{"blog_title":"\u30c1\u30e5\u30fc\u30ea\u30f3\u30b0\u4e0d\u5b8c\u5168","provider_url":"https://hatena.blog","image_url":null,"type":"rich","author_url":"https://blog.hatena.ne.jp/aomori-ringo2/","description":"\u524d\u7ae0\u306b\u6bd4\u3079\u308b\u3068\u30ec\u30d9\u30eb\u4e0a\u304c\u3063\u305f\u5370\u8c61\u3002 import Data.Char(chr, ord, isLower, isUpper) -- 7.1 \u57fa\u672c\u6982\u5ff5 twice :: (a -> a) -> a -> a twice f x = f (f x) -- 7.2 \u30ea\u30b9\u30c8\u51e6\u7406 map :: (a -> b) -> [a] -> [b] map f xs = [f x | x <- xs] map f [] = [] map f (x:xs) = f x : map f xs filter :: (a -> Bool) -> [a] -> [a] filter p xs = [x | x <- xs,\u2026","published":"2012-07-01 21:14:17","author_name":"aomori-ringo2","version":"1.0","provider_name":"Hatena Blog","width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Faomoriringo.hateblo.jp%2Fentry%2F2012%2F07%2F01%2F211417\" title=\"\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0Haskell \u7b2c7\u7ae0 \u9ad8\u968e\u95a2\u6570 - \u30c1\u30e5\u30fc\u30ea\u30f3\u30b0\u4e0d\u5b8c\u5168\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","height":"190","title":"\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0Haskell \u7b2c7\u7ae0 \u9ad8\u968e\u95a2\u6570","blog_url":"https://aomoriringo.hateblo.jp/","url":"https://aomoriringo.hateblo.jp/entry/2012/07/01/211417","categories":["haskell","\u5199\u7d4c","\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0"]}