Nodejs Array Count calculateCount()

Method Source Code

//Extending the Array Object to add it a new function called "calculateCount"
Array.prototype.calculateCount = function() {
    return this.length;
};


//////PROGRAM////
var a = ["1", "2"];
var count = a.calculateCount();
console.log(count);/*  w  ww. j a v  a  2  s  .  co  m*/

Related

1. countCattle(cattle)

   Array.prototype.countCattle = function(cattle){
     var number = 0;
     for(var i = 0; i < this.length; i ++){
       if(this[i].type == cattle){
         number ++ ;
     return number;
   };
   ...
   

2. countCattle(kind)

   Array.prototype.countCattle = function(kind) {
     var numKind = 0;
     for (var i = 0; i<this.length; i++) {
       if (this.type == kind){
         numKind++;
     return numKind;
   };
   ...
   

3. countCattle(kind)

   Array.prototype.countCattle = function(kind) {
     var numKind = 0;
     for (var i = 0; i < this.length; i++) {
       if (this[i].type == kind) {
         numKind++;
     return numKind;
   };
   ...
   

4. countCattle(kind)

   Array.prototype.countCattle = function (kind) {
     var numKind = 0;
     for (var i = 0; i < this.length; i++) {
       if (this[i].type == kind) {
         numKind++
     return numKind
   var canyonCows = [
     { name: "Bessie", type: 'cow', hadCalf: 'Burt'},
     { name: "Bessie", type: 'bull', hadCalf: 'Burt'},
     { name: "Bessie", type: 'cow', hadCalf: 'Burt'},
     { name: "Bessie", type: 'cow', hadCalf: 'Burt'},
     { name: "Bessie", type: 'calf', hadCalf: null},
   ]
   console.log(canyonCows.countCattle('cow'))
   

5. countCattle(kind)

   Array.prototype.countCattle = function(kind) {
     var numKind = 0;
     for (i in this) {
       if (this[i]["type"] == kind) numKind++;
     return numKind;
   };
   

6. countForBreeding()

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

7. countItem(item)

   Array.prototype.countItem = function (item) {
           return this.filter(function (i) {
               return i === item
           }).length;
   };
   

8. countOf(pValue)

   Array.prototype.countOf = function (pValue){
       var count   = 0;
       var lArray  = this || [];
       var lLength = lArray.length
       for (var i = 0 ; i < lLength; i++){
           if (lArray[i] == pValue){
               count++;
       return count;
   

9. countType(type)

   Array.prototype.countType = function (type) {
     var count = 0
     for( var i = 0, x = this.length; i < x; i++) {
       if (this[i] === type) {
         count++
     return count