What I'm trying to do seems simple enough, and whatever's wrong must be a really dumb mistake, since I couldn't find other people getting the same error. I just want to apply a lambda to a list - the lambda here isn't what I actually want to do, but it gives the same error.
(apply
(lambda (arg)
(+ 5 arg)
)
(list 2 3 4)
)
When I try to run this, it tells me that I'm passing the lambda an invalid number of arguments. Do you have any advice?
apply calls the function once, passing it the list you've given as the arguments. I think you instead want to use mapcar:
M-: (mapcar (lambda (arg) (+ 5 arg)) (list 2 3 4)) RET
will return the list (7 8 9).