344.reverse-string.js

/*
 * @lc app=leetcode id=344 lang=javascript
 *
 * [344] Reverse String
 */
/**
 * @param {character[]} s
 * @return {void} Do not return anything, modify s in-place instead.
 */
var reverseString = function(s) {
    let [left,right]=[0,s.length-1];
    while(left<=right){
        let tmp=s[left];
        s[left]=s[right];
        s[right]=tmp;
        left++;
        right--;
    }
};