/**
 * 和JavaScript中set对象类似
 */

main(List<String> args) {
  List list = [1, 2, 3, 1, 1, 1, 1, 2, 2, 2, 2, 2, 3, 4, 5, 3, 4, 5];
  Set set = new Set();
  set.addAll(list);

  print(set);
  // {1, 2, 3, 4, 5}
  print(set.toList());
  // [1, 2, 3, 4, 5]
}