module PairSee class DateCombo attr_reader :date, :devs def initialize(date, *devs) @date, @devs = date, devs end def to_s if date.nil? "#{devs.join ', '}: not yet" else "#{devs.join ', '}: #{date}" end end def <=>(other) if date && other.date date <=> other.date elsif date 1 elsif other.date -1 else 0 end end end end