Implement a function that takes a function and inverts all its add operation for subtraction. It is the simplest case I can think of manipulating code as data that is not easy to implement on non-lisp languages. Perhaps there is some other simpler example.
Implement a function that takes a function and inverts all its add operation for subtraction. It is the simplest case I can think of manipulating code as data that is not easy to implement on non-lisp languages. Perhaps there is some other simpler example.