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Burned by precedence rules

by w-ber (Hermit)
on Dec 23, 2008 at 13:15 UTC ( #732286=perlmeditation: print w/ replies, xml ) Need Help??

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  1. or download this
    sub done {
        my $self = shift;
        return not $self->foo and not $self->bar; # gotcha!
  2. or download this
        (return not $self->foo) and not $self->bar;
  3. or download this
    sub done {
        my $self = shift;
        return !$self->foo && !$self->bar; 
  4. or download this
        my $bool = 1 and 0;
        # $bool == 1 and $_ == 0; may not be what you expect!

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