ObservableMap<K, V> class

A reactive map that notifies listeners on any modification.

ObservableMap implements MapMixin so it can be used as a regular Dart map. Any mutation triggers change notifications.

Usage:

final data = ObservableMap<String, int>();
data.onChange.listen((change) => print('Change: ${change.type} at ${change.key}'));
data['count'] = 1; // Notifies listeners
Inheritance

Constructors

ObservableMap([Map<K, V>? entries])
Creates an ObservableMap with optional initial entries.

Properties

entries → Iterable<MapEntry<K, V>>
The map entries of this Map.
no setterinherited
hashCode → int
The hash code for this object.
no setterinherited
isEmpty → bool
Whether there is no key/value pair in the map.
no setterinherited
isNotEmpty → bool
Whether there is at least one key/value pair in the map.
no setterinherited
keys → Iterable<K>
The keys of this Map.
no setteroverride
length → int
The number of key/value pairs in the map.
no setteroverride
onChange → Stream<MapChange<K, V>>
A stream of map changes.
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
values → Iterable<V>
The values of this Map.
no setterinherited

Methods

addAll(Map<K, V> other) → void
Adds all key/value pairs of other to this map.
inherited
addChangeListener(void listener(MapChange<K, V>)) → void
Registers a listener for map changes.
addEntries(Iterable<MapEntry<K, V>> newEntries) → void
Adds all key/value pairs of newEntries to this map.
inherited
cast<RK, RV>() → Map<RK, RV>
Provides a view of this map as having RK keys and RV instances, if necessary.
inherited
clear() → void
Removes all entries from the map.
override
containsKey(Object? key) → bool
Whether this map contains the given key.
inherited
containsValue(Object? value) → bool
Whether this map contains the given value.
inherited
dispose() → void
Disposes the observable map.
forEach(void action(K key, V value)) → void
Applies action to each key/value pair of the map.
inherited
map<K2, V2>(MapEntry<K2, V2> transform(K key, V value)) → Map<K2, V2>
Returns a new map where all entries of this map are transformed by the given convert function.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
putIfAbsent(K key, V ifAbsent()) → V
Look up the value of key, or add a new entry if it isn't there.
inherited
remove(Object? key) → V?
Removes key and its associated value, if present, from the map.
override
removeChangeListener(void listener(MapChange<K, V>)) → void
Removes a previously registered change listener.
removeWhere(bool test(K key, V value)) → void
Removes all entries of this map that satisfy the given test.
inherited
toString() → String
A string representation of this object.
inherited
update(K key, V update(V value), {V ifAbsent()?}) → V
Updates the value for the provided key.
inherited
updateAll(V update(K key, V value)) → void
Updates all values.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited
operator [](Object? key) → V?
The value for the given key, or null if key is not in the map.
override
operator []=(K key, V value) → void
Associates the key with the given value.
override