{"author_url":"https://blog.hatena.ne.jp/rinu/","image_url":"http://cdn-ak.f.st-hatena.com/images/fotolife/r/rinu/20130301/20130301014000.png","blog_title":"rinu's blog","provider_name":"Hatena Blog","provider_url":"https://hatena.blog","author_name":"rinu","width":"100%","published":"2013-03-01 02:07:56","description":"\u8ffd\u8a18 3/24 \u30b3\u30e1\u30f3\u30c8\u3067\u3054\u6307\u6458\u9802\u3044\u305f\u3068\u304a\u308a\u3001 Scala \u3067\u306f null \u3088\u308a\u3082 Option \u3092\u4f7f\u3046\u65b9\u304c\u671b\u307e\u3057\u3044\u3068\u601d\u3044\u307e\u3059\u3002 \u3053\u306e\u8a18\u4e8b\u306f\u3001 Java \u3068 Scala \u4e21\u65b9\u3092\u4f7f\u3063\u305f\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u3044\u3066\u3044\u308b\u6642\u306b\u3001 null \u3092\u6271\u3046\u5fc5\u8981\u304c\u3042\u3063\u3066\u60aa\u6226\u82e6\u95d8\u3057\u3066\u3044\u305f\u6642\u306e\u8a18\u9332\u3067\u3059(*\u30ce\u03c9\u30ce*)Option \u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u69d8\u306a\u30d6\u30ed\u30b0\u304c\u53c2\u8003\u306b\u306a\u308a\u307e\u3059\u30fc http://yuroyoro.hatenablog.com/entry/20100710/1278763193 Scala \u3067\u578b\u30d1\u30e9\u30e1\u30fc\u30bf T \u578b\u306e\u95a2\u6570\u304b\u3089 null \u3092\u8fd4\u3057\u305f\u3044\u6642\u3064\u307e\u308a\u3001\u3053\u3093\u306a\u3053\u3068\u304c\u3057\u305f\u3044\u6642\u3001 def foo[T](t: T): T =\u2026","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Frinu.hatenablog.com%2Fentry%2F2013%2F03%2F01%2F020756\" title=\"Scala \u3068 null \u3068 \u578b\u30d1\u30e9\u30e1\u30fc\u30bf - rinu&#39;s blog\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","type":"rich","title":"Scala \u3068 null \u3068 \u578b\u30d1\u30e9\u30e1\u30fc\u30bf","blog_url":"https://rinu.hatenablog.com/","version":"1.0","categories":["scala","\u306f\u307e\u3063\u305f"],"url":"https://rinu.hatenablog.com/entry/2013/03/01/020756"}