typescript set of objects

I am new in angular2 and typescript. I have a problem in creating an unique collection like Set<>. I want to avoid duplicate objects in a collection, for that purpose, try to use a set dataType like following code:

private cardItems = new Set<MyBean>([]);


MyBean is an object.

export class MyBean {

id:integer
ownerId:integer
ownerName:string
img: string;

constructor() {

}
public equals(obj: MyBean) {
console.log(obj.id);
if (this.id == obj.id) {
console.log(obj.id);
return true;
}
if (obj == null)
return false;

return true;
}

public hashCode(obj: MyBean) {
return obj.id
}


}

but equals and hashCode does not run in this way.and I have duplicate objects in set.

What is the solution for implementing Set?

Many thanks

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