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Discussion on: What is the nightmare for programmers?

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Felix Wittmann

every code smells after a while....
I'd like to refactor others code. I first write testcases for the existing code (if no tests exist) and then I try to clean up the original code step by step.
I then always have the feeling that I have really improved something.

Important is that you really understand the "business logic" before you just throw away something you didn't understand.