<=>

# File lib/rss/maker/base.rb, line 757
        def <=>(other)
          _date = date || dc_date
          _other_date = other.date || other.dc_date
          if _date and _other_date
            _date <=> _other_date
          elsif _date
            1
          elsif _other_date
            -1
          else
            0
          end
        end