HaoYang670 commented on code in PR #2034:
URL: https://github.com/apache/arrow-rs/pull/2034#discussion_r917390798
##########
arrow/src/array/builder/generic_list_builder.rs:
##########
@@ -136,7 +131,7 @@ where
let offset_buffer = self.offsets_builder.finish();
let null_bit_buffer = self.bitmap_builder.finish();
- self.offsets_builder.append(self.len);
+ self.offsets_builder.append(OffsetSize::zero());
Review Comment:
Append a leading zero to the offset buffer, so that the builder could be
reused.
I don't change this behaviour.
Originally, we had
```rust
self.offsets_builder.append(self.len)
```
where `self.len` is zero.
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