Struct polars_core::prelude::CategoricalChunkedBuilder

pub struct CategoricalChunkedBuilder<'a> { /* private fields */ }

Available on crate feature dtype-categorical only.

Implementations

impl CategoricalChunkedBuilder<'_>

pub fn new(name: &str, capacity: usize) -> Self

impl<'a> CategoricalChunkedBuilder<'a>

pub fn exits(&self, s: &str) -> bool

Check if this categorical already exists

pub fn append_value(&mut self, s: &'a str)

pub fn append_null(&mut self)

pub fn drain_iter<I>(&mut self, i: I)where
    I: IntoIterator<Item = Option<&'a str>>,

Appends all the values in a single lock of the global string cache.

pub fn finish(self) -> CategoricalChunked