How much duplicated code do you tolerate? [closed]

Question

In a recent code review I spotted a few lines of duplicated logic in a class (less than 15 lines). When I suggested that the author refactor the code, he argued that the code is simpler to understand that way. After reading the code again, I have to agree extracting the duplicated logic would hurt readability a little.

I know DRY is guideline, not an absolute rule. But in general, are you willing to hurt readability in the name of DRY?

Answer 1

I tolerate none. I may end up having some due to time constraints or whatnot. But I still haven't found a case where duplicated code is really warranted.

Saying that it'll hurt readability only suggests that you are bad at picking names :-)