{"height":"190","blog_title":"higepon blog","width":"100%","version":"1.0","url":"https://higepon.hatenablog.com/entry/20060420/1145347718","image_url":"http://images-jp.amazon.com/images/P/489471163X.09.MZZZZZZZ.jpg","published":"2006-04-20 17:08:38","provider_name":"Hatena Blog","blog_url":"https://higepon.hatenablog.com/","categories":["Scheme","SICP"],"author_name":"higepon","author_url":"https://blog.hatena.ne.jp/higepon/","provider_url":"https://hatena.blog","title":" \u95a2\u6570\u578b\u8a00\u8a9e\u306e\u52c9\u5f37\u306bSICP\u3092\u8aad\u3082\u3046 - (12) 2\u7ae0 - \u30c7\u30fc\u30bf\u306b\u3088\u308b\u62bd\u8c61\u306e\u69cb\u7bc9(63\u30da\u30fc\u30b8)","type":"rich","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhigepon.hatenablog.com%2Fentry%2F20060420%2F1145347718\" title=\" \u95a2\u6570\u578b\u8a00\u8a9e\u306e\u52c9\u5f37\u306bSICP\u3092\u8aad\u3082\u3046 - (12) 2\u7ae0 - \u30c7\u30fc\u30bf\u306b\u3088\u308b\u62bd\u8c61\u306e\u69cb\u7bc9(63\u30da\u30fc\u30b8) - higepon blog\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"\u554f\u984c 2.28 (define (fringe tree) (define (pair-to-list pair) (list (car pair) (car (cdr pair)))) (if (null? tree) '() (if (pair? (car tree)) (append (pair-to-list (car tree)) (fringe (cdr tree))) (append (car tree) (fringe (cdr tree))))))\u3068\u304b (define (fringe t) (if (null? t) '() (append (car t) (fringe (\u2026"}