Struct std::collections::hash_map::RandomState

pub struct RandomState { /* fields omitted */ }

RandomState is the default state for HashMap 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.

Examples

use std::collections::HashMap;
use std::collections::hash_map::RandomState;

let s = RandomState::new();
let mut map = HashMap::with_hasher(s);
map.insert(1, 2);

Implementations

impl RandomState

pub fn new() -> RandomState

Constructs a new RandomState that is initialized with random keys.

Examples

use std::collections::hash_map::RandomState;

let s = RandomState::new();

Trait Implementations

impl BuildHasher for RandomState

type Hasher = DefaultHasher

Type of the hasher that will be created.

fn build_hasher(&self) -> DefaultHasher

Creates a new hasher.

fn hash_one<T>(&self, x: T) -> u64 where
    T: Hash, 

🔬 This is a nightly-only experimental API. (build_hasher_simple_hash_one #86161)

Calculates the hash of a single value.

impl Clone for RandomState

fn clone(&self) -> RandomState

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RandomState

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for RandomState

fn default() -> RandomState

Constructs a new RandomState.