Rubyで配列を逆順にして出力する。 | Codetter（こーどったー）

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def my_reverse(x)
  my_reverse_rec(x, [])
end
def my_reverse_rec(x, y)
  if x.length == 0
    y
  else
    my_reverse_rec(x, y.push(x.pop))
  end
end
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