回答編集履歴
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リンクミスを修正
test
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@@ -1,6 +1,6 @@
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一度配列にしてから[Array.prototype.includes](https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Array/includes)すれば一撃だし、
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[アロー関数](https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Functions/Arrow_functions)と[Array.prototype.find](https://developer.mozilla.org/ja/docs/Web/JavaScript/Reference/Global_Objects/Array/find)の併用でやってもいい
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@@ -17,8 +17,6 @@
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// ----- find -----
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var hoge = 123, piyo = 123, fuga = 123;
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