Transliterate to lowercase, letters and numbers

gistfile1.rb

# Based on permalink_fu by Rick Olsen
def transliterate(str)
  # Escape str by transliterating to UTF-8 with Iconv
  s = Iconv.iconv('ascii//ignore//translit', 'utf-8', str).to_s

  # Downcase string
  s.downcase!

  # Remove apostrophes so isn't changes to isnt
  s.gsub!(/\'/, '')

  # Replace any non-letter or non-number character with a space
  s.gsub!(/[^A-Za-z0-9]+/, ' ')

  # Remove spaces from beginning and end of string
  s.strip!

  # Replace groups of spaces with single hyphen
  s.gsub!(/\ +/, '-')

  return s
end