Struct DataTable 

pub struct DataTable { /* private fields */ }

A unified data table with named columns and metadata

Implementations

impl DataTable

pub fn new(source_format: DataFormat) -> Self

Create a new empty data table

pub fn add_column(&mut self, name: &str, data: DataColumn)

Add a column to the table

pub fn set_metadata(&mut self, key: &str, value: &str)

Add metadata

pub fn column_names(&self) -> &[String]

Get column names in order

pub fn column(&self, name: &str) -> Option<&DataColumn>

Get a column by name

pub fn column_by_index(&self, index: usize) -> Option<&DataColumn>

Get a column by index

pub fn num_columns(&self) -> usize

Number of columns

pub fn num_rows(&self) -> usize

Number of rows (from first column, or 0 if empty)

pub fn metadata(&self, key: &str) -> Option<&str>

Get metadata value

pub fn all_metadata(&self) -> &HashMap<String, String>

Get all metadata

pub fn source_format(&self) -> DataFormat

Source format

pub fn is_empty(&self) -> bool

Whether the table is empty

pub fn summary(&self) -> String

Get a summary of the table for display

pub fn select_columns(&self, names: &[&str]) -> Result<DataTable>

Select a subset of columns

pub fn slice_rows(&self, start: usize, end: usize) -> DataTable

Slice rows

Trait Implementations

impl Clone for DataTable

fn clone(&self) -> DataTable

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DataTable

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

Formats the value using the given formatter.