LeetCode 344 Reverse String 翻转字符串

描述

Write a function that reverses a string. The input string is given as an array of characters s.

You must do this by modifying the input array in-place with O(1) extra memory.

Example 1:

Input: s = ["h","e","l","l","o"]
Output: ["o","l","l","e","h"]
Example 2:

Input: s = ["H","a","n","n","a","h"]
Output: ["h","a","n","n","a","H"]

来源：力扣（LeetCode）
链接：https://leetcode.cn/problems/reverse-string
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题解

/**
 * @param {character[]} s
 * @return {void} Do not return anything, modify s in-place instead.
 */
var reverseString = function (s) {
    if (s.length < 2) return s
    let left = 0, right = s.length - 1
    while (left < right) {
        [s[left], s[right]] = [s[right], s[left]]
        left ++
        right --
    }
    return s
};