{"height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhiratara.hatenadiary.jp%2Fentry%2F2021%2F09%2F25%2F153912\" title=\"TypeScript\u306e\u5206\u914d\u6761\u4ef6\u578b - Pixel Pedals of Tomakomai\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_title":"Pixel Pedals of Tomakomai","provider_name":"Hatena Blog","url":"https://hiratara.hatenadiary.jp/entry/2021/09/25/153912","width":"100%","published":"2021-09-25 15:39:12","version":"1.0","provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/hiratara/","author_name":"hiratara","type":"rich","title":"TypeScript\u306e\u5206\u914d\u6761\u4ef6\u578b","image_url":null,"categories":["\u6280\u8853"],"description":"\u6700\u8fd1\u30aa\u30e9\u30a4\u30ea\u30fc\u306eTypeScript\u672c\u3092\u8aad\u3093\u3067\u3044\u308b\u304c\u3001\u578b\u30b7\u30b9\u30c6\u30e0\u304c\u982d\u304c\u304a\u304b\u3057\u304f\u3066\uff08\u8912\u3081\u3066\u308b\uff09\u3068\u3066\u3082\u9762\u767d\u3044\u3002 www.oreilly.co.jp TypeScript\u3067\u306f\u3001\u3053\u3093\u306a\u611f\u3058\u306e\u578b\u30ec\u30d9\u30eb\u95a2\u6570\u304c\u5b9a\u7fa9\u3067\u304d\u308b\u3002\u4ee5\u4e0b\u306e Extract2 \u306f T \u306e\u3046\u3061\u3001 U \u3067\u3042\u308b\u3082\u306e\u3092\u5c55\u958b\u3059\u308b\u3068\u3044\u3046\u3082\u306e\u3067\u3042\u308b\u3002\u540c\u69d8\u306e\u50cd\u304d\u3092\u3059\u308b Extract \u304c\u7d44\u307f\u8fbc\u307f\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u3053\u3053\u3067\u306f 2 \u3068\u540d\u524d\u3092\u4ed8\u3051\u305f\u3002 type Extract2<T, U> = T extends U ? T : never; Extract2 \u3092\u4f7f\u3046\u3068\u3001\u4f8b\u3048\u3070\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\u306e\u30ad\u30fc\u306e\u578b\u3067\u3001\u6587\u5b57\u5217\u3067\u3042\u308b\u3082\u306e\u3060\u3051\u3092\u578b\u3068\u3057\u3066\u53d6\u308a\u51fa\u305b\u308b\u3002 type\u2026","blog_url":"https://hiratara.hatenadiary.jp/"}