How to use index in SwiftUI list

Issue #515

Use enumerated and id: \.element.name

struct CountriesView: View {
    let countries: [Country]

    var body: some View {
        let withIndex = countries.enumerated().map({ $0 })

        return List(withIndex, id: \.element.name) { index, country in
            NavigationLink(
                destination: CountryView(country: country),
                label: {
                    VStack(alignment: .leading) {
                        Text(country.name)
                            .styleMultiline()
                    }
                    .paddingVertically()
                }
            )
        }
    }
}