Struct vrp_core::utils::DefaultRandom

pub struct DefaultRandom { /* private fields */ }

A default random implementation.

Implementations

impl DefaultRandom

pub fn new_with_seed(seed: u64) -> DefaultRandom

Creates a new instance DefaultRandom with seed.

Trait Implementations

impl Default for DefaultRandom

pub fn default() -> DefaultRandom

Returns the “default value” for a type.

impl Random for DefaultRandom

pub fn get_rng(&self) -> StdRng

Returns RNG.

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.