This is by no means a complete catalog of refactorings. It is, I hope, a collection of those most useful to have them written down. By “most useful” I mean those that are both commonly used and worthwhile to name and describe. I find something worthwhile to describe for a combination of reasons: Some have interesting mechanics which help general refactoring skills, some have a strong effect on improving the design of code. Some refactorings are missing because they are so small and straightforward that I don’t feel they are worth writing up.
