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//............................

@Effect()
  updateTodo$: Observable<Action> = this.actions$.
    ofType<TodoActions.UpdateTodo>(TodoActions.UPDATE_TODO)
    .mergeMap(action =>
      this.http.put(environment.client.base_url + '/api/todos/', action.payload)
        .map((data: Response) => {

          return new TodoActions.UpdateTodoSuccess({
            ...action.payload, loading: false, editing: false
          });
        })
        .catch(() => of(new TodoActions.DeleteTodoError(action.payload)))
    );