Enum linked_hash_map::Entry

pub enum Entry<'a, K: 'a, V: 'a, S: 'a = RandomState> {
    Occupied(OccupiedEntry<'a, K, V, S>),
    Vacant(VacantEntry<'a, K, V, S>),
}

A view into a single location in a map, which may be vacant or occupied.

Variants

Occupied(OccupiedEntry<'a, K, V, S>)

An occupied Entry.

Vacant(VacantEntry<'a, K, V, S>)

A vacant Entry.

Implementations

impl<'a, K: Hash + Eq, V, S: BuildHasher> Entry<'a, K, V, S>

pub fn key(&self) -> &K

Returns the entry key

Examples

use linked_hash_map::LinkedHashMap;

let mut map = LinkedHashMap::<String, u32>::new();

assert_eq!("hello", map.entry("hello".to_string()).key());

pub fn or_insert(self, default: V) -> &'a mut V

Ensures a value is in the entry by inserting the default if empty, and returns a mutable reference to the value in the entry.

pub fn or_insert_with<F: FnOnce() -> V>(self, default: F) -> &'a mut V

Ensures a value is in the entry by inserting the result of the default function if empty, and returns a mutable reference to the value in the entry.

pub fn and_modify<F>(self, f: F) -> Self where
    F: FnOnce(&mut V), 

Provides in-place mutable access to an occupied entry before any potential inserts into the map.

pub fn or_default(self) -> &'a mut V where
    V: Default, 

Ensures a value is in the entry by inserting the default value if empty, and returns a mutable reference to the value in the entry.