Nodejs Array Unique uniq()

Method Source Code

Array.prototype.uniq = function () {
  const uniqArr = [];/*from   w w  w. j a  v  a 2s .c  o  m*/
  for (let i = 0; i < this.length; i++) {
    if (!uniqArr.includes(this[i])) {
      uniqArr.push(this[i]);
    }
  }
  return uniqArr;
};

Related

1. uniq()

   Array.prototype.uniq = function(){
       var ans = [];
       var hasNaN = false;
       for(var i = 0,len = this.length; i < len; i++){
           if(ans.indexOf(this[i]) == -1){
               if(this[i] != this[i]){
                   if(!hasNaN){
                       ans.push(this[i]);
                       hasNaN = true;
   ...
   

2. uniq()

   Array.prototype.uniq = function(){
     var uniques = [];
     for(var i = 0; i < this.length; i++){
       if( uniques.indexOf(this[i]) === -1){
         uniques.push(this[i]);
     return uniques;
   };
   ...
   

3. uniq()

   Array.prototype.uniq = function () {
     var uniques = [];
     this.forEach(function(element){
       var match = false;
       uniques.forEach(function(uniqElement){
         if (uniqElement === element){
           match = true;
       });
   ...
   

4. uniq()

   Array.prototype.uniq = function () {
     var arr = [];
     var flag = true;
     this.forEach(function (item) {
       if (item != item) {
         flag && arr.indexOf(item) === -1 ? arr.push(item) : '';
         flag = false;
       } else {
         arr.indexOf(item) === -1 ? arr.push(item) : ''
   ...
   

5. uniq()

   Array.prototype.uniq = function () {
     var uniq = [];
     for (var i = 0; i < this.length; i++) {
       if (uniq.indexOf(this[i]) === -1) {
         uniq.push(this[i]);
     return uniq;
   };
   ...
   

6. uniq()

   Array.prototype.uniq = function() {
     var uniq_array = [];
     for (var i=0; i<this.length; i++) {
       curr_ele = this[i]
       if (this.lastIndexOf(curr_ele) === i) {
         uniq_array.push(curr_ele);
     return uniq_array;
   ...
   

7. uniq()

   Array.prototype.uniq = function () {
     var sorted = this.sort();
     var uniques = [sorted[0]];
     for(var i = 1; i < sorted.length; i++) {
       if(sorted[i] !== sorted[i-1]) {
         uniques.push(sorted[i]);
       };
     };
     return uniques;
   ...
   

8. uniq()

   Array.prototype.uniq = function() {
     var results = [];
     for (var i = 0, len = this.length; i < len; i++) {
       var found = false;
       for (var j = 0, len2 = results.length; j < len2; j++) {
         if (this[i] === results[j]) {
           found = true;
           break;
       if (!found) {
         results.push(this[i]);
     return results;
   };
   Array.prototype.uniq = function() {
     var results = [];
     for (var i = 0, len = this.length; i < len; i++) {
       if (results.indexOf(this[i]) < 0) {
         results.push(this[i]);
     return results;
   };
   Array.prototype.uniq = function(sorted) {
     return this.inject([], function(array, value, index) {
       if (0 == index || (sorted ? array.last() != value : !array.include(value))) {
         array.push(value);
       return array;
     });
   };
   

9. uniq()

   Array.prototype.uniq = function () {
     var occurrenceHash = {};
     var result = [];
     for (var i = 0; i < this.length; i++) {
       if (!occurrenceHash[this[i]]) {
           occurrenceHash[this[i]] = true;
           result.push(this[i]);
     return result;