String#downcase for accented letters in UTF-8?

ruby-talk
1

How can I convert to lowercase a string that contains accented characters
encoded in UTF-8?
String#downcase does not work with accented letters.

···

--
Gioele <dev@gioelebarabucci.com>

2

I hand-coded that:

   # This library redefines String#tr so that it understands UTF-8.
   require 'jcode'

   def normalize_for_sorting(s)
     return nil if s.nil?
     norm = s.downcase
     norm.tr!('ÁÉÍÓÚ', 'aeiou')
     norm.tr!('ÀÈÌÒÙ', 'aeiou')
     norm.tr!('ÄËÏÖÜ', 'aeiou')
     norm.tr!('ÂÊÎÔÛ', 'aeiou')
     norm.tr!('áéíóú', 'aeiou')
     norm.tr!('àèìòù', 'aeiou')
     norm.tr!('äëïöü', 'aeiou')
     norm.tr!('âêîôû', 'aeiou')
     norm
   end

-- fxn

···

On Apr 15, 2006, at 15:08, Gioele Barabucci wrote:

How can I convert to lowercase a string that contains accented characters
encoded in UTF-8?
String#downcase does not work with accented letters.