1. /**
    2.      * https://leetcode-cn.com/problems/reverse-vowels-of-a-string/
    3.      * 反转字符串中的元音字符 #345
    4.      * 编写一个函数，以字符串作为输入，反转该字符串中的元音字母
    5.      * 示例一：输入："hello" 输出："holle"
    6.      * 示例一：输入："leetcode" 输出："leotcede"
    7.      * **/
    9.     var reverseVowels = function (s) {
    10.       const vowelArr = ['a', 'e', 'i', 'o', 'u', 'A', 'E', 'I', 'O', 'U'];
    11.       let arr = s.split('')
    12.       let newArr = [...arr]
    13.       let left = 0;
    14.       let right = arr.length - 1;
    15.       while (left < right) {
    16.         if (vowelArr.includes(arr[left]) && vowelArr.includes(arr[right])) {
    17.           [newArr[left], newArr[right]] = [newArr[right], newArr[left]]
    18.           left++;
    19.           right--
    20.         } else if (vowelArr.includes(arr[left])) {
    21.           right--
    22.         } else {
    23.           left++
    24.         }
    25.       }
    26.       return newArr.join('')
    27.     };
    28.     console.log(reverseVowels('leetcode'))