{"url":"https://hokaccha.hatenablog.com/entry/2016/03/21/162936","type":"rich","provider_url":"https://hatena.blog","provider_name":"Hatena Blog","description":"Array.prototype.keys\u306fIterator\u3092\u8fd4\u3059\u306e\u3067Array.from\u306b\u98df\u308f\u305b\u308b Array.from(Array(5).keys()); //=> [0, 1, 2, 3, 4] \u3082\u3057\u304f\u306f Array.from({ length: 5 }).map((v, k) => k); //=> [0, 1, 2, 3, 4] Array.from\u306e\u7b2c\u4e8c\u5f15\u6570\u306fmap\u7684\u306a\u5f79\u5272\u304c\u3042\u308b\u306e\u3067 Array.from({ length: 5 }, (v, k) => k); //=> [0, 1, 2, 3, 4] \u3053\u3093\u306a\u611f\u3058\u3002 [\u8ffd\u8a18] \u4fbf\u5229\u3002 ES6\u3067N\u500b\u306e\u914d\u5217 - hokaccha ham\u2026","blog_title":"hokaccha memo","author_url":"https://blog.hatena.ne.jp/hokaccha/","version":"1.0","blog_url":"https://hokaccha.hatenablog.com/","title":"ES6\u3067N\u500b\u306e\u914d\u5217","height":"190","image_url":null,"width":"100%","published":"2016-03-21 16:29:36","author_name":"hokaccha","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fhokaccha.hatenablog.com%2Fentry%2F2016%2F03%2F21%2F162936\" title=\"ES6\u3067N\u500b\u306e\u914d\u5217 - hokaccha memo\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":["JavaScript"]}