question: public static List < List < Episode > > compareEpisodes ( List < Episode > localEpisodes , List < Episode > serverEpisodes ) { Map < String , Episode > localEpisodeMap = convertListToMap ( localEpisodes ) ; Map < String , Episode > serverEpisodeMap = convertListToMap ( serverEpisodes ) ; List < Episode > episodesToAdd = getNewEpisodes ( localEpisodeMap , serverEpisodeMap ) ; List < Episode > episodesToUpdate = getAlteredEpisodes ( localEpisodeMap , serverEpisodeMap ) ; List < List < Episode > > episodeComparison = new ArrayList < > ( ) ; Log . d ( TAG , "Number of channels to update: " + episodesToUpdate . size ( ) ) ; episodeComparison . add ( UPDATE , episodesToUpdate ) ; Log . d ( TAG , "Number of channels to add: " + episodesToAdd . size ( ) ) ; episodeComparison . add ( ADD , episodesToAdd ) ; return episodeComparison ; }
target:  Compares episodes stored locally to episodes from the server, and returns whats new & whats changed