{"type":"rich","provider_url":"https://hatena.blog","title":"Ruby \u306e attr_reader \u306b\u5bfe\u3059\u308b\u7591\u554f","width":"100%","provider_name":"Hatena Blog","author_url":"https://blog.hatena.ne.jp/osyo-manga/","categories":["Ruby"],"description":"Ruby \u306e attr_reader \u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3046\u3068\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306b\u8aad\u307f\u8fbc\u307f\u5c02\u7528\u3067\u30a2\u30af\u30bb\u30b9\u3059\u308b\u4e8b\u304c\u3067\u304d\u307e\u3059\u3002 class X def initialize @data = { filename: \"test.txt\" } end attr_reader :data end x = X.new x.data # OK x.data[:fname] # OK x.data = {} # ERROR \u305f\u3060\u3057\u3001\u3053\u308c\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5909\u6570\u306b\u66f8\u304d\u8fbc\u3080\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u3060\u3051\u3067\u3001\u30a2\u30af\u30bb\u30c3\u30b5\u304c\u8fd4\u3057\u305f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u66f8\u304d\u63db\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 class X def initialize @data = { filen\u2026","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fsecret-garden.hatenablog.com%2Fentry%2F2015%2F04%2F28%2F224433\" title=\"Ruby \u306e attr_reader \u306b\u5bfe\u3059\u308b\u7591\u554f - Secret Garden(Instrumental)\" 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","blog_url":"https://secret-garden.hatenablog.com/","url":"https://secret-garden.hatenablog.com/entry/2015/04/28/224433","height":"190","image_url":null,"blog_title":"Secret Garden(Instrumental)","published":"2015-04-28 22:44:33","author_name":"osyo-manga"}