Trait polars::export::arrow::scalar::Scalar

pub trait Scalar: Debug + Send + Sync {
    fn as_any(&self) -> &(dyn Any + 'static);
    fn is_valid(&self) -> bool;
    fn data_type(&self) -> &DataType;
}

Trait object declaring an optional value with a DataType. This strait is often used in APIs that accept multiple scalar types.

Required methods

fn as_any(&self) -> &(dyn Any + 'static)

convert itself to

fn is_valid(&self) -> bool

whether it is valid

fn data_type(&self) -> &DataType

the logical type.

Trait Implementations

impl<'_> PartialEq<dyn Scalar + '_> for dyn Scalar + '_

fn eq(&self, that: &dyn Scalar) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl<'_> PartialEq<dyn Scalar + 'static> for Arc<dyn Scalar + '_>

fn eq(&self, that: &dyn Scalar) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

Implementors

impl Scalar for BooleanScalar

impl Scalar for FixedSizeBinaryScalar

impl Scalar for FixedSizeListScalar

impl Scalar for NullScalar

impl Scalar for StructScalar

impl<K> Scalar for DictionaryScalar<K> where
    K: DictionaryKey, 

impl<O> Scalar for BinaryScalar<O> where
    O: Offset, 

impl<O> Scalar for ListScalar<O> where
    O: Offset, 

impl<O> Scalar for Utf8Scalar<O> where
    O: Offset, 

impl<T> Scalar for PrimitiveScalar<T> where
    T: NativeType,