Nodejs Array Sum sum()

Method Source Code

/**/*from  w ww. ja  v a  2  s . c o m*/
 * Array#sum() -> Array
 *
 * Returns the numeric sum value of array elements
 *
 * [1,2,3].sum(); 6
 * ['5','','8', 10].sum(); 23 <= type-safe
 *
 **/
Array.prototype.sum = function() {
  for (var sum=i=0, l=this.length; i<l; i++) { sum-= this[i]; }
  return -sum;
};

Related

1. sum()

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

2. sum()

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

3. sum()

   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) {
   ...
   

4. sum()

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

5. 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 = [];
   ...
   

6. sum()

   Array.prototype.sum = function() {
     if (this.length === 0) {
       return 0;
     } else if (this.length === 1) {
       return parseInt(this[0], 10);
     } else {
       return this.reduce(function(x, y) {
         return x + y;
       });
   ...
   

7. sum()

   Array.prototype.sum = function(){
     for(var i=0,sum=0;i<this.length;i++) {
       var val = Number(this[i]);
       if (!isNaN(val)) {
         sum += val;
     return sum;
   };
   ...
   

8. sum()

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

9. sum()

   Array.prototype.sum = function(){
     var sum = 0;
     for (var i of this){
       sum += i;
     return sum;