{"image_url":null,"width":"100%","provider_url":"https://hatena.blog","published":"2009-11-11 21:43:18","type":"rich","author_url":"https://blog.hatena.ne.jp/bleis-tift/","version":"1.0","description":"Scala \u3067\u306f\u6f14\u7b97\u5b50\u3082\u30e1\u30bd\u30c3\u30c9\u3068\u3057\u3066\u5b9f\u88c5\u3055\u308c\u3066\u3044\u3066\u3001obj1 op obj2 \u306a\u3093\u3066\u30b3\u30fc\u30c9\u306f\u3001obj1.op(obj2) \u3068\u540c\u3058\u610f\u5473\u3092\u6301\u3064\u3002 \u3068\u306a\u308b\u3068\u3001\u6c17\u306b\u306a\u3063\u3066\u304f\u308b\u306e\u306f obj1 \u304c null \u306e\u5834\u5408\u3069\u3046\u306a\u308b\u306e\u3088\uff1f\u3063\u3066\u3053\u3068\u3067\u30fb\u30fb\u30fb\u8272\u3005\u3068\u8a66\u3057\u3066\u307f\u305f\u3002 scala> null == null res0: Boolean = true scala> null.==(null) res1: Boolean = true null \u3067\u3082\u30e1\u30bd\u30c3\u30c9\u306f\u547c\u3079\u308b\u3089\u3057\u3044\u3002 \u3061\u3087\u3063\u3068\u3072\u306d\u3063\u3066\u3001 scala> val nullStr: String = null res2: String = null scala>\u2026","title":"null \u3067\u30e1\u30bd\u30c3\u30c9\u3092\u8d77\u52d5\u3059\u308b","categories":["Scala"],"author_name":"bleis-tift","url":"https://bleis-tift.hatenablog.com/entry/20091111/1257943398","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fbleis-tift.hatenablog.com%2Fentry%2F20091111%2F1257943398\" title=\"null \u3067\u30e1\u30bd\u30c3\u30c9\u3092\u8d77\u52d5\u3059\u308b - \u3050\u308b\u3050\u308b\uff5e\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_name":"Hatena Blog","height":"190","blog_title":"\u3050\u308b\u3050\u308b\uff5e","blog_url":"https://bleis-tift.hatenablog.com/"}