Random Pick

Pick an element from a slice randomly by given weights.

Example

```rust extern crate random_pick;

enum Prize { Legendary, Rare, Enchanted, Common, }

let prize_list = [Prize::Legendary, Prize::Rare, Prize::Enchanted, Prize::Common]; // available prizes

let slice = &prize_list; let weights = [1, 5, 15, 30]; // a scale of chance of picking each kind of prize

let n = 1000000; let mut counter = [0usize; 4];

for _ in 0..n { let pickeditem = randompick::pickfromslice(slice, &weights).unwrap();

match picked_item {
    Prize::Legendary=>{
        counter[0] += 1;
       }
    Prize::Rare=>{
        counter[1] += 1;
    }
    Prize::Enchanted=>{
        counter[2] += 1;
    }
    Prize::Common=>{
        counter[3] += 1;
    }
}

}

println!("{}", counter[0]); // Should be close to 20000 println!("{}", counter[1]); // Should be close to 100000 println!("{}", counter[2]); // Should be close to 300000 println!("{}", counter[3]); // Should be close to 600000 ```

The length of the slice is usually an integral multiple (larger than zero) of that of weights.

Crates.io

https://crates.io/crates/random-pick

Documentation

https://docs.rs/random-pick

License

MIT