Struct polars_arrow::builder::PrimitiveArrayBuilder

pub struct PrimitiveArrayBuilder<T> where
    T: ArrowPrimitiveType,
    T::Native: Default,  { /* fields omitted */ }

An arrow primitive builder that is faster than Arrow’s native builder because it uses Rust Vec’s as buffer

Implementations

impl<T> PrimitiveArrayBuilder<T> where
    T: ArrowPrimitiveType,
    T::Native: Default, 

pub fn new(capacity: usize) -> Self

pub fn new_no_nulls(capacity: usize) -> Self

pub fn append_value(&mut self, v: T::Native)

Appends a value of type T::Native into the builder

pub fn append_slice(&mut self, other: &[T::Native])

pub fn append_null(&mut self)

Appends a null slot into the builder

pub fn shrink_to_fit(&mut self)

pub fn finish_with_null_buffer(&mut self, buffer: Buffer) -> PrimitiveArray<T>

pub fn finish(&mut self) -> PrimitiveArray<T>

Build the array and reset this Builder

Trait Implementations

impl<T> ArrayBuilder for PrimitiveArrayBuilder<T> where
    T: ArrowPrimitiveType, 

fn len(&self) -> usize

Returns the number of array slots in the builder

fn is_empty(&self) -> bool

Returns whether number of array slots is zero

fn finish(&mut self) -> ArrayRef

Builds the array

fn as_any(&self) -> &dyn Any

Returns the builder as a non-mutable Any reference.

fn as_any_mut(&mut self) -> &mut dyn Any

Returns the builder as a mutable Any reference.

fn into_box_any(self: Box<Self>) -> Box<dyn Any>

Returns the boxed builder as a box of Any.