         tableView.register(nib, forCellReuseIdentifier: studyCellId)
         
         emptyStudyCell = createEmptyCell(text: "no kanji to learn")
-        emptyLearnedCell = createEmptyCell(text: "no learned kanji")
         
         if traitCollection.forceTouchCapability == .available {
             registerForPreviewing(with: self, sourceView: view)

    
    var viewModel: SRSViewModel!
    let studyEntries: MutableProperty<[StudyEntry]> = MutableProperty([])
    let learnedEntries: MutableProperty<[StudyEntry]> = MutableProperty([])
    var emptyStudyCell: EmptyStudyCell!
    var emptyLearnedCell: EmptyStudyCell!
    private var submitAction: SubmitAction!
    private var submitStarter: SubmitStarter!
    let shouldEnableSubmit: MutableProperty<Bool> = MutableProperty(false)

        studyEntries <~ viewModel.studyEntries.signal.map { entries in
            return entries.filter { entry in !entry.learned }
        }

        if let rightButton = navigationItem.rightBarButtonItem {
            rightButton.reactive.isEnabled <~ studyEntries.signal.map { entries in
                return entries.count > 0
