Nodejs Array Unique unique()

Method Source Code

// This file contains method extensions to the built-in Array class.

/*/*from  w  w  w .ja  va  2s  . com*/
 * Array - unique method.
 * Returns a new array that is the same as the current one but with all of the duplicates removed.
 * NOTE: Does not work on objects because it uses the == operator and not .equals.
 */
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];
   }
   return r;
}

Related

1. 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;
   ...
   

2. unique()

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

3. unique()

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

4. unique()

   Array.prototype.unique = function () { 
     return this.filter((a, i) => this.indexOf(a) === i) 
   

5. unique()

   Array.prototype.unique = function () {
     var arr = this;
     return this.filter(function (el, idx) {
       return arr.lastIndexOf(el) === idx;
     });
   };
   

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()

   function getDomain(address) {
     return address.substring(address.indexOf('@') + 1);
   function cleanPhoneNo(str) {
     return str.replace(/[^\d]/g, '');
   function escapeRegExp(str) {
     var specials = new RegExp("[.*+?|()\\[\\]{}\\\\]", "g"); 
     return str.replace(specials, "\\$&");
   ...
   

8. unique()

   function SecondGreatLow(arr) {
    arr.sort(function (a,b){
      return a-b;
    });
    arr = arr.unique();
    if (arr.length == 2){
       return arr[1]+ " "+ arr[0];
    } else {
       return arr[1]+ " " + arr[arr.length-2];
   ...
   

9. 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);
   ...