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
Implementers

Constructors

MapView(Map<K, V> map)
const

Properties

entriesIterable<MapEntry<K, V>>
read-only, override
The map entries of this.
hashCodeint
read-only, inherited
The hash code for this object. [...]
isEmptybool
read-only, override
Whether there is no key/value pair in the map.
isNotEmptybool
read-only, override
Whether there is at least one key/value pair in the map.
keysIterable<K>
read-only, override
The keys of this. [...]
lengthint
read-only, override
The number of key/value pairs in the map.
runtimeTypeType
read-only, inherited
A representation of the runtime type of the object.
valuesIterable<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. [...]

© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dart.dev/stable/2.13.0/dart-collection/MapView-class.html