Struct GroupIndex 

pub struct GroupIndex {
    pub groups: Vec<GroupMeta>,
    pub key_names: Vec<String>,
}

Index over groups, in first-occurrence order.

Fields

groups: Vec<GroupMeta>

key_names: Vec<String>

Implementations

impl GroupIndex

pub fn build_fast_typed( base: &DataFrame, key_col_indices: &[usize], visible_rows: &[usize], key_names: Vec<String>, ) -> Self

Build group index using borrowed keys. Single-key fast path avoids Vec wrapper per row (100K fewer heap allocations).

Trait Implementations

impl Clone for GroupIndex

fn clone(&self) -> GroupIndex

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GroupIndex

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

Formats the value using the given formatter.