by the way, this works:
but i am sure there are more elegant solutions.
<%
begin
t = ''
s = Iconv.conv("UTF-32", "UTF-8", some_utf8_string)
(s.length / 4).times do |i|
b3 = s[i*4 + 2]
b4 = s[i*4 + 3]
t += ("&#x" + "%02X" % b3) + ("%02X" % b4) + ";"
end
rescue => details
t = "exception " + details
end
%>
<%= t %>
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