Martin DeMello wrote:
> Shouldn't that be
> 
> def <=>(other)
>   a = (self.freq <=> other.freq)
>   a.nonzero? ? a : (other.time <=> self.time)
> end
> 
> since calling nonzero? collapses [-1,1] to 'true'.

That was my gut reaction at first but:
$ ruby1.8 -v -e "p( -5.nonzero?, 5.nonzero?, 0.nonzero? )"
ruby 1.8.0 (2003-08-04) [i686-linux]
-5
5
nil

That is the beauty of only nil and false being false...

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