请教大神，为什么用多维数组不可以了？？？

Challenge [Filter Arrays with filter](https://www.freecodecamp.cn/challenges/filter-arrays-with-filter#?solution=var%20oldArray%20%3D%20%5B%5B1%2C2%2C3%2C4%2C5%2C6%2C7%2C8%2C9%2C10%5D%2C%5B1%2C2%2C3%2C4%2C5%2C6%2C7%5D%5D%3B%0A%0A%2F%2F%20%E5%8F%AA%E8%83%BD%E5%9C%A8%E8%BF%99%E4%B8%80%E8%A1%8C%E4%B8%8B%E9%9D%A2%E5%86%99%E4%BB%A3%E7%A0%81%0A%0Avar%20newArray%20%3D%20oldArray.filter(function(arrOne%2CarrTwo)%7B%0A%20%20%0A%20%20var%20newArrOne%3DarrOne.filter(function(val)%7B%0A%20%20%20%20return%20val%3C6%3B%0A%20%20%20%20%0A%20%20%7D)%3B%0A%20var%20newArrTwo%3DarrTwo.filter(function(val)%7B%0A%20%20%20%20return%20val%3C6%3B%0A%20%20%20%20%0A%20%20%7D)%3B%0A%20%20return%20%5BnewArrOne%2CnewArrTwo%5D%3B%0A%7D)%3B%0A) has an issue.
User Agent is: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36.
Please describe how to reproduce this issue, and include links to screenshots if possible.

My code:
```javascript
var oldArray = [[1,2,3,4,5,6,7,8,9,10],[1,2,3,4,5,6,7]];

// 只能在这一行下面写代码

var newArray = oldArray.filter(function(arrOne,arrTwo){

var newArrOne=arrOne.filter(function(val){
return val<6;

});
var newArrTwo=arrTwo.filter(function(val){
return val<6;

});
return [newArrOne,newArrTwo];
});

```
新手请教大神，多维数组用.filter为什么运行不了？？？

是.filter不适用多维数组？？？

还是我的代码有问题呢？？？

Start at the linked “Filter Arrays with filter” challenge and review its expected callback inputs and constraints. Reproduce the provided nested-array example there; done means the reported behavior is explained and any needed correction to the challenge or lesson is clearly identified.

Written by the indexing model from the issue text.