troter https://blog.hatena.ne.jp/troter/ 放牧日記 https://troter.hatenablog.jp/ Ruby QUIZ 奇数のみ class OddMagicSquare attr_reader :square, :order def initialize(order) @order = order @square = case when order % 2 == 1 then odd_order else make_square(@order) end end def show @square ? @square.map {|l| l.join(",") }.join("\n") : "" end private def make_square(order) Array.new(order) {|i| Arr… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Ftroter.hatenablog.jp%2Fentry%2F20070520%2F1179664354" title=" Magic Squares (#124) - 放牧日記" 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 2007-05-20 21:32:34 rich https://troter.hatenablog.jp/entry/20070520/1179664354 1.0 100%