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Aamir Mirza25,033 Points
More code challenges like these!
I find it better than step-by-step code challenges because you'll have to come up with the code yourself, and solve any problems that may arise. This emulates a real programming environment, because most of the time, you're -not- given an instruction list, detailing step-by-step, of what to do next to accomplish the end goal. Rather, you have to have an intuitive understanding of what must be done next.
In this code challenge, one simply had to fix the errors, but it can be used for various other kinds of code challenges. I think a lot of the "extra credit" challenges commonly found at the end of achievements could do with having a solutions video. It would give me some motivation to at least try the extra credit challenges.
tl;dr - less code challenges with step-by-step instructions, and more experimenting code challenges with clear end goals/results.
I like the extra credit, but wish they had an answer video for those. Otherwise, I think the step by step is good for basic courses and should move to more task based as the courses become more advanced.