{"width":"100%","image_url":null,"provider_name":"Hatena Blog","height":"190","author_name":"wata_d","title":"for in \u30eb\u30fc\u30d7\u3092\u8aa4\u89e3\u3057\u3066\u3044\u305f","description":"ECMAScript \u306e for in \u30eb\u30fc\u30d7\u306f\u3001\u4ed6\u306e\u8a00\u8a9e\u307f\u305f\u3044\u306b\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u3051\u308b\u3082\u306e\u306a\u3093\u3060\u3068\u601d\u3063\u3066\u3044\u307e\u3057\u305f\u3002 for(var obj in objects) { obj.doSomething(); }\u3057\u304b\u3057\u3044\u3056\u5b9f\u884c\u3057\u3066\u307f\u308b\u3068\u30a8\u30e9\u30fc(TypeError)\u304c\u51fa\u3066\u3057\u307e\u3044\u307e\u3059\u3002\u81ea\u5206\u306e\u8133\u5185\u3067\u306f\u3001obj\u5909\u6570\u306b\u306fobjects\u306e\u5404\u8981\u7d20\u304c\u5165\u3063\u3066\u304f\u308c\u308b\u3093\u3060\u3068\u601d\u3063\u3066\u3044\u305f\u306e\u3067\u3059\u304c\u3001\u3061\u3083\u3093\u3068\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u3092\u898b\u3066\u307f\u308b\u3068\u3069\u3046\u3084\u3089\u3053\u3053\u306b\u306f\u6dfb\u3048\u5b57\u304c\u5165\u3063\u3066\u304f\u308b\u3088\u3046\u3067\u3059\u3002\u3064\u307e\u308a\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u304f\u306e\u304c\u6b63\u89e3\u3002 for(var i in objects) { objects[i].doSomething(); }\u52dd\u624b\u306a\u601d\u3044\u8fbc\u307f\u3067\u306f\u2026","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.little-cuckoo.jp%2Fentry%2F20060821%2F1156135585\" title=\"for in \u30eb\u30fc\u30d7\u3092\u8aa4\u89e3\u3057\u3066\u3044\u305f - \u9591\u53e4\u9ce5\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":["Javascript"],"blog_title":"\u9591\u53e4\u9ce5","published":"2006-08-21 13:46:25","type":"rich","provider_url":"https://hatena.blog","version":"1.0","author_url":"https://blog.hatena.ne.jp/wata_d/","url":"https://www.little-cuckoo.jp/entry/20060821/1156135585","blog_url":"https://www.little-cuckoo.jp/"}