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59 lines
1.3 KiB
59 lines
1.3 KiB
2 years ago
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/*
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* File: list.js
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* Created Time: 2022-12-12
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* Author: Justin (xiefahit@gmail.com)
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*/
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/* 初始化列表 */
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const list = [1, 3, 2, 5, 4];
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console.log(`列表 list = ${list}`);
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/* 访问元素 */
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const num = list[1];
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console.log(`访问索引 1 处的元素，得到 num = ${num}`);
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/* 更新元素 */
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list[1] = 0;
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console.log(`将索引 1 处的元素更新为 0 ，得到 list = ${list}`);
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/* 清空列表 */
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list.length = 0;
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console.log(`清空列表后 list = ${list}`);
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/* 尾部添加元素 */
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list.push(1);
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list.push(3);
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list.push(2);
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list.push(5);
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list.push(4);
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console.log(`添加元素后 list = ${list}`);
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/* 中间插入元素 */
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list.splice(3, 0, 6);
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console.log(`在索引 3 处插入数字 6 ，得到 list = ${list}`);
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/* 删除元素 */
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list.splice(3, 1);
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console.log(`删除索引 3 处的元素，得到 list = ${list}`);
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/* 通过索引遍历列表 */
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let count = 0;
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for (let i = 0; i < list.length; i++) {
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count++;
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}
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/* 直接遍历列表元素 */
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count = 0;
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for (const n of list) {
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count++;
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}
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/* 拼接两个列表 */
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const list1 = [6, 8, 7, 10, 9];
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list.push(...list1);
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console.log(`将列表 list1 拼接到 list 之后，得到 list = ${list}`);
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/* 排序列表 */
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list.sort((a, b) => a - b);
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console.log(`排序列表后 list = ${list}`);
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