{"author_name":"gurrium","type":"rich","provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/gurrium/","url":"https://giarrium.hatenablog.com/entry/2021/07/10/171942","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fgiarrium.hatenablog.com%2Fentry%2F2021%2F07%2F10%2F171942\" title=\"33\u65e5\u76ee in-out\u30d1\u30e9\u30e1\u30fc\u30bf\u306eproperty observer - \u305c\u306e\u305c\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"33\u65e5\u76ee in-out\u30d1\u30e9\u30e1\u30fc\u30bf\u306eproperty observer","blog_url":"https://giarrium.hatenablog.com/","image_url":null,"published":"2021-07-10 17:19:42","categories":["Swift"],"width":"100%","description":"\u65e5\u8a18 \u4eca\u65e5\u306f\u3042\u307e\u308a\u306b\u6687\u3060\u3063\u305f\u306e\u3067\u660e\u308b\u3044\u3046\u3061\u304b\u3089\u66f8\u3044\u3066\u3044\u308b\uff0e \u4eca\u65e5\u66f8\u3044\u305f\u30b3\u30fc\u30c9 struct Cup { var content: String { willSet { print(\"willSet:\", newValue) } didSet { print(\"didSet:\", content) } } } func replace(_ newContet: String, from oldContent: inout String) { print(\"before pouring\") oldContent = newContet print(\"after pouring\") } func d\u2026","blog_title":"\u305c\u306e\u305c","version":"1.0","height":"190"}