Struct fasthash::RandomState

pub struct RandomState<T: FastHash> { /* fields omitted */ }

RandomState provides the default state for HashMap or HashSet types.

A particular instance RandomState will create the same instances of Hasher, but the hashers created by two different RandomState instances are unlikely to produce the same result for the same values.

use std::collections::HashMap;

use fasthash::RandomState;
use fasthash::city::Hash64;

let s = RandomState::<Hash64>::new();
let mut map = HashMap::with_hasher(s);

assert_eq!(map.insert(37, "a"), None);
assert_eq!(map.is_empty(), false);

map.insert(37, "b");
assert_eq!(map.insert(37, "c"), Some("b"));
assert_eq!(map[&37], "c");

Methods

impl<T: FastHash> RandomState<T>

pub fn new() -> Self

Constructs a new RandomState that is initialized with random keys.

Trait Implementations

impl<T: FastHash> Default for RandomState<T>

fn default() -> Self

Returns the "default value" for a type.

impl<T: FastHash> BuildHasher for RandomState<T>

type Hasher = T::FastHasher

Type of the hasher that will be created.

fn build_hasher(&self) -> Self::Hasher

Creates a new hasher.