Trait ChunkApproxNUnique 

pub trait ChunkApproxNUnique {
    // Required method
    fn approx_n_unique(&self) -> u32;
}

Available on crate feature approx_unique only.

Required Methods

fn approx_n_unique(&self) -> u32

Implementors

impl<T> ChunkApproxNUnique for ChunkedArray<T>

where T: PolarsDataType, <T as PolarsDataType>::Physical<'a>: for<'a> TotalHash + for<'a> TotalEq + for<'a> Copy + for<'a> ToTotalOrd, <Option<<T as PolarsDataType>::Physical<'a>> as ToTotalOrd>::TotalOrdItem: for<'a> Hash + for<'a> Eq,