{"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftech.excite.co.jp%2Fentry%2F2024%2F06%2F17%2F154503\" title=\"\u3010Dart\u3011Null\u306e\u6271\u3044\u65b9\u306b\u3064\u3044\u3066 - \u30a8\u30ad\u30b5\u30a4\u30c8 TechBlog.\" 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","provider_url":"https://hatena.blog","blog_title":"\u30a8\u30ad\u30b5\u30a4\u30c8 TechBlog.","width":"100%","categories":[],"blog_url":"https://tech.excite.co.jp/","description":"\u3053\u3093\u306b\u3061\u306f\u3002\u30a8\u30ad\u30b5\u30a4\u30c8\u682a\u5f0f\u4f1a\u793e\u3067\u30a8\u30f3\u30b8\u30cb\u30a2\u3092\u3057\u3066\u3044\u308b\u65b0\u5352\u306e\u5ca1\u5cf6\u3067\u3059\u3002 \u666e\u6bb5\u696d\u52d9\u3067\u306fFlutter\u3092\u7528\u3044\u305f\u30a2\u30d7\u30ea\u958b\u767a\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002 \u4eca\u56de\u306f\u3001\u696d\u52d9\u4e2d\u306bnull\u306e\u6271\u3044\u306b\u3064\u3044\u3066\u60a9\u3080\u5834\u9762\u304c\u3042\u3063\u305f\u306e\u3067\u3001Dart\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u8aad\u3093\u3067\u826f\u3044\u3068\u3055\u308c\u308bnull\u306e\u6271\u3044\u65b9\u3092\u307f\u3066\u3044\u3053\u3046\u3068\u601d\u3044\u307e\u3059\u3002 null\u3068\u306f Effective Dart\u3067\u63a8\u5968\u3055\u308c\u3066\u3044\u308bnull\u306e\u6271\u3044\u65b9 \u74b0\u5883 \u660e\u793a\u7684\u306bnull\u3092\u521d\u671f\u5316\u3057\u306a\u3044 Null\u8a31\u5bb9\u578b\u306e\u7b49\u4fa1\u6f14\u7b97\u3067\u306f true \u307e\u305f\u306f false \u3092\u4f7f\u7528\u3057\u306a\u3044 \u5909\u6570\u304c\u521d\u671f\u5316\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u5834\u5408\u306f\u3001late\u5909\u6570\u3092\u907f\u3051\u308b Null\u8a31\u5bb9\u578b\u3092\u4f7f\u7528\u3059\u308b\u305f\u3081\u306e\u578b\u6607\u683c\u307e\u305f\u306fnull\u30c1\u30a7\u30c3\u2026","image_url":null,"author_name":"excite-okazi","url":"https://tech.excite.co.jp/entry/2024/06/17/154503","author_url":"https://blog.hatena.ne.jp/excite-okazi/","version":"1.0","height":"190","title":"\u3010Dart\u3011Null\u306e\u6271\u3044\u65b9\u306b\u3064\u3044\u3066","type":"rich","published":"2024-06-17 15:45:03"}