thr3a https://blog.hatena.ne.jp/thr3a/ 動かざることバグの如し https://blog.turai.work/ ruby ぶっちゃけまとめ def display mat mat.each do |row| puts row.join(' ') end puts end matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] display matrix display matrix.reverse.transpose #=> 右回転 display matrix.transpose.reverse #=> 左回転 display matrix.reverse.map(&:reverse) #=> 180度回転 実行結果 1 2 3 4 5 6 7 8 9 7 4 1 8 5 2 9… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.turai.work%2Fentry%2F20160424%2F1461504012" title="Rubyで行列の回転を行いたい - 動かざることバグの如し" 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 2016-04-24 22:20:12 rich https://blog.turai.work/entry/20160424/1461504012 1.0 100%