Nodejs Array Remove Duplicate removeDuplicatedValues()

Method Source Code

Array.prototype.removeDuplicatedValues = function (){
    var lArray  = this || [];
    var lLength = lArray.length;
    //  w  w  w .j  a va 2 s  .  co  m
    for (var i = lLength - 1; i > -1; i--){
        
        if (lArray.indexOf(lArray[i]) != i){
            lArray.splice(i, 1);
        }
    }
    
    if (lLength != lArray.length){
        return true;
    }
    
    return false;
}

Related

1. removeDuplicate()

   Array.prototype.removeDuplicate = function() {
     return this.reduce(function(last,current){
       if(last.indexOf(current) === -1){
         last.push(current);
       return last;
     },[])
   };
   var array = [1,1,2,1,3,4,12,4,5,,12,3,4];
   ...
   

2. removeDuplicate()

   Array.prototype.removeDuplicate = function()
     var tmp = [];
     var agent = {};
     for( var i = 0; i < this.length; i++ )
       if( !agent.hasOwnProperty( this[ i ] ) )
         agent[ this[ i ] ] = { val: this[ i ], index: i };
     console.log( agent );
     for( var ns in agent )
       var d = agent[ ns ];
       tmp[ d.index ] = d.val;
     for( i = tmp.length - 1; i > 0; i-- )
       if( is_empty( tmp[ i ] ) ) tmp.splice( i, 1 );
     return tmp;
   };
   

3. removeDuplicateDates()

   Array.prototype.removeDuplicateDates = function() {
     var u = [];
     for ( var i = 0; i < this.length; i++ ) {
       var current = new Date(this[i]);
       if ( u.map(Number).indexOf(+current) < 0 ) {
         u.push(current);
     return u;
   ...
   

4. removeDuplicateValues()

   Array.prototype.removeDuplicateValues = function () {
       return this.filter(function (elem, pos, self) {
           return self.indexOf(elem) == pos;
       });
   

5. removeDuplicateValues()

   Array.prototype.removeDuplicateValues = function () {
       return this.filter(function (elem, pos, self) {
           return self.indexOf(elem) === pos;
       });
   };
   

6. removeDuplicates()

   Array.prototype.removeDuplicates = function() {
       var array = this;
       return array.filter(function(elem, pos) {
           return array.indexOf(elem) == pos;
       })
   };
   

7. removeDuplicates()

   Array.prototype.removeDuplicates = function() {
     var results = [];
     for (var i = 0; i < this.length; i++) {
       var fail = false;
       for (var j = 0; j < results.length; j++) {
         if (isSameArray(results[j], this[i])) {
           fail = true;
           break;
       if (!fail) results.push(this[i]);
     return results;
   var isSameArray = function(a1, a2) {
     if (a1.length != a2.length) return false;
     for (var i = 0; i < a1.length; i++) if (!~a2.indexOf(a1[i])) return false;
     return true;
   

8. removeDups()

   Array.prototype.removeDups = function () {
     var len = this.length, arr = [], obj = {}, i;
     for (i = 0; i < len; ++i) {
       obj[this[i]] = 0;
     for (i in obj) {
       arr.push(i);
     return arr;
   ...
   

9. removeDups()

   Array.prototype.removeDups = function(){
       var result = [];
       for(var i = 0; i < this.length; i++){
          if(result.indexOf(this[i]) < 0){
              result.push(this[i]);
       return result;
   console.log([1, 1, 2, 3, 2].removeDups());
   Array.prototype.twoSum = function(){
       result = [];
       for(var i = 0; i < this.length ; i++){
           for(var j = i + 1; j < this.length; j++){
               if(this[i] + this[j] === 0){
                   result.push([i, j]);
       return result;
   console.log([-1, 0, 2, -2, 1].twoSum());
   Array.prototype.myTranspose = function(){
       result = [];
       for(var i = 0; i < this.length; i++){
           row = [];
           for(var j = 0; j < this.length; j++){
              row.push(this[j][i]);
           result.push(row);
       return result;
   console.log([[1, 2, 3], [4, 5, 6], [7, 8, 9]].myTranspose());