{"title":"Haskell \u3067\u306e Num \u306e\u578b\u30af\u30e9\u30b9\u306e\u95a2\u4fc2\u304c\u3088\u304f\u308f\u304b\u3089\u306a\u304b\u3063\u305f\u306e\u3067\u8abf\u3079\u305f","image_url":"http://a0.twimg.com/profile_images/1180979628/ViolinSpace_normal.png","categories":["haskell"],"description":"@alphaneet \u3055\u3093\u304c Haskell \u306e\u52c9\u5f37\u306e\u69d8\u5b50\u3092 Ust \u3057\u3066\u305f\u2193\u300cHaskell \u52c9\u5f37\u3057\u305f\u3044\u3001\u52c9\u5f37\u3057\u305f\u3044\u300d\u3068\u3044\u3044\u306a\u304c\u3089\u3001\u7d50\u5c40\u6700\u8fd1\u3042\u307e\u308a\u3084\u308c\u3066\u3044\u306a\u3044\u306e\u3092\u601d\u3044\u51fa\u3057\u3001\u81ea\u5206\u3082\u304a\u3082\u3080\u308d\u306b ghci \u3092\u7acb\u3061\u4e0a\u3052\u3066\u307f\u308b\u2193 let f 0 = 1 \u3068\u3044\u3046\u3068\u3066\u3082\u5358\u7d14\u306a\u95a2\u6570\u3092\u5b9a\u7fa9\u3057\u3066\u307f\u308b\u3002\u2193:type \u30b3\u30de\u30f3\u30c9\u3067\u305d\u308c\u306e\u578b\u3092\u8abf\u3079\u305f\u3089 f :: (Eq a, Num a, Num a1) => a -> a1 \u3063\u3066\u306a\u3063\u3066\u308b\u3002\u2193\u3042\u308c alphaneet \u3055\u3093\u306e\u3084\u3064\u3068\u9055\u3046\u30fb\u30fb\u30fb\uff1f\u3061\u306a\u307f\u306b\u81ea\u5206\u304c\u4eca\u8a66\u3057\u3066\u3044\u305f\u306e\u306f 7.3.20111021 (\u3053\u306e\u3068\u304d\u5165\u308c\u305f\u3082\u306e)\u2193\u306a\u305c\u304b\u81ea\u5206\u306ePC\u306b\u53e4\u3044version (6.12\u2026","height":"190","provider_name":"Hatena Blog","type":"rich","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fxuwei-k.hatenablog.com%2Fentry%2F20120123%2F1327325922\" title=\"Haskell \u3067\u306e Num \u306e\u578b\u30af\u30e9\u30b9\u306e\u95a2\u4fc2\u304c\u3088\u304f\u308f\u304b\u3089\u306a\u304b\u3063\u305f\u306e\u3067\u8abf\u3079\u305f - xuwei-k&#39;s blog\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","url":"https://xuwei-k.hatenablog.com/entry/20120123/1327325922","version":"1.0","width":"100%","blog_url":"https://xuwei-k.hatenablog.com/","published":"2012-01-23 22:38:42","author_name":"xuwei","blog_title":"xuwei-k's blog","provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/xuwei/"}