Jefffrey commented on code in PR #10838:
URL: https://github.com/apache/arrow-rs/pull/10838#discussion_r3860365179
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arrow-data/src/data.rs:
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@@ -471,7 +476,57 @@ impl ArrayData {
self.len == 0
}
- /// Returns the offset of this [`ArrayData`]
+ /// Returns the offset in elements of this [`ArrayData`]
+ ///
+ /// The offset applies to [`Self::buffers`] and [`Self::child_data`],
+ /// but does NOT apply to [`Self::nulls`], which always represents exactly
+ /// [`Self::len`] elements.
+ ///
+ /// # Offsets for Non-nested types
+ ///
+ /// For non-nested types, the offset skips leading elements in the buffers.
+ /// Logical element `i` is stored at physical position `offset + i`.
+ ///
+ /// For example, with `offset = 2` and `len = 3` the following array
Review Comment:
<img width="1200" height="675" alt="Image"
src="https://github.com/user-attachments/assets/2244fda3-5b13-4090-b971-eb861b658ef4";
/>
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