Nodejs Array Unique unique()

Method Source Code

Array.prototype.unique = function() {
  var n = {},r=[];
  for(var i = 0; i < this.length; i++) {
    if ( this[i] && !n[this[i]]) {
      n[this[i]] = true;/*from w  w w  .  jav a2 s  .  com*/
      r.push(this[i]);
    }
  }
  return r;
};

Related

1. unique()

   var fs = require('fs');
   Array.prototype.unique = function() {
     var res = [],
       hash = {};
     for (var i = 0, elem;
       (elem = this[i]) != null; i++) {
       if (!hash[elem]) {
         res.push(elem);
         hash[elem] = true;
   ...
   

2. unique()

   Array.prototype.unique = function() {
       var newArr = [],
           origLen = this.length,
           found, x, y;
       for (x = 0; x < origLen; x++) {
           found = undefined;
           for (y = 0; y < newArr.length; y++) {
               if (this[x] === newArr[y]) {
                   found = true;
   ...
   

3. unique()

   Array.prototype.unique = function() {
       return this.reduce(function(accum, current) {
           if (accum.indexOf(current) < 0) {
               accum.push(current);
           return accum;
       }, []);
   };
   function mutation(arr) {
   ...
   

4. unique()

   Array.prototype.unique = function() {
       var a = this.concat();
       for(var i=0; i<a.length; ++i) {
           for(var j=i+1; j<a.length; ++j) {
               if(a[i] === a[j])
                   a.splice(j--, 1);
       return a;
   ...
   

5. unique()

   Array.prototype.unique = function()
       this.sort();
       var re=[this[0]];
       for(var i = 1; i < this.length; i++)
           if( this[i] !== re[re.length-1])
               re.push(this[i]);
   ...
   

6. unique()

   Array.prototype.unique = function () {
     var obj,
       result = [];
     for (var i = 0, l = this.length; i < l; ++i) {
       obj = this[ i ];
       if ( result.indexOf( obj ) < 0 ) {
         result[ result.length ] = obj;
     return result;
   };
   

7. unique()

   Array.prototype.unique = function () {
     var r = [];
     o: for (var i = 0, n = this.length; i < n; i++) {
       for (var x = 0, y = r.length; x < y; x++) {
         if (r[x] == this[i]) {
           continue o;
       r[r.length] = this[i];
   ...
   

8. unique()

   Array.prototype.unique = function(){
       var i,j,len = this.length,tempArr = [],tempLen,state;
       for(i = 0 ; i < len ; i++){
           tempLen = tempArr.length;
           state = true;
           for(j = 0 ; j<tempLen;j++){
               if(this[i] == tempArr[j]){
                   state = false;
           if(state){
               tempArr.push(this[i]);
       return tempArr;
   };
   

9. unique()

   Array.prototype.unique = function() {
     var r = [];
     this.each(function(key, value) {
       if (!r.contains(value)) {
         r.push(value);
     });
     return r;
   };
   ...