alamb commented on code in PR #2297:
URL: https://github.com/apache/arrow-rs/pull/2297#discussion_r936635330
##########
arrow/src/array/array_dictionary.rs:
##########
@@ -385,6 +404,86 @@ impl<T: ArrowPrimitiveType> fmt::Debug for
DictionaryArray<T> {
}
}
+/// A strongly-typed wrapper around a [`DictionaryArray`] that implements
[`ArrayAccessor`]
+/// allowing fast access to its elements
+///
+/// ```
+/// use arrow::array::{ArrayIter, DictionaryArray, StringArray};
+/// use arrow::datatypes::Int32Type;
+///
+/// let orig = ["a", "b", "a", "b"];
+/// let dictionary = DictionaryArray::<Int32Type>::from_iter(orig);
+/// let typed = dictionary.downcast_dict::<StringArray>().unwrap();
Review Comment:
```suggestion
/// // `TypedDictionaryArray` allows you to access its values as strings
/// let typed = dictionary.downcast_dict::<StringArray>().unwrap();
```
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