{"blog_url":"https://www.sakatakoichi.com/","author_url":"https://blog.hatena.ne.jp/jyukutyo/","author_name":"jyukutyo","provider_name":"Hatena Blog","url":"https://www.sakatakoichi.com/entry/20081105/1225873361","version":"1.0","description":"One Div Zero: Monads are Elephants Part 1\u306e\u7ffb\u8a33\u7d9a\u304d\u3002 \u30e4\u30d0\u3044\uff01\u3053\u3053\u306f\u8d85\u308f\u304b\u308a\u3084\u3059\u3044\uff01 \u30e2\u30ca\u30c9\u3067\u56f0\u3063\u3066\u308b\u4eba\u306f\u30bc\u30d2\uff01\u304a\u3059\u3059\u3081\uff01 bind\u3068\u304bflatMap\u306e\u5f79\u5272\u304c\u308f\u304b\u3063\u3066\u304d\u305f\uff01 Monads are Combinable(\u30e2\u30ca\u30c9\u306f\u7d50\u5408\u53ef\u80fd\u3060) Now let's say we have a configuration library that let's us fetch parameters. \u3055\u3042\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u30d5\u30a7\u30c3\u30c1\u3059\u308b\u8a2d\u5b9a\u30e9\u30a4\u30d6\u30e9\u30ea\u306b\u3064\u3044\u3066\u8a71\u3057\u307e\u3057\u3087\u3046\u3002For any parameter we'll get back an Option[String\u2026","provider_url":"https://hatena.blog","width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.sakatakoichi.com%2Fentry%2F20081105%2F1225873361\" title=\"\u30e2\u30ca\u30c9\u306b\u3064\u3044\u3066\u8abf\u3079\u3066\u3044\u304f(10) - Fight the Future\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"\u30e2\u30ca\u30c9\u306b\u3064\u3044\u3066\u8abf\u3079\u3066\u3044\u304f(10)","image_url":null,"type":"rich","published":"2008-11-06 10:22:41","height":"190","blog_title":"Fight the Future","categories":["programming"]}