Struct polars_core::prelude::CategoricalChunkedBuilder

pub struct CategoricalChunkedBuilder { /* private fields */ }

Available on crate feature dtype-categorical only.

Implementations

impl CategoricalChunkedBuilder

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

pub fn register_value(&mut self, s: &str) -> (u32, bool)

Registers a value to a categorical index without pushing it. Returns the index and if the value was new.

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

pub fn append_null(&mut self)

pub fn append(&mut self, opt_s: Option<&str>)

pub fn drain_iter_and_finish<'a, I>(self, i: I) -> CategoricalChunked

where I: IntoIterator<Item = Option<&'a str>>,

pub fn finish(self) -> CategoricalChunked