Struct DataFrameBuilder

pub struct DataFrameBuilder { /* private fields */ }

Implementations

impl DataFrameBuilder

pub fn new(schema: Arc<Schema<DataType>>) -> DataFrameBuilder

pub fn reserve(&mut self, additional: usize)

pub fn freeze(self) -> DataFrame

pub fn freeze_reset(&mut self) -> DataFrame

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn extend(&mut self, other: &DataFrame, share: ShareStrategy)

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

pub fn subslice_extend( &mut self, other: &DataFrame, start: usize, length: usize, share: ShareStrategy, )

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

pub unsafe fn gather_extend( &mut self, other: &DataFrame, idxs: &[u32], share: ShareStrategy, )

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

Safety

The indices must be in-bounds.

pub fn opt_gather_extend( &mut self, other: &DataFrame, idxs: &[u32], share: ShareStrategy, )

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