Struct NullableFrame 

pub struct NullableFrame {
    pub columns: Vec<(String, NullCol)>,
}

A DataFrame-like frame that can hold nullable columns. Used as output of joins, pivots, and bind operations that may introduce nulls.

Fields

columns: Vec<(String, NullCol)>

Implementations

impl NullableFrame

pub fn new() -> Self

Create an empty NullableFrame with no columns.

pub fn nrows(&self) -> usize

Returns the number of rows.

pub fn ncols(&self) -> usize

Returns the number of columns.

pub fn column_names(&self) -> Vec<&str>

Returns column names in order.

pub fn get_column(&self, name: &str) -> Option<&NullCol>

Look up a nullable column by name.

pub fn to_dataframe_filled(&self) -> DataFrame

Convert to a regular DataFrame, filling nulls with type-appropriate values.

pub fn to_tidy_frame_filled(&self) -> TidyFrame

Convert to TidyFrame (filled), discarding null metadata.

pub fn to_tidy_view_filled(&self) -> TidyView

Convert to TidyView (filled), discarding null metadata.

Trait Implementations

impl Clone for NullableFrame

fn clone(&self) -> NullableFrame

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for NullableFrame

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

Formats the value using the given formatter.

impl Default for NullableFrame

fn default() -> Self

Returns the “default value” for a type.