Function extend_nulls

arrow-data/src/transform/list.rs:50–57

(mutable: &mut _MutableArrayData, len: usize)

}

pub(super) fn extend_nulls<T: ArrowNativeType>(mutable: &mut _MutableArrayData, len: usize) {
    let offset_buffer = &mut mutable.buffer1;

    // this is safe due to how offset is built. See details on `get_last_offset`
    let last_offset: T = unsafe { get_last_offset(offset_buffer) };

    (0..len).for_each(|_| offset_buffer.push(last_offset))
}