{"image_url":null,"version":"1.0","width":"100%","description":"30\u5206\u30d7\u30ed\u30b0\u30e9\u30e0\u3001\u305d\u306e670\u3002Writer\u30e2\u30ca\u30c9\u3092\u8a66\u3057\u3066\u307f\u307e\u3057\u305f\u3002 \u524d\u56de\u304cReader\u30e2\u30ca\u30c9\u3060\u3063\u305f\u306e\u3067\u3001\u4eca\u56de\u306fWriter\u30e2\u30ca\u30c9\u3092\u8a66\u3057\u3066\u307f\u307e\u3057\u305f\u3002 The Writer monad\u306b\u306f\u3001Writer\u30e2\u30ca\u30c9\u306f\u88cf\u3067\u30ed\u30b0\u3092\u3068\u3063\u305f\u308a\u3059\u308b\u306e\u306b\u4fbf\u5229\u3060\u3068\u66f8\u3044\u3066\u3042\u3063\u305f\u306e\u3067\u3001\u95a2\u6570\u306e\u547c\u3073\u51fa\u3057\u3092\u8a18\u9332\u3057\u3066\u307f\u307e\u3057\u305f\u3002 \u4f7f\u3044\u65b9 *Main> runWriter $ fib 10 (55,[\"fib(10)\", \"fib(9)\", \"fib(8)\", \"fib(7)\", \"fib(6)\", \"fib(5)\", \"fib(4)\", \"fib(3)\", \"fib(2)\", \"fib(2)\", \"fib(3)\", \"fib(2)\u2026","categories":["Haskell","30\u5206\u30d7\u30ed\u30b0\u30e9\u30e0"],"blog_url":"https://mzp.hatenadiary.org/","blog_title":"\u307f\u305a\u3074\u30fc\u65e5\u8a18","url":"https://mzp.hatenadiary.org/entry/20091001/writer","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fmzp.hatenadiary.org%2Fentry%2F20091001%2Fwriter\" title=\"Writer\u30e2\u30ca\u30c9\u3092\u8a66\u3057\u3066\u307f\u305f - \u307f\u305a\u3074\u30fc\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_url":"https://blog.hatena.ne.jp/mzp/","height":"190","published":"2009-10-01 00:00:00","type":"rich","author_name":"mzp","provider_url":"https://hatena.blog","title":"Writer\u30e2\u30ca\u30c9\u3092\u8a66\u3057\u3066\u307f\u305f"}