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::hash::{Hash, Hasher};
use std::collections::HashMap;

use fasthash::RandomState;
use fasthash::city::CityHash64;

let s = RandomState::<CityHash64>::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>

fn new() -> Self

Constructs a new RandomState that is initialized with random keys.

Trait Implementations

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.

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

fn default() -> Self

Returns the "default value" for a type.