Avoid Obsolete Comments

InformIT: Robert C. Martin's Clean Code Tip of the Week #4: Avoid Obsolete Comments >: "We join 'The Craftsman,' Robert C. Martin's series on an interstellar spacecraft where programmers hone their coding skills. In this fourth tip in the series, the programmers examine the problem with obsolete comments, which tend to migrate away from the code they once described and become floating islands of irrelevance and misdirection."