http://www.perlmonks.org?node_id=301427


in reply to Perl Idioms Explained - && and || "Short Circuit" operators

It's worth mentioning that the low precedence operators and and or work the same way, differing from && and || only in their precedence. The low precedence is useful in common idioms like parenthesis-free my $pid = open my $fh, '-|', '/path/to/cmd' or die $!;.

After Compline,
Zaxo