Struct ObjectChunkedBuilder

pub struct ObjectChunkedBuilder<T> { /* private fields */ }

Available on crate feature object only.

Implementations

impl<T> ObjectChunkedBuilder<T>

where T: PolarsObject,

pub fn field(&self) -> &Field

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

pub fn append_value(&mut self, v: T)

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_value_from_any(&mut self, v: &dyn Any) -> PolarsResult<()>

pub fn append_option(&mut self, opt: Option<T>)

pub fn finish(self) -> ObjectChunked<T>

Trait Implementations

impl<T: PolarsObject> AnonymousObjectBuilder for ObjectChunkedBuilder<T>

unsafe fn from_chunks(self: Box<Self>, chunks: Vec<ArrayRef>) -> Series

Safety

Expects ObjectArray<T> arrays.

fn as_array_builder(self: Box<Self>) -> Box<dyn ArrayBuilder>

fn append_null(&mut self)

Append a null value.

fn append_value(&mut self, value: &dyn Any)

Append a T of ObjectChunked<T> made generic via the Any trait.

fn to_series(&mut self) -> Series

Take the current state and materialize as a Series the builder should not be used after that.

fn get_list_builder( &self, name: PlSmallStr, values_capacity: usize, list_capacity: usize, ) -> Box<dyn ListBuilderTrait>

fn append_option(&mut self, value: Option<&dyn Any>)

impl<T: PolarsObject> ArrayBuilder for ObjectChunkedBuilder<T>

fn dtype(&self) -> &ArrowDataType

fn reserve(&mut self, additional: usize)

fn freeze(self) -> Box<dyn Array>

Consume this builder returning the built array.

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

Return the built array and reset to an empty state.

fn len(&self) -> usize

Returns the length of this builder (so far).

fn extend_nulls(&mut self, length: usize)

Extend this builder with the given number of null elements.

fn subslice_extend( &mut self, other: &dyn Array, start: usize, length: usize, _share: ShareStrategy, )

Extends this builder with the contents of the given array subslice. May panic if other does not match the dtype of this array.

fn subslice_extend_repeated( &mut self, other: &dyn Array, start: usize, length: usize, repeats: usize, share: ShareStrategy, )

The same as subslice_extend, but repeats the extension repeats times.

unsafe fn gather_extend( &mut self, other: &dyn Array, idxs: &[IdxSize], _share: ShareStrategy, )

Extends this builder with the contents of the given array at the given indices. That is, other[idxs[i]] is appended to this array in order, for each i=0..idxs.len(). May panic if other does not match the dtype of this array.

fn opt_gather_extend( &mut self, other: &dyn Array, idxs: &[IdxSize], _share: ShareStrategy, )

Extends this builder with the contents of the given array at the given indices. That is, other[idxs[i]] is appended to this array in order, for each i=0..idxs.len(). May panic if other does not match the dtype of this array. Out-of-bounds indices are mapped to nulls.

fn extend(&mut self, other: &(dyn Array + 'static), share: ShareStrategy)

Extends this builder with the contents of the given array. May panic if other does not match the dtype of this array.

impl<T> Default for ObjectChunkedBuilder<T>

where T: PolarsObject,

fn default() -> Self

Returns the “default value” for a type.