{"description":"The Swift Programming Language: Properties\u3088\u308a\u3053\u308c\u306f\u7c21\u5358\u3067\u3073\u3063\u304f\u308a\u3060\u3002C#\u306ePropertyChanged\u3088\u308a\u3082\u30a4\u30b1\u3066\u308b\u4ed5\u7d44\u307f\u3060\u3068\u601d\u3046\u3002 class StepCounter { var totalSteps: Int = 0 { willSet(newTotalSteps) { println(\"About to set totalSteps to \\(newTotalSteps)\") } didSet { if totalSteps > oldValue { println(\"Added \\(totalSteps - oldValue) steps\"\u2026","provider_name":"Hatena Blog","type":"rich","width":"100%","author_name":"gothedistance","url":"https://aroundthedistance.hatenadiary.jp/entry/2014/11/12/180718","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Faroundthedistance.hatenadiary.jp%2Fentry%2F2014%2F11%2F12%2F180718\" title=\"swift\u3060\u3068\u7c21\u5358\u306b\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u76e3\u8996\u304c\u51fa\u6765\u308b\u4ef6 - Life is Really Short, Have Your Life!!\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","image_url":null,"blog_url":"https://aroundthedistance.hatenadiary.jp/","categories":["Swift"],"version":"1.0","author_url":"https://blog.hatena.ne.jp/gothedistance/","published":"2014-11-12 18:07:18","blog_title":"Life is Really Short, Have Your Life!!","title":"swift\u3060\u3068\u7c21\u5358\u306b\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u76e3\u8996\u304c\u51fa\u6765\u308b\u4ef6","provider_url":"https://hatena.blog","height":"190"}