public static SimilarUser[] getTopNFriends(List<SimilarUser> similarUsers, int topN) {
// sort friends based on itemAgreement
SimilarUser.sort(similarUsers);
// select top N friends
List<SimilarUser> topFriends = new ArrayList<SimilarUser>();
for (SimilarUser f : similarUsers) {
if (topFriends.size() >= topN) {
// have enough friends.
break;
}
// This is useful when we compose results from different recommenders
if (!topFriends.contains(f)) {
topFriends.add(f);
}
}
return topFriends.toArray(new SimilarUser[topFriends.size()]);
}
