So I can similarly do this, which is going to look strange because it's going to give me the same value back out, but it actually did a slightly different thing.

我也可以通过类似的手段来达到这个目的，这看起来很奇怪,但是会返回相同的值，但是它的实现真的有点不同。

麻省理工公开课 - 计算机科学及编程导论课程节选