Struct polars_arrow::array::growable::GrowableDictionary

pub struct GrowableDictionary<'a, K: DictionaryKey> { /* private fields */ }

Concrete Growable for the DictionaryArray.

Implementation

This growable does not perform collision checks and instead concatenates the values of each DictionaryArray one after the other.

Implementations

impl<'a, T: DictionaryKey> GrowableDictionary<'a, T>

pub fn new( arrays: &[&'a DictionaryArray<T>], use_validity: bool, capacity: usize, ) -> Self

Creates a new GrowableDictionary bound to arrays with a pre-allocated capacity.

Panics

If arrays is empty.

Trait Implementations

impl<'a, T: DictionaryKey> From<GrowableDictionary<'a, T>> for DictionaryArray<T>

fn from(val: GrowableDictionary<'a, T>) -> Self

Converts to this type from the input type.

impl<'a, T: DictionaryKey> Growable<'a> for GrowableDictionary<'a, T>

unsafe fn extend(&mut self, index: usize, start: usize, len: usize)

Extends this Growable with elements from the bounded Array at index index from a slice starting at start and length len.

fn len(&self) -> usize

The current length of the Growable.

fn extend_validity(&mut self, additional: usize)

Extends this Growable with null elements, disregarding the bound arrays

fn as_arc(&mut self) -> Arc<dyn Array>

Converts this Growable to an Arc<dyn Array>, thereby finishing the mutation. Self will be empty after such operation.

fn as_box(&mut self) -> Box<dyn Array>

Converts this Growable to an Box<dyn Array>, thereby finishing the mutation. Self will be empty after such operation

unsafe fn extend_copies( &mut self, index: usize, start: usize, len: usize, copies: usize, )

Same as extend, except it repeats the extension copies times.