Function polars::export::arrow::compute::cast::primitive_to_dictionary

pub fn primitive_to_dictionary<T, K>(
    from: &PrimitiveArray<T>
) -> Result<DictionaryArray<K>, ArrowError> where
    T: NativeType + Eq + Hash,
    K: DictionaryKey, 

This is supported on crate feature compute_cast only.

Cast PrimitiveArray to DictionaryArray. Also known as packing.

Errors

This function errors if the maximum key is smaller than the number of distinct elements in the array.