Reverse string [https://leetcode.com/problems/reverse-string/]

reverse_string.js

/**
 * @param {character[]} s
 * @return {void} Do not return anything, modify s in-place instead.
 */
var reverseString = function(s) {
    const inputLength = s.length - 1;
    const end = Math.floor(inputLength / 2);

    for (let i = 0; i <= end; i++) {
        [s[i], s[inputLength - i]] = [s[inputLength - i], s[i]];
    }
};