This arrangement allows you to undo any change simply by moving the head of the list to a sublist.
这种安排使得您只需将列表的头文件移动到某个 子列表中,就可以撤消任务修改。
This arrangement allows you to undo any change simply by moving the head of the list to a sublist.
这种安排使得您只需将列表的头文件移动到某个子列表中,就可以撤消任务修改。
You can also use this operator to extract the head and tail of a list.
你也可以使用这个操作符来从一个列表中解出头和尾。
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