復習中心 >(setq al nil) nil >(setq al (acons 0 'zero al)) ((0 . zero)) >(push '(1 . one) al) ((1 . one) (0 . zero)) >(setq al (acons 2 'two al)) ((2 . two) (1 . one) (0 . zero)) >(assoc 1 al) (1 . one) >(rassoc 'zero al) (0 . zero) >(assoc…

member item list &key key test test-not => tailmember-if predicate list &key key => tailmember-if-not predicate list &key key => tail(reference "http://www.lisp.org/HyperSpec/Body/fun_membercm__ember-if-not.html")