// Утилитный метод, позволяющий получить массив рейтингов по массиву пользовательских id
public double[] getRatingsForItemList(int[] userIds)
{
double[] ratings = new double[userIds.Length];
for (int i = 0; i < userIds.Length; i++)
{
GeneralRating r = getUserRating(userIds[i]);
if (r == null)
{
throw new Exception("Item doesn't have rating by specified user id (" +
"userId=" + userIds[i] + ", itemId=" + getId());
}
ratings[i] = r.getRating();
}
return(ratings);
}
/*
* Utility method to extract array of ratings based on array of item ids.
*/
public double[] getRatingsForItemList(int[] itemIds)
{
double[] ratings = new double[itemIds.Count()];
for (int i = 0, n = itemIds.Count(); i < n; i++)
{
GeneralRating r = getItemRating(itemIds[i]);
if (r == null)
{
throw new Exception(
"User doesn't have specified item id (" +
"userId=" + UserId + ", itemId=" + itemIds[i]);
}
ratings[i] = r.getRating();
}
return(ratings);
}