Learning RxJs

ex14

return movieLists.
    concatMap(function(category){
      debugger;
      return category.videos.concatMap(function(video){
        debugger;
        return video.boxarts.filter(function(box){
          //safe coercion
          return box.width=='150'
        }).map(function(box){
          debugger;
          return {
            'id': video.id,
            'title' : video.title,
            'boxart' : box.url
          }
        })
      })
    })

http://jhusain.github.io/learnrx/