Nodejs Array Sum sum()

Method Source Code

Array.prototype.sum=function(){
   return this.reduce(function(s,n){return s+n})
}

// ANSWER ////from   w  w w .  j  a va2s .  c o m

var isVowel = function(chr) {
  return 'aeiou'.indexOf(chr) != -1;
}

function VowelCount(str) {
  return str.split('')
    .map(function(chr) {
      return isVowel(chr) ? 1 : 0;
    }).sum();
}

VowelCount(readline());

Related

1. sum()

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

2. sum()

   Array.prototype.sum = function(){
     "use strict";
     var count = 0;
     this.forEach(function(item){
       count += item;
     });
     return count;
   };
   

3. sum()

   Array.prototype.sum = function(){
     'use strict';
     var count = 0;
     this.forEach(function(item){
       count += parseFloat(item) || 0;
     });
     return count;
   };
   

4. 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());
   

5. sum()

   function NavBarCtrl($scope) {
       $scope.isCollapsed = true;
   function randomnumber(limite) {
       return Math.ceil(Math.random() * limite);
   function getRandomInt(min, max) {
       return Math.floor(Math.random() * (max - min + 1)) + min;
   Array.prototype.sum = function() {
       var total = 0;
       for (var i = 0, _len = this.length; i < _len; i++) {
           total += this[i];
       return total;
   };
   

6. sum()

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

7. sum()

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

8. 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());
   

9. sum()

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