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Ingy döt Net 2013-04-10 12:38:42 -07:00
parent 3af7344581
commit 86c034bb8b
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Task/Search-a-list/ACL2/search-a-list.acl2 Normal file
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(defun index-of-r (e xs i)
(cond ((endp xs) nil)
((equal e (first xs)) i)
(t (index-of-r e (rest xs) (1+ i)))))
(defun index-of (e xs)
(index-of-r e xs 0))