Are Perl subroutines call-by-reference or call-by-value?

Question

I\'m trying to figure out Perl subroutines and how they work. From perlsub I understand that subroutines are call-by-reference and that an assignment (like my(@copy) =

Answer 1

Firstly, you are confusing the @ sigil as indicating an array. This is actually a list. When you call Change(@a) you are passing the list to the function, not an array object.

The case with the hash is slightly different. Perl evaluates your call into a list and passes the values as a list instead.