{"description":"\u570f\u8ad6\u306e\u6700\u5927\u306e\u6b66\u5668\u306f\u30c0\u30a4\u30a2\u30b0\u30e9\u30e0\u306a\u306e\u3067\u3001\u30e2\u30ca\u30c9\u3067\u609f\u308a\u3092\u3072\u3089\u304d\u305f\u3044\u306e\u306a\u3089\u30c0\u30a4\u30a2\u30b0\u30e9\u30e0\u3092\u4f7f\u3048\u3070\u3044\u3044\u3093\u3058\u3083\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002 \u30c0\u30a4\u30a2\u30b0\u30e9\u30e0\u306e\u66f8\u304d\u65b9 \u4f8b\u3048\u3070\u3001\u300c f :: a -> b \u300d\u3068\u304b\u300clength :: [a] -> Int\u300d\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u304d\u307e\u3059\u3002\u578b\u3092\u70b9\u3067\u3001\u95a2\u6570\u3092\u77e2\u5370\u3067\u66f8\u304d\u307e\u3059\u3002 \u30c0\u30a4\u30a2\u30b0\u30e9\u30e0\u306e\u5229\u70b9\u306f\u3001f\u3084length\u306e\u4e2d\u8eab\u3092\u5fd8\u308c\u3066\u7c21\u7565\u5316\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3053\u3068\u3067\u3059\u3002\u4eba\u9593\u306e\u8133\u304c\u3067\u304d\u308b\u3053\u3068\u306b\u306f\u9650\u308a\u304c\u3042\u308b\u306e\u3067\u3001\u6ce8\u76ee\u3059\u308b\u60c5\u5831\u304c\u5c11\u306a\u3044\u65b9\u304c\u7406\u89e3\u3057\u3084\u3059\u304f\u306a\u308b\u3063\u3066\u30b9\u30f3\u30dd\u30fc\u3067\u3059\u3002\u306a\u304a\u3001 \u5408\u6210 g . f \u306f\u56f3\u793a\u3059\u308b\u6642\u306b\u9806\u304c\u9006\u306b\u306a\u308b\u306e\u3067\u6c17\u3092\u3064\u3051\u3066\u4e0b\u3055\u3044\u3002\u3053\u308c\u306f\u3001\u5408\u6210\u95a2\u6570\u306e\u9069\u7528\u304c g ( f x ) \u3068\u66f8\u3051\u308b\u3053\u3068\u306b\u7531\u2026","published":"2009-10-30 23:36:23","categories":["Haskell","\u6570\u5b66","Monad"],"blog_title":"Pixel Pedals of Tomakomai","width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhiratara.hatenadiary.jp%2Fentry%2F20091030%2F1256913383\" title=\"\u30e2\u30ca\u30c9\u3067\u609f\u308a\u3092\u3072\u3089\u304d\u305f\u3044\u306e\u306a\u3089 - \u56f3\u3067\u308f\u304b\u308b(?)\u30e2\u30ca\u30c9 - Pixel Pedals of Tomakomai\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","height":"190","type":"rich","provider_url":"https://hatena.blog","blog_url":"https://hiratara.hatenadiary.jp/","title":"\u30e2\u30ca\u30c9\u3067\u609f\u308a\u3092\u3072\u3089\u304d\u305f\u3044\u306e\u306a\u3089 - \u56f3\u3067\u308f\u304b\u308b(?)\u30e2\u30ca\u30c9","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/h/hiratara/20091030/20091030232831.png","author_name":"hiratara","author_url":"https://blog.hatena.ne.jp/hiratara/","version":"1.0","provider_name":"Hatena Blog","url":"https://hiratara.hatenadiary.jp/entry/20091030/1256913383"}