{"description":"item\u304clst\u306e\u8981\u7d20\u3067\u3042\u308b\u305f\u3081\u306b\u306f\u3001lst\u304c\u7a7a\u30ea\u30b9\u30c8\u3067\u306a\u3044\u3053\u3068 (not null lst)) lst\u306e\u5148\u982d\u8981\u7d20\u304citem\u3067\u3042\u308b\u304b\u3001 (eql item (first lst)) \u3082\u3057\u304f\u306fitem\u306f\u30ea\u30b9\u30c8\u306e\u6b8b\u308a\u306e\u90e8\u5206\u306e\u8981\u7d20\u3067\u3042\u308b\u304b\u3067\u3042\u308b\u3002 (member? item (rest lst)) (defun member? (item lst) (and (not (null lst)) (or (eql item (first lst)) (member? item (rest lst))))) (print (member? 'c '(a b c d))) (print (member 'c\u2026","categories":["\u8aad\u66f8\u30ce\u30fc\u30c8"],"type":"rich","blog_url":"https://www.shigemk2.com/","author_name":"shigemk2","width":"100%","published":"2013-05-03 15:11:13","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.shigemk2.com%2Fentry%2F20130503%2F1367561473\" title=\"\u5bfe\u8a71\u306b\u3088\u308bCommon Lisp\u5165\u9580 48 and \u305d\u306e2 - by shigemk2\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_name":"Hatena Blog","image_url":null,"version":"1.0","author_url":"https://blog.hatena.ne.jp/shigemk2/","url":"https://www.shigemk2.com/entry/20130503/1367561473","blog_title":"by shigemk2","height":"190","title":"\u5bfe\u8a71\u306b\u3088\u308bCommon Lisp\u5165\u9580 48 and \u305d\u306e2","provider_url":"https://hatena.blog"}