Another reason that, even despite sharing a lot of syntax with PHP, Hack is one of my favorite languages: http://docs.hhvm.com/manual/en/hack.nullable.php http

Another reason that, even despite sharing a lot of syntax with PHP, Hack is one of my favorite languages: http://docs.hhvm.com/manual/en/hack.nullable.php http://docs.hhvm.com/manual/en/hack.nullable.php