Why Not a Module to Get Information from Lists?

• With a module, I could get a cleaner interface:

      use List::Compare;
      $lc = List::Compare->new(\@master, \@sources);
  
      $subset_status = $lc->is_LsubsetR();

• But why stop at just subset relationships? How about these:

      @intersection           = $lc->get_intersection();
      @union                  = $lc->get_union();
      @unique                 = $lc->get_unique;
      @complement             = $lc->get_complement();
      @symmetric_difference   = $lc->get_symmetric_difference;

  Perl Cookbook uses seen-hashes to derive these relationships between 2 lists.

• Brainstorm: If I modularized this code, I'd never have to re-type it in a script.