Printing different families of unicode characters with ruby

FAMILIES = {
  regular:           '0x0041',
  circled:           '0x24B6',
  fraktur:           '0x1D504',
  squared_latin:     '0x1F130',
  math_double:       '0x1D538',
  math_bold:         '0x1D468',
  math_bold_fraktur: '0x1D56C',
  math_script:       '0x1D49C',
  math_monospace:    '0x1D670'
}


def codepoints_from_base(hexstr, spacer = '')
  a = hexstr.to_i(16)
  z = a + 25

  (a..z)
    .map{ |ord| [ord].pack('U') }
    .join(spacer)
end


longest_length = FAMILIES
                   .max_by{ |name, _| name.to_s.length }
                   .shift
                   .to_s
                   .length + 2
FAMILIES
  .map{ |fam_name, hexstr| "#{fam_name}:".ljust(longest_length) + codepoints_from_base(hexstr, ' ') }
  .join("\n")
  .tap{ |lines| puts lines }