gistfile1.txt

  def fetchEpisodes(&block)
    NSLog("will fetch")
    block.send(:retain)
    Dispatch::Queue.concurrent.async do
      data = NSString.stringWithContentsOfURL(NSURL.URLWithString(@feedUrl))
      NSLog("loaded #{data.length} bytes")
      rss = SimpleRSS.parse(data.to_s)
      NSLog("loaded #{rss.items.length} items")
      episodes = rss.items
      # episodes = rss.items.map do |item|
      #   item[:thumb_url] = sprintf("http://railscasts.com/assets/episodes/stills/%03d-%s.png",
      #     item[:title][1..-1].to_i, item[:guid])
      #   item
      # end
      
      NSLog("go dispatch back")
      Dispatch::Queue.main.sync do
        NSLog("go dispatch back to #{block} sync")
        block.call(episodes)
        block.send(:release)
      end
    end
  end