{"author_name":"yosinoo","type":"rich","title":"Array\u306e\u64cd\u4f5c\u3092\u9593\u9055\u3048\u308b\u3068length\u3068\u8981\u7d20\u6570\u304c\u5408\u308f\u306a\u304f\u306a\u3063\u305f\u308a\u3059\u308b","blog_url":"https://minor.hatenablog.com/","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fminor.hatenablog.com%2Fentry%2F2014%2F06%2F09%2F235323\" title=\"Array\u306e\u64cd\u4f5c\u3092\u9593\u9055\u3048\u308b\u3068length\u3068\u8981\u7d20\u6570\u304c\u5408\u308f\u306a\u304f\u306a\u3063\u305f\u308a\u3059\u308b - \u30de\u30a4\u30ca\u30fc\u30fb\u30de\u30a4\u30ca\u30fc\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","published":"2014-06-09 23:53:23","url":"https://minor.hatenablog.com/entry/2014/06/09/235323","author_url":"https://blog.hatena.ne.jp/yosinoo/","image_url":null,"provider_url":"https://hatena.blog","height":"190","description":"\u65e2\u5b58\u30b3\u30fc\u30c9\u306b\u914d\u5217\u306e\u8981\u7d20\u3092delete\u3057\u3066\u3044\u308b\u3068\u3053\u308d\u304c\u3042\u3063\u305f\u306e\u3067\u3001\u771f\u4f3c\u3057\u3066\u8981\u7d20\u306e\u524a\u9664\u306fdelete\u3092\u4f7f\u3063\u3066\u3044\u305f\u306e\u3067\u3059\u304c\u3001\u30c7\u30d0\u30c3\u30b0\u3057\u3066\u3044\u305f\u3089\u306a\u3093\u304b\u8981\u7d20\u6570\u3068length\u304c\u5408\u308f\u306a\u3044\u3002\u8abf\u3079\u3066\u307f\u305f\u3089\u3001delete\u306fArray\u306elength\u3092\u66f4\u65b0\u3057\u306a\u3044\u3088\u3046\u3067\u3057\u305f\u3002\u306a\u3093\u3066\u3053\u3063\u305f\uff01 var testArray = [\"A\", \"B\", \"C\"]; console.log(testArray); // A,B,C console.log(testArray.length); // 3 delete testArray[2]; console.log(testArray); // A,B console.log(t\u2026","width":"100%","categories":["JavaScript"],"version":"1.0","blog_title":"\u30de\u30a4\u30ca\u30fc\u30fb\u30de\u30a4\u30ca\u30fc"}