{"blog_url":"https://blog.kimizuka.org/","blog_title":"\u307f\u304b\u3065\u304d\u30d6\u30ed\u30b0\u30fb\u30ab\u30b9\u30bf\u30e0","provider_url":"https://hatena.blog","width":"100%","published":"2025-03-06 18:30:00","title":"\u8981\u7d20\u306e\u591a\u3044\u304c\u30e6\u30cb\u30fc\u30af\u306a\u914d\u5217\u306b\u7279\u5b9a\u306e\u8981\u7d20\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u8abf\u3079\u308b\u3068\u304d\u306bSet.prototype.has\u3092\u691c\u8a0e\u3059\u308b \ud83d\udd0d","type":"rich","categories":["JavaScript"],"author_url":"https://blog.hatena.ne.jp/kimizuka/","url":"https://blog.kimizuka.org/entry/2025/03/06/183000","height":"190","author_name":"kimizuka","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.kimizuka.org%2Fentry%2F2025%2F03%2F06%2F183000\" title=\"\u8981\u7d20\u306e\u591a\u3044\u304c\u30e6\u30cb\u30fc\u30af\u306a\u914d\u5217\u306b\u7279\u5b9a\u306e\u8981\u7d20\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u8abf\u3079\u308b\u3068\u304d\u306bSet.prototype.has\u3092\u691c\u8a0e\u3059\u308b \ud83d\udd0d - \u307f\u304b\u3065\u304d\u30d6\u30ed\u30b0\u30fb\u30ab\u30b9\u30bf\u30e0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","provider_name":"Hatena Blog","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/k/kimizuka/20201020/20201020140350.png","description":"const target = 'user-8823'; const hasTarget = users.includes(target); \u307f\u305f\u3044\u306a\u30b3\u30fc\u30c9\u3067\u3001\u8981\u7d20\u306e\u591a\u3044\u30e6\u30cb\u30fc\u30af\u306a\u914d\u5217\u304b\u3089\u3001\u7279\u5b9a\u306e\u8981\u7d20\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3059\u308b\u30b3\u30fc\u30c9\u3092\u9ad8\u901f\u3067\u52d5\u304b\u305d\u3046\u3068\u601d\u3063\u305f\u6642\u306b\u3001 const target = 'user-8823'; const set = newSet(users); const hasTarget = set.has(target); \u307f\u305f\u3044\u306bSet.prototype.has\u3092\u4f7f\u3046\u3053\u3068\u3092\u691c\u8a0e\u3057\u305f\u306e\u3067\u3059\u304c\u3001\u610f\u5916\u3068\u3001 const target = 'user-8823'; const str \u2026","version":"1.0"}