{"title":"\u4e26\u3093\u3060\u30bf\u30a4\u30eb\u306e\u5857\u308a\u65b9\u306f\u4f55\u901a\u308a\u304b\u3068\u3044\u3046\u30d1\u30ba\u30eb\u3092\u89e3\u304f","author_url":"https://blog.hatena.ne.jp/obelisk2/","image_url":null,"description":"qiita.com \u554f\u984c 9\u500b\u306e\u767d\u30de\u30b9\u304c\u6a2a\u4e00\u5217\u306b\u4e26\u3093\u3067\u3044\u307e\u3059\u3002\u3053\u306e\u3046\u3061\u3001\u3044\u304f\u3064\u304b\u306e\u767d\u30de\u30b9\u3092\u9ed2\u304f\u5857\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u5c11\u306a\u304f\u3068\u3082\u4e00\u3064\u306f\u9ed2\u304f\u5857\u308a\u3001\u307e\u305f\u3001\u9ed2\u30de\u30b9\u304c\u9023\u7d9a\u3059\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002 \u3053\u306e\u3068\u304d\u3001\u5857\u308a\u65b9\u306f\u5168\u90e8\u3067\u4f55\u901a\u308a\u3042\u308b\u3067\u3057\u3087\u3046\u3002 Ruby \u3067\u89e3\u3044\u3066\u307f\u305f index: \u5de6\u304b\u3089\u4f55\u30de\u30b9\u76ee\u304b pred: \u5de6\u96a3\u308a\u306e\u8272\uff08\u5de6\u7aef\u306e\u5834\u5408\u306f nil\uff09\u518d\u5e30\u3092\u4f7f\u3063\u3066\u3044\u307e\u3059\u3002 def paint(index, pred = nil) return 1 if index == 9 s = 0 if index.zero? || pred == :white s += paint(index + 1, :white) s +=\u2026","published":"2024-12-15 23:04:14","url":"https://obelisk.hatenablog.com/entry/2024/12/15/230414","version":"1.0","blog_title":"Camera Obscura","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fobelisk.hatenablog.com%2Fentry%2F2024%2F12%2F15%2F230414\" title=\"\u4e26\u3093\u3060\u30bf\u30a4\u30eb\u306e\u5857\u308a\u65b9\u306f\u4f55\u901a\u308a\u304b\u3068\u3044\u3046\u30d1\u30ba\u30eb\u3092\u89e3\u304f - Camera Obscura\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_name":"obelisk2","categories":["Ruby","\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u30fb\u30d1\u30ba\u30eb"],"width":"100%","provider_name":"Hatena Blog","blog_url":"https://obelisk.hatenablog.com/","type":"rich","provider_url":"https://hatena.blog","height":"190"}