unicode

requirt'cgi'

defto_utf8(unicode_string)

unicode_string.gsub(/\\u\w{4}/)do|s|

str=s.sub(/\\u/,"").hex.to_s(2)

ifstr.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=lambdado|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