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private func fetchPlanets() {
do {
try planetsController.performFetch()
catch {
NSLog("Fetching failed with error \(error as NSError).")
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return planetsController.sections?[0].numberOfObjects ?? 0
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "PlanetCellIdentifier", for: indexPath)
cell.accessoryType = .disclosureIndicator
cell.textLabel?.text = planetsController.object(at: indexPath).name
return cell
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
scenePresenter?.presentDetailedInfo(for: planetsController.object(at: indexPath))
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