Function re_chunk::util::arrays_to_dictionary

pub fn arrays_to_dictionary<Idx: Copy + Eq>(
    array_datatype: &DataType,
    arrays: &[Option<(Idx, &dyn ArrowArray)>]
) -> Option<DictionaryArray<i32>>

Create a sparse dictionary-array out of an array of (potentially) duplicated arrays.

The Idx is used as primary key to drive the deduplication process. Returns None if any of the specified arrays doesn’t match the given array_datatype.

Returns an empty dictionary if arrays is empty.