compare_mutiple.rb

class Fixnum
  def <(right)
    super ? right : nil
  end

  def >(right)
    super ? right : nil
  end

  def >=(right)
    super ? right : nil
  end

  def <=(right)
    super ? right : nil
  end
end

class Bignum
  def <(right)
    super ? right : nil
  end

  def >(right)
    super ? right : nil
  end

  def >=(right)
    super ? right : nil
  end

  def <=(right)
    super ? right : nil
  end
end

class Float
  def <(right)
    super ? right : nil
  end

  def >(right)
    super ? right : nil
  end

  def >=(right)
    super ? right : nil
  end

  def <=(right)
    super ? right : nil
  end
end

class NilClass
  def <(right)
    right.is_a?(Numeric) ? nil : super
  end

  def >(right)
    right.is_a?(Numeric) ? nil : super
  end

  def >=(right)
    right.is_a?(Numeric) ? nil : super
  end

  def <=(right)
    right.is_a?(Numeric) ? nil : super
  end
end

if 1 < x < 10
  puts '1 < x < 10'
end