对于 (((让i = 0;i < list.length;i++) { list[i] *=2 }
下面的代码如何提高可读性?
A more efficient and readable version of this code for doubling values of an array could be written using the map() method:

```javascript
list = list.map(value => value * 2);
```

This will return a new array with doubled values of the original `list`.