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

original answer with a fix: Observables are lazy. You have to call subscribe to tell an observable to send its request.

  getEpic(id:number) {
    return this.getEpics()
           .filter(epic => epic.id === id)
           .subscribe(x=>...);
  }

Update to Rxjs 6:

import {filter} from 'rxjs/operators';

getEpic(id:number) {
        return this.getEpics()
               .pipe(filter(epic => epic.id === id))
               .subscribe(x=>...);
      }