{"author_name":"tomotomo1129","blog_url":"https://job-info.hateblo.jp/","provider_name":"Hatena Blog","type":"rich","categories":["Ruby"],"height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fjob-info.hateblo.jp%2Fentry%2F2024%2F08%2F23%2F203804\" title=\"Ruby\u3067\u5909\u6570\u306e\u5b58\u5728\u30c1\u30a7\u30c3\u30af\u3092\u3059\u308b\u65b9\u6cd5 - Web\u958b\u767a\u306b\u304a\u3051\u308b\u77e5\u898b\u5171\u6709\u7cfb\u30da\u30fc\u30b8\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"Ruby\u3067\u5909\u6570\u306e\u5b58\u5728\u30c1\u30a7\u30c3\u30af\u3092\u3059\u308b\u65b9\u6cd5 Ruby\u3067\u5909\u6570\u306e\u5b58\u5728\u30c1\u30a7\u30c3\u30af\u3092\u3059\u308b\u65b9\u6cd5 Ruby\u3067\u5909\u6570\u306e\u5b58\u5728\u30c1\u30a7\u30c3\u30af\u3092\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u30021. defined?\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u7528 defined?\u30e1\u30bd\u30c3\u30c9\u306f\u3001\u5909\u6570\u3084\u30e1\u30bd\u30c3\u30c9\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u8abf\u3079\u308b\u305f\u3081\u306b\u4f7f\u3044\u307e\u3059\u3002 \u5909\u6570\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308c\u3070\u3001\u305d\u306e\u5909\u6570\u306e\u30bf\u30a4\u30d7\u3092\u6587\u5b57\u5217\u3067\u8fd4\u3057\u3001\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u306fnil\u3092\u8fd4\u3057\u307e\u3059\u3002 if defined?(variable) puts \"\u5909\u6570\u306f\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\" else puts \"\u5909\u6570\u306f\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u305b\u3093\" end 2. nil?\u30e1\u30bd\u30c3\u30c9\u306e\u4f7f\u7528 \u5909\u6570\u304cnil\u3067\u306a\u3044\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u306b\u306f\u3001nil?\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3044\u2026","version":"1.0","author_url":"https://blog.hatena.ne.jp/tomotomo1129/","title":"Ruby\u3067\u5909\u6570\u306e\u5b58\u5728\u30c1\u30a7\u30c3\u30af\u3092\u3059\u308b\u65b9\u6cd5","blog_title":"Web\u958b\u767a\u306b\u304a\u3051\u308b\u77e5\u898b\u5171\u6709\u7cfb\u30da\u30fc\u30b8","provider_url":"https://hatena.blog","url":"https://job-info.hateblo.jp/entry/2024/08/23/203804","published":"2024-08-23 20:38:04","width":"100%","image_url":null}