commit | e35c44ce9a1508c253441b3db1b14268d6dcbaeb | [log] [tgz] |
---|---|---|
author | Aleksey Kladov <aleksey.kladov@gmail.com> | Sat Mar 11 17:42:23 2017 +0300 |
committer | Aleksey Kladov <aleksey.kladov@gmail.com> | Sat Mar 11 17:47:42 2017 +0300 |
tree | 515dfb6f31cdcd20bf94770b3a251aa5612237f5 | |
parent | bb05039aa6dddafff90ec96f301121d1d947f272 [diff] |
Clarify reservoir sampling docs For example, `sample(r, b"ATGC", 4)` always returns `[b'A', b'T', b'G', b'C']`.
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>())