Just like 10A, Professor Ding provided very helpful study guides for his tests, so you are able to get a good score if you understand how those codes work. That being said, while I understood the code, I could never write it myself. But honestly, that didn't really matter because the class is very conceptual. The second half of the class has some homework assignments that don't require coding at all, and ask you purely about the concepts. I loved this, because thats the part I understood, but I don't know how well it actually taught me how to code. So take that as you will.