commit | 35c48a8233dd8cd55f5ff790e0359c4b38788780 | [log] [tgz] |
---|---|---|
author | Martin Matusiak <numerodix@gmail.com> | Tue Jan 05 22:48:30 2016 +0100 |
committer | Martin Matusiak <numerodix@gmail.com> | Tue Jan 05 22:48:30 2016 +0100 |
tree | d158982637d04cec7b44d5d5c899082a9cc1d7ad | |
parent | 9a668dea286784e85de805d3d9846424749f68f1 [diff] |
the literals are usize no u64
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>())