Nodejs Array Unique uniq()

Method Source Code

// functional sort
Object.defineProperty(Array.prototype, 'uniq', {
    enumerable: false,//from  ww w  .  jav  a  2  s  .  co  m
    value: function() { return [...new Set(this)] }
});


console.log([1,2,3,3,3,2,4].uniq())

Related

1. uniq()

   Array.prototype.uniq = function () {
     return [...new Set(this)];
   };
   

2. uniq()

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

3. uniq()

   Array.prototype.uniq = function(){
     var uniqueness = [];
     for(var i = 0; i < this.length; i++){
       var element = this[i];
       if (this.indexOf(element) === this.lastIndexOf(element) || uniqueness.indexOf(element) === -1){
         uniqueness.push(this[i]);
     return uniqueness;
   ...
   

4. uniq()

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