冒泡排序，乱序英文字母表

Question

1. 利用冒泡算法，将以下字符串数组（乱序英文字母表）由 a - z 顺序排列， 再由 z - a 倒叙排列
   var arr = ["w", "g", "h", "d",
   "y","f","b","c","z","j","m","k","l","n","o","t","q","r","s","p","u","v","a","x","e","i"]

Answer 1

如下：

<script>
//数组排序（冒泡排序）
//冒泡排序是一种算法，把一系列的数据按照一定的循序进行排列显示（从小到大或从大到小）
    var arr = ["w", "g", "h", "d","y","f","b","c","z","j","m","k","l","n","o","t","q","r","s","p","u","v","a","x","e","i"];
  var temp;
    for(i=0;i<arr.length-1;i++)
    {
        for(j=0;j<arr.length-i-1;j++)
        {
            if(arr[j]>arr[j+1])
            {
                temp = arr[j];
                arr[j] = arr[j+1];
                arr[j+1] = temp;
            }
        }
    }
    console.log(arr);

</script>