What kind of syntactic sugar is available in Perl to reduce code for l/rvalue operators vs. if statements?

Question

There\'s a bunch out there, as Perl is a pretty sugary language, but the most used statements in any language is the combination of if statements and setting values. I think I\

Answer 1

There's also:

$hash{$key||'foo'} = 1;  # if($key) { $hash{$key} = 1 } else { $hash{'foo'} = 1 }