{"image_url":null,"author_url":"https://blog.hatena.ne.jp/lethevert/","published":"2006-04-18 00:00:00","provider_name":"Hatena Blog","url":"https://lethevert.hatenadiary.org/entry/20060418/p1","title":"quiz : f (f x) ==> -x","author_name":"lethevert","blog_url":"https://lethevert.hatenadiary.org/","width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Flethevert.hatenadiary.org%2Fentry%2F20060418%2Fp1\" title=\"quiz : f (f x) ==&gt; -x - lethevert is a programmer\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_title":"lethevert is a programmer","version":"1.0","categories":["\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0"],"provider_url":"https://hatena.blog","type":"rich","description":"(define (gen_f) (let ((a0 0)) (lambda (x) (let ((a a0)) (set! a0 x) (- a))))) (define f (gen_f))\u3042\u3001\u3044\u3084\u3001\u305d\u3046\u3044\u3046\u8a71\u3067\u306f\u306a\u3044\u3067\u3059\u304b\u30fb\u30fb\u30fb - \u3053\u308c\u306f\u3001\u307e\u3042\u3001\u534a\u5206\u30cd\u30bf\u306a\u306e\u3067\u3059\u304c\u3001\u591a\u5206\u3001\u4e00\u5fdc\u3001\u5de5\u5b66\u7684\uff08\u5236\u5fa1\u5de5\u5b66\u3068\u304b\uff09\u306b\u306f\u3042\u308b\u7a0b\u5ea6\u306e\u610f\u5473\u306e\u3042\u308b\u624b\u7d9a\u304d\u306a\u3093\u3058\u3083\u306a\u3044\u304b\u3068\u304b\u601d\u3044\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u9045\u308c\u306e\u3042\u308b\u7cfb\u3067\u3059\u3002\u307e\u3042\u3001\u6570\u5b66\u7684\u306a\u95a2\u6570\u3067\u306f\u306a\u3044\u306e\u3067\u3059\u304c\u3002 - \u666e\u901a\u306b\u6570\u5b66\u7684\u306a\u5b9a\u5f0f\u5316\u3092\u3059\u308b\u5834\u5408\u306f\u3001\u3069\u3046\u3059\u308c\u3070\u3044\u3044\u306e\u3060\uff1f \u2190 \u52c9\u5f37\u4e0d\u8db3 Clean\u3067\u96e2\u6563\u7684\u306b\u66f8\u3051\u3070\u3053\u3046\u3044\u3046\u4e8b\u306a\u3093\u3060\u3051\u3069\u30fb\u30fb\u30fb F :: [Real] -> [Real] \u2026","height":"190"}