Nodejs Array Distinct distinct()

Method Source Code

Array.prototype.distinct = function () {
    var sameObj = function (a, b) {
        var tag = true;
        if (!a || !b) return false;
        for (var x in a) {
            if (!b[x])
                return false;
            if (typeof (a[x]) === 'object') {
                tag = sameObj(a[x], b[x]);
            } else {/*  ww  w  .j a  v  a 2s. co m*/
                if (a[x] !== b[x])
                    return false;
            }
        }
        return tag;
    }
    var newArr = [], obj = {};
    for (var i = 0, len = this.length; i < len; i++) {
        if (!sameObj(obj[typeof (this[i]) + this[i]], this[i])) {
            newArr.push(this[i]);
            obj[typeof (this[i]) + this[i]] = this[i];
        }
    }
    return newArr;
}

Related

1. distinct()

   Array.prototype.distinct = function(){
     for(var i = 0;i < this.length;i++){
       for(var j = i+1;j < this.length;){
         if(this[j] === this[i]){
         for(var k = j;k < this.length;k++){
           this[k] = this[k + 1];
            delete this[this.length - 1];
           this.length--;
   ...
   

2. distinct()

   Array.prototype.distinct = function() {
       var hash = {};
       var a = [];
       for(var i = 0; i < this.length; i++) {
           if(hash.hasOwnProperty(this[i])) {
               continue;
           hash[this[i]] = true;
           a.push(this[i]);
   ...
   

3. distinct()

   Array.prototype.distinct = function () {
       var result = new Array();
       this.forEach(x => {
           if (!result.contains(x))
               result.push(x);
       });
       return result;
   };
   

4. distinct()

   Array.prototype.distinct = function(){
     var self = this
     var _array = []
     self.forEach(function(e){
       if(_array.contains(e)){
         _array.push(e)
     })
     return _array
   ...
   

5. distinct()

   Array.prototype.distinct = function () {
     var result = [];
     var hash = new Dictionary();
     forEach(this, function (element) {
       if (!hash.contains(element)) {
         result.push(element);
         hash.store(element, element);
     });
   ...
   

6. distinct(comparer)

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

7. distinct2()

   Array.prototype.distinct2 =  function(){
     var _self = this;
     var _a = this.concat().sort(); 
     console.log(_a);
     _a.sort(function(a,b){
       console.log("a: "+ a, "b: "+ b);
       if(a == b){
         var n = _self.indexOf(a);
         _self.splice(n, 1);
   ...