Struct indigo::sync::ConcurrentHashSet [−][src]
A concurrent hash set provided by the dashmap
crate.
DashSet is a thin wrapper around DashMap
using ()
as the value type. It uses
methods and types which are more convenient to work with on a set.
Implementations
impl<'a, K> DashSet<K, RandomState> where
K: 'a + Eq + Hash,
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K: 'a + Eq + Hash,
A concurrent hash set provided by the dashmap
crate.
pub fn new() -> DashSet<K, RandomState>
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Creates a new DashSet with a capacity of 0.
Examples
use dashmap::DashSet; let games = DashSet::new(); games.insert("Veloren");
pub fn with_capacity(capacity: usize) -> DashSet<K, RandomState>
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Creates a new DashMap with a specified starting capacity.
Examples
use dashmap::DashSet; let numbers = DashSet::with_capacity(2); numbers.insert(2); numbers.insert(8);
impl<'a, K, S> DashSet<K, S> where
K: 'a + Eq + Hash,
S: Clone + BuildHasher,
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K: 'a + Eq + Hash,
S: Clone + BuildHasher,
A concurrent hash set provided by the dashmap
crate.
pub fn with_hasher(hasher: S) -> DashSet<K, S>
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Creates a new DashMap with a capacity of 0 and the provided hasher.
Examples
use dashmap::DashSet; use std::collections::hash_map::RandomState; let s = RandomState::new(); let games = DashSet::with_hasher(s); games.insert("Veloren");
pub fn with_capacity_and_hasher(capacity: usize, hasher: S) -> DashSet<K, S>
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Creates a new DashMap with a specified starting capacity and hasher.
Examples
use dashmap::DashSet; use std::collections::hash_map::RandomState; let s = RandomState::new(); let numbers = DashSet::with_capacity_and_hasher(2, s); numbers.insert(2); numbers.insert(8);
pub fn hash_usize<T>(&self, item: &T) -> usize where
T: Hash,
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T: Hash,
Hash a given item to produce a usize. Uses the provided or default HashBuilder.
pub fn insert(&self, key: K) -> bool
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Inserts a key into the set. Returns true if the key was not already in the set.
Examples
use dashmap::DashSet; let set = DashSet::new(); set.insert("I am the key!");
pub fn remove<Q>(&self, key: &Q) -> Option<K> where
K: Borrow<Q>,
Q: Hash + Eq + ?Sized,
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K: Borrow<Q>,
Q: Hash + Eq + ?Sized,
Removes an entry from the map, returning the key if it existed in the map.
Examples
use dashmap::DashSet; let soccer_team = DashSet::new(); soccer_team.insert("Jack"); assert_eq!(soccer_team.remove("Jack").unwrap(), "Jack");
pub fn remove_if<Q>(&self, key: &Q, f: impl FnOnce(&K) -> bool) -> Option<K> where
K: Borrow<Q>,
Q: Hash + Eq + ?Sized,
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K: Borrow<Q>,
Q: Hash + Eq + ?Sized,
Removes an entry from the set, returning the key if the entry existed and the provided conditional function returned true.
use dashmap::DashSet; let soccer_team = DashSet::new(); soccer_team.insert("Sam"); soccer_team.remove_if("Sam", |player| player.starts_with("Ja")); assert!(soccer_team.contains("Sam"));
use dashmap::DashSet; let soccer_team = DashSet::new(); soccer_team.insert("Sam"); soccer_team.remove_if("Jacob", |player| player.starts_with("Ja")); assert!(!soccer_team.contains("Jacob"));
pub fn iter(&'a self) -> Iter<'a, K, S, DashMap<K, (), S>>ⓘ
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Creates an iterator over a DashMap yielding immutable references.
Examples
use dashmap::DashSet; let words = DashSet::new(); words.insert("hello"); assert_eq!(words.iter().count(), 1);
pub fn get<Q>(&'a self, key: &Q) -> Option<Ref<'a, K, S>> where
K: Borrow<Q>,
Q: Hash + Eq + ?Sized,
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K: Borrow<Q>,
Q: Hash + Eq + ?Sized,
Get a reference to an entry in the set
Examples
use dashmap::DashSet; let youtubers = DashSet::new(); youtubers.insert("Bosnian Bill"); assert_eq!(*youtubers.get("Bosnian Bill").unwrap(), "Bosnian Bill");
pub fn shrink_to_fit(&self)
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Remove excess capacity to reduce memory usage.
pub fn retain(&self, f: impl FnMut(&K) -> bool)
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Retain elements that whose predicates return true and discard elements whose predicates return false.
