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> (new-union '(a b c) '(b a d))(A B C D)
CL-USER> (defun our-union (fi la) (and (listp fi) (listp la) (let (( res (reverse fi))) (dolist (elt la) (pushnew elt res)) (reverse res))))STYLE-WARNING: redefining COMMON-LISP-USER::OUR-UNION in DEFUNOUR-UNIONCL-USER> (our-union '(a b c) '(b a d))(A B C D)CL-USER> (our-union 'a '(b a d))NILCL-USER> (our-union '(a b) 'a)NILCL-USER> (our-union '(a b) 'a)NIL |
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