solutions/0344-reverse-string.js

/**
 * 344. Reverse String
 * https://leetcode.com/problems/reverse-string/
 * Difficulty: Easy
 *
 * 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.
 */

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