New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

RFC: choose_weighted #253

Closed

Dowwie opened this issue Feb 5, 2018 · 1 comment

Dowwie commented Feb 5, 2018

Would you like to add a choose_weighted function to the library?

fn choose_weighted<'a, T>(&mut self, values: &'a [T], weights: &[f32]) -> Option<&'a T> where
    Self: Sized, 
[−]

Return a weighted-random element from values.

Return None if values is empty.
Example

use rand::{thread_rng, Rng};

let choices = [20, 30, 40, 10];
let weights = [.60, 20, 15, 5]; 
let mut rng = thread_rng();
println!("{:?}", rng.choose_weighted(&choices, &weights));

Member

dhardy commented Feb 6, 2018

We already have WeightedChoice which does roughly this, though I'm tempted to remove the items ("choices") themselves and just return an index.

See also dhardy#82

Dowwie closed this as completed

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment