TrueClass & FalseClass => Boolean Comparable hack

boolean.rb

module Boolean
  include Comparable

  # true > false
  def <=>(other)
    raise ArgumentError, "Do not know how to compare #{other.class} with TrueClass and FalseClass" unless [TrueClass, FalseClass].include?(other.class)
    other ? (self ? 0 : -1) : (self ? 1 : 0)
  end

end

TrueClass.send(:include, Boolean)
FalseClass.send(:include, Boolean)

# [1] pry(main)> true < false
# => false
# [2] pry(main)> true > false
# => true
# [3] pry(main)> true > true
# => false
# [4] pry(main)> true == true
# => true
# [5] pry(main)> false == false
# => true
# [6] pry(main)> false > false
# => false
# [7] pry(main)> false < false
# => false
# [8] pry(main)> false < true
# => true
# [9] pry(main)> true.is_a?(Boolean)
# => true
# [10] pry(main)> false.is_a?(Boolean)
# => true
# [11] pry(main)> [true, false, false, true].sort
# => [false, false, true, true]
# [12] pry(main)> [true, false, false, true].sort.reverse
# => [true, true, false, false]