Question

I started to really like C#’s ?? operator. And I am quite used to the fact, that where there is something handy in some language, it’s most probably in Perl too.

However, I cannot find ?? equivalent in Perl. Is there any?

Answer 1

As of 5.10 there is the // operator, which is semantically equivalent if you consider the concept of undef in Perl to be equivalent to the concept of null in C#.

Example A:

my $a = undef;
my $b = $a // 5;  # $b = 5;

Example B:

my $a = 0;
my $b = $a // 5;  # $b = 0;