Struct near_sdk::store::lookup_map::OccupiedEntry
source · pub struct OccupiedEntry<'a, K, V> { /* private fields */ }
Implementations
sourceimpl<'a, K, V> OccupiedEntry<'a, K, V>
impl<'a, K, V> OccupiedEntry<'a, K, V>
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 near_sdk::store::LookupMap;
use near_sdk::store::lookup_map::Entry;
let mut map: LookupMap<String, u32> = LookupMap::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::LookupMap;
use near_sdk::store::lookup_map::Entry;
let mut map: LookupMap<String, u32> = LookupMap::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::LookupMap;
use near_sdk::store::lookup_map::Entry;
let mut map: LookupMap<String, u32> = LookupMap::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::LookupMap;
use near_sdk::store::lookup_map::Entry;
let mut map: LookupMap<String, u32> = LookupMap::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::LookupMap;
use near_sdk::store::lookup_map::Entry;
let mut map: LookupMap<String, u32> = LookupMap::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) -> V
pub fn remove(self) -> V
Takes the value out of the entry, and returns it.
Examples
use near_sdk::store::LookupMap;
use near_sdk::store::lookup_map::Entry;
let mut map: LookupMap<String, u32> = LookupMap::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> RefUnwindSafe for OccupiedEntry<'a, K, V>where
K: RefUnwindSafe,
V: RefUnwindSafe,
impl<'a, K, V> Send for OccupiedEntry<'a, K, V>where
K: Send,
V: Send,
impl<'a, K, V> Sync for OccupiedEntry<'a, K, V>where
K: Sync,
V: Sync,
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
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more