Method LinesFileSampleByIndices

catboost/libs/data/sampler.cpp:138–158

TDataProviderPtr NCB::LinesFileSampleByIndices(const TDataProviderSampleParams& params, TConstArrayRef<ui32> indices) {
    TVector<ui64> sortedIndices(indices.begin(), indices.end());
    Sort(sortedIndices);

    const auto& datasetReadingParams = params.DatasetReadingParams;

    auto indexedDataReader = MakeHolder<TIndexedSubsetLineDataReader>(
        GetLineDataReader(
            datasetReadingParams.PoolPath,
            datasetReadingParams.ColumnarPoolFormatParams.DsvFormat,
            /*keepInOrder*/ true
        ),
        std::move(sortedIndices)
    );

    return DataProviderSamplerReorderByIndices(
        params,
        ReadDatasetForSampler(params, /*loadSampleIds*/false, std::move(indexedDataReader)),
        indices
    );
}

TDataProviderPtr NCB::DataProviderSamplerReorderBySampleIds(
    const TDataProviderSampleParams& params,