scheme set list function

[Gianmaria Lari]

I wrote this function

#(define (resetList l) (set! l '()))

that I would like to set a list to an empty list. This is an example of use:

\version "2.21.0"

#(define mylist '(1 2 3))

\markup #(object->string mylist) %this prints (1 2 3)

#(define (resetList l) (set! l '()))

#(resetList mylist)

\markup #(object->string mylist) % this I would like it prints () but it prints (1 2 3)

I think the problem is related to the fact resetList changes mylist locally (sort of) but I have no idea how I can fix it. Any help?

Thank you, g.