{"url":"https://sixpetals.hatenadiary.org/entry/20051027/p2","title":"Nullable\u3068Nothing","height":"190","published":"2005-10-27 00:00:01","version":"1.0","author_name":"sixpetals","description":".NET 2.0\u306b\u306a\u3063\u3066\u3001Nullable\u304c\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u3053\u308c\u306f\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u306bNull\u3092\u5165\u308c\u3089\u308c\u308b\u30b8\u30a7\u30cd\u30ea\u30c3\u30af\u3067\u3001VB.NET\u3067\u3044\u3048\u3070\u3001Nothing\u3092\u5165\u308c\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308b\u3088\u3046\u3067\u3059\u3002\u4f7f\u3044\u65b9\u306f\u7c21\u5358\u3001 Dim num as Nullable(of Long) = 2 \u306e\u3088\u3046\u306b\u3059\u308c\u3070\u3044\u3044\u307f\u305f\u3044\u3067\u3059\u306d\u3002\u3053\u308c\u3067num = Nothing\u304c\u4f7f\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002Boxing\u306e\u9b54\u6cd5\u306b\u3088\u308a\u3053\u306enum\u306flong\u578b\uff08\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\uff09\u306b\u305d\u306e\u307e\u307e\u4ee3\u5165\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002 Dim numLong as Long = num \u3057\u304b\u3057\u3001\u56f0\u3063\u305f\u3053\u3068\u306bIs\u6f14\u7b97\u5b50\u304c\u4f7f\u3048\u306a\u3044\u305f\u3081\u3001\u6761\u4ef6\u5206\u5c90\u306e\u3068\u304d\u306a\u3069\u306b\u666e\u901a\u306e\u30af\u30e9\u2026","categories":[".NET","VB.NET",".NET 2.0"],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fsixpetals.hatenadiary.org%2Fentry%2F20051027%2Fp2\" title=\"Nullable\u3068Nothing - \u72c2\u8a00\u65e5\u8a8c\" 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","width":"100%","author_url":"https://blog.hatena.ne.jp/sixpetals/","provider_url":"https://hatena.blog","blog_url":"https://sixpetals.hatenadiary.org/","blog_title":"\u72c2\u8a00\u65e5\u8a8c","type":"rich","image_url":null}