{"categories":["Javascript"],"published":"2013-01-03 22:50:43","url":"https://takahashikzn.root42.jp/entry/20130103/1357221043","provider_url":"https://hatena.blog","height":"190","type":"rich","author_name":"takahashikzn","provider_name":"Hatena Blog","version":"1.0","blog_url":"https://takahashikzn.root42.jp/","width":"100%","author_url":"https://blog.hatena.ne.jp/takahashikzn/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftakahashikzn.root42.jp%2Fentry%2F20130103%2F1357221043\" title=\" new\u6f14\u7b97\u5b50\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\uff1f - R42\u65e5\u8a18\" 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,"title":" new\u6f14\u7b97\u5b50\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\uff1f","description":"\u3044\u307e\u77e5\u3063\u305f\u306e\u3067\u3059\u304c\u3001Javascript\u3067\u306f\u3001new\u6f14\u7b97\u5b50\u306e\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u7684\u306a\u82b8\u5f53\u304c\u4f7f\u3048\u307e\u3059\u3002 \u4f46\u3057\u6761\u4ef6\u304c\u3042\u3063\u3066\u3001\u300e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3092\u95a2\u6570\u3068\u3057\u3066\u8a55\u4fa1\u3057\u305f\u7d50\u679c\u304c\u6570\u5024\u3001\u6587\u5b57\u5217\u3001\u771f\u507d\u5024\u3001null\u3001undefined\u4ee5\u5916\u306e\u307f\u300f\u3067\u3059\u3002 \u4ed5\u69d8\u7684\u306b\u306f\u3053\u308c\u3002 http://www.ecma-international.org/ecma-262/5.1/#sec-13.2.2 \u5177\u4f53\u7684\u306a\u691c\u8a3c\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u3002 function Foo() { return 1; // \"a\"\u3084true\u306a\u3069\u3067\u3082\u540c\u3058 } // 1\u3092\u8868\u793a\uff08\u5f53\u305f\u308a\u524d\uff09 alert(Foo()); // [object Object]\u3092\u8868\u793a alert(new\u2026","blog_title":"R42\u65e5\u8a18"}