{"blog_url":"https://sirocco.hatenadiary.org/","type":"rich","author_name":"sirocco","author_url":"https://blog.hatena.ne.jp/sirocco/","title":"let \u5f0f","provider_name":"Hatena Blog","image_url":null,"blog_title":"sirocco \u306e\u66f8\u3044\u3066\u3082\u3059\u3050\u306b\u5fd8\u308c\u308b\u30e1\u30e2","categories":["Haskell"],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fsirocco.hatenadiary.org%2Fentry%2F20100423%2F1271989748\" title=\"let \u5f0f - sirocco \u306e\u66f8\u3044\u3066\u3082\u3059\u3050\u306b\u5fd8\u308c\u308b\u30e1\u30e2\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0 Haskell \u7b2c8\u7ae0 \u95a2\u6570\u578b\u30d1\u30fc\u30b5\u30fc\u306b\u4f7f\u308f\u308c\u3066\u3044\u308b string \u95a2\u6570\u306b\u3064\u3044\u3066\u8a33\u8005\u304c\u89e3\u8aac\u3057\u3066\u3044\u3066\u3001\u305d\u306e\u4e2d\u306b let ... in ...\u3068\u3044\u3046\u8868\u73fe\u304c\u51fa\u3066\u304d\u307e\u3057\u305f\u3002\u4f7f\u3063\u305f\u3053\u3068\u304c\u306a\u3044\u306e\u3067\u8abf\u3079\u3066\u307f\u307e\u3057\u305f\u3002 -- let sum2 :: (Num a) => [a] -> a sum2 xs = let sum' [] work = work sum' (y:ys) work = sum' ys (y + work) in sum' xs 0 sum3 :: (Num a) => [a] -> a sum3 [] = 0 sum3 (x:xs) = x + (sum3 xs) ghc\u2026","version":"1.0","provider_url":"https://hatena.blog","height":"190","url":"https://sirocco.hatenadiary.org/entry/20100423/1271989748","width":"100%","published":"2010-04-23 11:29:08"}