tustvold commented on code in PR #5760:
URL: https://github.com/apache/arrow-rs/pull/5760#discussion_r1598231923
##########
arrow-array/src/builder/boolean_builder.rs:
##########
@@ -166,6 +166,14 @@ impl BooleanBuilder {
BooleanArray::from(array_data)
}
+ /// Returns the current values buffer as a slice
+ ///
+ /// Boolean values are bit-packed into bytes, so to read the i-th boolean,
+ /// you must compute `values_slice[i / 8] & (1 << (i % 8)) == 0`.
Review Comment:
Perhaps we could direct people to
https://docs.rs/arrow-buffer/latest/arrow_buffer/bit_util/fn.get_bit.html ?
It should also be faster
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