Struct scale_info::prelude::hash::RandomState

1.7.0 · source ·
pub struct RandomState { /* private fields */ }
Expand description

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::hash::RandomState;

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

Implementations§

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impl RandomState

1.7.0 · source

pub fn new() -> RandomState

Constructs a new RandomState that is initialized with random keys.

§Examples
use std::hash::RandomState;

let s = RandomState::new();

Trait Implementations§

1.7.0 · source§

impl BuildHasher for RandomState

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type Hasher = DefaultHasher

Type of the hasher that will be created.
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fn build_hasher(&self) -> DefaultHasher

Creates a new hasher. Read more
1.71.0 · source§

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

Calculates the hash of a single value. Read more
1.7.0 · source§

impl Clone for RandomState

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fn clone(&self) -> RandomState

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
1.16.0 · source§

impl Debug for RandomState

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

Formats the value using the given formatter. Read more
1.7.0 · source§

impl Default for RandomState

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fn default() -> RandomState

Constructs a new RandomState.

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impl<T> Any for T
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fn type_id(&self) -> TypeId

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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fn conv<T>(self) -> T
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Converts self into T using Into<T>. Read more
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impl<T> FmtForward for T

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fn fmt_binary(self) -> FmtBinary<Self>
where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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fn fmt_display(self) -> FmtDisplay<Self>
where Self: Display,

Causes self to use its Display implementation when Debug-formatted.
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where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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where Self: Pointer,

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fn fmt_upper_exp(self) -> FmtUpperExp<Self>
where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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fn into(self) -> U

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fn tap(self, func: impl FnOnce(&Self)) -> Self

Immutable access to a value. Read more
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