162 // what the recommendations function in (6) produces (this

   162 // what the recommendations function in (6) produces (this

   163 // can take a few seconds). Put all recommendations into a list 

   163 // can take a few seconds). Put all recommendations into a list 

   164 // (of strings) and count how often the strings occur in

   164 // (of strings) and count how often the strings occur in

   165 // this list. This produces a list of string-int pairs,

   165 // this list. This produces a list of string-int pairs,

   166 // where the first component is the movie name and the second

   166 // where the first component is the movie name and the second

   168 // Sort all the pairs according to the number

   168 // Sort all the pairs according to the number

   169 // of times they were recommended (most recommended movie name 

   169 // of times they were recommended (most recommended movie name 

   170 // first).

   170 // first).

   171 

   171 

   172 def most_recommended(recs: Map[String, List[String]],

   172 def most_recommended(recs: Map[String, List[String]],