Android App开发语言选择

// Kotlin示例
fun fetchUserData(id: String): User? {
    return db.users
        .filter { it.id == id }
        .firstOrNull()
}

// Java示例
public User fetchUserData(String id) {
    return db.users.stream()
        .filter(user -> user.getId().equals(id))
        .findFirst()
        .orElse(null);
}

// Dart示例
Future fetchUserData(String id) async {
  final response = await http.get('$api/users/$id');
  return User.fromJson(json.decode(response.body));
}

// JavaScript示例
const fetchUserData = async (id) => {
  const response = await fetch(`${api}/users/${id}`);
  return await response.json();
};