リファクタリング by りおん#11
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* Array.transpose を使う * array という変数名は Array（クラス名）と紛らわしいので変更 * より意味が伝わりやすいよう、split(¥n) から each_line に変更
* input/output行列の形・内容がひと目で分かるようヒアドキュメントを使う
* メソッドチェーン化
This reverts commit 6eef2f1.
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Array#transposeを使うArrayクラスには行列を転置するメソッド
transposeが既に用意されています。メソッドチェーン化する
一時変数を撤廃することができ、かつやりたいことがより明確に記述できます。
[テストコード] ヒアドキュメントを使って行列を表現する
ヒアドキュメントを使えば、より明確に行列を表現できます。
※ただし、テストコードが長くなるので、テストコード量によっては\nを使って1行で表現したほうがいい場合もあるかと。