{"categories":["scheme"],"provider_name":"Hatena Blog","width":"100%","author_url":"https://blog.hatena.ne.jp/guyon/","blog_url":"https://guyon.hatenablog.jp/","height":"190","blog_title":"Guyon Diary","version":"1.0","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fguyon.hatenablog.jp%2Fentry%2F20080515%2F1210858198\" title=\"list?\u306e\u5b9f\u88c5\u306b\u3064\u3044\u3066\u8003\u3048\u308b - Guyon Diary\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","published":"2008-05-15 22:29:58","title":"list?\u306e\u5b9f\u88c5\u306b\u3064\u3044\u3066\u8003\u3048\u308b","type":"rich","image_url":null,"provider_url":"https://hatena.blog","url":"https://guyon.hatenablog.jp/entry/20080515/1210858198","author_name":"guyon","description":"\u672c\u65e5\u306e\u53d6\u308a\u7d44\u307f\u3002 list?\u3068\u306f\uff08\u4f8b\u984c\u306e\uff09 \u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0Gauche\u306e46P\u8a18\u8f09\u3088\u308a list?\u624b\u7d9a\u304d (define (list? obj) (or (null? obj) (and (pair? obj) (list? (cdr obj))))) \u6b63\u5f0f\u306a\u30ea\u30b9\u30c8\u306e\u5b9a\u7fa9(list?\u306e\u5b9f\u88c5\u5185\u5bb9) \u7a7a\u30ea\u30b9\u30c8\u306f\u6b63\u5f0f\u306a\u30ea\u30b9\u30c8\u3067\u3042\u308b\u3002 \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u5bfe\u3067\u3042\u308a\u3001\u305d\u306ecdr\u304c\u6b63\u5f0f\u306a\u30ea\u30b9\u30c8\u3067\u3042\u308c\u3070\u3001\u305d\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3082\u6b63\u5f0f\u306a\u30ea\u30b9\u30c8\u3067\u3042\u308b\u3002 \u3053\u306e\u624b\u7d9a\u304d\u300clist?\u300d\u306f\u5f15\u6570\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u6b63\u5f0f\u306a\u30ea\u30b9\u30c8\u304b\u3069\u3046\u304b\u78ba\u304b\u3081\u308b\u3068\u3044\u3046\u3082\u306e\u3067\u3059\u3002 5\u3064\u306e\u624b\u7d9a\u304d*1\u306e\u5229\u7528\u4f8b\u306a\u306e\u3067\u3001\u5faa\u74b0\u30ea\u30b9\u30c8\u306b\u306f\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u3068\u3044\u3046\u6761\u4ef6\u3064\u304d\u3067\u3059\u3002\u2026"}