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". 



  1. /**
  2.  * @param {string} s
  3.  * @return {string}
  4.  */
  5. var reverseString = function (s) {
  6.     let left = 0, right = s.length - 1;
  7.     let sArr = s.split("");
  8.     while (left < right) {
  9.         let c = sArr[left];
  10.         sArr[left++] = sArr[right];
  11.         sArr[right--] = c;
  12.     }
  13.     return sArr.join("");
  14. };
  16. let s = "hello";
  17. console.log(reverseString(s));





posted @ 2017-01-10 22:59  xiejunzhao  阅读(162)  评论(0)  编辑  收藏  举报