Основы Dart 2; Губатенко Артем

main.dart

/// 1. Capitalize users
List<String> users = ['anna', 'viKtor', 'Mike', 'aleX', 'dan'];

List<String> capitalizeNames(List<String> names) {
  return names.map((String name) {
    return "${name[0].toUpperCase()}${name.substring(1).toLowerCase()}";
  }).toList();
}

/// 2. Searching hero
List<Map<String, dynamic>> data = [
  {"name": "Batman", "age": 30},
  {"name": "Spiderman", "age": 18},
  {"name": "Kung fury", "age": 23},
  {"name": "Tor", "age": 550},
  {"name": "Halk", "age": 44},
  {"name": "Iron man", "age": 35},
];

Map<String, dynamic> findUser(
    List<Map<String, dynamic>> heroes, String findName) {
  return heroes.firstWhere((element) => element["name"] == findName,
      orElse: () => {"name": "Anonimus", "age": 0});
}

/// 3. Modernize code
abstract class Hero {
  void say();
}

mixin Fly {
  void canFly(int speed) {
    print("Я могу летать со скоростью $speed км/ч!");
  }
}

mixin Jump {
  void canJump() {
    print("Я могу прыгать.");
  }
}

class SuperMan extends Hero with Fly, Jump {
  int flySpeed;

  SuperMan(this.flySpeed);

  void say() {
    canFly(flySpeed);
    canJump();
  }
}

void main() {
  // #1
  List<String> resultUsers = capitalizeNames(users);
  print(resultUsers);
  print(" -- ");

  // #2
  Map<String, dynamic> batmanHero = findUser(data, "Batman");
  print(batmanHero);

  Map<String, dynamic> anonimus = findUser(data, "Superman");
  print(anonimus);
  print(" -- ");

  // #3
  SuperMan hero = SuperMan(200);
  hero.say();
}