ritchie46 commented on a change in pull request #9469:
URL: https://github.com/apache/arrow/pull/9469#discussion_r574510747
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File path: rust/arrow/src/array/array.rs
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@@ -326,6 +328,141 @@ pub fn new_empty_array(data_type: &DataType) -> ArrayRef {
let data = ArrayData::new_empty(data_type);
make_array(Arc::new(data))
}
+/// Creates a new array with null slots of `length`
+pub fn new_array_with_nulls(data_type: &DataType, length: usize) -> ArrayRef {
+ let null_buf = Buffer::from(vec![0u8; bit_util::ceil(length, 8)]);
Review comment:
Could something like this reduce a unnecessary copy?
```rust
let null_buff = MutableBuffer::new_null(length).into();
```
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