dart:collection

MapView<K, V> class

Wrapper around a class that implements Map that only exposes Map members.

A simple wrapper that delegates all Map members to the map provided in the constructor.

Base for delegating map implementations like UnmodifiableMapView.

Implemented types

• Map<K, V>

Implementers

• UnmodifiableMapView

Constructors

MapView(Map<K, V> map)

const

Properties

entries → Iterable<MapEntry<K, V>>

read-only, override

The map entries of this.

hashCode → int

read-only, inherited

The hash code for this object. [...]

isEmpty → bool

read-only, override

Whether there is no key/value pair in the map.

isNotEmpty → bool

read-only, override

Whether there is at least one key/value pair in the map.

keys → Iterable<K>

read-only, override

The keys of this. [...]

length → int

read-only, override

The number of key/value pairs in the map.

runtimeType → Type

read-only, inherited

A representation of the runtime type of the object.

values → Iterable<V>

read-only, override

The values of this. [...]

Methods

addAll(Map<K, V> other) → void

override

Adds all key/value pairs of other to this map. [...]

addEntries(Iterable<MapEntry<K, V>> entries) → void

override

Adds all key/value pairs of newEntries to this map. [...]

cast<RK, RV>() → Map<RK, RV>

override

Provides a view of this map as having RK keys and RV instances, if necessary. [...]

clear() → void

override

Removes all entries from the map. [...]

containsKey(Object? key) → bool

override

Whether this map contains the given key. [...]

containsValue(Object? value) → bool

override

Whether this map contains the given value. [...]

forEach(void action(K key, V value)) → void

override

Applies action to each key/value pair of the map. [...]

map<K2, V2>(MapEntry<K2, V2> transform(K key, V value)) → Map<K2, V2>

override

Returns a new map where all entries of this map are transformed by the given convert function.

noSuchMethod(Invocation invocation) → dynamic

inherited

Invoked when a non-existent method or property is accessed. [...]

putIfAbsent(K key, V ifAbsent()) → V

override

Look up the value of key, or add a new entry if it isn't there. [...]

remove(Object? key) → V?

override

Removes key and its associated value, if present, from the map. [...]

removeWhere(bool test(K key, V value)) → void

override

Removes all entries of this map that satisfy the given test.

toString() → String

override

A string representation of this object. [...]

update(K key, V update(V value), {V ifAbsent()}) → V

override

Updates the value for the provided key. [...]

updateAll(V update(K key, V value)) → void

override

Updates all values. [...]

Operators

operator ==(Object other) → bool

inherited

The equality operator. [...]

operator [](Object? key) → V?

override

The value for the given key, or null if key is not in the map. [...]

operator []=(K key, V value) → void

override

Associates the key with the given value. [...]