Here you can find the source of sum()
Array.prototype.sum = function() { return this.reduce(function(prev, curr) { return prev + curr; });/*from w ww. j ava2 s .c o m*/ }; module.exports = Array.prototype.sum;
Array.prototype.sum=function(){ var suma; for(var i=0;i<this.lenght;i++){ suma=suma+this[i]; return suma;
Array.prototype.sum = function () { let s = 0; for (let i = 0; i < this.length; i++) { s += this[i]; return s; };
Array.prototype.sum = function() { var sum = 0; for (var i = 0, l = this.length; i < l; i++) { sum += this[i]; return sum; };
Array.prototype.sum = function () { var sum = 0; for (i = 0; i < this.length; i++) { sum += this[i] return sum
Array.prototype.sum = function() { var res = 0; for(var p in this) res += this[p]; return res; }; var s = [1, 2, 3].sum();
Array.prototype.sum = function() { var res = 0; for(var p in this) res += this[p]; return res; }; var a = [1, 2, 3]; console.log(0 in a);
Array.prototype.sum = function() { var res = 0; for(var i=0;i<this.length;++i) res += this[i]; return res; }; var s = [1, 2, 3].sum();
Array.prototype.sum = function () { var sum = 0; for (var i = 0; i < this.length; i++) { sum += this[i]; }; return sum; console.log([1, 3, 12, 33, 2].sum());
Array.prototype.sum = function () { var length = this.length; var total = 0; for (var i = 0; i < length; i++) { total += this[i]; return total; };