Given the following let function:
(let ((foo (list a b c d)))
foo)
How can i modify the list foo?
(let ((foo (list a b c d)))
;some code
foo)
so the returned foo looks like eks: '(some new list) or (a b modified d)
i tried (set) but foo will still return as the original list.
You can use setf to modify a specific element in a list.
(let ((foo (list 'a 'b 'c 'd)))
(setf (third foo) 'modified)
foo)
This will return (a b modified d).
Or if you want to replace the whole variable, you can assign directly to it with setq:
(let ((foo (list 'a 'b 'c 'd)))
(setq foo (list 'some 'new 'list))
foo)
You can't use set with lexical variables, only special variables.
