# Enum collections::btree_map::Entry 1.0.0 [−] [src]

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

1.0.0

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

## Variants

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

A vacant Entry

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

An occupied Entry

## Methods

### `impl<'a, K: Ord, V> Entry<'a, K, V>`
[src]

#### `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.

#### `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.

#### `fn key(&self) -> &K`
1.10.0

Returns a reference to this entry's key.

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