QtWebkit practice with QtRuby

I wrote QtWebKit sample program with Qt in phosphorescence: QtWebKit practice. Next, let's write corresponding program with QtRuby.

require 'Qt4'
require 'qtwebkit'

Qt::Application.new(ARGV) do
Qt::WebView.new do
self.load Qt::Url.new('http://www.wolframalpha.com/')
show
end
exec
end

Then run, succeed.