Things you should never do
- There is always a temptation to code from scratch rather than improve existing code because you may get a lot of excitement in building something grand. It is also harder to read code than to write it.
- You may assume the difficulty of reading and understanding how the old code works implies that you can write it better. This assumption is usually wrong because the old code worked and was tested and repeatedly debugged. New code will not automatically be better than old. What makes old code look messy is the patches.
- And there are things you can try to improve in messy code. Work on improving architectural problems that require refactoring, moving code around, better defining base classes and sharpening interfaces carefully and work on smaller inefficient parts of a project which you can speed up.
- Rewriting code from scratch is one of the worst mistakes companies/developers can make and should avoid
Full post here, 6 mins read