Function non_zero_length

cpp/src/arrow/sparse_tensor.h:165–165

\brief Return the number of non zero values in the sparse tensor related to this sparse index

  /// \brief Return the number of non zero values in the sparse tensor related
  /// to this sparse index
  int64_t non_zero_length() const override { return coords_->shape()[0]; }

  /// \brief Return whether a sparse tensor index is canonical, or not.
  /// If a sparse tensor index is canonical, it is sorted in the lexicographical order,