higepon https://blog.hatena.ne.jp/higepon/ higepon blog https://higepon.hatenablog.com/ Scheme SICP 問題 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))))))とか (define (fringe t) (if (null? t) '() (append (car t) (fringe (… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhigepon.hatenablog.com%2Fentry%2F20060420%2F1145347718" title=" 関数型言語の勉強にSICPを読もう - (12) 2章 - データによる抽象の構築(63ページ) - 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> http://images-jp.amazon.com/images/P/489471163X.09.MZZZZZZZ.jpg Hatena Blog https://hatena.blog 2006-04-20 17:08:38 rich https://higepon.hatenablog.com/entry/20060420/1145347718 1.0 100%