{"provider_url":"https://hatena.blog","title":"\u30e2\u30ca\u30c9\u306b\u3064\u3044\u3066\u8abf\u3079\u3066\u3044\u304f(20)","categories":["programming"],"version":"1.0","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.sakatakoichi.com%2Fentry%2F20081110%2F1226282867\" title=\"\u30e2\u30ca\u30c9\u306b\u3064\u3044\u3066\u8abf\u3079\u3066\u3044\u304f(20) - 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>","author_url":"https://blog.hatena.ne.jp/jyukutyo/","author_name":"jyukutyo","blog_url":"https://www.sakatakoichi.com/","blog_title":"Fight the Future","width":"100%","published":"2008-11-11 04:07:47","image_url":null,"provider_name":"Hatena Blog","description":"One Div Zero: Monads are Elephants Part 3\u306e\u7ffb\u8a33\u7d9a\u304d\u3002 \u3053\u308c\u3067\u30d1\u30fc\u30c83\u306f\u7d42\u4e86\u3002 The Second Zero Law: M to Zero in Nothing Flat(\u7b2c2\u306e\u30bc\u30ed\u306e\u6cd5\u5247\uff1a\u3059\u3050\u306bM\u3092\u30bc\u30ed\u306b\u3059\u308b) The reverse of the zero identity law looks like this\u30bc\u30ed\u306e\u540c\u4e00\u6cd5\u5247\u3092\u9006\u306b\u3059\u308b\u3068\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002 MZ2. m flatMap {x => mzero} \u2261 mzero Basically this says that replacing everything with nothing r\u2026","height":"190","url":"https://www.sakatakoichi.com/entry/20081110/1226282867","type":"rich"}