slice

# File activesupport/lib/active_support/multibyte/handlers/utf8_handler.rb, line 172
      def slice(str, *args)
        if (args.size == 2 && args.first.is_a?(Range))
          raise TypeError, 'cannot convert Range into Integer' # Do as if we were native
        elsif args[0].kind_of? Range
          cps = u_unpack(str).slice(*args)
          cps.nil? ? nil : cps.pack('U*')
        elsif args.size == 1 && args[0].kind_of?(Numeric)
          u_unpack(str)[args[0]]
        else
          u_unpack(str).slice(*args).pack('U*')
        end
      end