Struct ExponentialRecency 

pub struct ExponentialRecency {
    pub half_life_ms: Millis,
    pub basis: RecencyBasis,
    pub floor: f64,
}

0.5^(age / half_life), never below floor. Facts without a time, and facts newer than the evaluation time, are not decayed.

Fields

half_life_ms: Millis

basis: RecencyBasis

floor: f64

Trait Implementations

impl Clone for ExponentialRecency

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ExponentialRecency

impl Debug for ExponentialRecency

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

Formats the value using the given formatter.

impl PartialEq for ExponentialRecency

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl RecencyPolicy for ExponentialRecency

fn factor(&self, fact: &RecencyContext) -> f64

A finite, nonnegative multiplier.

fn is_identity(&self) -> bool

True when the policy never changes a score; recall then skips it and keeps the document search order.

impl StructuralPartialEq for ExponentialRecency