Примеры Ruby:
# encoding: UTF-8
puts RUBY_VERSION # => 1.9.2
def Σ(arr)
arr.inject(:+)
end
Π = Math::PI
str = "abc日本def"
puts Σ [4,6,8,3] # => 21
puts Π # => 3.141592653589793
puts str.scan(/\p{Han}+/) # => 日本
p Encoding.name_list # not just utf8
#["ASCII-8BIT", "UTF-8", "US-ASCII", "Big5", "Big5-HKSCS", "Big5-UAO", "CP949", "Emacs-Mule", "EUC-JP", "EUC-KR", "EUC-TW", "GB18030", "GBK", "ISO-8859-1", "ISO-8859-2", "ISO-8859-3", "ISO-8859-4", "ISO-8859-5", "ISO-8859-6", "ISO-8859-7", "ISO-8859-8", "ISO-8859-9", "ISO-8859-10", "ISO-8859-11", "ISO-8859-13", "ISO-8859-14", "ISO-8859-15", "ISO-8859-16", "KOI8-R", "KOI8-U", "Shift_JIS", "UTF-16BE", "UTF-16LE", "UTF-32BE", "UTF-32LE", "Windows-1251", "BINARY", "IBM437", "CP437", "IBM737", "CP737", "IBM775", "CP775", "CP850", "IBM850", "IBM852", "CP852", "IBM855", "CP855", "IBM857", "CP857", "IBM860", "CP860", "IBM861", "CP861", "IBM862", "CP862", "IBM863", "CP863", "IBM864", "CP864", "IBM865", "CP865", "IBM866", "CP866", "IBM869", "CP869", "Windows-1258", "CP1258", "GB1988", "macCentEuro", "macCroatian", "macCyrillic", "macGreek", "macIceland", "macRoman", "macRomania", "macThai", "macTurkish", "macUkraine", "CP950", "CP951", "stateless-ISO-2022-JP", "eucJP", "eucJP-ms", "euc-jp-ms", "CP51932", "eucKR", "eucTW", "GB2312", "EUC-CN", "eucCN", "GB12345", "CP936", "ISO-2022-JP", "ISO2022-JP", "ISO-2022-JP-2", "ISO2022-JP2", "CP50220", "CP50221", "ISO8859-1", "Windows-1252", "CP1252", "ISO8859-2", "Windows-1250", "CP1250", "ISO8859-3", "ISO8859-4", "ISO8859-5", "ISO8859-6", "Windows-1256", "CP1256", "ISO8859-7", "Windows-1253", "CP1253", "ISO8859-8", "Windows-1255", "CP1255", "ISO8859-9", "Windows-1254", "CP1254", "ISO8859-10", "ISO8859-11", "TIS-620", "Windows-874", "CP874", "ISO8859-13", "Windows-1257", "CP1257", "ISO8859-14", "ISO8859-15", "ISO8859-16", "CP878", "SJIS", "Windows-31J", "CP932", "csWindows31J", "MacJapanese", "MacJapan", "ASCII", "ANSI_X3.4-1968", "646", "UTF-7", "CP65000", "CP65001", "UTF8-MAC", "UTF-8-MAC", "UTF-8-HFS", "UCS-2BE", "UCS-4BE", "UCS-4LE", "CP1251", "UTF8-DoCoMo", "SJIS-DoCoMo", "UTF8-KDDI", "SJIS-KDDI", "ISO-2022-JP-KDDI", "stateless-ISO-2022-JP-KDDI", "UTF8-SoftBank", "SJIS-SoftBank", "locale", "external", "filesystem", "internal"]
Действительно, заглавные буквы не поддерживаются для символов, отличных от ascii, с указанием причины.