I've never been a fan of unless blocks (as opposed to the unless postfix, which is a bit easier to swallow). The lower precedence spelled out boolean operators

I've never been a fan of unless blocks (as opposed to the unless postfix, which is a bit easier to swallow). The lower precedence spelled out boolean operators (not/and/or) mean you can just use if not instead, which is just as readable in most cases and isn't confusing in the else case. e.g. unless ( $foo ) { } if ( not $foo ) { }