{"image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/k/kiririmode/20080309/20080309103454.png","published":"2008-03-08 00:00:01","blog_url":"https://kiririmode.hatenablog.jp/","title":"\u554f\u984c3-13 (3.3.1  Mutable List Structure)","version":"1.0","type":"rich","description":"\u3069\u3046\u306a\u308b\u304b\u3063\u3066\u7121\u9650\u30eb\u30fc\u30d7\u3060\u3088 \uff1e\uff1c \u6ce3\u3051\u308b!!!! (define (last-pair x) (if (null? (cdr x)) x (last-pair (cdr x)))) (define (make-cycle x) (set-cdr! (last-pair x) x) x) (define z (make-cycle (list 'a 'b 'c))) (last-pair z) last-pair \u3067\u305a\u3063\u3068\u30ea\u30b9\u30c8\u304c null \u306b\u306a\u3089\u306a\u3044\u3082\u306e\u3060\u304b\u3089\uff0e\uff0e","author_name":"kiririmode","width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkiririmode.hatenablog.jp%2Fentry%2F20080308%2Fp2\" title=\"\u554f\u984c3-13 (3.3.1  Mutable List Structure) - \u7406\u7cfb\u5b66\u751f\u65e5\u8a18\" 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","author_url":"https://blog.hatena.ne.jp/kiririmode/","categories":["SICP"],"provider_url":"https://hatena.blog","height":"190","blog_title":"\u7406\u7cfb\u5b66\u751f\u65e5\u8a18","url":"https://kiririmode.hatenablog.jp/entry/20080308/p2"}