Or as another alternative:
sub method {
my $self = shift;
my $i = shift;
my $old = $self->{B}[$i];
$self->{B}[$i] = shift if @_;
$old;
}
I tend to hate magic numbers. What if you decide later that there should
be another parameter between $self and $i?
-- Randal L. Schwartz, Perl hacker
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