diff -r 34feeb53c0ba -r 0315d9983cd0 main_marking2/danube_test6.scala --- a/main_marking2/danube_test6.scala Sun Jan 15 10:58:13 2023 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,35 +0,0 @@ - -import M2._ - -// first test - - -def urban_groupById(ratings: List[(String, String)]) = - ratings.groupBy(_._1).view.mapValues(_.map(_._2)).toMap - -def urban_get_csv_file(name: String) : List[String] = { - import io.Source - import scala.util._ - val csv = Source.fromFile(name) - csv.mkString.split("\n").toList.drop(1) -} - -def urban_process_ratings(lines: List[String]) : List[(String, String)] = { - for (cols <- lines.map(_.split(",").toList); - if (cols(2).toFloat >= 4)) yield (cols(0), cols(1)) -} - -def urban_process_movies(lines: List[String]) : List[(String, String)] = { - for (cols <- lines.map(_.split(",").toList)) yield (cols(0), cols(1)) -} - - -val urban_good_ratings = process_ratings(urban_get_csv_file("ratings.csv")) -val urban_movie_names = process_movies(urban_get_csv_file("movies.csv")).toMap - -val urban_ratings_map = urban_groupById(urban_good_ratings) - -assert((for (n <- List("1", "2", "3", "4", "5")) yield { - recommendations(urban_ratings_map, urban_movie_names, n).length -}) == List(2, 2, 2, 0, 2)) -