{"author_url":"https://blog.hatena.ne.jp/yupug/","version":"1.0","categories":["JavaScript"],"author_name":"yupug","published":"2007-02-23 03:11:15","provider_name":"Hatena Blog","blog_url":"https://yupug.hatenadiary.org/","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyupug.hatenadiary.org%2Fentry%2F20070223%2F1172254275\" title=\"\u4e0e\u3048\u3089\u308c\u305f\u5024\u304c\u6570\u5024\u304b\u3069\u3046\u304b\u306e\u5224\u5b9a (NaN) - web newbie\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"\u4e0e\u3048\u3089\u308c\u305f\u5024\u304c\u6570\u5024\u304b\u3069\u3046\u304b\u306e\u5224\u5b9a (NaN)","image_url":null,"description":"\u3053\u3046\u3084\u308b\u306e\u304c\u6b63\u3002\u304b\u306a\uff1f if ( isNaN( parseInt( number ) ) isNaN\u306f\u5f15\u6570\u304cNaN\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u95a2\u6570\u306a\u306e\u3067\u3059\u304c\u3001 NaN(Not a Number)\u3063\u3066\u4f55\uff1f\uff1f\u3068\u3044\u3063\u305f\u3089\u3001Number\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306eNaN\u30d7\u30ed\u30d1\u30c6\u30a3\u3089\u3057\u3044\u3067\u3059\u3002 http://developer.mozilla.org/en/docs/Core_JavaScript_1.5_Reference:Global_Properties:NaN\u305d\u3057\u3066\u3001\u3053\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u5024\u306f\u3001\u4ee3\u5165\u3067\u304d\u306a\u3044\u3057\u3001\u6bd4\u8f03\u3067\u304d\u306a\u3044\u306e\u3060\u305d\u3046\u3067\u3059\u3002 NaN is always unequal to any other number,\u2026","width":"100%","height":"190","url":"https://yupug.hatenadiary.org/entry/20070223/1172254275","type":"rich","blog_title":"web newbie"}