{"published":"2021-08-07 17:00:56","width":"100%","description":"Rust\u306e\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306bnull\u306b\u95a2\u3059\u308b\u8208\u5473\u6df1\u3044\u8a18\u4e8b(\"Null References: The Billion Dollar Mistake\"(Null\u53c2\u7167: 10\u5104\u30c9\u30eb\u306e\u9593\u9055\u3044))\u304c\u5f15\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002 Enum\u3092\u5b9a\u7fa9\u3059\u308b - The Rust Programming Language null\u306f\u3001\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306b\u304a\u3051\u308b\u53cc\u65b9\u306e\u5408\u610f\u3068\u3057\u3066\u53d6\u308a\u5f97\u308b\u5024\u3068\u3059\u308b\u304b\u3001\u3057\u306a\u3044\u304b\u304c\u3044\u3064\u3082\u3042\u3044\u307e\u3044\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u70b9\u304c\u554f\u984c\u3002\u3042\u308b\u5909\u6570\u306e\u578b\u3092\u898b\u3066\u3082null\u3092\u53d6\u308a\u5f97\u308b\u304b\u306f\u660e\u793a\u3055\u308c\u3066\u3044\u306a\u3044\u306b\u3082\u95a2\u308f\u3089\u305a\u3001\u4eba\u306b\u3088\u3063\u3066\u300cnull\u3092\u8003\u616e\u3059\u3079\u304d\u300d\u300cnull\u306f\u53d6\u308a\u5f97\u306a\u3044\u300d\u306e\u4e8c\u3064\u306e\u72b6\u614b\u304c\u6df7\u5728\u3057\u3066\u3057\u307e\u3046\u3002\u305f\u3068\u3048\u3001\u540c\u3058\u4eba\u304c\u53cc\u65b9\u306e\u30b3\u30fc\u30c9\u2026","image_url":"https://docs.scala-lang.org/resources/images/scala3/explicit-nulls/explicit-nulls-type-hierarchy.png","url":"https://blog.magnolia.tech/entry/2021/08/07/170056","author_name":"magnoliak","version":"1.0","provider_name":"Hatena Blog","categories":[],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.magnolia.tech%2Fentry%2F2021%2F08%2F07%2F170056\" title=\"Scala3\u5b66\u7fd2\u30e1\u30e2: Scala\u3068null, Scala2\u3068Scala3\u3068 - Magnolia Tech\" 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/magnoliak/","blog_title":"Magnolia Tech","type":"rich","provider_url":"https://hatena.blog","title":"Scala3\u5b66\u7fd2\u30e1\u30e2: Scala\u3068null, Scala2\u3068Scala3\u3068","height":"190","blog_url":"https://blog.magnolia.tech/"}