{"description":"\u4f55\u6545 sprintf \u3067\u51fa\u6765\u306a\u3044\u306e\u3060\u308d\u3046\u304b\u3002\u3002 open System; let fn (x:int) = String.Format(\"{0:#,#}\", x);; let fn x = let cc = [| \"\"; \"\"; \"\"; \",\"; |] let rec fn' x (s:string) = if x <= 0 then s else fn' (x/10) ((string (x%10)) + cc.[s.Length % 4] + s) fn' x \"\";; let fn (x:int) = let cc = [| \",\"; \"\"; \"\"; |] (string x).ToCh\u2026","author_name":"regerege","title":"\u6574\u6570\u3092\u30ab\u30f3\u30de\u533a\u5207\u308a\u306e\u6587\u5b57\u5217\u3067\u53d6\u5f97","author_url":"https://blog.hatena.ne.jp/regerege/","type":"rich","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fregerege.hatenadiary.org%2Fentry%2F20120112%2F1326345131\" title=\"\u6574\u6570\u3092\u30ab\u30f3\u30de\u533a\u5207\u308a\u306e\u6587\u5b57\u5217\u3067\u53d6\u5f97 - regerege \u30e1\u30e2\u5e33\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_url":"https://hatena.blog","version":"1.0","published":"2012-01-12 14:12:11","categories":["F#"],"url":"https://regerege.hatenadiary.org/entry/20120112/1326345131","width":"100%","blog_title":"regerege \u30e1\u30e2\u5e33","provider_name":"Hatena Blog","blog_url":"https://regerege.hatenadiary.org/","height":"190"}