Suppose you have a circle, and now its area needs to be changed.
That's a requirement that would mean a new feature. Something like:
# Perl:
sub set_area_to {
my $self = shift;
my ($area) = @_;
$self->{radius} = sqrt( $area / $PI );
return;
}
# Ruby
def area= (new_area)
@radius = Math.sqrt( new_area / @@PI )
end
# Note, this means that the Ruby version allows for:
# circle.area = 22
# And it will DWIM
I fail to see the problem.
My criteria for good software:
- Does it work?
- Can someone else come in, make a change, and be reasonably certain no bugs were introduced?
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