littlebuddha https://blog.hatena.ne.jp/littlebuddha/ make world https://littlebuddha.hatenadiary.org/ Ruby 制御構造だけで済ませる方法はないのだろうか？ サンプル counter = ['zero', 'first', 'second', 'third', 'forth', 'fifth'] max_length = counter.length - 1 for i in 0..max_length puts "#{i}: #{counter[i]}\n" end 実行結果 % ./sample.rb 0: zero 1: first 2: second 3: third 4: forth 5: fifth 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Flittlebuddha.hatenadiary.org%2Fentry%2F20081110%2F1226298247" title="配列からキーと値を抜き出す - make world" 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 2008-11-10 15:24:07 rich https://littlebuddha.hatenadiary.org/entry/20081110/1226298247 1.0 100%