{"height":"190","provider_name":"Hatena Blog","description":"new Array(1)\u306f\u307e\u3063\u305f JS var hoge = new Array(1, 3, 4); \u2191\u666e\u6bb5\u306f\u3053\u306e\u3088\u3046\u306b\u5b9a\u7fa9\u3057\u3066\u3044\u308b\u3002 \u914d\u5217\u306b\u3057\u305f\u30443\u3064\u306e\u6570\u5b57\u3092\u5f15\u6570\u306b\u3057\u3066\u3044\u308b\u3002 var hoge = new Array(1); console.log(hoge[0]); \u2192\u3057\u304b\u3057\u3053\u308c\u306fundefined\u306b\u306a\u308b\u3002Array\u306e\u5f15\u6570\u306fArray\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3067\u306e\u5927\u304d\u3055\u300c1\u300d\u3092\u5b9a\u7fa9\u3057\u3066\u308b\u306e\u3060\u304b\u3089\u3002 1\u3064\u3060\u3051\u6570\u5b57\u3092\u5165\u308c\u3066\u3044\u308b\u3068\u52d8\u9055\u3044\u3057\u305f\u3002 \u5b9f\u969b\u306f\u3001\u300c1\u3064\u306e\u7a7a\u9593\u3092\u5b9a\u7fa9\u3057\u3001\u4f55\u3082\u5b9a\u7fa9\u3057\u3066\u3044\u306a\u3044\u300d\u304b\u3089\u5f53\u305f\u308a\u524d\u3067\u3042\u308b\u3002\u3053\u306e\u672c\u3067\u3082\u3059\u3059\u3081\u3066\u308b\u7406\u7531\u304c\u308f\u304b\u3063\u305f\u3002 var hoge = [1]; console.log(h\u2026","image_url":null,"categories":[],"blog_title":"\u4e07\u5e74\u7d20\u4eba\u304b\u3089Hacker\u3078\u306e\u9053","url":"https://shinriyo.hateblo.jp/entry/20120302","author_name":"shinriyo","author_url":"https://blog.hatena.ne.jp/shinriyo/","blog_url":"https://shinriyo.hateblo.jp/","version":"1.0","title":"","type":"rich","width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fshinriyo.hateblo.jp%2Fentry%2F20120302\" title=\" - \u4e07\u5e74\u7d20\u4eba\u304b\u3089Hacker\u3078\u306e\u9053\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_url":"https://hatena.blog","published":"2012-03-02 00:00:00"}