two-sum/two-sum.js

Computes a non-overlapping sequence representing the sum of two floating point numbers.

"use strict"

module.exports = fastTwoSum

function fastTwoSum(a, b, result) {
	var x = a + b
	var bv = x - a
	var av = x - bv
	var br = b - bv
	var ar = a - av
	if(result) {
		result[0] = ar + br
		result[1] = x
		return result
	}
	return [ar+br, x]
}