unless Numeric.method_defined? :neg?
class Numeric
# Checks whether a number is negative.
#
# @return [Boolean] true is the number is negative, false otherwise
#
# @example
# 5.neg? #=> false
#
# @example
# -0.5.neg? #=> true
#
# @example
# 0.neg? #=> false
def neg?
self < 0
end
end
end