📅  最后修改于: 2022-03-11 14:48:15.235000             🧑  作者: Mango
void main() {
List l1 = [1, 2, 3, 55, 7, 99, 21];
List l2 = [1, 4, 7, 65, 99, 20, 21];
List l3 = [0, 2, 6, 7, 21, 99, 26];
l1.removeWhere((item) => !l2.contains(item));
l1.removeWhere((item) => !l3.contains(item));
print(l1);
}