def dig(row,array_of_keys)
    return row if array_of_keys.count == 0
    current = case row
                when Hash
                  current = row[array_of_keys.shift]
                when Array
                  current = (row.find { |x| x.key?(key)} ||{})[key]
                else
                  nil
              end

    dig(current, array_of_keys)
end