vertexclique commented on a change in pull request #8688:
URL: https://github.com/apache/arrow/pull/8688#discussion_r526511029
##########
File path: rust/arrow/src/compute/kernels/boolean.rs
##########
@@ -457,4 +517,42 @@ mod tests {
assert_eq!(true, res.value(2));
assert_eq!(false, res.value(3));
}
+
+ fn assert_array_eq<T: ArrowNumericType>(
+ expected: PrimitiveArray<T>,
+ actual: ArrayRef,
+ ) {
+ let actual = actual
+ .as_any()
+ .downcast_ref::<PrimitiveArray<T>>()
+ .expect("Actual array should unwrap to type of expected array");
+
+ for i in 0..expected.len() {
+ if expected.is_null(i) {
+ assert!(actual.is_null(i));
+ } else {
+ assert_eq!(expected.value(i), actual.value(i));
+ }
+ }
+ }
+
Review comment:
In my PR if you use `slicing` method and then write a method to align
bit slices with smth along the lines:
```
unsafe {
let (_, data, _) = self.bit_slice.align_to::<u8>();
let dest = data.as_slice();
}
```
you will get two aligned middle bit domains. then you can check bit slices
however you want to.
slicing method:
https://github.com/apache/arrow/pull/8664/files#diff-715ddfbc534281523a73117d3bf4986d69d8a375dd320bc19f83298d3ba7ebd6R52
Reference for that method in backing library:
https://docs.rs/bitvec/0.19.4/bitvec/slice/struct.BitSlice.html#method.align_to
If you want subslice of bits from the given slice, for example for this
thing that you said:
> After the operation, "right shift" the resulting bitmap so it is based on
left_offset again (since the resulting data is based on left array)
You can do `.copy_from_bitslice` and copy into correct position in the
middle domain.
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