[Dart] 1일차_list, map, set

1) list

void main() {
  // List
  // 리스트
  List<String> blackPink = ['제니', '지수', '로제', '리사'];
  List<int> numbers = [1, 2, 3, 4, 5];
  
  print(blackPink);
  print(numbers);
  
  // index
  // 순서
  // 0 부터 시작
  print(blackPink[0]);
  print(blackPink[1]);
  
  print(blackPink.length);
  
  blackPink.add('코드팩토리');
  
  print(blackPink);
  
  blackPink.remove('리사');
  
  print(blackPink);
  
  print(blackPink.indexOf('로제'));
}

2) map

void main() {
  // Map
  // Key / Value
  Map<String, String> dictionary = {
    'Harry Potter': '해리포터',
    'Ron Weasley': '론 위즐리',
    'Hermione Granger': '헤르미온느 그레인저',
  };
  
  print(dictionary);
  
  Map<String, bool> isHarryPotter = {
    'Harry Potter': true,
    'Ron Weasley': true,
    'Ironman': false,
  };
  
  print(isHarryPotter);
  
  isHarryPotter.addAll({
    'Spiderman': false,
  });
  
  print(isHarryPotter);
  
  print(isHarryPotter['Ironman']);
  
  isHarryPotter['Hulk'] = false;
  
  print(isHarryPotter);
  
  isHarryPotter['Spiderman'] = true;
  
  print(isHarryPotter);
}

void main() {
  // Map
  // Key / Value 
  Map<String, bool> isHarryPotter = {
    'Harry Potter': true,
    'Ron Weasley': true,
    'Ironman': false,
  };
  
  print(isHarryPotter);
  
  isHarryPotter.remove('Harry Potter');
  
  print(isHarryPotter);
  
  print(isHarryPotter.keys);
  print(isHarryPotter.values);
}

3) set

void main() {
  // Set
  final Set<String> names = {
    'Code Factory',
    'Flutter',
    'Black Pink',
    'Flutter',
  };
  
  print(names); // 자동으로 중복처리 해준다
  
  names.add('Jenny');
  
  print(names);
  
  names.remove('Jenny');
  
  print(names);
  
  print(names.contains('Flutter'));
}