Examples
use dashmap::DashSet; let people = DashSet::new(); people.insert("Albin"); people.insert("Jones"); people.insert("Charlie"); people.retain(|name| name.contains('i')); assert_eq!(people.len(), 2);
pub fn len(&self) -> usize
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Fetches the total number of keys stored in the set.
Examples
use dashmap::DashSet; let people = DashSet::new(); people.insert("Albin"); people.insert("Jones"); people.insert("Charlie"); assert_eq!(people.len(), 3);
pub fn is_empty(&self) -> bool
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Checks if the set is empty or not.
Examples
use dashmap::DashSet; let map = DashSet::<()>::new(); assert!(map.is_empty());
pub fn clear(&self)
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Removes all keys in the set.
Examples
use dashmap::DashSet; let people = DashSet::new(); people.insert("Albin"); assert!(!people.is_empty()); people.clear(); assert!(people.is_empty());
pub fn capacity(&self) -> usize
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Returns how many keys the set can store without reallocating.
pub fn contains<Q>(&self, key: &Q) -> bool where
K: Borrow<Q>,
Q: Hash + Eq + ?Sized,
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K: Borrow<Q>,
Q: Hash + Eq + ?Sized,
Checks if the set contains a specific key.
Examples
use dashmap::DashSet; let people = DashSet::new(); people.insert("Dakota Cherries"); assert!(people.contains("Dakota Cherries"));
Trait Implementations
impl<K, S> Clone for DashSet<K, S> where
K: Clone + Eq + Hash,
S: Clone,
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K: Clone + Eq + Hash,
S: Clone,
impl<K, S> Debug for DashSet<K, S> where
K: Eq + Debug + Hash,
S: Clone + BuildHasher,
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K: Eq + Debug + Hash,
S: Clone + BuildHasher,
impl<K, S> Default for DashSet<K, S> where
K: Eq + Hash,
S: Default + BuildHasher + Clone,
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K: Eq + Hash,
S: Default + BuildHasher + Clone,
impl<K, S> Extend<K> for DashSet<K, S> where
K: Eq + Hash,
S: Clone + BuildHasher,
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K: Eq + Hash,
S: Clone + BuildHasher,
pub fn extend<T>(&mut self, iter: T) where
T: IntoIterator<Item = K>,
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T: IntoIterator<Item = K>,
pub fn extend_one(&mut self, item: A)
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pub fn extend_reserve(&mut self, additional: usize)
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impl<K> FromIterator<K> for DashSet<K, RandomState> where
K: Eq + Hash,
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K: Eq + Hash,
pub fn from_iter<I>(iter: I) -> DashSet<K, RandomState> where
I: IntoIterator<Item = K>,
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I: IntoIterator<Item = K>,
impl<'a, K, S> IntoIterator for DashSet<K, S> where
K: Eq + Hash,
S: Clone + BuildHasher,
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K: Eq + Hash,
S: Clone + BuildHasher,
type Item = K
The type of the elements being iterated over.
type IntoIter = OwningIter<K, S>
Which kind of iterator are we turning this into?
pub fn into_iter(self) -> <DashSet<K, S> as IntoIterator>::IntoIter
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Auto Trait Implementations
impl<K, S = RandomState> !RefUnwindSafe for DashSet<K, S>
impl<K, S> Send for DashSet<K, S> where
K: Send,
S: Send,
K: Send,
S: Send,
impl<K, S> Sync for DashSet<K, S> where
K: Send + Sync,
S: Send + Sync,
K: Send + Sync,
S: Send + Sync,
impl<K, S> Unpin for DashSet<K, S> where
S: Unpin,
S: Unpin,
impl<K, S> UnwindSafe for DashSet<K, S> where
K: UnwindSafe,
S: UnwindSafe,
K: UnwindSafe,
S: UnwindSafe,
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut Tⓘ
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> Same<T> for T
type Output = T
Should always be Self
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
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pub fn clone_into(&self, target: &mut T)
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impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<V, T> VZip<V> for T where
V: MultiLane<T>,
V: MultiLane<T>,