Function: setnth
setnth is a byte-compiled function defined in cl-compat.el.gz.
Signature
(setnth N LIST X)
Source Code
;; Defined in /usr/src/emacs/lisp/obsolete/cl-compat.el.gz
;;; Setf internals.
(defun setnth (n list x)
(setcar (nthcdr n list) x))