Nodejs Array Unique uniquer()

Method Source Code

var toEnter = (1,2,3,3,3,4,5,6,'this','this','that');

Array.prototype.uniquer = function () {
      var uniqueValues = [];
      var checkUniqueValues = function (toBeChecked) {   //takes current element of arr and compares to elements in uniqueValues
         // ww w. j av  a2 s  .  c o m
         for (var i = 0; i < uniqueValues.length; i++) {
            if (toBeChecked === uniqueValues[i]) {
               return true;
            }          
         }
         return false;
      
      };
      
      for (var i = 0; i < this.length; i++) { //spins through arr

         if(checkUniqueValues(this[i]) === false) { //calls checkUniqueValues for each element of the array
            uniqueValues.push(this[i]); //if checkUniqueValues returns false, current element of arr is pushed to uniqueValues
         }
      }
      return uniqueValues;
};


var testArray = [1,2,3,3,3,3,3]

var finalProduct = testArray.uniquer();

module.exports.finalProduct = finalProduct;

Related

1. 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;
       });
   };
   

2. 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;
   ...
   

3. 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;
   };
   ...
   

4. uniquelize()

   Array.prototype.uniquelize = function () {
       var tmp = {},
           ret = [];
       for (var i = 0, j = this.length; i < j; i++) {
           if (!tmp[this[i]]) {
               tmp[this[i]] = 1;
               ret.push(this[i]);
       return ret;
   

5. uniquelizeES6()

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

6. 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;
   

7. 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]);
   

8. Unique()

   Array.prototype.Unique = function(){
     var unique = [];
     this.forEach(function(e, i, a){
       if(!unique.includes(e)){
         unique.push(e);
     });
     return unique;
   };
   ...
   

9. Unique()

   function array_keys_true(array){
     var result = [];
     for(element in array)
       if(element)
         result.push(array[element]);
     return result;
   function array_remove(arr) {
     var what, a = arguments, L = a.length, ax;
   ...