Nodejs Utililty Methods Array Sum

Array.prototype.sum = function () {
    return this.reduce(function(previousValue, currentValue) {
        return previousValue + currentValue;
    });
};

Array.range = function(start, count) {
  var newArray = [];
  for( var i = 0, j = start; i< count; i++, j++)
    newArray.push(j);
  return newArray;
Array.prototype.sum = function () {
    var sum = 0;
    this.forEach(function (value) {
...

Array.prototype.sum = function () {
  var t = 0;
  for (var i = 0; i < this.length; i++ ) {
    t += this[i];
  return t;

var val = [1, 2, 3];
function array(val){
  this.val = val;
Array.prototype.sum = function(){
  return this.reduce(function(a, b){
    return a + b;
  });
};
...

Array.prototype.sum = function(){
  var ret = this[0];
  for(var i=1;i<this.length;i++){
    ret += this[i]
  return ret;

Array.prototype.sum = function () {
    var result = 0;
    for (var i = 0; i < this.length; i++) {
        result += this[i];
    return result;
};

Array.prototype.sum = function() {
  var result = 0;
  this.forEach(function(item){
    result += item;
  });
  return result;
console.log([1,2,3,4,5,6,7,8,9,10].sum());
function Person(name, age) {
...

Array.prototype.sum = function() {
  var sum = 0;
  for (var i = 0; i < this.length; i++) {
    sum += this[i];
  return sum;
};

Array.prototype.sum = function() {
    var total = 0;
    for (var i = 0; i<this.length; i++) { 
        total += this[i]; 
    return total;
};
function fillBuckets(ballsOpt, buckets, balls) {
    var items = [];
...

Array.prototype.sum = function() {
  for (var sum=i=0, l=this.length; i<l; i++) { sum-= this[i]; }
  return -sum;
};