C# (CSharp) NReco.CF.Taste.Impl.Recommender SamplingCandidateItemsStrategy Examples

Example #1

File: SamplingCandidateItemsStrategyTest.cs Project: techmobstudios/Certified-Mixtapes-Recommender

        public void testStrategy()
        {
            List<IPreference> prefsOfUser123 = new List<IPreference>();
            prefsOfUser123.Add(new GenericPreference(123L, 1L, 1.0f));

            List<IPreference> prefsOfUser456 = new List<IPreference>();
            prefsOfUser456.Add(new GenericPreference(456L, 1L, 1.0f));
            prefsOfUser456.Add(new GenericPreference(456L, 2L, 1.0f));

            List<IPreference> prefsOfUser789 = new List<IPreference>();
            prefsOfUser789.Add(new GenericPreference(789L, 1L, 0.5f));
            prefsOfUser789.Add(new GenericPreference(789L, 3L, 1.0f));

            IPreferenceArray prefArrayOfUser123 = new GenericUserPreferenceArray(prefsOfUser123);

            FastByIDMap<IPreferenceArray> userData = new FastByIDMap<IPreferenceArray>();
            userData.Put(123L, prefArrayOfUser123);
            userData.Put(456L, new GenericUserPreferenceArray(prefsOfUser456));
            userData.Put(789L, new GenericUserPreferenceArray(prefsOfUser789));

            IDataModel dataModel = new GenericDataModel(userData);

            ICandidateItemsStrategy strategy =
            new SamplingCandidateItemsStrategy(1, 1, 1, dataModel.GetNumUsers(), dataModel.GetNumItems());

            FastIDSet candidateItems = strategy.GetCandidateItems(123L, prefArrayOfUser123, dataModel);
            Assert.True(candidateItems.Count() <= 1);
            Assert.False(candidateItems.Contains(1L));
        }

Example #2

        public void testStrategy()
        {
            List <IPreference> prefsOfUser123 = new List <IPreference>();

            prefsOfUser123.Add(new GenericPreference(123L, 1L, 1.0f));

            List <IPreference> prefsOfUser456 = new List <IPreference>();

            prefsOfUser456.Add(new GenericPreference(456L, 1L, 1.0f));
            prefsOfUser456.Add(new GenericPreference(456L, 2L, 1.0f));

            List <IPreference> prefsOfUser789 = new List <IPreference>();

            prefsOfUser789.Add(new GenericPreference(789L, 1L, 0.5f));
            prefsOfUser789.Add(new GenericPreference(789L, 3L, 1.0f));

            IPreferenceArray prefArrayOfUser123 = new GenericUserPreferenceArray(prefsOfUser123);

            FastByIDMap <IPreferenceArray> userData = new FastByIDMap <IPreferenceArray>();

            userData.Put(123L, prefArrayOfUser123);
            userData.Put(456L, new GenericUserPreferenceArray(prefsOfUser456));
            userData.Put(789L, new GenericUserPreferenceArray(prefsOfUser789));

            IDataModel dataModel = new GenericDataModel(userData);

            ICandidateItemsStrategy strategy =
                new SamplingCandidateItemsStrategy(1, 1, 1, dataModel.GetNumUsers(), dataModel.GetNumItems());

            FastIDSet candidateItems = strategy.GetCandidateItems(123L, prefArrayOfUser123, dataModel);

            Assert.True(candidateItems.Count() <= 1);
            Assert.False(candidateItems.Contains(1L));
        }