Crates.io | random-number |
lib.rs | random-number |
version | 0.1.8 |
source | src |
created_at | 2020-06-10 01:36:14.895884 |
updated_at | 2022-11-03 03:22:27.803449 |
description | Generate random numbers quickly. |
homepage | https://magiclen.org/random-number |
repository | https://github.com/magiclen/random-number |
max_upload_size | |
id | 252164 |
size | 29,390 |
Generate random numbers quickly.
random!
Marcouse random_number::random;
let n: u8 = random!();
println!("{}", n); // 0 ~ 255
let n: f64 = random!();
println!("{}", n); // 0.0 ~ 1.0
let n: u8 = random!(..=10);
println!("{}", n); // 0 ~ 10
let n: u8 = random!(..=9);
println!("{}", n); // 0 ~ 9
let n: u8 = random!(10..);
println!("{}", n); // 10 ~ 255
let n: i8 = random!(-2..=12);
println!("{}", n); // -2 ~ 12
let n: u8 = random!(12, 20);
println!("{}", n); // 12 ~ 20
let n: u8 = random!(20, 12);
println!("{}", n); // 12 ~ 20
The random number generator can be reused by adding it to the random!
macro as the last argument.
use random_number::random;
let mut rng = random_number::rand::thread_rng();
let n: u8 = random!(rng);
println!("{}", n); // 0 ~ 255
let n: u8 = random!(..=10, rng);
println!("{}", n); // 0 ~ 10
let n: u8 = random!(20, 12, rng);
println!("{}", n); // 12 ~ 20
random_ranged
FunctionIf the range is not literal, for example, a variable, var_range
, storing an instance that implements the RangeBounds
trait, the var_range
variable cannot be used in the random!
macro.
let var_range = 1..=10;
let n: u8 = random_number::random!(var_range); // compile error
In this case, use the random_ranged
function instead.
let var_range = 1..=10;
let n: u8 = random_number::random_ranged(var_range);
println!("{}", n); // 1 ~ 10
random_fill!
MarcoThe random_fill!
marco can be used to fill a slice with random numbers. The usage is like the random!
macro. Just add a slice as the first argument when using the random_fill!
macro.
let mut a = [0i8; 32];
random_number::random_fill!(a, -2..=12);
println!("{:?}", a);
random_fill_ranged
Functionlet var_range = 1..=10;
let mut a = [0u8; 32];
random_number::random_fill_ranged(&mut a, var_range);
println!("{:?}", a);
https://crates.io/crates/random-number