{"published":"2016-09-01 13:27:45","provider_name":"Hatena Blog","blog_title":"30\u6b73\u304b\u3089\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0","width":"100%","author_url":"https://blog.hatena.ne.jp/numb_86/","author_name":"numb_86","title":"ES2015\u306e\u95a2\u6570\uff08\u30a2\u30ed\u30fc\u95a2\u6570\u3001this\u3001\u6b8b\u4f59\u5f15\u6570\u306a\u3069\uff09","description":"ES2015\u3067\u52a0\u308f\u3063\u305f\u3001\u95a2\u6570\u306b\u95a2\u3059\u308b\u4ed5\u69d8\u306b\u3064\u3044\u3066\u3002 \u5f15\u6570\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024 \u95a2\u6570\u306e\u5b9a\u7fa9\u6642\u306b\u3001\u5f15\u6570\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u6307\u5b9a\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u3002 \u95a2\u6570\u3092\u547c\u3073\u51fa\u3059\u969b\u306b\u5f15\u6570\u304c\u6e21\u3055\u308c\u305f\u5834\u5408\u306f\u305d\u308c\u3092\u3001\u6e21\u3055\u308c\u306a\u304b\u3063\u305f\u5834\u5408\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u3092\u3001\u4f7f\u7528\u3059\u308b\u3002 function addFunc(x = 1, y = 2){ console.log(x + y); }; addFunc(); // 3 addFunc(4, 5); // 9 addFunc(4); // 6 rest parameters rest parameters\u306f\u3001\u6b8b\u4f59\u5f15\u6570\u3068\u3082\u547c\u3070\u308c\u308b\u3002 \u3053\u308c\u306f\u3001\u4e0d\u7279\u5b9a\u591a\u6570\u306e\u5f15\u6570\u3092\u53d7\u3051\u53d6\u308b\u305f\u3081\u306e\u69cb\u6587\u3002\u53d7\u3051\u53d6\u3063\u305f\u5f15\u6570\u306f\u914d\u5217\u2026","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fnumb86-tech.hatenablog.com%2Fentry%2F2016%2F09%2F01%2F132745\" title=\"ES2015\u306e\u95a2\u6570\uff08\u30a2\u30ed\u30fc\u95a2\u6570\u3001this\u3001\u6b8b\u4f59\u5f15\u6570\u306a\u3069\uff09 - 30\u6b73\u304b\u3089\u306e\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","url":"https://numb86-tech.hatenablog.com/entry/2016/09/01/132745","height":"190","type":"rich","version":"1.0","image_url":null,"blog_url":"https://numb86-tech.hatenablog.com/","categories":["ES2015(ES6)","JavaScript\u306e\u8a00\u8a9e\u4ed5\u69d8(ES5)"]}