babu_babu_baboo https://blog.hatena.ne.jp/babu_babu_baboo/ babu_babu_babooのゴミ箱 https://babu-babu-baboo.hateblo.jp/ JavaScript const repeatedCombination = (function (n) (function (r, c, i, a) r.concat ((1 == n) ? [c] : a.reduce (repeatedCombination (n-1), []) //←arguments.callee じゃないのがイマイチ .map ((function (q) this.concat (q)), [c])))) //←これを外側で定義 var enzan = ['+', '-', '*', '/']; alert(enzan.reduce (repeatedCombination (4),… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fbabu-babu-baboo.hateblo.jp%2Fentry%2F20110428%2F1303957959" title="偶然の産物？組み合わせを返すコード - babu_babu_babooのゴミ箱" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2011-04-28 11:32:39 rich https://babu-babu-baboo.hateblo.jp/entry/20110428/1303957959 1.0 100%