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I wrote a Lisp function earlier that had an error. The first challenge was to figure out how to view the function again. That challenge is solved. Now that I see WHAT I have done wrong, I want to modify the contents of the defined function without rewriting the whole thing?
Seems like as intelligent as Lisp is, there HAS to be a way to do this, I just don’t know what it is because I am fairly new to the language. Can this be done?
Judging from the question, I think that you have a strange setup. It seems to indicate that you are writing your functions directly at the REPL. Don’t do that.
The usual setup is to have an IDE (for example, Emacs with Slime) where you edit a source file, and then “send” top-level forms (like function definitions) to the REPL.