gistfile1.js

      return {
      name:list.name, 
      videos:videos.filter(function(video){
    	return list.id === video.listId;
      }).concatMap(function(video){
        return Array.zip(
          bookmarks.filter(function(bookmark){
            return video.id === bookmark.videoId;
          }),
          boxarts.filter(function(boxart){
          	return video.id === boxart.videoId;
          }).reduce(function(keep, bookmark){
            return keep.width > bookmark.width ? bookmark : keep;
          }),
          function(a, b){
            return {
              id:video.id,
              title:video.title,
              time:a.time,
              boxart:b.url
            };
          }
        
        );
      })};                                                 
  });