polars_core::export::cast

Function utf8_to_dictionary

pub fn utf8_to_dictionary<O, K>(
    from: &Utf8Array<O>,
) -> Result<DictionaryArray<K>, PolarsError>
where
    O: Offset,
    K: DictionaryKey,
Expand description

Cast [Utf8Array] to [DictionaryArray], also known as packing.

ยงErrors

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