Simple filter on array of RXJS Observable

Question

I am starting my project with Angular2 and the developers seem to recommend RXJS Observable instead of Promises.

I have achieved to retrieve a list of elements (epic

Answer 1

You'll want to filter the actual array and not the observable wrapped around it. So you'll map the content of the Observable (which is an Epic[]) to a filtered Epic.

getEpic(id: string): Observable {
  return this.getEpics()
     .map(epics => epics.filter(epic => epic.id === id)[0]);
}

Then afterwards you can subscribe to getEpic and do whatever you want with it.