position-insert-seq

kind of ... "position-insert" with OVERWRITE

(defun position-insert-seq (&key alist insert item)
  (let ((pos (car (position-item item alist))))
    (position-replace (gen-integer pos (+ pos (1- (length insert)))) insert alist)))


(setf alist '(0 0 0 0 0 0 1 0 2 0 0 0 3 5 7))
(setf insert '(a b c d))

(position-insert-seq :alist '(0 0 0 0 0 0 1 0 2 0 0 0 3 5 7)
                 :insert '(a b c d)
                 :item 2)

=> (0 0 0 0 0 0 1 0 a b c d 3 5 7)