Struct near_sdk::store::unordered_map::OccupiedEntry
source · pub struct OccupiedEntry<'a, K, V>where
K: BorshSerialize,{ /* private fields */ }
Expand description
View into an occupied entry in a UnorderedMap
.
This is part of the Entry
enum.
Implementations§
source§impl<'a, K, V> OccupiedEntry<'a, K, V>where
K: BorshSerialize,
impl<'a, K, V> OccupiedEntry<'a, K, V>where
K: BorshSerialize,
sourcepub fn remove_entry(self) -> (K, V)where
K: BorshDeserialize,
pub fn remove_entry(self) -> (K, V)where
K: BorshDeserialize,
Take the ownership of the key and value from the map.
§Examples
use near_sdk::store::UnorderedMap;
use near_sdk::store::unordered_map::Entry;
let mut map: UnorderedMap<String, u32> = UnorderedMap::new(b"m");
map.entry("poneyland".to_string()).or_insert(12);
if let Entry::Occupied(o) = map.entry("poneyland".to_string()) {
// We delete the entry from the map.
o.remove_entry();
}
assert_eq!(map.contains_key("poneyland"), false);
sourcepub fn get(&self) -> &V
pub fn get(&self) -> &V
Gets a reference to the value in the entry.
§Examples
use near_sdk::store::UnorderedMap;
use near_sdk::store::unordered_map::Entry;
let mut map: UnorderedMap<String, u32> = UnorderedMap::new(b"m");
map.entry("poneyland".to_string()).or_insert(12);
if let Entry::Occupied(o) = map.entry("poneyland".to_string()) {
assert_eq!(o.get(), &12);
}
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 near_sdk::store::UnorderedMap;
use near_sdk::store::unordered_map::Entry;
let mut map: UnorderedMap<String, u32> = UnorderedMap::new(b"m");
map.entry("poneyland".to_string()).or_insert(12);
assert_eq!(map["poneyland"], 12);
if let Entry::Occupied(mut o) = map.entry("poneyland".to_string()) {
*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);
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 near_sdk::store::UnorderedMap;
use near_sdk::store::unordered_map::Entry;
let mut map: UnorderedMap<String, u32> = UnorderedMap::new(b"m");
map.entry("poneyland".to_string()).or_insert(12);
assert_eq!(map["poneyland"], 12);
if let Entry::Occupied(o) = map.entry("poneyland".to_string()) {
*o.into_mut() += 10;
}
assert_eq!(map["poneyland"], 22);
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
use near_sdk::store::UnorderedMap;
use near_sdk::store::unordered_map::Entry;
let mut map: UnorderedMap<String, u32> = UnorderedMap::new(b"m");
map.entry("poneyland".to_string()).or_insert(12);
if let Entry::Occupied(mut o) = map.entry("poneyland".to_string()) {
assert_eq!(o.insert(15), 12);
}
assert_eq!(map["poneyland"], 15);
sourcepub fn remove(self) -> Vwhere
K: BorshDeserialize,
pub fn remove(self) -> Vwhere
K: BorshDeserialize,
Takes the value out of the entry, and returns it.
§Examples
use near_sdk::store::UnorderedMap;
use near_sdk::store::unordered_map::Entry;
let mut map: UnorderedMap<String, u32> = UnorderedMap::new(b"m");
map.entry("poneyland".to_string()).or_insert(12);
if let Entry::Occupied(o) = map.entry("poneyland".to_string()) {
assert_eq!(o.remove(), 12);
}
assert_eq!(map.contains_key("poneyland"), false);
Auto Trait Implementations§
impl<'a, K, V> Freeze for OccupiedEntry<'a, K, V>where
K: Freeze,
impl<'a, K, V> !RefUnwindSafe for OccupiedEntry<'a, K, V>
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>where
K: Unpin,
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