把数字排序 —— 倒序

 1 function descendingOrder(n){
 2   //...
 3   let arr = n.toString().split(‘‘)
 4   let arr2 = arr.sort(function(a,b) {
 5     return b-a
 6   })
 7   arr2 = parseInt(arr2.join(‘‘));
 8   console.log(arr2)
 9  return arr2
10 }
11 descendingOrder(123456789)

1 function descendingOrder(n){
2 return parseInt(n.toString().split(‘‘).sort(function(a,b){return b-a}).join(‘‘))
3 }
4 descendingOrder(123456789)