commit | 52fbc32fd66024737b21e2305e865edc72c7c129 | [log] [tgz] |
---|---|---|
author | Alex Crichton <alex@alexcrichton.com> | Thu Dec 10 14:28:43 2015 -0500 |
committer | Alex Crichton <alex@alexcrichton.com> | Thu Dec 10 14:28:43 2015 -0500 |
tree | 3bb8f4fa3db55527b2c01eb5f8b05cb9406fd205 | |
parent | 8e06af206f4c58177cac35bba45e28f481faf466 [diff] | |
parent | 96aa0b2d75fd222f542be96576ff9c79686985fe [diff] |
Merge pull request #87 from chills42/patch-1 Expand the README to include some basic examples.
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>())