只有大约 150 行代码，还不错吧？

Not bad for roughly 150 lines of code, is it?

youdao

跟着教程阅读代码是不错，但是，在您用一个给定库实际解决自己的问题时，很难知道哪个适合您。

Reading code and following tutorials is fine, but until you actually try to solve some of your pain points in a given library, it's hard to know which one is right for you.

youdao

这点不错，它让代码清楚，让命名空间更易于管理。

This is well and good; it clarifies the code and makes the namespace a little more manageable.

youdao

I've certainly written code that has this problem, I've tried to use my own code that has this problem, and good to us, right, good hygiene, I'm going to use that word again here, of getting into the habit of writing defensive code up front, it's part of that collection of things that you ought to do is a great thing to do.

我举手了吧？,我当然写过犯这种错误的程序了,我也尝试过应用含有这种错误的代码，不错，好的卫生，我还是要用这个词,对我们有帮助，养成写防卫性,代码的好习惯，是你应该做的,一系列事情之一,也是我们日后要做的主要的事情。

麻省理工公开课 - 计算机科学及编程导论课程节选