文字列をn文字ずつ&1文字ずつに分割したいのですが x = "ABCDEFGHIJKLMNOPQRSTUVWXY" x = x.scan(/.{5}/) x.collect!{|y|y.scan(/./)} p x =>[["A","B","C","D","E"],["F","G","H","I","J"],["K","L","M","N","O"],["P","Q","R","S","T"],["U","V","W","X","Y"]] みたいに書くと都度、正規表現によるマッチが行われるので遅いです もっと高速に実行する方法があったら教えてください。よろしくお願いします