{"categories":["Ruby","\u30e1\u30e2"],"url":"https://pumpkin.hatenablog.jp/entry/20090519/1242752019","blog_title":"\u30d1\u30f3\u30d7\u30ad\u30f3\u30b9\u30d1\u30a4\u30b9\u30e9\u30c6","provider_url":"https://hatena.blog","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fpumpkin.hatenablog.jp%2Fentry%2F20090519%2F1242752019\" title=\"Ruby\u3067\u4e8c\u6b21\u5143\u30cf\u30c3\u30b7\u30e5\u306e\u5b58\u5728\u78ba\u8a8d - \u30d1\u30f3\u30d7\u30ad\u30f3\u30b9\u30d1\u30a4\u30b9\u30e9\u30c6\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"\u81ea\u5206\u30e1\u30e2\u3002 \u25a0hash['hogehoge']['fugafuga']\u306e\u5b58\u5728\u78ba\u8a8d\u3092\u3059\u308b\u3002 defined?\u3092\u4f7f\u3046\u3002 if defined? hash['hogehoge']['fugafuga'] then puts \"\u3042\u308a\" else puts \"\u306a\u3057\" end \u4e09\u9805\u6f14\u7b97\u5b50\u3092\u4f7f\u3063\u3066\u66f8\u304f\u306a\u3089\u3053\u3046\u3002 puts defined?(hash['hogehoge']['fugafuga']) ? \"\u3042\u308a\" : \"\u306a\u3057\" defined?()\u306e\u3088\u3046\u306b\u4e09\u9805\u6f14\u7b97\u5b50\u3067\u306f()\u304c\u5fc5\u8981\u3002 \u52d8\u9055\u3044\u3057\u3066\u3044\u307e\u3057\u305f\u3002 \u30b3\u30e1\u30f3\u30c8\u3088\u308a defined?\u306f\u300c\u5f0f\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u306a\u3051\u308c\u3070\u507d\u300d\u306a\u306e\u3067\u3001\u30a8\u30e9\u30fc\u306a\u304f\u5f0f\u304c\u5b9f\u884c\u3067\u304d\u308b\u72b6\u614b\u3067\u3042\u308c\u3070\u2026","version":"1.0","blog_url":"https://pumpkin.hatenablog.jp/","author_url":"https://blog.hatena.ne.jp/takeru-c/","type":"rich","width":"100%","title":"Ruby\u3067\u4e8c\u6b21\u5143\u30cf\u30c3\u30b7\u30e5\u306e\u5b58\u5728\u78ba\u8a8d","provider_name":"Hatena Blog","published":"2009-05-19 01:53:39","author_name":"takeru-c","image_url":null}