list_compare_polymorphism

'Under-the-hood' Polymorphism in List::Compare

Whether you wish to compare two lists or an arbitrary number of lists, the interface looks the same.

    $lc   = List::Compare->new(\@A, \@B);
    @comp = $lc->get_complement;

    $lcm  = List::Compare->new(\@A, \@B, \@C);
    @comp = $lcm->get_complement;

But since the mathematical notions of 'union', 'intersection', 'complement', etc. are quite different for three or more sets, the calculation of these relationships inside List::Compare is quite different as well.