344.反转字符串 Reverse String

Write a function that takes a string as input and returns the string reversed.

Example:
Given s = "hello", return "olleh". 

/**
 * @param {string} s
 * @return {string}
 */
var reverseString = function (s) {
    let left = 0, right = s.length - 1;
    let sArr = s.split("");
    while (left < right) {
        let c = sArr[left];
        sArr[left++] = sArr[right];
        sArr[right--] = c;
    }
    return sArr.join("");
};
let s = "hello";
console.log(reverseString(s));

来自为知笔记(Wiz)