Trait polars::prelude::ChunkFilter[][src]

pub trait ChunkFilter<T> {
    fn filter(
        &self,
        filter: &ChunkedArray<BooleanType>
    ) -> Result<ChunkedArray<T>, PolarsError>; }
Expand description

Filter values by a boolean mask.

Required methods

Filter values in the ChunkedArray with a boolean mask.

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

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

Implementors