{"categories":["Haskell","30\u5206\u30d7\u30ed\u30b0\u30e9\u30e0"],"blog_url":"https://mzp.hatenadiary.org/","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fmzp.hatenadiary.org%2Fentry%2F20090923%2Freader\" title=\"Reader\u30e2\u30ca\u30c9\u3092\u8a66\u3057\u3066\u307f\u308b - \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>","provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/mzp/","author_name":"mzp","height":"190","blog_title":"\u307f\u305a\u3074\u30fc\u65e5\u8a18","version":"1.0","width":"100%","type":"rich","published":"2009-09-23 00:00:00","description":"30\u5206\u30d7\u30ed\u30b0\u30e9\u30e0\u3001\u305d\u306e663\u3002Reader\u30e2\u30ca\u30c9\u3092\u8a66\u3057\u3066\u307f\u307e\u3057\u305f\u3002 The Reader monad\u3092\u8aad\u3093\u3067\u305f\u3089\u3001\u74b0\u5883\u304c\u3069\u3046\u306e\u3053\u3046\u306e\u66f8\u3044\u3066\u3042\u3063\u305f\u306e\u3067\u3001\u7c21\u5358\u306a\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u3092\u4f5c\u3063\u3066\u307f\u307e\u3057\u305f\u3002\u74b0\u5883\u304c\u4f7f\u3044\u305f\u304b\u3063\u305f\u3060\u3051\u306a\u306e\u3067\u3001\u5909\u6570\u675f\u7e1b\u3068\u5909\u6570\u53c2\u7167\u306e\u307b\u304b\u306b\u306f\u3001\u6574\u6570\u30ea\u30c6\u30e9\u30eb\u3068\u52a0\u7b97\u6f14\u7b97\u5b50\u3050\u3089\u3044\u3057\u304b\u3042\u308a\u307e\u305b\u3093\u3002\u524d\u306b\u8aad\u3093\u3060Haskell\u306e\u5165\u9580\u66f8\u306b\u306f\u300c\u8907\u6570\u306e\u95a2\u6570\u3067\u5f15\u6570\u3092\u5171\u6709\u3057\u305f\u3044\u3068\u304d\u306fReader\u30e2\u30ca\u30c9\u3092\u4f7f\u3046\u3068\u3044\u3044\u3088\u30fc\u300d\u3068\u66f8\u3044\u3066\u3042\u3063\u305f\u3051\u3069\u3001\u5fae\u5999\u306b\u9055\u3046\u6c17\u304c\u3059\u308b\u3002\u5171\u6709\u3067\u304d\u308b\u306e\u306f\u5f15\u6570\u4e00\u500b\u3060\u3051\u3060\u3057\u3001\u5171\u6709\u3057\u3066\u308b\u5909\u6570\u3092\u66f8\u304d\u63db\u3048\u308b\u3053\u3068\u3082\u3067\u304d\u308b\u3057\u3002 \u4f7f\u3044\u65b9 *Main> runEval $ Int 40 `Add` Int 2\u2026","provider_name":"Hatena Blog","url":"https://mzp.hatenadiary.org/entry/20090923/reader","title":"Reader\u30e2\u30ca\u30c9\u3092\u8a66\u3057\u3066\u307f\u308b"}