Constructor Arguments

Sometimes an object cannot be created  without some initialization data.  A constructor can be defined to take arguments to be used as initialization data:

    sub new {
      my ($class, $foo, $bar) = @_;
      return bless {foo => $foo, bar => $bar}, $class;
    }

Will allow a new Foo::Bar object to be constructed with its foo and bar data members properly initialized:

    $object = Foo::Bar->new("my foo", "my bar");