Struct RandomSampler 

pub struct RandomSampler { /* private fields */ }

Random search: sample uniformly from each dimension.

Implementations

impl RandomSampler

pub fn new(n_trials: usize, seed: Option<u64>) -> Self

A random sampler producing n_trials configurations. None seed defaults to 42, keeping runs reproducible.

Trait Implementations

impl Sampler for RandomSampler

fn sample( &mut self, space: &SearchSpace, trial_index: usize, ) -> Result<Option<HashMap<String, Value>>>

Sample the next set of parameters. Returns None when exhausted.

fn n_trials(&self) -> Option<usize>

Total number of trials this sampler will produce (if known).

fn prepare(&mut self, _space: &SearchSpace)

Called once before the trial loop with the resolved search space. Lets samplers precompute state — e.g. GridSampler resolves its dimension grid here so n_trials is correct before the first sample.

fn record_result(&mut self, _params: &HashMap<String, Value>, _value: f64)

Feedback for a completed trial. value is normalized so that higher is always better (the runner negates for Minimize). Default: no-op (stateless samplers ignore feedback).