polars::frame::group_by::aggregations

Function _agg_helper_slice

Source 
pub fn _agg_helper_slice<T, F>(groups: &[[u32; 2]], f: F) -> Series
where
    F: Fn([u32; 2]) -> Option<<T as PolarsNumericType>::Native> + Send + Sync,
    T: PolarsNumericType,
    ChunkedArray<T>: IntoSeries,
Available on crate feature algorithm_group_by only.