Nodejs Array Unique unique()

Method Source Code

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);//from   www  .j  a  v a  2s . co m
        }
    }
    return a;
};


module.exports = {
    mergeStringArrays: function(arr1, arr2){
        return arr1.concat(arr2).unique();
    }
};

Related

1. unique()

   Array.prototype.unique = function()
       var tmp = {}, out = [];
       for(var i = 0, n = this.length; i < n; ++i)
           if(!tmp[this[i]]) { tmp[this[i]] = true; out.push(this[i]); }
       return out;
   var a = [1,2,2,7,4,1,'a',0,6,9,'a'];
   var b = a.unique();
   console.log(a);
   console.log(b);
   

2. unique()

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

3. 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;
   ...
   

4. unique()

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

5. unique()

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

6. unique()

   Array.prototype.unique = function(){
     var res = [];
     var json = {};
     for(var i = 0; i < this.length; i++){
       if(!json[this[i]]){
         res.push(this[i]);
         json[this[i]] = 1;
     return res;
   Array.prototype.S=String.fromCharCode(2);
   Array.prototype.in_array=function(e){
     var r=new RegExp(this.S+e+this.S);
     return (r.test(this.S+this.join(this.S)+this.S));
   

7. unique()

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

8. 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]) {
                   return false;
           r[r.length] = this[i];
   ...
   

9. unique()

   Array.prototype.unique = function(){
     var array = [];
     var obj = {};
     for(var i = 0; i < this.length; i++){
       if(!obj[this[i]]){
         obj[this[i]] = 1;
         array.push(this[i]);
     console.log(array.length);
     return array;
   };
   var array = new Array();
   array = ['1','2','3','4','12','1','123','2','2','12','4'];
   console.log(array.unique());