unless 1.respond_to?(:positive?) # TODO: Remove this file when we drop support to ruby < 2.3
class Numeric
  # Returns true if the number is positive.
  #
  #   1.positive?  # => true
  #   0.positive?  # => false
  #   -1.positive? # => false
  def positive?
    self > 0
  end

  # Returns true if the number is negative.
  #
  #   -1.negative? # => true
  #   0.negative?  # => false
  #   1.negative?  # => false
  def negative?
    self < 0
  end
end

class Complex
  undef :positive?
  undef :negative?
end
end
