To be more accurate, you should be careful to use object member only when necessary.
更确切地说，你应当小心地，只在必要情况下使用对象成员。
The operation becomes either an array item lookup or an object member lookup.
操作转换成一个数组项查询或者一个对象成员查询。
The operation becomes either an array item lookup or an object member lookup.
操作转换成一个数组项查询或者一个对象成员查询。
应用推荐