I'm building an app in Rails that needs to convert a Twitter ID into the Twitter username. This is the code that pulls the ID.
url = 'http://twitter.com/' + params[:username]
buffer = open(url, 'UserAgent' => 'irb').read
@vouched_user_twitter_id = buffer[/\d+(?=\.rss)/]
How do I use that number to pull the username once I no longer have params.