String-解题：反转字符串(NO.344)

[meibin08]

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"]

原题链接：https://leetcode-cn.com/problems/reverse-string/

[meibin08]

js解题：

/**
 * @param {character[]} s
 * @return {void} Do not return anything, modify s in-place instead.
 */
var reverseString = function (s) {
    let len = s.length - 1;
    let max = Math.ceil(s.length / 2);
    for (var i = 0; i < max; i++) {
        let item = s[len - i];
        s[len - i] = s[i];
        s[i] = item;

    };
    return s;
};