Struct RecencyObjective 

pub struct RecencyObjective { /* private fields */ }

Scores by recency (newer = higher score).

Implementations

impl RecencyObjective

pub fn new(half_life_seconds: f64) -> Self

Create a new recency objective.

Panics

Panics if half_life_seconds is not positive and finite.

pub fn hours(hours: f64) -> Self

Create with hour half-life

pub fn days(days: f64) -> Self

Create with day half-life

Trait Implementations

impl<T: HasTimestamp + Send + Sync> Objective<T> for RecencyObjective

fn score(&self, candidate: &T, context: &ObjectiveContext) -> f64

Evaluate a single candidate.

fn name(&self) -> &str

Get the name of this objective.

fn precision(&self, _candidate: &T, _context: &ObjectiveContext) -> f64

Precision (inverse variance) estimate for the score of a candidate.

fn passes_score(&self, score: f64, context: &ObjectiveContext) -> bool

Check if a score passes the threshold.

fn passes(&self, candidate: &T, context: &ObjectiveContext) -> bool

Check if a candidate passes the threshold.

fn batch_score( &self, candidates: &[T], context: &ObjectiveContext, ) -> Vec<(usize, f64)>

Score a batch of candidates and return the passing (index, score) pairs.

fn select<'a>( &self, candidates: &'a [T], context: &ObjectiveContext, ) -> ObjectiveResult<Selection<&'a T>>

Select the best candidate from a list.

fn select_top<'a>( &self, candidates: &'a [T], n: usize, context: &ObjectiveContext, ) -> Vec<Selection<&'a T>>

Select the top N candidates.