Rxjs: Observable.combineLatest vs Observable.forkJoin : <p>Just wonder what is differences between <code>Observable.combineLatest</code> and  <code>Observable.forkJoin</code>? As far as I can see, the only difference is <code>forkJoin</code> expects the Observables to be completed, while <code>combineLatest</code> return the latest values.</p>
