dev-executor

case 'CHOOSE': {
      return Object.assign(state, { choosed: action.choosed }
      });
    }

case 'CHOOSE': {
      return state =  {...state, choosed: action.choosed }
 
 }

Observable.interval(3000)
            .do(value => console.log('attempt #', value))
            .switchMap(() => Observable.defer(() => this.http.get(url))
                  .map(data => data)
                  .catch(err => console.log(err))
            )
            .catch (err => Observable.empty())
            .subscribe(data => console.log(data));