def get_columns list
  list.map{|data| data.keys}.flatten.uniq
end

def print_line items
  @lines_to_print << items
end

def print_columns columns
  print_line columns.map(&:to_s)
  print_line ["_"]* columns.count
end

def print_data data, columns
  print_line columns.map{|col| data[col].to_s}
end

def print_all
  max_width = []
  @lines_to_print.each do |line|
    line.each_with_index do |col_val, index|
      if (max_width[index]||0)< col_val.size
        max_width[index] = col_val.size
      end
    end
  end

  @lines_to_print.each do |line|
    line.each_with_index do |item, index|
      print item.rjust(max_width[index])
      print "|"
    end
    print "\n"
  end
end

def table list
  @lines_to_print = []
  list = Array(list).map(&:to_hash)
  columns = get_columns list

  print_columns columns
  list.each do |data|
    print_data data, columns
  end

  print_all
end