{"version":"1.0","blog_url":"https://bouzuya.hatenablog.com/","type":"rich","published":"2018-02-08 23:33:31","author_name":"bouzuya","image_url":null,"categories":[],"blog_title":"bouzuya.hatenablog.com","url":"https://bouzuya.hatenablog.com/entry/2018/02/08/233331","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fbouzuya.hatenablog.com%2Fentry%2F2018%2F02%2F08%2F233331\" title=\"\u65e5\u8a18 -- \u6563\u9aea\u3068\u304b void \u3068\u304b - bouzuya.hatenablog.com\" 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","title":"\u65e5\u8a18 -- \u6563\u9aea\u3068\u304b void \u3068\u304b","width":"100%","author_url":"https://blog.hatena.ne.jp/bouzuya/","description":"\u5bdd\u574a\u3002\u663c\u306b\u5bdd\u3066\u3044\u306a\u3044\u304b\u591c\u306b\u30c6\u30ec\u30d3\u306a\u3069\u3092\u89b3\u306a\u304c\u3089\u5bdd\u308b\u3068\u5bdd\u574a\u306b\u3064\u306a\u304c\u308b\u3088\u3046\u306a\u6c17\u304c\u3059\u308b\u3002 \u663c\u306f\u6563\u9aea\u3002\u6628\u65e5 (2018-02-07) \u66f8\u3044\u305f\u3068\u304a\u308a\u3002\u6628\u65e5\u304c 3 \u306e\u500d\u6570\u9031\u306e\u6c34\u66dc\u65e5\u3060\u3063\u305f\u3051\u3069\u3001\u5207\u3089\u306a\u304b\u3063\u305f\u306e\u3067\u3001\u4eca\u65e5\u306f\u5207\u3063\u305f\u3002 \u591c\u306f TypeScript \u306e void \u3068 undefined \u306e\u52d5\u304d\u306b\u3082\u3084\u3082\u3084\u3002 void \u306f\u9762\u5012\u3067\u3082 undefined \u306b typeof x === 'undefined' ? void 0 : x \u306a\u3069\u306e\u5f62\u3067\u5909\u63db\u3057\u3066\u51e6\u7406\u3059\u308b\u3068\u826f\u3055\u305d\u3046\u3002 w \u306a\u3093\u3068\u304b\u3055\u3093\u306b\u6559\u3048\u3066\u3082\u3089\u3063\u305f\u3002","height":"190","provider_url":"https://hatena.blog"}