{"blog_url":"https://jmk.hatenadiary.org/","url":"https://jmk.hatenadiary.org/entry/20060506/p1","image_url":null,"title":" lua \u3067 Y \u30b3\u30f3\u30d3\u30cd\u30fc\u30bf","published":"2006-05-06 00:00:00","author_name":"jmk","provider_url":"https://hatena.blog","type":"rich","description":"\u3068\u3053\u308d\u3067 lua \u3067 Y \u30b3\u30f3\u30d3\u30cd\u30fc\u30bf\u3092\u66f8\u3044\u3066\u307f\u305f\u3002 function Y(f) return function(a) return f(Y(f), a); end; end f = Y(function(f, n) if n <= 0 then return 1 else return n*f(n-1); end; end) f(10) # => 3628800\u3075\u3080\u3075\u3080\u3002\u3053\u308c\u3092\u8907\u6570\u5f15\u6570\u306b\u3059\u308b\u306b\u306f\u3069\u3046\u3059\u308b\u304b\u3002\u3068\u308a\u3042\u3048\u305a\u53ef\u5909\u9577\u5f15\u6570\u3092\u5229\u7528\u3057\u3066\u307f\u308b\u304c\u3082\u3046\u3072\u3068\u3064\u4e0a\u624b\u304f\u306a\u3044\u3002\u3082\u3063\u3068\u826f\u3044\u624b\u304c\u3042\u308b\u6c17\u304c\u3059\u308b\u304c\u3001\u53ef\u5909\u9577\u5f15\u6570\u3092\u591a\u5024\u306b\u3057\u3066\u6e21\u3059\u65b9\u6cd5\u304c\u3088\u304f\u308f\u304b\u3089\u3093\u3002\u3044\u3063\u305f\u3093\u53ef\u5909\u9577\u5f15\u6570\u306b\u3057\u3066\u3057\u307e\u3046\u3068\u591a\u5024\u306b\u306f\u306a\u3089\u306a\u3044\u6c17\u304c\u3059\u2026","provider_name":"Hatena Blog","height":"190","width":"100%","categories":["lua"],"author_url":"https://blog.hatena.ne.jp/jmk/","blog_title":"jmk\u306e\u65e5\u8a18 - lua \u52c9\u5f37\u4e2d","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fjmk.hatenadiary.org%2Fentry%2F20060506%2Fp1\" title=\" lua \u3067 Y \u30b3\u30f3\u30d3\u30cd\u30fc\u30bf - jmk\u306e\u65e5\u8a18 - lua \u52c9\u5f37\u4e2d\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","version":"1.0"}