Is there a difference between Perl's shift versus assignment from @_ for subroutine parameters?

Question

Let us ignore for a moment Damian Conway\'s best practice of no more than three positional parameters for any given subroutine.

Is there any difference between the t

Answer 1

I prefer

sub factorial{
  my($n) = @_;

  ...

}

For the simple reason that Komodo will then be able to tell me what the arguments are, when I go to use it.