They considered the compromise a simple law for the return of valuable property.

VOA: special.2009.04.09

Is it one basically? In which case, just return a copy the list. That's the simple case.

是最基本的情况吗？在这种情况下,仅仅返回一个列表的拷贝，这是简单的情况。

麻省理工公开课 - 计算机科学及编程导论课程节选

If it isn't, then I'm going to go back around the loop, and notice what happens. If I get all the way around the loop, that is, all the way through that FOR loop and I never find a path that takes me through here, then the last thing I'm going to do is return a pair or a tuple with a special simple number none twice.

如果没有,我会回到循环看看发生了什么,如果我运行了整个循环,也就是整个for循环,我仍没有找到符合条件的路径,那么我最后做的事情就是返回一对,或者一个数组的两次none值。

麻省理工公开课 - 计算机科学及编程导论课程节选