[−][src]Struct rayon_hash::hash_map::OccupiedEntry
A view into an occupied entry in a HashMap
.
It is part of the Entry
enum.
Methods
impl<'a, K, V> OccupiedEntry<'a, K, V>
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pub fn key(&self) -> &K
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Gets a reference to the key in the entry.
Examples
use rayon_hash::HashMap; let mut map: HashMap<&str, u32> = HashMap::new(); map.entry("poneyland").or_insert(12); assert_eq!(map.entry("poneyland").key(), &"poneyland");
pub fn remove_entry(self) -> (K, V)
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Take the ownership of the key and value from the map.
Examples
use rayon_hash::HashMap; use rayon_hash::hash_map::Entry; let mut map: HashMap<&str, u32> = HashMap::new(); map.entry("poneyland").or_insert(12); if let Entry::Occupied(o) = map.entry("poneyland") { // We delete the entry from the map. o.remove_entry(); } assert_eq!(map.contains_key("poneyland"), false);
pub fn get(&self) -> &V
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Gets a reference to the value in the entry.
Examples
use rayon_hash::HashMap; use rayon_hash::hash_map::Entry; let mut map: HashMap<&str, u32> = HashMap::new(); map.entry("poneyland").or_insert(12); if let Entry::Occupied(o) = map.entry("poneyland") { assert_eq!(o.get(), &12); }
pub fn get_mut(&mut self) -> &mut V
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Gets a mutable reference to the value in the entry.
If you need a reference to the OccupiedEntry
which may outlive the
destruction of the Entry
value, see into_mut
.
Examples
use rayon_hash::HashMap; use rayon_hash::hash_map::Entry; let mut map: HashMap<&str, u32> = HashMap::new(); map.entry("poneyland").or_insert(12); assert_eq!(map["poneyland"], 12); if let Entry::Occupied(mut o) = map.entry("poneyland") { *o.get_mut() += 10; assert_eq!(*o.get(), 22); // We can use the same Entry multiple times. *o.get_mut() += 2; } assert_eq!(map["poneyland"], 24);
pub fn into_mut(self) -> &'a mut V
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Converts the OccupiedEntry into a mutable reference to the value in the entry with a lifetime bound to the map itself.
If you need multiple references to the OccupiedEntry
, see get_mut
.
Examples
use rayon_hash::HashMap; use rayon_hash::hash_map::Entry; let mut map: HashMap<&str, u32> = HashMap::new(); map.entry("poneyland").or_insert(12); assert_eq!(map["poneyland"], 12); if let Entry::Occupied(o) = map.entry("poneyland") { *o.into_mut() += 10; } assert_eq!(map["poneyland"], 22);
pub fn insert(&mut self, value: V) -> V
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Sets the value of the entry, and returns the entry's old value.
Examples
use rayon_hash::HashMap; use rayon_hash::hash_map::Entry; let mut map: HashMap<&str, u32> = HashMap::new(); map.entry("poneyland").or_insert(12); if let Entry::Occupied(mut o) = map.entry("poneyland") { assert_eq!(o.insert(15), 12); } assert_eq!(map["poneyland"], 15);
pub fn remove(self) -> V
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Takes the value out of the entry, and returns it.
Examples
use rayon_hash::HashMap; use rayon_hash::hash_map::Entry; let mut map: HashMap<&str, u32> = HashMap::new(); map.entry("poneyland").or_insert(12); if let Entry::Occupied(o) = map.entry("poneyland") { assert_eq!(o.remove(), 12); } assert_eq!(map.contains_key("poneyland"), false);
Trait Implementations
impl<'a, K: 'a + Send, V: 'a + Send> Send for OccupiedEntry<'a, K, V>
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impl<'a, K: 'a + Sync, V: 'a + Sync> Sync for OccupiedEntry<'a, K, V>
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impl<K: Debug, V: Debug, '_> Debug for OccupiedEntry<'_, K, V>
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Blanket Implementations
impl<T, U> Into for T where
U: From<T>,
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U: From<T>,
impl<T> From for T
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impl<T, U> TryFrom 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.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T> Borrow for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> BorrowMut for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T, U> TryInto for T where
U: TryFrom<T>,
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U: TryFrom<T>,