IndexPathRawRepresentable02.swift

    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
      
        let rawValue = indexPath.section*100 + indexPath.row
        switch TableIndex(rawValue: rawValue) {
        case .a:
          // do something
        case .b:
          // do something
        }
    }
    
    private enum TableIndex: Int, CaseIterable {
        //rawValue = indexPath.section*100 + indexPath.row
        case a = 100  //a
        case b = 101  //b
    }