From: Joel Pearson <lists@...>
Date: 2013-06-18T00:56:10+09:00
Subject: Re: Comparing objects

You can define the method <=> to allow comparison between objects.

def <=> other
  bar <=> other.bar
end

or maybe something like this?

def <=> other
  ( bar + baz ) <=> ( other.bar + other.baz )
end

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