yuhei_kagaya https://blog.hatena.ne.jp/yuhei_kagaya/ yuhei.kagaya https://yuheikagaya.hatenablog.jp/ ruby Rangeの範囲 p (1..10).to_a p (1...10).to_a [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] [1, 2, 3, 4, 5, 6, 7, 8, 9] 多重代入とflatten 複数の引数でも、配列でも、どっちでも引数にとれて便利 def f(*params) params.flatten.reduce { |sum, v| sum + v } end p f 10, 20, 30 p f [10, 20, 30] p f 10, [20, 30] 60 60 60 Proc#curry カリー化したProcオブジェクトを返す def f(&bl… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyuheikagaya.hatenablog.jp%2Fentry%2F2015%2F07%2F17%2F191047" title="最近学んだRuby - yuhei.kagaya" 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 2015-07-17 19:10:47 rich https://yuheikagaya.hatenablog.jp/entry/2015/07/17/191047 1.0 100%