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LeetCode 344. 反转字符串 #77

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Chocolate1999 opened this issue Oct 8, 2020 · 0 comments
Open

LeetCode 344. 反转字符串 #77

Chocolate1999 opened this issue Oct 8, 2020 · 0 comments
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双指针 双指针经典题 字符串 字符串经典题

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@Chocolate1999
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仰望星空的人,不应该被嘲笑

题目描述

编写一个函数,其作用是将输入的字符串反转过来。输入字符串以字符数组 char[] 的形式给出。

不要给另外的数组分配额外的空间,你必须原地修改输入数组、使用 O(1) 的额外空间解决这一问题。

你可以假设数组中的所有字符都是 ASCII 码表中的可打印字符。

示例 1:

输入:["h","e","l","l","o"]
输出:["o","l","l","e","h"]

示例 2:

输入:["H","a","n","n","a","h"]
输出:["h","a","n","n","a","H"]

来源:力扣(LeetCode)
链接:https://leetcode-cn.com/problems/reverse-string
著作权归领扣网络所有。商业转载请联系官方授权,非商业转载请注明出处。

解题思路

方法一:利用JS原生api

/**
 * @param {character[]} s
 * @return {void} Do not return anything, modify s in-place instead.
 */
var reverseString = function (s) {
    return s.reverse();
};

方法二:双指针,头尾交换

/**
 * @param {character[]} s
 * @return {void} Do not return anything, modify s in-place instead.
 */
var reverseString = function (s) {
    let i = 0, j = s.length - 1;
    while (i < j) {
        [s[i], s[j]] = [s[j], s[i]]; // 双指针,交换
        i++ , j--;
    }
    return s;
};

最后

文章产出不易,还望各位小伙伴们支持一波!

往期精选:

小狮子前端の笔记仓库

leetcode-javascript:LeetCode 力扣的 JavaScript 解题仓库,前端刷题路线(思维导图)

小伙伴们可以在Issues中提交自己的解题代码,🤝 欢迎Contributing,可打卡刷题,Give a ⭐️ if this project helped you!

访问超逸の博客,方便小伙伴阅读玩耍~

学如逆水行舟,不进则退
@Chocolate1999 Chocolate1999 added 双指针 双指针经典题 字符串 字符串经典题 labels Oct 8, 2020
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