{"version":"1.0","categories":["Ruby"],"height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftbpgr.hatenablog.com%2Fentry%2F20130702%2F1372775693\" title=\" \u30e1\u30bf\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0Ruby | \u30a4\u30c7\u30a3\u30aa\u30e0 | nil\u30ac\u30fc\u30c9 - Tbpgr Blog\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","width":"100%","provider_url":"https://hatena.blog","published":"2013-07-02 23:34:53","blog_url":"https://tbpgr.hatenablog.com/","title":" \u30e1\u30bf\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0Ruby | \u30a4\u30c7\u30a3\u30aa\u30e0 | nil\u30ac\u30fc\u30c9","provider_name":"Hatena Blog","image_url":null,"url":"https://tbpgr.hatenablog.com/entry/20130702/1372775693","type":"rich","author_name":"tbpg","author_url":"https://blog.hatena.ne.jp/tbpg/","blog_title":"Tbpgr Blog","description":"\u6982\u8981 nil\u30ac\u30fc\u30c9 \u5185\u5bb9 nil\u30ac\u30fc\u30c9\u3068\u306f\u4ee5\u4e0b\u306e\u69d8\u306a\u8a18\u6cd5\u3067\u3059\u3002 hoge ||= [] \u3053\u308c\u306f\u5b9f\u969b\u306b\u610f\u5473\u3059\u308b\u3068\u3053\u308d\u306f\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3067\u3059\u3002 if hoge != nil hoge = hoge else hoge = [] end \u30b5\u30f3\u30d7\u30eb # encoding: UTF-8 require \"pp\" def nil_gard(value) return value ||= [] end def not_nil_gard(value) value if value != nil [] end [[1,2,3],nil].each do |item| pp item print \"nil_gard=\u2026"}