class Formatador def display_table(hashes, keys = nil, &block) headers = keys || [] widths = {} for hash in hashes for key in hash.keys unless keys headers << key end widths[key] = [key.to_s.length, widths[key] || 0, hash[key] && hash[key].to_s.length || 0].max end headers = headers.uniq end if block_given? headers = headers.sort(&block) elsif !keys headers = headers.sort {|x,y| x.to_s <=> y.to_s} end split = "+" if headers.empty? split << '--+' else for header in headers split << ('-' * (widths[header] + 2)) << '+' end end display_line(split) columns = [] for header in headers columns << "#{header}#{' ' * (widths[header] - header.to_s.length)}" end display_line("| #{columns.join(' | ')} |") display_line(split) for hash in hashes columns = [] for header in headers datum = hash[header] || '' columns << "#{datum}#{' ' * (widths[header] - datum.to_s.length)}" end display_line("| #{columns.join(' | ')} |") display_line(split) end nil end end