Nodejs Array Count countOf(pValue)

Method Source Code

Array.prototype.countOf = function (pValue){
    var count   = 0;
    var lArray  = this || [];
    var lLength = lArray.length
    /*from w ww. jav a 2 s  .c  o  m*/
    for (var i = 0 ; i < lLength; i++){
        if (lArray[i] == pValue){
            count++;
        }
    }
    
    return count;
}

Related

1. 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'))
   

2. countCattle(kind)

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

3. calculateCount()

   Array.prototype.calculateCount = function() {
       return this.length;
   };
   var a = ["1", "2"];
   var count = a.calculateCount();
   console.log(count);
   

4. countForBreeding()

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

5. countItem(item)

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

6. 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
   

7. element_count()

   Array.prototype.element_count = function(){
     var count = 0;
     for(var i=0; i<this.length; i++){
       if(this[i] != undefined){
         count++;
     return count;
   

8. first_n(count)

   Array.prototype.first_n=function(count) {
     var a=[];
     for(var i=0;i<count;i++) {
       a.append(this[i]);
     return a;
   

9. valueCount(value)

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