{"blog_title":"mtoyoshi\u958b\u767a\u30e1\u30e2","author_name":"mtoyoshi","url":"https://mtoyoshi.hateblo.jp/entry/20090206/1233876699","categories":["Javascript"],"width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fmtoyoshi.hateblo.jp%2Fentry%2F20090206%2F1233876699\" title=\"for-in\u6587\u3068if-in\u6587\u306e\u304a\u3055\u3089\u3044 - mtoyoshi\u958b\u767a\u30e1\u30e2\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","published":"2009-02-06 08:31:39","provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/mtoyoshi/","blog_url":"https://mtoyoshi.hateblo.jp/","version":"1.0","type":"rich","title":"for-in\u6587\u3068if-in\u6587\u306e\u304a\u3055\u3089\u3044","provider_name":"Hatena Blog","height":"190","image_url":null,"description":"\u3053\u308c\u3089\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u542b\u307e\u308c\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u8abf\u3079\u308b\u6642\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002for-in\u306f\u3088\u304f\u4f7f\u3046\u3093\u3060\u3051\u3069\u3001if-in\u306f\u4e45\u3005\u306b\u4f7f\u3046\u3053\u3068\u306b\u306a\u3063\u305f\u306e\u3067\u3001\u601d\u3044\u51fa\u3059\u306e\u306b\u6642\u9593\u304c\u304b\u304b\u3063\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u3002\u3068\u3044\u3046\u308f\u3051\u3067\u3044\u3064\u3082\u306e\u3088\u3046\u306b\u5fd8\u308c\u306a\u3044\u305f\u3081\u306b\u30e1\u30e2\u3002 var obj = {name : \"hatena\", showMessahge : function(){ alert(\"hello\"); }}; \u3053\u3093\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u3042\u3063\u305f\u3068\u304d\u306b\u3001\u3053\u306eobj\u304c\u3082\u3064\u30d7\u30ed\u30d1\u30c6\u30a3\u4e00\u89a7\u3092\u898b\u305f\u3044\u3068\u304d\u306f\u6b21\u306e\u3088\u3046\u306b\u3059\u308b\u3002 for(var property in obj) { console.log(property); // firebug\u306e\u30b3\u30f3\u30bd\u30fc\u2026"}