{"author_name":"DigitalGhost","version":"1.0","published":"2009-10-29 02:01:24","categories":["Haskell"],"provider_name":"Hatena Blog","height":"190","width":"100%","image_url":null,"blog_url":"https://dechimal.hatenadiary.com/","type":"rich","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fdechimal.hatenadiary.com%2Fentry%2F20091029%2F1256835684\" title=\"\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u6570\u5217\u3092\u30a2\u30ec\u3059\u308b - \u30c7-mk6\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_title":"\u30c7-mk6","url":"https://dechimal.hatenadiary.com/entry/20091029/1256835684","author_url":"https://blog.hatena.ne.jp/DigitalGhost/","title":"\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u6570\u5217\u3092\u30a2\u30ec\u3059\u308b","description":"\u30d5\u30a3\u30dc\u30ca\u30c3\u30c1\u6570\u5217 fib = 0:1:zipWith (+) fib (tail fib)\u3067\u3001\u3053\u308c\u3092\u65b0\u3057\u3044\u540d\u524d\u3092\u4f5c\u308b\u3053\u3068\u306a\u304f\u3001\u304b\u3064\u7121\u540d\u95a2\u6570\u3092\u66f8\u304b\u305a\u306b\u3084\u3063\u3066\u307f\u308b\u3002\u307e\u305a\u306f\u95a2\u6570\u306e\u5f62\u306b\u306a\u304a\u3059\u3002 fib = let fib' x y = x:fib' y (x+y) in fib' 0 1fib'\u306e\u30d1\u30bf\u30fc\u30f3\u3092\u66f8\u304b\u306a\u3044\u3088\u3046\u306b\u5909\u5f62\u3059\u308b\u3002 fib = let fib' = curry $ fst &&& (snd &&& uncurry (+) >>> uncurry fib') >>> uncurry (:) in fib' 0 1Arrow\u3055\u307e\u3055\u307e\u2026\u3002\u6b21\u306bfib'\u3092\u3001fix\u3068\u7121\u540d\u95a2\u6570\u4f7f\u3063\u3066\u5909\u5f62\u3002 (cur\u2026","provider_url":"https://hatena.blog"}