(The same is true for learning Java. Grammar formats and writing specifications also need to be learned from scratch. The only thing that matters is the feeling of programming. And this feeling, as you grow from scratch, will also be there. I don't know how many people like watching Star Wars. I'm a fan of Star Wars. Of course, that's not the point. In the second part, Yoda said something that I thought was very meaningful. He said that sometimes you need to forget the tools you learned before. In fact, we found that some of the self-taught programmers were careless, while others were outstanding. But there are also some bad habits, which is just like poor writing. In general, it is more difficult for a person with poor writing style to become a great writer than for someone who has never written an article. Because you should abandon those bad habits. So, if you have concerns that you haven't programmed before, it doesn't matter. Start from scratch.)