from which all other
blessed objects derive.
It provides the following methodes:
#!/usr/bin/perl
use warnings;
use strict;
use UNIVERSAL;
my $universal = {};
bless $universal, 'UNIVERSAL';
printf "isa : %d\n", $universal->isa('foo');
printf "isa : %d\n", $universal->isa('UNIVERSAL');
printf "DOES: %d\n", $universal->DOES('foo');
printf "DOES: %d\n", $universal->DOES('UNIVERSAL');
printf "can: %d\n", $universal->can('can');
printf "can: %d\n", $universal->can('isa');
printf "can: %d\n", $universal->can('buy') // 0;
printf "VERSION: %s\n", $universal->VERSION();