# File lib/backports/1.8.7/enumerable/minmax_by.rb, line 7
    def minmax_by
      return to_enum(:minmax_by) unless block_given?
      min_object, min_result = nil, Backports::MOST_EXTREME_OBJECT_EVER
      max_object, max_result = nil, Backports::MOST_EXTREME_OBJECT_EVER
      each do |object|
        result = yield object
        min_object, min_result = object, result if min_result > result
        max_object, max_result = object, result if max_result < result
      end
      [min_object, max_object]
    end