くだすれPython(超初心者用) その36

567 名前：デフォルトの名無しさん mailto:sage [2018/02/26(月) 15:55:59.62 ID:NcBRNf65.net] before_data = [[100,50,250,300], [101,20,150,150], [101,30,200,150], [102,80,100,200], [102,20,150,200]] hashed_data = before_data.group_by { |row| row[0] } #=> {100=>[[100, 50, 250, 300]], 101=>[[101, 20, 150, 150], [101, 30, 200, 150]], 102=>[[102, 80, 100, 200], [102, 20, 150, 200]]} # 配列の蓄積器に、結果を入れながら、処理を繰り返す result = hashed_data.each_with_object([]) do | (key, rows), ary | if rows.length >= 2 puts "rows" p rows # 配列の蓄積器に、結果を入れながら、処理を繰り返す r = rows.each_with_object([]) do | row, ary2 | if ary2.length == 0 ary2.push *row # 展開 ary2[2] = row[1] * row[2] else ary2[1] += row[1] ary2[2] = ary2[2] + row[1] * row[2] end end r[2] = r[2] / r[1].to_f ary.push r else ary.push rows.flatten end end p result Ruby で作った。結果 [[100, 50, 250, 300], [101, 50, 180.0, 150], [102, 100, 110.0, 200]]

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