foreach my $var (@list) -- $var is a reference?

Question

So, I never knew this and I want to get some clarifcation on it. I know if you do

foreach (@list){

if you change $_ in that loop it will affect the actual data. But, I did not know that if you did

foreach my $var1 (@list){

If you changed $var1 in the loop it would change the actual data. :-/ So, is there a way to loop over @list but keep the variable a read-only copy, or a copy that if changed will not change the value in @list?

Answer 1

Make a copy of @list in the for statement:

foreach my $var1 (() = @list) {
  # modify $var without modifying @list here
}