title: Need help on reduce part in RXSwift
body: <p>I don't know how to fix below code.
  I merged two separate publish subject and I want bind result to my <code>Tableview</code>.</p>
  <pre><code>    Observable.merge(myCardsViewModel.digitalCard.asObservable()
          .map { $0.map { item in MergeCardModel.init(bankId: item.bankId, cardNumber: item.cardNumber, holderName: item.holderName, id: item.id, isDigital: item.isDigital, status: item.status, expirationDate: &quot;&quot;, expirationMonth: &quot;&quot;, expirationYear: &quot;&quot;)}
      }, card2CardMyCardsViewModel.mycardsItem.asObservable()
          .map { $0.map { item in MergeCardModel.init(bankId: item.bankId, cardNumber: item.cardNumber, holderName: item.holderName, id: &quot;&quot;, isDigital: false, status: &quot;&quot;, expirationDate: item.expirationDate, expirationMonth: item.expirationMonth, expirationYear: item.expirationYear) }})
          .reduce([], accumulator: +)
          .bind(to: tblView.rx.items) {(tv, row, item) -&gt; UITableViewCell in
              
  
              
              return cell
      }.disposed(by: disposeBag)
  </code></pre>