如何在 Rust 中使用字符串或数字播种随机数生成器

Question

I need to seed the Random Number generator in Rust to get deterministic output.

I am using the following to generate a random number:

        let mut rng = rand::thread_rng();
        let mut random_number = rng.gen_range(0.0..1.0);

How do I seed this with

1. String; and a
2. Number

Answer 1

Use the rand_pcg crate with rand_pcg = "0.3.1" in your Cargo.toml :

use rand_pcg::Pcg32;
use rand::{Rng, SeedableRng, rngs::StdRng};
let mut rng = Pcg32::seed_from_u64(42);
    
let random_number: u32 = rng.gen_range(0..100);
println!("{}", random_number);