Struct polars::export::arrow::array::NullArray

source · [−]

pub struct NullArray { /* private fields */ }

Expand description

The concrete Array of DataType::Null.

Implementations

impl NullArray

pub fn try_new(
data_type: DataType,
length: usize
) -> Result<NullArray, ArrowError>

Returns a new NullArray.

Errors

This function errors iff:

The data_type’s crate::datatypes::PhysicalType is not equal to crate::datatypes::PhysicalType::Null.

pub fn new(data_type: DataType, length: usize) -> NullArray

Returns a new NullArray.

Panics

This function errors iff:

The data_type’s crate::datatypes::PhysicalType is not equal to crate::datatypes::PhysicalType::Null.

pub fn from_data(data_type: DataType, length: usize) -> NullArray

Alias for new

pub fn new_empty(data_type: DataType) -> NullArray

Returns a new empty NullArray.

pub fn new_null(data_type: DataType, length: usize) -> NullArray

Returns a new NullArray.

impl NullArray

pub fn slice(&self, _offset: usize, length: usize) -> NullArray

Returns a slice of the NullArray.

Trait Implementations

impl Array for NullArray

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

Convert to trait object.

fn len(&self) -> usize

The length of the Array. Every array has a length corresponding to the number of elements (slots). Read more

fn data_type(&self) -> &DataType

The DataType of the Array. In combination with Array::as_any, this can be used to downcast trait objects (dyn Array) to concrete arrays. Read more

fn validity(&self) -> Option<&Bitmap>

The validity of the Array: every array has an optional Bitmap that, when available specifies whether the array slot is valid or not (null). When the validity is None, all slots are valid. Read more

fn slice(
    &self,
    offset: usize,
    length: usize
) -> Box<dyn Array + 'static, Global>

Slices the Array, returning a new Box<dyn Array>. Read more

unsafe fn slice_unchecked(
    &self,
    offset: usize,
    length: usize
) -> Box<dyn Array + 'static, Global>

Slices the Array, returning a new Box<dyn Array>. Read more

fn with_validity(&self, Option<Bitmap>) -> Box<dyn Array + 'static, Global>

Sets the validity bitmap on this Array. Read more

fn is_empty(&self) -> bool

whether the array is empty

fn null_count(&self) -> usize

The number of null slots on this Array. Read more

fn is_null(&self, i: usize) -> bool

Returns whether slot i is null. Read more

fn is_valid(&self, i: usize) -> bool

Returns whether slot i is valid. Read more

impl Clone for NullArray

fn clone(&self) -> NullArray

Returns a copy of the value. Read more

1.0.0 · source

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

impl Debug for NullArray

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more

impl From<GrowableNull> for NullArray

fn from(val: GrowableNull) -> NullArray

Performs the conversion.

impl<'_> PartialEq<&'_ (dyn Array + '_)> for NullArray

fn eq(&self, other: &&dyn Array) -> bool

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

1.0.0 · source

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

This method tests for !=.

impl PartialEq<NullArray> for NullArray

fn eq(&self, other: &NullArray) -> bool

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

1.0.0 · source

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

This method tests for !=.

Auto Trait Implementations

impl RefUnwindSafe for NullArray

impl Send for NullArray

impl Sync for NullArray

impl Unpin for NullArray

impl UnwindSafe for NullArray

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> Pointable for T

const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

impl<A> PolarsArray for A where
A: Array + ?Sized,

fn has_validity(&self) -> bool

impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<V, T> VZip<V> for T where
V: MultiLane<T>,

fn vzip(self) -> V