random_constructible/
sample.rs

1crate::ix!();
2
3pub fn sample_variants_with_probabilities<K: Clone + Eq + Hash + Sized, RNG: Rng + ?Sized>(rng: &mut RNG, probs: &HashMap<K,f64>) 
4-> K 
5{
6    let variants: Vec<_> = probs.keys().cloned().collect();
7    let weights:  Vec<_> = variants.iter().map(|v| probs[v]).collect();
8    let dist = rand::distributions::WeightedIndex::new(&weights).unwrap();
9    variants[dist.sample(rng)].clone()
10}