{"version":"1.0","height":"190","provider_name":"Hatena Blog","width":"100%","categories":["rails","ruby"],"url":"https://rubyandrails.hatenablog.com/entry/snippets","description":"a ||= b \u3068 a || b a \u304c nil \u306a\u3089\u521d\u671f\u5024\u3092\u5165\u308c\u305f\u3044\u5834\u5408\u3002 a = nil a = 100 if a.nil? # => 100 \u306f a = nil a ||= 100 #=> 100 \u3068\u66f8\u3051\u307e\u3059\u3002\u901a\u79f0 nil \u30ac\u30fc\u30c9\u3002 nil \u30ac\u30fc\u30c9\u306e\u9006\u3002\u3059\u3067\u306b\u5024\u304c\u5165\u3063\u3066\u3044\u308b\u5834\u5408\u306b\u66f8\u304d\u63db\u3048\u305f\u3044\u306a\u3089\u3002 a = 100 a = 200 if a.present? #=> 200 \u306f a = 100 a || 200 #=> 200 \u3068\u66f8\u3051\u307e\u3059\u3002a \u304c nil \u306a\u3089 nil \u306e\u307e\u307e\u3002 Rails.root Rails.root.join('tmp', 'foo', 'bar') \u306f Rails.\u2026","blog_title":"Ruby and Rails","author_name":"oooooooo","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Frubyandrails.hatenablog.com%2Fentry%2Fsnippets\" title=\"Ruby \u3068 Rails \u306e\u4fbf\u5229\u306a\u66f8\u304d\u65b9 - Ruby and Rails\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_url":"https://blog.hatena.ne.jp/oooooooo/","published":"2015-05-15 15:34:46","provider_url":"https://hatena.blog","title":"Ruby \u3068 Rails \u306e\u4fbf\u5229\u306a\u66f8\u304d\u65b9","type":"rich","blog_url":"https://rubyandrails.hatenablog.com/","image_url":null}