#!/usr/bin/ruby
class Array
  def to_cells(tag)
    self.map { |c| "<#{tag}>#{c}</#{tag}>" }.join
  end
end

rows = [{"A"=>"foo", "B"=>"bar"},]
headers = "<tr>#{rows[0].keys.to_cells('th')}</tr>"
cells = rows.map do |row|
  "<tr>#{row.values.to_cells('td')}</tr>"
end.join("\n  ")
table = "<table border='1' class='reference' style='border-collapse:collapse'>
  #{headers}
  #{cells}
</table>"
puts table