{"author_url":"https://blog.hatena.ne.jp/shawshank99/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Faoking.hatenablog.jp%2Fentry%2F20100312%2F1268351709\" title=\"isNaN\u95a2\u6570\u306e\u843d\u3068\u3057\u7a74 - \u306b\u3087\u304d\u306b\u3087\u304d\u30d6\u30ed\u30b0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","type":"rich","title":"isNaN\u95a2\u6570\u306e\u843d\u3068\u3057\u7a74","provider_url":"https://hatena.blog","blog_title":"\u306b\u3087\u304d\u306b\u3087\u304d\u30d6\u30ed\u30b0","description":"\u306f\uff1fnull\u3082\u7a7a\u6587\u5b57\u3082\u7a7a\u767d\u3082\u6570\u5024\u306a\u306e\uff1f isNaN(null) => false isNaN('') => false isNaN(' ') => false isNaN(undefined) => true \u3068\u3044\u3046\u308f\u3051\u3067\u5165\u529b\u3055\u308c\u305f\u5024\u304c\u6570\u5024\u304b\u3069\u3046\u304b\u3092\u8abf\u3079\u305f\u3044\u6642\u306a\u3069\u306f isNaN \u95a2\u6570\u3060\u3051\u3067\u306f\u3068\u3066\u3082\u4f7f\u3044\u7269\u306b\u306a\u3089\u306a\u3044\u306e\u3067\u3001 trim \u5f8c\u306b\u6709\u52b9\u306a\u9577\u3055\u304c\u3042\u308b\u304b\u8abf\u3079\u305f\u308a\u6b63\u898f\u8868\u73fe\u3067\u8abf\u3079\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002 \u53c2\u8003\uff1aJavaScript \u306e\u30e0\u30ab\u3064\u304f\u30b3\u30fc\u30c9\u3092\u96c6\u3081\u305f\u30b5\u30a4\u30c8 http://wtfjs.com/","provider_name":"Hatena Blog","width":"100%","version":"1.0","height":"190","published":"2010-03-12 08:55:09","author_name":"shawshank99","blog_url":"https://aoking.hatenablog.jp/","url":"https://aoking.hatenablog.jp/entry/20100312/1268351709","categories":["JavaScript"],"image_url":null}