hello-algo/codes/dart/chapter_hashing/hash_map.dart

42 lines
1.2 KiB
Dart
Raw Normal View History

/**
* File: hash_map.dart
* Created Time: 2023-03-29
* Author: liuyuxin (gvenusleo@gmail.com)
*/
/* Driver Code */
void main() {
/* 初始化哈希表 */
final Map<int, String> map = {};
/* 添加操作 */
// 在哈希表中添加键值对 (key, value)
map[12836] = "小哈";
map[15937] = "小啰";
map[16750] = "小算";
map[13276] = "小法";
map[10583] = "小鸭";
print("\n添加完成后,哈希表为\nKey -> Value");
map.forEach((key, value) => print("$key -> $value"));
/* 查询操作 */
// 向哈希表中输入键 key ,得到值 value
final String? name = map[15937];
print("\n输入学号 15937 ,查询到姓名 $name");
/* 删除操作 */
// 在哈希表中删除键值对 (key, value)
map.remove(10583);
print("\n删除 10583 后,哈希表为\nKey -> Value");
map.forEach((key, value) => print("$key -> $value"));
/* 遍历哈希表 */
print("\n遍历键值对 Key->Value");
map.forEach((key, value) => print("$key -> $value"));
print("\n单独遍历键 Key");
map.keys.forEach((key) => print(key));
print("\n单独遍历值 Value");
map.forEach((key, value) => print("$value"));
map.values.forEach((value) => print(value));
}