{"type":"rich","author_url":"https://blog.hatena.ne.jp/teramako/","blog_url":"https://teramako.hatenadiary.org/","image_url":null,"blog_title":"hogehoge @teramako","version":"1.0","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fteramako.hatenadiary.org%2Fentry%2F20130217%2Fp1\" title=\"Array + Set \u3067\u691c\u7d22\u3092\u9ad8\u901f\u306b - hogehoge @teramako\" 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://teramako.hatenadiary.org/entry/20130217/p1","published":"2013-02-17 00:00:00","description":"Array#indexOf(item) !== -1\u3092\u3084\u3063\u3066\u5b58\u5728\u3092\u78ba\u8a8d\u3059\u308b\u306e\u304c\u3001\u3069\u3046\u306b\u3082\u901f\u3044\u6c17\u304c\u3057\u306a\u304f\u3066\u3084\u3063\u3066\u307f\u305f\u3002\u3068\u308a\u3042\u3048\u305a\u3001Array.indexOf vs Set.has \u00b7 jsPerf\u3067\u901f\u5ea6\u78ba\u8a8d\u3002Set#has\u304c\u5727\u5012\u7684\u306b\u901f\u3044\u3002\u304b\u3068\u8a00\u3063\u3066\u3001\u5358\u7d14\u306a Set \u3067\u306f\u4ee5\u4e0b\u306e\u70b9\u3067\u4f7f\u3044\u3065\u3089\u3044 \u5024\u306e\u9806\u756a\u64cd\u4f5c\u304c\u9762\u5012 \u5165\u3063\u3066\u3044\u308b\u5024\u306b\u76f4\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u3044 \u3068\u3044\u3046\u3053\u3068\u3067\u3001\u914d\u5217\u7684\u306a\u3093\u3060\u3051\u3069\u3001\u5185\u90e8\u306bSet\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6301\u3063\u305f\u3082\u306e\u3092\u4f5c\u3063\u3066\u307f\u305f https://gist.github.com/teramako/4970442 ECMAScript.next \u306a\u306e\u304c\u305f\u304f\u3055\u3093\u5165\u3063\u3066\u3044\u308b\u306e\u3067\u3001\u4eca\u306e\u3068\u3053\u308d\u3001Fir\u2026","categories":["JavaScript"],"width":"100%","provider_name":"Hatena Blog","provider_url":"https://hatena.blog","author_name":"teramako","height":"190","title":"Array + Set \u3067\u691c\u7d22\u3092\u9ad8\u901f\u306b"}