Nodejs Array Unique uniquelize()

Method Source Code

Array.prototype.uniquelize = function () {
    var tmp = {},
        ret = [];/*from  w  ww. ja  va 2  s  . c  o  m*/
    for (var i = 0, j = this.length; i < j; i++) {
        if (!tmp[this[i]]) {
            tmp[this[i]] = 1;
            ret.push(this[i]);
        }
    }
    return ret;
}

Related

1. uniqueDates()

   Array.prototype.uniqueDates = function() {
     var u = [];
     for (k=0; k<this.length; k++) {
       var currentDate = new Date(this[k].annum);
       if (u.map(Number).indexOf(+currentDate) < 0) {
         u.push(currentDate);
     return u;
   ...
   

2. uniqueNonEmpty()

   Array.prototype.uniqueNonEmpty = function () {
     var noempties = true;
     var hash = {};
     for (var i=0 ; i<this.length ; i++) {
       if (!this[i] || this[i]=="") {
         noempties = false;
       } else {
         hash[this[i]] = "1";
     var hashlength=0;
     for (i in hash) {hashlength++};
     return (this.length===hashlength && noempties);
   

3. uniqueObjects(props)

   Array.prototype.uniqueObjects = function (props) {
       function compare(a, b) {
           var prop;
           if (props) {
               for (var j = 0; j < props.length; j++) {
                   prop = props[j];
                   if (a[prop] != b[prop]) {
                       return false;
           } else {
               for (prop in a) {
                   if (a[prop] != b[prop]) {
                       return false;
           return true;
       return this.filter(function (item, index, list) {
           for (var i = 0; i < index; i++) {
               if (compare(item, list[i])) {
                   return false;
           return true;
       });
   };
   

4. uniquelize()

   Array.prototype.uniquelize = function() {
     var array = new Array();
     var length = this.length;
     for (var i = 0; i < length; i++) {
       if (!array.inArray(this[i])) {
         array.push(this[i]);
     return array;
   ...
   

5. uniquelize()

   Array.prototype.uniquelize = function(){
        var ra = new Array();
        for(var i = 0; i < this.length; i ++){
            if(!ra.contains(this[i])){
               ra.push(this[i]);
        return ra;
   };
   ...
   

6. uniquelizeES6()

   Array.prototype.uniquelizeES6=function(){
       return  [...new Set(this)]
   

7. uniquer()

   var toEnter = (1,2,3,3,3,4,5,6,'this','this','that');
   Array.prototype.uniquer = function () {
       var uniqueValues = [];
       var checkUniqueValues = function (toBeChecked) {   
         for (var i = 0; i < uniqueValues.length; i++) {
           if (toBeChecked === uniqueValues[i]) {
             return true;
         return false;
       };
       for (var i = 0; i < this.length; i++) { 
         if(checkUniqueValues(this[i]) === false) { 
           uniqueValues.push(this[i]); 
       return uniqueValues;
   };
   var testArray = [1,2,3,3,3,3,3]
   var finalProduct = testArray.uniquer();
   module.exports.finalProduct = finalProduct;
   

8. unique(arr)

   function unique(arr) {
     var result = [],
       hash = {};
     for (var i = 0, elem;
       (elem = arr[i]) != null; i++) {
       if (!hash[elem]) {
         result.push(elem);
         hash[elem] = true;
     return result;
   

9. uniteUnique(arr1, arr2, arr3)

   function uniteUnique(arr1, arr2, arr3) {
     var resultArr = [];
     for (var i = 0; i < arguments.length; i++) {
       for (var j = 0; j < arguments[i].length; j++) {
         if (resultArr.indexOf(arguments[i][j]) === -1) {
             resultArr.push(arguments[i][j]);
     return resultArr;
   uniteUnique([1, 3, 2], [5, 2, 1, 4], [2, 1]);