I study SwiftUI in swift tutorial. In tutorial Apple shows that code: "List(landmarks,id: \.id){             landmark in             LandmarkRow(landmark: landmark) }" Where "landmarks" it is array of Landmark, "id" it is String var in structure "Landmark" . What do parameter "id: \.id"?

Hi guys! I have one question about .filter. In tutorial Apple show this code: @State private var showFavoritesOnly = false } var body: some View { NavigationView { List(filteredLandmarks) { landmark in NavigationLink(destination: LandmarkDetail(landmark: landmark)) { LandmarkRow(landmark: landmark) } } .navigationTitle("Landmarks") } } } How works this "var filteredLandmarks: [Landmark] { landmarks.filter { landmark in (!showFavoritesOnly || landmark.isFavorite) }}". If somebody tell me how it works i will be happy