Deep encode hash

encode_hash.rb

def encode_hash(hashie)
  Hash[
      hashie.collect do |k, v|
        if (v.is_a?(Hash))
          [ k, encode_hash(v) ]
        elsif (v.respond_to?(:encoding))
          [ k, v.dup.force_encoding('UTF-8').encode('UTF-16', {invalid: :replace, undef: :replace, replace: '?'}).encode('UTF-8') ]           
        elsif (v.respond_to?(:to_utf8))
          [ k, v.to_utf8 ]
        else
          [ k, v ]
        end
      end
  ]
end