Twitter Link Helper

twitter_links.rb

def twitter_links(txt)
    match = []
    #link @user
    if match = txt.scan(/@([A-Za-z0-9_]+)/i)
      match.each do |user|
        txt.gsub!('@'+user[0], '<a href="http://twitter.com/' + user[0] + '">@' + user[0] + '</a>')
      end
    end
  #link #hash_tags
  if match = txt.scan(/\B#\w*[a-zA-Z]+\w*/i)
      match.each do |m|
        txt.gsub!(m,'<a href="http://twitter.com/search?q='+ m + '">' + m + '</a>')
      end
    end
  txt
  end