Trait polars::prelude::ChunkFilter

pub trait ChunkFilter<T>
where
    T: PolarsDataType,
{
    // Required method
    fn filter(
        &self,
        filter: &ChunkedArray<BooleanType>,
    ) -> Result<ChunkedArray<T>, PolarsError>
       where Self: Sized;
}

Filter values by a boolean mask.

Required Methods

fn filter( &self, filter: &ChunkedArray<BooleanType>, ) -> Result<ChunkedArray<T>, PolarsError>

where Self: Sized,

Filter values in the ChunkedArray with a boolean mask.

let array = Int32Chunked::new("array".into(), &[1, 2, 3]);
let mask = BooleanChunked::new("mask".into(), &[true, false, true]);

let filtered = array.filter(&mask).unwrap();
assert_eq!(Vec::from(&filtered), [Some(1), Some(3)])

Implementors

impl ChunkFilter<BinaryType> for ChunkedArray<BinaryType>

impl ChunkFilter<StringType> for ChunkedArray<StringType>

impl<T> ChunkFilter<ObjectType<T>> for ChunkedArray<ObjectType<T>>

where T: PolarsObject,

Available on crate feature object only.

impl<T> ChunkFilter<T> for ChunkedArray<T>

where T: PolarsDataType<HasViews = FalseT, IsObject = FalseT>,