{"description":"\u203b \u3053\u3061\u3089\u306f\u30df\u30c4\u30e2\u30a2Advent Calendar 2023\u306e13\u65e5\u76ee\u306e\u8a18\u4e8b\u3067\u3059\u3002 \u578b\u77e5\u8b58\u304c\u660e\u65e5\u306e\u3042\u306a\u305f\u3092\u5909\u3048\u308b\u3001\u578b\u30c8\u30ea\u30d3\u30a2\u306e\u6cc9\u3078\u3088\u3046\u3053\u305d \u30df\u30c4\u30e2\u30a2\u306e\u5742\u672c\u3067\u3059\u3002 \u672c\u65e5\u3082\u3001\u751f\u304d\u3066\u3044\u304f\u4e0a\u3067\u5f79\u306b\u306f\u7acb\u3061\u305d\u3046\u3060\u3057\u3001\u3064\u3044\u4eba\u306b\u6559\u3048\u305f\u304f\u306a\u3063\u3066\u3057\u307e\u3046\u3088\u3046\u306a\u578b\u30c8\u30ea\u30d3\u30a2\u3092\u7d39\u4ecb\u3057\u3066\u3044\u304d\u307e\u3059\u3002 20\u3078\u3047: !\u3092\u591a\u7528\u3059\u308b\u3068\u5206\u304b\u308a\u3084\u3059\u304f\u306a\u308b TypeScript\u3067\u306fOptional\u578b\u306b\u5bfe\u3057\u3066\u5b58\u5728\u30c1\u30a7\u30c3\u30af\u3092\u305b\u305a\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068 'num' is possibly 'undefined'. \u3068\u3044\u3063\u305f\u3088\u3046\u306a\u30a8\u30e9\u30fc\u304c\u51fa\u307e\u3059\u3002 \u4e01\u5be7\u306b\u66f8\u304f\u5834\u5408\u306f const numStr = num?.toString() ?? '0' \u306e\u3088\u3046\u306b\u66f8\u304b\u2026","author_name":"meetsmore","version":"1.0","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/m/meetsmore/20221206/20221206215730.png","blog_title":"\u30df\u30c4\u30e2\u30a2 Tech blog","blog_url":"https://engineering.meetsmore.com/","author_url":"https://blog.hatena.ne.jp/meetsmore/","categories":[],"provider_url":"https://hatena.blog","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fengineering.meetsmore.com%2Fentry%2F2023%2F12%2F13%2F173512\" title=\"\u578b\u30c8\u30ea\u30d3\u30a2\u306e\u6cc9\u301c\u7d20\u6674\u3089\u3057\u304d\u578b\u77e5\u8b58\u301c - \u30df\u30c4\u30e2\u30a2 Tech blog\" 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","published":"2023-12-13 17:35:12","width":"100%","url":"https://engineering.meetsmore.com/entry/2023/12/13/173512","title":"\u578b\u30c8\u30ea\u30d3\u30a2\u306e\u6cc9\u301c\u7d20\u6674\u3089\u3057\u304d\u578b\u77e5\u8b58\u301c","type":"rich"}