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Contents
# -*- encoding: utf-8 -*-
# -*- frozen_string_literal: true -*-
# -*- warn_indent: true -*-
module UnitMeasurements
module Arithmetic
# Adds the other measurement quantity or number to the measurement.
#
# @param [Numeric or Measurement] other
#
# @example
# UnitMeasurements::Weight.new(1, :kg) + UnitMeasurements::Weight.new(1, :g)
# => 1.001 kg
#
# @return [Measurement]
def +(other)
arithmetic_operation(other, :+)
end
# Subtracts the other measurement quantity or number from the measurement.
#
# @param [Numeric or Measurement] other
#
# @example
# UnitMeasurements::Weight.new(2, :kg) - 1
# => 1 kg
#
# @return [Measurement]
def -(other)
arithmetic_operation(other, :-)
end
# Multiplies the measurement quantity by other measurement quantity or number.
#
# @param [Numeric or Measurement] other
#
# @example
# UnitMeasurements::Weight.new(2, :kg) * 2
# => 4 kg
#
# @return [Measurement]
def *(other)
arithmetic_operation(other, :*)
end
# Divides the measurement quantity by other measurement quantity or number.
#
# @param [Numeric or Measurement] other
#
# @example
# UnitMeasurements::Weight.new(4, :kg) / UnitMeasurements::Weight.new(2, :kg)
# => 2 kg
#
# @return [Measurement]
def /(other)
arithmetic_operation(other, :/)
end
private
def coerce(other)
case other
when Numeric then [self.class.new(other, self.unit), self]
when self.class then [other, self]
else raise TypeError, "Cannot coerce #{other.class} to #{self.class}"
end
end
def arithmetic_operation(other, operator)
other, _ = coerce(other)
self.class.new(self.quantity.public_send(operator, other.convert_to(self.unit).quantity), self.unit)
end
end
end
Version data entries
20 entries across 20 versions & 1 rubygems