gistfile1.txt

Observables.combineWithUnit(checkedProducts, view.confirmReplacement())
                        .switchMap { interactor.confirmReplacement(orderId, DenyCourierOrderRequest(it)) }
                        .subscribe { response -> response.fold(view::showError, { Timber.d("confirmed!!!!") }) }
                        
fun <T> combineWithUnit(o1: Observable<T>, o2: Observable<Unit>): Observable<T>
                = Observable.combineLatest(o1, o2, BiFunction { t1, _ -> t1 })
                
val checkedProducts = view.checkProduct()
                .scan(ArrayList<String>(), {acc, next -> acc.add(next); acc})
                .publish()