2つの配列を同時にeach ary1 = [1,2,3] ary2 = [1,2,3] ary1.zip(ary2).each{|a1,a2| p a1, a2}ちなみに配列数が違う場合は以下のような挙動 [1,2,3].zip([1,2]) => [ [1,1], [2,2], [3,nil] ] [1,2].zip([1,2,3]) => [ [1,1], [2,2] ] 次の要素を参照しなが…