Struct rand::StdRng [] [src]

pub struct StdRng { /* fields omitted */ }

The standard RNG. This is designed to be efficient on the current platform.

Methods

impl StdRng
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Create a randomly seeded instance of StdRng.

This is a very expensive operation as it has to read randomness from the operating system and use this in an expensive seeding operation. If one is only generating a small number of random numbers, or doesn't need the utmost speed for generating each number, thread_rng and/or random may be more appropriate.

Reading the randomness from the OS may fail, and any error is propagated via the io::Result return value.

Trait Implementations

impl Copy for StdRng
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impl Clone for StdRng
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Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

impl Rng for StdRng
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Return the next random u32. Read more

Return the next random u64. Read more

Return the next random f32 selected from the half-open interval [0, 1). Read more

Return the next random f64 selected from the half-open interval [0, 1). Read more

Fill dest with random data. Read more

Return a random value of a Rand type. Read more

Return an iterator that will yield an infinite number of randomly generated items. Read more

Generate a random value in the range [low, high). Read more

Return a bool with a 1 in n chance of true Read more

Return an iterator of random characters from the set A-Z,a-z,0-9. Read more

Return a random element from values. Read more

Return a mutable pointer to a random element from values. Read more

Shuffle a mutable slice in place. Read more

impl<'a> SeedableRng<&'a [usize]> for StdRng
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Reseed an RNG with the given seed. Read more

Create a new RNG with the given seed. Read more