unicode

requirt 'cgi'
def to_utf8(unicode_string)
unicode_string.gsub(/\\u\w{4}/) do |s|
str = s.sub(/\\u/, "").hex.to_s(2)
if str.length < 8
CGI.unescape(str.to_i(2).to_s(16).insert(0, "%"))
else
arr = str.reverse.scan(/\w{0,6}/).reverse.select{|a| a != ""}.map{|b| b.reverse}
hex = lambda do |s|
(arr.first == s ? "1" * arr.length + "0" * (8 - arr.length - s.length) + s : "10" + s).to_i(2).to_s(16).insert(0, "%")
end
CGI.unescape(arr.map(&hex).join)
end
end
end