Nodejs Array Sum sum()

Method Source Code

Array.prototype.sum = function () {
  return (!this.length) ? 0 : this.reduce((acc, value) => {
    return acc + value;
  });// w  w  w.  j a  va2s .com
};

Related

1. sum()

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

2. sum()

   Array.prototype.sum = function () { 
     return this.reduce(function(a, b) { 
       return a + b; 
     }, 0); 
   

3. sum()

   Array.prototype.sum = function () {
     var sum,
       i;
     sum = 0;
     for (var i = 0; i < this.length; i++) {
       sum += this[i];
     };
     return sum;
   console.log([1, 3, 12, 33, 2].sum());
   

4. sum()

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

5. sum()

   Array.prototype.sum = function () {
     return this.reduce(function (value, current) {
       return value + current;
     }, 0);
   };
   

6. sum()

   Array.prototype.sum=function(){return this.reduce(function(s,n){return s+n})}
   function NumberAddition(str) {
     return str.replace(/[^\d]/g, ' ').split(' ').map(Number).sum();
   NumberAddition(readline());
   

7. sum()

   function extend(destination, source) {
       for (var property in source) {
           destination[property] = source[property];
       return destination;
   Array.prototype.sum = function() {
       var result = 0;
       for (var i = 0; i < this.length; i++) {
   ...
   

8. sum()

   Array.prototype.sum = function() {
     var n = 0;
     this.forEach(function(e) {
       n += e;
     });
     return n;
   };
   

9. sum()

   Math.TAU = Math.PI * 2;
   Array.prototype.sum = function()
     for (var i = 0, L = this.length, sum = 0; i < L; sum += this[i++]);
     return sum;
   Array.prototype.product = function()
     for (var i = 0, L = this.length, product = 1; i < L; product =  product * this[i++]);
   ...