Added note on the style thing.. becareful with &&, it has a low high* enough precedence that it gets interpreted early. From perlop...

As more readable alternatives to `&&' and `||' when used for control flow, Perl provides `and' and `or' operators (see below). The short- circuit behavior is identical. The precedence of "and" and "or" is much lower, however, so that you can safely use them after a list oper- ator without the need for parentheses:

Update:* Tnx davido for the correction.