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$KCODE = "u"

$ ruby -Ku huypizdadjigurda.rb

# encoding: utf-8

gem install unicode

# encoding: utf-8
require 'unicode'

class String
   def downcase
     Unicode::downcase self
   end
   def downcase!
     self.replace downcase
   end
   def upcase
     Unicode::upcase self
   end
   def upcase!
     self.replace upcase
   end
   def capitalize
     Unicode::capitalize self
   end
   def capitalize!
     self.replace capitalize
   end
end

  require 'unicode'

  $KCODE = 'UTF-8'   # only used when encoding is not specified.

  u = "\352\260\200\353\202\230\353\213\244".to_u
  u.length           #=> 3
  u.to_a             #=> [44032, 45208, 45796], array of codepoint
  u.inspect          #=> <U+AC00><U+B098><U+B2E4>
  u.to_s             #=> "\352\260\200\353\202\230\353\213\244"
  u.encoding = "EUC-KR"
  u.to_s             #=> "\260\241\263\252\264\331"
  u.to_s("UTF-8")    #=> "\352\260\200\353\202\230\353\213\244"
  u.length           #=> 3
  u = "\260\241\263\252\264\331".to_u("EUC-KR")
  u.inspect          #=> <U+AC00><U+B098><U+B2E4>