KtMutableMap<K, V> class Null safety

A modifiable collection that holds pairs of objects (keys and values) and supports efficiently retrieving the value corresponding to each key. Map keys are unique; the map holds only one value for each key. @param K the type of map keys. The map is invariant on its key type. @param V the type of map values. The mutable map is invariant on its value type.

Implemented types
Implementers
Available Extensions

Constructors

KtMutableMap.empty()
factory
KtMutableMap.from([Map<K, V> map = const {}])
factory

Properties

entries → KtMutableSet<KtMutableMapEntry<K, V>>
Returns a KtMutableSet of all key/value pairs in this map.
read-only, override
hashCode → int
The hash code for this object. [...]
read-only, inherited
iter → Iterable<KtMapEntry<K, V>>
Access to a Iterable to be used in for-loops
read-only, inherited
keys → KtMutableSet<K>
Returns a KtMutableSet of all keys in this map.
read-only, override
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited
size → int
Returns the number of key/value pairs in the map.
read-only, inherited
values → KtMutableCollection<V>
Returns a KtMutableCollection of all values in this map. Note that this collection may contain duplicate values.
read-only, override

Methods

asMap() → Map<K, V>
Creates a Map instance that wraps the original KtMap. It acts as a view. [...]
override
clear() → void
Removes all elements from this map.
containsKey(K key) → bool
Returns true if the map contains the specified key.
inherited
containsValue(V value) → bool
Returns true if the map maps one or more keys to the specified value.
inherited
get(K key) → V?
Returns the value corresponding to the given key, or null if such a key is not present in the map.
inherited
getOrDefault(K key, V defaultValue) → V?
Returns the value corresponding to the given key, or defaultValue if such a key is not present in the map.
inherited
isEmpty() → bool
Returns true if the map is empty (contains no elements), false otherwise.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
put(K key, V value) → V?
Associates the specified value with the specified key in the map. [...]
putAll(KtMap<K, V> from) → void
Updates this map with key/value pairs from the specified map from.
remove(K key) → V?
Removes the specified key and its corresponding value from this map. [...]
removeMapping(K key, V value) → bool
Removes the entry for the specified key only if it is mapped to the specified value. [...]
toString() → String
A string representation of this object. [...]
inherited

Operators

operator ==(Object other) → bool
The equality operator. [...]
inherited
operator [](K key) → V?
Returns the value corresponding to the given key, or null if such a key is not present in the map.
inherited
operator []=(K key, V value) → void
Associates the specified value with the specified key in the map.