{"type":"rich","blog_title":"JS.next","description":"\u5b9f\u88c5\u3055\u308c\u305f\u30e1\u30bd\u30c3\u30c9 String.prototype.repeat \u6587\u5b57\u5217\u3092\u6307\u5b9a\u3057\u305f\u56de\u6570\u3060\u3051\u7e70\u308a\u8fd4\u3057\u305f\u3001\u65b0\u3057\u3044\u6587\u5b57\u5217\u3092\u8fd4\u3059 String.prototype.startsWith \u6587\u5b57\u5217\u304c\u6307\u5b9a\u3055\u308c\u305f\u6587\u5b57\u5217\u3067\u958b\u59cb\u3055\u308c\u3066\u3044\u308b\u304b\u306e\u771f\u507d\u5024\u3092\u8fd4\u3059 String.prototype.endsWith \u6587\u5b57\u5217\u306e\u7d42\u7aef\u306b\u6307\u5b9a\u3055\u308c\u305f\u6587\u5b57\u5217\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u306e\u771f\u507d\u5024\u3092\u8fd4\u3059 String.prototype.includes \u6587\u5b57\u5217\u4e2d\u306b\u6307\u5b9a\u3055\u308c\u305f\u6587\u5b57\u5217\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u306e\u771f\u507d\u5024\u3092\u8fd4\u3059 \u3010\u6ce8\u610f\u3011\u300cincludes\u300d\u306f\u5f53\u521d\u300ccontains\u300d\u3068\u3044\u3046\u540d\u524d\u3067\u3057\u305f\u304c\u6539\u540d\u3055\u308c\u307e\u3057\u305f\u3002","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fjs-next.hatenablog.com%2Fentry%2F2013%2F07%2F31%2F054131\" title=\"\u6587\u5b57\u5217\u64cd\u4f5c\u306e\u30e1\u30bd\u30c3\u30c9\u304c\uff14\u3064\u5b9f\u88c5\u3055\u308c\u305f - JS.next\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_url":"https://js-next.hatenablog.com/","author_url":"https://blog.hatena.ne.jp/boaoa/","published":"2013-07-31 05:41:31","height":"190","version":"1.0","image_url":null,"width":"100%","provider_url":"https://hatena.blog","categories":["\u2605\u2605\u2606","ES2015","\u65b0\u4ed5\u69d8\u5b9f\u88c5","V8"],"title":"\u6587\u5b57\u5217\u64cd\u4f5c\u306e\u30e1\u30bd\u30c3\u30c9\u304c\uff14\u3064\u5b9f\u88c5\u3055\u308c\u305f","provider_name":"Hatena Blog","url":"https://js-next.hatenablog.com/entry/2013/07/31/054131","author_name":"boaoa"}