{"author_name":"fujikawa-y","width":"100%","url":"https://fujiyasu.hatenablog.com/entry/2025/11/18/213837","type":"rich","author_url":"https://blog.hatena.ne.jp/fujikawa-y/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ffujiyasu.hatenablog.com%2Fentry%2F2025%2F11%2F18%2F213837\" title=\"\u3010Ruby\u3011Ruby \u518d\u5b66\u7fd2 No.55 | Object#instance_variable_defined? - Yassan Tech Blog\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","image_url":null,"published":"2025-11-18 21:38:37","blog_title":"Yassan Tech Blog","provider_name":"Hatena Blog","blog_url":"https://fujiyasu.hatenablog.com/","categories":["Ruby"],"height":"190","version":"1.0","provider_url":"https://hatena.blog","description":"\u306f\u3058\u3081\u306b \u76ee\u306b\u3064\u3044\u305fRuby\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u8abf\u67fb\u3059\u308b\u3002 \u8a73\u7d30 Object#instance_variable_defined? \u30c9\u30ad\u30e5\u30e1\u30f3\u30c8 Object#instance_variable_defined? (Ruby 3.4 \u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u30de\u30cb\u30e5\u30a2\u30eb)","title":"\u3010Ruby\u3011Ruby \u518d\u5b66\u7fd2 No.55 | Object#instance_variable_defined?"}