Bump to 0.3.14
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tree: 1e2748d36195842c190e3e63bf24babdf21fabf0
  1. .gitignore
  2. .travis.yml
  3. Cargo.toml
  4. LICENSE-APACHE
  5. LICENSE-MIT
  6. README.md
  7. appveyor.yml
  8. benches/
  9. rand_macros/
  10. src/
README.md

rand

A Rust library for random number generators and other randomness functionality.

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Documentation

Usage

Add this to your Cargo.toml:

[dependencies]
rand = "0.3"

and this to your crate root:

extern crate rand;

Examples

There is built-in support for a random number generator (RNG) associated with each thread stored in thread-local storage. This RNG can be accessed via thread_rng, or used implicitly via random. This RNG is normally randomly seeded from an operating-system source of randomness, e.g. /dev/urandom on Unix systems, and will automatically reseed itself from this source after generating 32 KiB of random data.

let tuple = rand::random::<(f64, char)>();
println!("{:?}", tuple)
use rand::Rng;

let mut rng = rand::thread_rng();
if rng.gen() { // random bool
    println!("i32: {}, u32: {}", rng.gen::<i32>(), rng.gen::<u32>())
}

It is also possible to use other RNG types, which have a similar interface. The following uses the “ChaCha” algorithm instead of the default.

use rand::{Rng, ChaChaRng};

let mut rng = rand::ChaChaRng::new_unseeded();
println!("i32: {}, u32: {}", rng.gen::<i32>(), rng.gen::<u32>())