sdf-jkl commented on issue #8847:
URL: https://github.com/apache/arrow-rs/issues/8847#issuecomment-3916465479
It seems like the #8733 implementation is the same as one in #6624.
Impls respectively:
```rust
fn boolean_mask_from_selectors(selectors: &[RowSelector]) -> BooleanBuffer {
let total_rows: usize = selectors.iter().map(|s| s.row_count).sum();
let mut builder = BooleanBufferBuilder::new(total_rows);
for selector in selectors {
builder.append_n(selector.row_count, !selector.skip);
}
builder.finish()
}
```
```rust
impl From<RowSelection> for BooleanRowSelection {
fn from(selection: RowSelection) -> Self {
let total_rows = selection.row_count();
let mut builder = BooleanBufferBuilder::new(total_rows);
for selector in selection.iter() {
if selector.skip {
builder.append_n(selector.row_count, false);
} else {
builder.append_n(selector.row_count, true);
}
}
BooleanRowSelection {
selector: builder.finish(),
}
}
}
```
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