Как преобразовать с символами с диакритикой Ruby в HTML специальные объекты

I had explicitly set the $KCODE to make your example work. Also, make sure your source file is actually encoded as UTF-8!

# coding: utf-8
require 'rubygems'
require 'htmlentities'
require 'unicode'
$KCODE = 'UTF-8'
coder = HTMLEntities.new
string = "Scròfina"
puts coder.encode(string, :named)