commit | fd5b806261bd9560b8b1f6cf27cfdf9dc038f448 | [log] [tgz] |
---|---|---|
author | William Orr <will@worrbase.com> | Sun Oct 30 16:48:31 2016 -0700 |
committer | William Orr <will@worrbase.com> | Sun Oct 30 16:54:35 2016 -0700 |
tree | 0d13034e3f289c33f0646a74f2506b5b12aca7c5 | |
parent | e19f9208299057610b8d9c2db0b1a60e418ce06e [diff] |
Add documentation about BSD rand sources
A Rust library for random number generators and other randomness functionality.
Add this to your Cargo.toml
:
[dependencies] rand = "0.3"
and this to your crate root:
extern crate rand;
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>())