{"width":"100%","type":"rich","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fprogret.hatenadiary.com%2Fentry%2F2019%2F08%2F22%2F235116\" title=\"Go\u306e\u578b\u4ed8\u304dnil\u3067\u6b7b\u3093\u3060\u8a71 - \u4eac\u90fd\u884c\u304d\u305f\u3044\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","height":"190","url":"https://progret.hatenadiary.com/entry/2019/08/22/235116","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/r/reteria/20190822/20190822234013.png","categories":[],"title":"Go\u306e\u578b\u4ed8\u304dnil\u3067\u6b7b\u3093\u3060\u8a71","published":"2019-08-22 23:51:16","provider_url":"https://hatena.blog","blog_title":"\u4eac\u90fd\u884c\u304d\u305f\u3044","version":"1.0","author_name":"reteria","description":"\u3053\u308c\u306f\u3069\u3046\u3044\u3046\u7d50\u679c\u306b\u306a\u308b\u304b\u3001\u5206\u304b\u308a\u307e\u3059\u304b\uff1f package main import ( \"fmt\" \"bytes\" ) func Buffer() *bytes.Buffer { return nil } func main() { b := Buffer() fmt.Printf(\"%T %v\", b, b) } \u3053\u3046\u306a\u308a\u307e\u3059\u3002 \u578b\u7121\u3057nil\u306b\u306a\u3063\u3066\u6b32\u3057\u3044\u6c17\u6301\u3061\u3060\u3063\u305f\u3002 \u7d50\u5c40\u3001\u623b\u308a\u5024\u306e\u578b\u3092io.Reader\u306b\u3057\u307e\u3057\u305f\u3002","blog_url":"https://progret.hatenadiary.com/","provider_name":"Hatena Blog","author_url":"https://blog.hatena.ne.jp/reteria/"}