Re: effects of ampersand and non ampersand when referencing a sub name

[tobyink]

Using a coderef at all bypasses prototypes. (As does calling a sub as a method.)

If you need to check the number of arguments passed to a sub, do it in the sub! Prototypes are just to help the Perl parser parse argument lists more sanely.

sub execute {
   @_==3 or croak "execute() needs three arguments!!";
   ...;
}