Struct DataFrameSchema 

pub struct DataFrameSchema {
    pub column_names: Vec<String>,
    pub name_to_index: HashMap<String, u32>,
}

Fields

column_names: Vec<String>

Column names in order (index = column index)

name_to_index: HashMap<String, u32>

Column name to index mapping for O(1) lookup

Implementations

impl DataFrameSchema

pub fn from_columns(columns: Vec<String>) -> Self

Create schema from column names (indices assigned in order)

pub fn get_index(&self, name: &str) -> Option<u32>

Get column index by name

pub fn get_name(&self, index: u32) -> Option<&str>

Get column name by index

pub fn len(&self) -> usize

Number of columns

pub fn is_empty(&self) -> bool

Check if schema is empty

Trait Implementations

impl Clone for DataFrameSchema

fn clone(&self) -> DataFrameSchema

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DataFrameSchema

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

Formats the value using the given formatter.

impl Default for DataFrameSchema

fn default() -> DataFrameSchema

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for DataFrameSchema

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for DataFrameSchema

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.