JavaScript数组排序详解：默认行为与自定义比较函数

var arr = [5,32,28,66,2,15,3];
  arr.sort(function(a1,a2){ 
   return a1-a2; //a2-a1 输入倒序
  });
  console.log(arr);
  console.log(arr.reverse()); //reverse颠倒数组中元素的顺序

 var arr2 = ['hezihao','chensan','xiaomin','lishi']
  arr2.sort();
  console.log(arr2);

 var arr3 = ['6','8','0','7']
  arr3.sort();
  console.log(arr3);