Struct polars::prelude::BinaryChunkedBuilder

pub struct BinaryChunkedBuilder {
    pub capacity: usize,
    /* private fields */
}

Fields

capacity: usize

Implementations

impl BinaryChunkedBuilder

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

Create a new UtfChunkedBuilder

Arguments

• capacity - Number of string elements in the final array.
• bytes_capacity - Number of bytes needed to store the string values.

pub fn append_value<S>(&mut self, v: S)where S: AsRef<[u8]>,

Appends a value of type T into the builder

pub fn append_null(&mut self)

Appends a null slot into the builder

pub fn append_option<S>(&mut self, opt: Option<S>)where S: AsRef<[u8]>,

pub fn finish(self) -> ChunkedArray<BinaryType>