Struct Builder 

pub struct Builder { /* private fields */ }

Columns being filled, a row at a time.

Implementations

impl Builder

pub fn new(columns: &[(&str, Kind)]) -> Self

pub fn len(&self) -> usize

Rows held, not yet taken.

pub fn is_empty(&self) -> bool

pub fn add_column(&mut self, name: &str, kind: Kind) -> usize

A column added after rows were: null in each of them.

pub fn push(&mut self, row: impl IntoIterator<Item = Cell>)

One row, a cell per column in order. Missing cells are null; extra ones are dropped.

pub fn push_sparse(&mut self, cells: impl IntoIterator<Item = (usize, Cell)>)

One row given as the column each value goes to; every other column is null.

pub fn set_time(&mut self, column: usize, row: usize, ms: i64)

Set the time in column column of a row not yet taken. Used to date the rows read before the log said what day it is.

pub fn take(&mut self) -> PolarsResult<DataFrame>

The rows held, as a frame; the builder is left empty with the same columns.

Trait Implementations

impl Debug for Builder

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.