Nodejs Array Unique Unique()

Method Source Code

//Get keys from array which are true
function array_keys_true(array){
   var result = [];
   for(element in array)
      if(element)
         result.push(array[element]);/*from   w w  w  . j av  a2s .c  om*/
   return result;
}

/*Remove value from array
   Example:
   var array = ['one', 'two', 'three'];
   array_remove(array, 'three');
   Result:
   array = ['one', 'two'];
*/
function array_remove(arr) {
   var what, a = arguments, L = a.length, ax;
   while (L > 1 && arr.length) {
      what = a[--L];
      while ((ax= arr.indexOf(what)) !== -1) {
         arr.splice(ax, 1);
      }
   }
   return arr;
}

Array.prototype.Unique = function(){
   var u = {}, a = [];
   for(var i = 0, l = this.length; i < l; ++i){
      if(u.hasOwnProperty(this[i]))
         continue;
      a.push(this[i]);
      u[this[i]] = 1;
   }
   return a;
}

Related

1. uniquelizeES6()

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

2. 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;
   

3. 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;
   

4. 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]);
   

5. Unique()

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