amol- commented on a change in pull request #11197:
URL: https://github.com/apache/arrow/pull/11197#discussion_r713034657
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File path: cpp/examples/arrow/row_wise_conversion_example.cc
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@@ -61,51 +65,52 @@ arrow::Status VectorToColumnarTable(const
std::vector<struct data_row>& rows,
arrow::MemoryPool* pool = arrow::default_memory_pool();
Int64Builder id_builder(pool);
- DoubleBuilder cost_builder(pool);
- ListBuilder components_builder(pool, std::make_shared<DoubleBuilder>(pool));
- // The following builder is owned by components_builder.
- DoubleBuilder& cost_components_builder =
- *(static_cast<DoubleBuilder*>(components_builder.value_builder()));
+ Int64Builder components_builder(pool);
+ ListBuilder component_cost_builder(pool,
std::make_shared<DoubleBuilder>(pool));
+ // The following builder is owned by component_cost_builder.
+ DoubleBuilder& component_item_cost_builder =
+ *(static_cast<DoubleBuilder*>(component_cost_builder.value_builder()));
Review comment:
I think it would be easier to follow if we made
`component_item_cost_builder` a pointer instead of a reference.
That would make much more obvious that `component_item_cost_builder` is the
`value_builder` of `component_cost_builder` and we are not creating anything
new.
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