tree-like list menu 树形列表菜单
Recall that the index closure is the entry point into the controller if the user doesn't specify a custom action like list or show.
回想一下,如果用户不指定一个像list或show这样的操作的话,index闭包就是通往控制器的入口点。
Mayor Bloomberg has already succeeded in other areas, like requiring fast food places in the city to list calorie information.
VOA: special.2010.01.27
These are sort of the cells, if you like, in memory that are holding the elements of the list.
记忆就像是数组中的元素,我们之前说的是,我在这里开始并且比较。
If I do this, try and get the 10th element of a list that's only eight long. I get what looks like an error, but it's actually throwing an exception.
如果我来这么做,试着去取长度为8的列表的第十个元素,我貌似能得到一个错误。
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