tsz https://blog.hatena.ne.jp/tsz/ tszの日記 https://tsz.hatenadiary.org/ PAIP Common Lisp car部のnilは空リストではなく、atom扱いで実装。 ;;; Exercise 1.3 [m] Write a function that counts the number of atoms in an expression. ;;; For example: (count-atoms '(a (b) c)) =>3. Notice that there is something of an ;;; ambiguity in this: shoud (a nil c) count as three atoms or as two, because it is ;;; equivalent… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftsz.hatenadiary.org%2Fentry%2F20080401%2F1207064531" title="EX1.3 リスト中のatomの数を数える - tszの日記" 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 2008-04-01 00:42:11 rich https://tsz.hatenadiary.org/entry/20080401/1207064531 1.0 100%