- append list ...procedure
Returns a list consisting of the elements of the first list followed by the elements of the other lists.
(append '(x) '(y)) ===> (x y) (append '(a) '(b c d)) ===> (a b c d) (append '(a (b)) '((c))) ===> (a (b) (c))
The resulting list is always newly allocated, except that it shares structure with the last list argument. The last argument may actually be any object; an improper list results if the last argument is not a proper list.
(append '(a b) '(c . d)) ===> (a b c . d) (append '() 'a) ===> a