Function TakeMiddleElements

catboost/libs/train_lib/eval_feature.cpp:428–436

}

static void TakeMiddleElements(
    ui32 offset,
    ui32 count,
    TVector<NCB::TArraySubsetIndexing<ui32>>* subsets
) {
    CB_ENSURE_INTERNAL(offset + count <= subsets->size(), "Dataset permutation logic failed");
    TVector<NCB::TArraySubsetIndexing<ui32>>(subsets->begin() + offset, subsets->end()).swap(*subsets);
    subsets->resize(count);
}

static void PrepareTimeSplitFolds(
    typename TTrainingDataProviders::TDataPtr srcData,