jhorstmann commented on code in PR #9268:
URL: https://github.com/apache/arrow-rs/pull/9268#discussion_r2735289443
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arrow-array/src/array/list_array.rs:
##########
@@ -418,18 +418,43 @@ impl<OffsetSize: OffsetSizeTrait>
GenericListArray<OffsetSize> {
T: ArrowPrimitiveType,
P: IntoIterator<Item = Option<<T as ArrowPrimitiveType>::Native>>,
I: IntoIterator<Item = Option<P>>,
+ {
+ Self::from_nested_iter::<PrimitiveBuilder<T>, T::Native, P, I>(iter)
+ }
+
+ /// Creates a [`GenericListArray`] from a nested iterator of values.
+ /// This method works for any values type that has a corresponding builder
that implements the
+ /// `Extend` trait. That includes all numeric types, booleans, binary and
string types and also
+ /// dictionary encoded binary and strings.
+ ///
+ /// # Example
+ /// ```
+ /// # use arrow_array::ListArray;
+ /// # use arrow_array::types::Int32Type;
+ /// # use arrow_array::builder::StringDictionaryBuilder;
+ /// let data = vec![
+ /// Some(vec![Some("foo"), Some("bar"), Some("baz")]),
+ /// None,
+ /// Some(vec![Some("bar"), None, Some("foo")]),
+ /// Some(vec![]),
+ /// ];
+ /// let list_array =
ListArray::from_nested_iter::<StringDictionaryBuilder<Int32Type>, _, _,
_>(data);
+ /// println!("{:?}", list_array);
+ /// ```
+ pub fn from_nested_iter<B, T, P, I>(iter: I) -> Self
Review Comment:
Implementing the `FromIter` trait would be another option, but that would be
less explicit and I think makes the generic parameters more difficult.
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