Function unary_dict

fn unary_dict<K, F, T>(
    array: &DictionaryArray<K>,
    op: F,
) -> Result<ArrayRef, ArrowError>
where
    K: ArrowDictionaryKeyType + ArrowNumericType,
    T: ArrowPrimitiveType,
    F: Fn(T::Native) -> T::Native,

A helper function that applies an infallible unary function to a dictionary array with primitive value type.