Trait vrp_core::utils::Random

pub trait Random {
    fn get_rng(&self) -> StdRng;

    fn uniform_int(&self, min: i32, max: i32) -> i32 { ... }
    fn uniform_real(&self, min: f64, max: f64) -> f64 { ... }
    fn is_head_not_tails(&self) -> bool { ... }
    fn is_hit(&self, probability: f64) -> bool { ... }
    fn weighted(&self, weights: &[usize]) -> usize { ... }
}

Provides the way to use randomized values in generic way.

Required methods

fn get_rng(&self) -> StdRng

Returns RNG.

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Provided methods

fn uniform_int(&self, min: i32, max: i32) -> i32

Produces integral random value, uniformly distributed on the closed interval [min, max]

fn uniform_real(&self, min: f64, max: f64) -> f64

Produces real random value, uniformly distributed on the closed interval [min, max)

fn is_head_not_tails(&self) -> bool

Flips a coin and returns true if it is “heads”, false otherwise.

fn is_hit(&self, probability: f64) -> bool

Tests probability value in (0., 1.) range.

fn weighted(&self, weights: &[usize]) -> usize

Returns an index from collected with probability weight. Uses exponential distribution where the weights are the rate of the distribution (lambda) and selects the smallest sampled value.

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Implementors

impl Random for DefaultRandom

fn get_rng(&self) -> StdRng

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