Dandandan commented on code in PR #7420:
URL: https://github.com/apache/arrow-rs/pull/7420#discussion_r2050842953
##########
arrow-select/src/interleave.rs:
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@@ -132,12 +132,11 @@ impl<'a, T: Array + 'static> Interleave<'a, T> {
let nulls = match has_nulls {
true => {
- let mut builder = NullBufferBuilder::new(indices.len());
- for (a, b) in indices {
- let v = arrays[*a].is_valid(*b);
- builder.append(v)
- }
- builder.finish()
+ let nulls = BooleanBuffer::collect_bool(indices.len(), |i| {
Review Comment:
This is a pattern that comes up often as well
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