How to push the empty JSON data to an array field which is type of Observable<any[]> angular 2

Question

I have a variable like,

public categories: Observable<any[]>;

So after the service call, the returned data of service call will push an array of JSON data to the field which I mentioned above.

After that, I need to push an empty JSON data to that field. As it is a type of Observable, I can't just directly use .push

Is there any solution to push the empty JSON data to an array which is type of Observable?

Answer 1

You just need to import latest EmptyObservable of rxjs , that will do the trick in your case.

import {EmptyObservable} from 'rxjs/observable/EmptyObservable';

public categories: Observable<any[]>;

//just assign this to your variable
this.categories = new EmptyObservable();

for more info have a look here