|
|
|
|
/*
|
|
|
|
|
* File: hash_map.rs
|
|
|
|
|
* Created Time: 2023-02-05
|
|
|
|
|
* Author: codingonion (coderonion@gmail.com)
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
use hello_algo_rust::include::print_util;
|
|
|
|
|
|
|
|
|
|
use std::collections::HashMap;
|
|
|
|
|
|
|
|
|
|
/* Driver Code */
|
|
|
|
|
pub fn main() {
|
|
|
|
|
// 初始化哈希表
|
|
|
|
|
let mut map = HashMap::new();
|
|
|
|
|
|
|
|
|
|
// 添加操作
|
|
|
|
|
// 在哈希表中添加键值对 (key, value)
|
|
|
|
|
map.insert(12836, "小哈");
|
|
|
|
|
map.insert(15937, "小啰");
|
|
|
|
|
map.insert(16750, "小算");
|
|
|
|
|
map.insert(13276, "小法");
|
|
|
|
|
map.insert(10583, "小鸭");
|
|
|
|
|
println!("\n添加完成后,哈希表为\nKey -> Value");
|
|
|
|
|
print_util::print_hash_map(&map);
|
|
|
|
|
|
|
|
|
|
// 查询操作
|
|
|
|
|
// 向哈希表中输入键 key ,得到值 value
|
|
|
|
|
let name = map.get(&15937).copied().unwrap();
|
|
|
|
|
println!("\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);
|
|
|
|
|
println!("\n删除 10583 后,哈希表为\nKey -> Value");
|
|
|
|
|
print_util::print_hash_map(&map);
|
|
|
|
|
|
|
|
|
|
// 遍历哈希表
|
|
|
|
|
println!("\n遍历键值对 Key->Value");
|
|
|
|
|
print_util::print_hash_map(&map);
|
|
|
|
|
println!("\n单独遍历键 Key");
|
|
|
|
|
for key in map.keys() {
|
|
|
|
|
println!("{key}");
|
|
|
|
|
}
|
|
|
|
|
println!("\n单独遍历值 value");
|
|
|
|
|
for value in map.values() {
|
|
|
|
|
println!("{value}");
|
|
|
|
|
}
|
|
|
|
|
}
|