Trait ChunkCompareEq

pub trait ChunkCompareEq<Rhs> {
    type Item;

    // Required methods
    fn equal(&self, rhs: Rhs) -> Self::Item;
    fn equal_missing(&self, rhs: Rhs) -> Self::Item;
    fn not_equal(&self, rhs: Rhs) -> Self::Item;
    fn not_equal_missing(&self, rhs: Rhs) -> Self::Item;
}

Compare Series and ChunkedArray’s and get a boolean mask that can be used to filter rows.

Example

use polars_core::prelude::*;
fn filter_all_ones(df: &DataFrame) -> PolarsResult<DataFrame> {
    let mask = df
    .column("column_a")?
    .as_materialized_series()
    .equal(1)?;

    df.filter(&mask)
}

Required Associated Types

type Item

Required Methods

fn equal(&self, rhs: Rhs) -> Self::Item

Check for equality.

fn equal_missing(&self, rhs: Rhs) -> Self::Item

Check for equality where None == None.

fn not_equal(&self, rhs: Rhs) -> Self::Item

Check for inequality.

fn not_equal_missing(&self, rhs: Rhs) -> Self::Item

Check for inequality where None == None.

Implementors

impl ChunkCompareEq<&Column> for Column

type Item = Result<ChunkedArray<BooleanType>, PolarsError>

impl ChunkCompareEq<&str> for CategoricalChunked

Available on crate feature dtype-categorical only.

type Item = Result<ChunkedArray<BooleanType>, PolarsError>

impl ChunkCompareEq<&str> for Series

type Item = Result<ChunkedArray<BooleanType>, PolarsError>

impl ChunkCompareEq<&str> for StringChunked

type Item = ChunkedArray<BooleanType>

impl ChunkCompareEq<&CategoricalChunked> for CategoricalChunked

Available on crate feature dtype-categorical only.

type Item = Result<ChunkedArray<BooleanType>, PolarsError>

impl ChunkCompareEq<&Series> for Series

type Item = Result<ChunkedArray<BooleanType>, PolarsError>

impl ChunkCompareEq<&ChunkedArray<BinaryType>> for BinaryChunked

type Item = ChunkedArray<BooleanType>

impl ChunkCompareEq<&ChunkedArray<BooleanType>> for BooleanChunked

type Item = ChunkedArray<BooleanType>

impl ChunkCompareEq<&ChunkedArray<ListType>> for ListChunked

type Item = ChunkedArray<BooleanType>

impl ChunkCompareEq<&ChunkedArray<StringType>> for CategoricalChunked

Available on crate feature dtype-categorical only.

type Item = Result<ChunkedArray<BooleanType>, PolarsError>

impl ChunkCompareEq<&ChunkedArray<StringType>> for StringChunked

type Item = ChunkedArray<BooleanType>

impl ChunkCompareEq<&[u8]> for BinaryChunked

type Item = ChunkedArray<BooleanType>

impl<Rhs> ChunkCompareEq<Rhs> for Series

where Rhs: NumericNative,

type Item = Result<ChunkedArray<BooleanType>, PolarsError>

impl<T> ChunkCompareEq<&ChunkedArray<T>> for ChunkedArray<T>

where T: PolarsNumericType, T::Array: TotalOrdKernel<Scalar = T::Native> + TotalEqKernel<Scalar = T::Native>,

type Item = ChunkedArray<BooleanType>

impl<T, Rhs> ChunkCompareEq<Rhs> for ChunkedArray<T>

where T: PolarsNumericType, Rhs: ToPrimitive, T::Array: TotalOrdKernel<Scalar = T::Native> + TotalEqKernel<Scalar = T::Native>,

type Item = ChunkedArray<BooleanType>