{"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftakehikom.hateblo.jp%2Fentry%2F20100913%2F1284318992\" title=\" nil\u30ac\u30fc\u30c9 - \u308f\u3055\u3063\u304dhb\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_url":"https://hatena.blog","provider_name":"Hatena Blog","title":" nil\u30ac\u30fc\u30c9","description":"Ruby\u306b\u304a\u3044\u3066\uff0c\u300c||=\u300d\u6f14\u7b97\u5b50\u3092\u4f7f\u3046\u3053\u3068\u306e\u610f\u7fa9\u306f\u5206\u304b\u308b\u3057\uff0c\u81ea\u5206\u3067\u3082\u3088\u304f\u4f7f\u3046\u306e\u3067\u3059\u304c\u2026 \u4ed6\u4eba\u306e\u30b3\u30fc\u30c9\u3092\u898b\u305fRuby\u521d\u5fc3\u8005\u306e\u591a\u304f\u306f\uff0c\u3053\u306e\u98a8\u5909\u308f\u308a\u306a\u30a4\u30c7\u30a3\u30aa\u30e0\u306b\u56f0\u60d1\u3059\u308b\uff0e a ||= [] \u3053\u308c\u306f\uff0ca\u306e\u5024\u304c\u7a7a\u306e\u914d\u5217\u306b\u306a\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u3068\u3044\u3046\u610f\u5473\u3060\uff0e||=\u306f\u4ee5\u4e0b\u3092\u7701\u7565\u3057\u305f\u69cb\u6587\u3067\u3042\u308b\uff0e a = a || [] \u3053\u306e\u30b3\u30fc\u30c9\u3092\u7406\u89e3\u3059\u308b\u306b\u306f\uff0c\u3053\u306eOR\u6f14\u7b97\u5b50\uff08||\uff09\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u7406\u89e3\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\uff0e||\u6f14\u7b97\u5b50\u306f\uff0c\u88ab\u6f14\u7b97\u5b50\u306e\u3044\u305a\u308c\u304b\u304ctrue\u3067\u3042\u308c\u3070\uff0ctrue\u3092\u8fd4\u3059\uff0e nil\u3068false\u4ee5\u5916\u306e\u5024\u306f\u3059\u3079\u3066true\u306b\u306a\u308b\u3053\u3068\u3092\u899a\u3048\u3066\u304a\u3044\u3066\u307b\u3057\u3044\uff0e\u6700\u521d\u306e\u88ab\u6f14\u7b97\u5b50\u304ctrue\u306a\u3089\uff0c||\u6f14\u7b97\u5b50\u306ftrue\u3092\u8fd4\u3059\uff0efalse\u306a\u2026","width":"100%","author_url":"https://blog.hatena.ne.jp/takehikom/","type":"rich","blog_title":"\u308f\u3055\u3063\u304dhb","version":"1.0","image_url":null,"categories":["Ruby"],"blog_url":"https://takehikom.hateblo.jp/","height":"190","author_name":"takehikom","url":"https://takehikom.hateblo.jp/entry/20100913/1284318992","published":"2010-09-13 04:16:32"}