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49 lines
1.3 KiB
Rust
49 lines
1.3 KiB
Rust
/*
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* File: hash_map.rs
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* Created Time: 2023-02-05
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* Author: codingonion (coderonion@gmail.com)
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*/
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use hello_algo_rust::include::print_util;
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use std::collections::HashMap;
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/* Driver Code */
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pub fn main() {
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// 初始化雜湊表
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let mut map = HashMap::new();
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// 新增操作
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// 在雜湊表中新增鍵值對 (key, value)
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map.insert(12836, "小哈");
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map.insert(15937, "小囉");
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map.insert(16750, "小算");
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map.insert(13276, "小法");
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map.insert(10583, "小鴨");
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println!("\n新增完成後，雜湊表為\nKey -> Value");
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print_util::print_hash_map(&map);
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// 查詢操作
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// 向雜湊表中輸入鍵 key ，得到值 value
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let name = map.get(&15937).copied().unwrap();
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println!("\n輸入學號 15937 ，查詢到姓名 {name}");
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// 刪除操作
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// 在雜湊表中刪除鍵值對 (key, value)
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_ = map.remove(&10583);
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println!("\n刪除 10583 後，雜湊表為\nKey -> Value");
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print_util::print_hash_map(&map);
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// 走訪雜湊表
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println!("\n走訪鍵值對 Key->Value");
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print_util::print_hash_map(&map);
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println!("\n單獨走訪鍵 Key");
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for key in map.keys() {
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println!("{key}");
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}
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println!("\n單獨走訪值 value");
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for value in map.values() {
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println!("{value}");
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}
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}
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