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45 lines
1.1 KiB
JavaScript
45 lines
1.1 KiB
JavaScript
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/*
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* File: hash_map.js
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* Created Time: 2022-12-26
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* Author: Justin (xiefahit@gmail.com)
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*/
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/* Driver Code */
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/* 初始化哈希表 */
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const map = new Map();
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/* 添加操作 */
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// 在哈希表中添加键值对 (key, value)
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map.set(12836, '小哈');
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map.set(15937, '小啰');
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map.set(16750, '小算');
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map.set(13276, '小法');
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map.set(10583, '小鸭');
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console.info('\n添加完成后，哈希表为\nKey -> Value');
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console.info(map);
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/* 查询操作 */
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// 向哈希表输入键 key ，得到值 value
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let name = map.get(15937);
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console.info('\n输入学号 15937 ，查询到姓名 ' + name);
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/* 删除操作 */
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// 在哈希表中删除键值对 (key, value)
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map.delete(10583);
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console.info('\n删除 10583 后，哈希表为\nKey -> Value');
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console.info(map);
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/* 遍历哈希表 */
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console.info('\n遍历键值对 Key->Value');
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for (const [k, v] of map.entries()) {
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console.info(k + ' -> ' + v);
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}
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console.info('\n单独遍历键 Key');
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for (const k of map.keys()) {
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console.info(k);
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}
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console.info('\n单独遍历值 Value');
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for (const v of map.values()) {
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console.info(v);
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}
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