Kasen Kasen(下線)という名前のGemです. ↑は僕が2時間くらいかけて作ったGemのロゴマーク的なやつです. (両端の曲度に拘りアリ) Github: https://github.com/gogotanaka/_ Rubygems: https://rubygems.org/gems/kasen タイピング量が0.2%減る 0.2%て響きが好きなだけで実際はもっとあるかも!? require 'kasen' # 以下の2つは等しい [[1, 2], [3, 4]].map &_[1] [[1, 2], [3, 4]].map { |ary| ary[1] } # 以下の2つは等しい ['0', '1', '2'].select &_.to_i.zero? ['0', '1', '2'].select { |s| s.to_i.zero? } # 以下の2つは等しい [['1'
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