How to remove duplicated objects from an Array in javascript [duplicate]

Question

I am using above code and removing the items based on id
I am getting id is not defined while comparing i+1 item when i reaches to maximum array length. Appreciate your help....

var arr = [{"id":"0-block-0","left":206.5,"top":0},{"id":"0-block-1","left":446.5,"top":0},{"id":"0-block-2","left":474.5,"top":16},{"id":"0-block-2","left":686.5,"top":0}];

    Expecting outout = [{"id":"0-block-0","left":206.5,"top":0},{"id":"0-block-1","left":446.5,"top":0},{"id":"0-block-2","left":686.5,"top":0}]


    Array.prototype.unique = function(){                                    
        var passNum = this.length;
        var _self = this;
        // to repeat loops n*n times
        while(passNum>0){       
             for(var i = 0;i<this.length;i++) {                   
                 if(this[i].id==this[i+1].id){
                        var _indx = this.indexOf(this[i]);
                        this.splice(_indx,1);            
                }                            
            }                   
            passNum = passNum-1;
        }          
        return this;
    };

The normal way to ensure uniqueness is to put your id's in a set. — Dave
– Dave, Commented May 19, 2016 at 15:12

Joe Attardi · Accepted Answer · 2016-05-19 15:16:24Z

0

You can do this with ES2015 Sets.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set

EDIT: If you can't use ES2015, there is a polyfill available.

answered May 19, 2016 at 15:16

Joe Attardi

4,5513 gold badges41 silver badges43 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How to remove duplicated objects from an Array in javascript [duplicate]

1 Answer 1

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Linked

Related