kiririmode https://blog.hatena.ne.jp/kiririmode/ 理系学生日記 https://kiririmode.hatenablog.jp/ SICP まず (define (make-frame origin edge1 edge2) (list origin edge1 edge2)) に対する選択子がこれ。 (define (get-origin frame) (car frame)) (define (get-edge1 frame) (cadr frame)) (define (get-edge2 frame) (caddr frame)) 次に (define (make-frame origin edge1 edge2) (cons origin (cons edge1 edge2))) に対する選択子は (define (ge… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fkiririmode.hatenablog.jp%2Fentry%2F20071214%2Fp3" title=" 問題2-47 (2.2.4 Example: A Picture Language) - 理系学生日記" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2007-12-14 00:00:02 rich https://kiririmode.hatenablog.jp/entry/20071214/p3 1.0 100%