Method writeToFile

src/data/slot_reader.cc:82–86

    SArray<uint64> col_idx;
    SArray<uint16> row_siz;
    bool writeToFile(const string& name) {
      return val.compressTo().writeToFile(name+".value")
          && col_idx.compressTo().writeToFile(name+".colidx")
          && row_siz.compressTo().writeToFile(name+".rowsiz");
    }
  };
  VSlot vslots[kSlotIDmax];
  uint32 num_ex = 0;