pub struct OccupiedEntry<'a, K: 'a, V: 'a> { /* private fields */ }Expand description
A view into an occupied entry in a HashMap.
It is part of the Entry enum.
Implementations§
source§impl<'a, K, V> OccupiedEntry<'a, K, V>
 
impl<'a, K, V> OccupiedEntry<'a, K, V>
1.12.0 · sourcepub fn remove_entry(self) -> (K, V)
 
pub fn remove_entry(self) -> (K, V)
Take the ownership of the key and value from the map.
§Examples
use std::collections::HashMap;
use std::collections::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);1.0.0 · sourcepub fn get_mut(&mut self) -> &mut V
 
pub fn get_mut(&mut self) -> &mut V
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 std::collections::HashMap;
use std::collections::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);1.0.0 · sourcepub fn into_mut(self) -> &'a mut V
 
pub fn into_mut(self) -> &'a mut V
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 std::collections::HashMap;
use std::collections::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);1.0.0 · sourcepub fn insert(&mut self, value: V) -> V
 
pub fn insert(&mut self, value: V) -> V
Sets the value of the entry, and returns the entry’s old value.
§Examples
Trait Implementations§
Auto Trait Implementations§
impl<'a, K, V> Freeze for OccupiedEntry<'a, K, V>
impl<'a, K, V> RefUnwindSafe for OccupiedEntry<'a, K, V>where
    K: RefUnwindSafe,
    V: RefUnwindSafe,
impl<'a, K, V> Send for OccupiedEntry<'a, K, V>
impl<'a, K, V> Sync for OccupiedEntry<'a, K, V>
impl<'a, K, V> Unpin for OccupiedEntry<'a, K, V>
impl<'a, K, V> !UnwindSafe for OccupiedEntry<'a, K, V>
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
    T: ?Sized,
 
impl<T> BorrowMut<T> for Twhere
    T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
 
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more