# Enum linked_hash_map::Entry

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

Expand description

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

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

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#### 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());

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#### 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.

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#### 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.

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#### 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.

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#### 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.

## Auto Trait Implementations

### impl<'a, K, V, S> RefUnwindSafe for Entry<'a, K, V, S> where
K: RefUnwindSafe,
S: RefUnwindSafe,
V: RefUnwindSafe,

### impl<'a, K, V, S = RandomState> !Send for Entry<'a, K, V, S>

### impl<'a, K, V, S = RandomState> !Sync for Entry<'a, K, V, S>

### impl<'a, K, V, S> Unpin for Entry<'a, K, V, S> where
K: Unpin,

### impl<'a, K, V, S = RandomState> !UnwindSafe for Entry<'a, K, V, S>

## Blanket Implementations

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### impl<T> Any for T where
T: 'static + ?Sized,

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more

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### impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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### impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

#### fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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### impl<T> From<T> for T

const: unstable · source

#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

#### fn into(self) -> U

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

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### impl<T, U> TryFrom<U> for T where
U: Into<T>,

#### type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

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### impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

#### type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.