{"title":"Null\u30bb\u30fc\u30d5\u3092\u4f53\u611f\u3057\u3066\u307f\u308b\u3002","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fcero-t.hatenadiary.jp%2Fentry%2F20120112%2F1326385900\" title=\"Null\u30bb\u30fc\u30d5\u3092\u4f53\u611f\u3057\u3066\u307f\u308b\u3002 - \u8c37\u672c \u5fc3 in \u305b\u308d\u90e8\u5c4b\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":["kotlin"],"blog_title":"\u8c37\u672c \u5fc3 in \u305b\u308d\u90e8\u5c4b","provider_url":"https://hatena.blog","description":"Kotlin\u306e\u4e00\u756a\u7c21\u5358\u306e\u30b5\u30f3\u30d7\u30eb\u306f\u3001\u3053\u308c\u3002 \u4e16\u754c\u3067\u6700\u3082\u30ab\u30d0\u30fc\u3055\u308c\u305f\u8a00\u8a9e\u6570\u304c\u591a\u3044\u3068\u8a00\u308f\u308c\u308b\u3001K&R\u306e\u30cf\u30ed\u30fc\u30ef\u30fc\u30eb\u30c9\u3067\u3059\u3002 fun main(args : Array<String>) { System.out?.println(\"Hello, world!\") } \u898b\u3069\u3053\u308d\u306f\u3001out\u306e\u5f8c\u308d\u306b\u3064\u3044\u3066\u308b\u300c?\u300d\u3067\u3059\u306d\u3002 Kotlin\u306f\u8a00\u8a9e\u3068\u3057\u3066NullPointerException\u3092\u8d77\u3053\u3055\u306a\u3044\u3053\u3068\u3001 \u3064\u307e\u308aNull\u30bb\u30fc\u30d5\u306a\u6027\u8cea\u3092\u6301\u3063\u3066\u3044\u308b\u306e\u3067\u3059\u3002 Null\u306b\u306a\u308a\u305d\u3046\u306a\u6240\u306b\u306f\u300c?\u300d\u3092\u8a18\u8ff0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u3001 \u8981\u3059\u308b\u306b\u3001\u300c?\u300d\u306f\u300cNull\u304b\u3082?\u300d\u3050\u3089\u3044\u306b\u7406\u89e3\u3059\u308b\u3068\u826f\u3055\u305d\u3046\u3067\u3059\u3002 \u8a73\u3057\u3044\u89e3\u8aac\u306f\u3001\u3053\u306e\u30da\u30fc\u30b8\u306b\u3042\u2026","height":"190","author_url":"https://blog.hatena.ne.jp/cero-t/","published":"2012-01-12 01:31:40","type":"rich","author_name":"cero-t","url":"https://cero-t.hatenadiary.jp/entry/20120112/1326385900","blog_url":"https://cero-t.hatenadiary.jp/","width":"100%","version":"1.0","image_url":null}