commit | c0be11ad2df5589f1dc6c84745c9887f88035351 | [log] [tgz] |
---|---|---|
author | Tim Neumann <mail@timnn.me> | Sun Feb 26 11:05:40 2017 +0100 |
committer | Tim Neumann <mail@timnn.me> | Sun Feb 26 11:05:40 2017 +0100 |
tree | 79105f4b57a7bbe4bec7368f2cf5b5abb70b1481 | |
parent | 4031f80ebf604cf37892cb59037ddf631dd29a8f [diff] |
build with nightly features on travis
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>())