{"provider_name":"Hatena Blog","height":"190","type":"rich","description":"JavaScript \u3067\u306f\u5358\u4f53\u306e + \u6f14\u7b97\u3067\u6570\u5024\u5316\u304c\u884c\u308f\u308c\u308b \u3053\u308c\u3092\u5229\u7528\u3057\u3066\u6570\u5024\u3063\u307d\u3044\u304b\u5224\u5b9a\u3059\u308b\u95a2\u6570\u3092\u4f5c\u3063\u3066\u307f\u305f\u3002 \u3053\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6570\u5024\u3063\u307d\u3044\uff1f function isNumber(a) { return +a == a } \u3053\u3093\u306a\u611f\u3058\u3067\u4f7f\u3046 isNumber(true); // true (true \u306f 1 \u3068\u3057\u3066\u6271\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u304b\u3089) isNumber(false); // true (false \u306f 2 \u3068\u3057\u3066\u6271\u3046\u3053\u3068\u304c\u3067\u304d\u308b\u304b\u3089) isNumber(\"1e1\"); // true (\u6570\u5024\u306b\u5909\u63db\u53ef\u80fd\u306a\u6587\u5b57\u5217) isNumber(\"hoge\"); // false (\u6570\u5024\u306b\u5909\u63db\u4e0d\u53ef\u80fd\u306a\u6587\u5b57\u2026","url":"https://amachang.hatenablog.com/entry/20061111/1163274295","image_url":null,"provider_url":"https://hatena.blog","author_url":"https://blog.hatena.ne.jp/amachang/","title":" \u6587\u5b57\u5217\u3067\u3082\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3082\u306a\u3093\u3067\u3082\u4e00\u767a\u3067\u6570\u5024\u306b\u5909\u63db\uff01","published":"2006-11-11 04:44:55","blog_url":"https://amachang.hatenablog.com/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Famachang.hatenablog.com%2Fentry%2F20061111%2F1163274295\" title=\" \u6587\u5b57\u5217\u3067\u3082\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3082\u306a\u3093\u3067\u3082\u4e00\u767a\u3067\u6570\u5024\u306b\u5909\u63db\uff01 - IT\u6226\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","version":"1.0","blog_title":"IT\u6226\u8a18","categories":["JavaScript"],"width":"100%","author_name":"amachang"}