Nodejs Array Unique unique()

Method Source Code

Array.prototype.unique = function() {
    var a = [];/* ww w. j  a v  a2s  . c  o  m*/
    for (var i=0, l=this.length; i<l; i++)
        if (a.indexOf(this[i]) === -1)
            a.push(this[i]);
    return a;
};

Related

1. unique()

   Array.prototype.unique = function() {
       if (Object.prototype.toString.call(this) !== '[object Array]') {
           throw new TypeError("`this` must be Array, not " + typeof this);
       var unique = [];
       for (var i = 0, l = this.length; i < l; i++) {
           var element = this[i];
           if (unique.indexOf(element) === -1) {
               unique.push(element);
   ...
   

2. unique()

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

3. unique()

   Array.prototype.unique = function() {
     var o = {}, i, l = this.length, r = [];
     for(i=0; i<l;i+=1) o[this[i]] = this[i];
     for(i in o) {
       if (o[i]) {
         r.push(o[i]);
     return r;
   ...
   

4. unique()

   Array.prototype.unique = function() {
     return this.filter( function(value, index, self) { 
       return self.indexOf(value) === index;
     } );
   };
   

5. unique()

   Array.prototype.unique = function () {
       var r = new Array();
       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;
   ...
   

6. 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;
   ...
   

7. unique()

   Array.prototype.unique = function() {
     return this.filter(function(item, idx, array) {
       return array.indexOf(item) === idx;
     });
   

8. unique()

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

9. unique()

   Array.prototype.unique = function() {
     var uniques = [];
     this.forEach(function(value) {
       if (uniques.indexOf(value) == -1)
         uniques.push(value);
     });
     return uniques;
   };