5. Postfix Modifiers (Chapter 6)

Damian advocates limited use of postfix modifiers.

Good:

    next LOOP if m{some condition met}xms;

Bad:

    $n++,print $n for 1..10;

    print $n while ++$n < 10;

    $x = 1 if $x < 10;

Basically, only use postfix modifiers for flow control, specifically, with the keywords next, last, redo, return, goto, die, croak, or throw.