Nodejs Array Count valueCount(value)

Method Source Code

Array.prototype.valueCount = function (value) {
  var count = 0;/*from w w  w  .  j av  a2 s  .  co m*/

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

Array.prototype.myUniq = function () {
  var uniqArray = [];

  for( var i = 0; i < this.length; i++) {
    if( uniqArray.valueCount(this[i]) === 0  ) {
      uniqArray[uniqArray.length] = this[i];
    };
  };

  return uniqArray;
};

Array.prototype.subsets = function () {
  if (this.length === 0) {
    return this;
  }
  var subs = [];

  for (var i = 0; i < this.length; i++) {
    subs.push(this);
    new_arr = this.slice();
    // console.log(this);
    new_arr.splice(i,1);
    // console.log(new_arr);
    // console.log(new_arr);
    subs.push(new_arr)
    // subs.concat(new_arr.subsets())
  }
  return subs.myUniq();
};
a = [1,2,3]
console.log(a.subsets());

Related

1. 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;
   

2. 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
   

3. 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;
   

4. first_n(count)

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

5. 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;
   };
   ...