Struct polars::export::arrow::array::growable::GrowableDictionary

pub struct GrowableDictionary<'a, K> where
    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> GrowableDictionary<'a, T> where
    T: DictionaryKey, 

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

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

Panics

If arrays is empty.

Trait Implementations

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

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

Performs the conversion.

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

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 extend_validity(&mut self, additional: usize)

Extends this Growable with null elements, disregarding the bound arrays

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

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 + 'static, Global>

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