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.
- Implements
-
- Implemented by
Constructors
- MapView(Map<K, V> map)
const
Properties
- entries → Iterable<MapEntry<K, V>>
read-only
- The map entries of this.
- isEmpty → bool
read-only
- Returns true if there is no key/value pair in the map.
- isNotEmpty → bool
read-only
- Returns true if there is at least one key/value pair in the map.
- keys → Iterable<K>
read-only
- The keys of this. [...]
- length → int
read-only
- The number of key/value pairs in the map.
- values → Iterable<V>
read-only
- The values of this. [...]
- hashCode → int
read-only, inherited
- The hash code for this object. [...]
- runtimeType → Type
read-only, inherited
- A representation of the runtime type of the object.
Methods
- addAll(Map<K, V> other) → void
- Adds all key/value pairs of
other to this map. [...] - addEntries(Iterable<Object> entries) → void
- Adds all key/value pairs of
newEntries to this map. [...] - cast<RK, RV>() → Map<RK, RV>
- Provides a view of this map as having
RK keys and RV instances, if necessary. [...] - clear() → void
- Removes all pairs from the map. [...]
- containsKey(Object key) → bool
- Returns true if this map contains the given
key. [...] - containsValue(Object value) → bool
- Returns true if this map contains the given
value. [...] - forEach(void action(K key, V value)) → void
- Applies
f to each key/value pair of the map. [...] - 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
f function. - putIfAbsent(K key, V ifAbsent()) → V
- Look up the value of
key, or add a new value if it isn't there. [...] - remove(Object key) → V
- Removes
key and its associated value, if present, from the map. [...] - removeWhere(bool test(K key, V value)) → void
- Removes all entries of this map that satisfy the given
predicate. - toString() → String
- Returns a string representation of this object.
- update(K key, V update(V value), { V ifAbsent() }) → V
- Updates the value for the provided
key. [...] - updateAll(V update(K key, V value)) → void
- Updates all values. [...]
- noSuchMethod(Invocation invocation) → dynamic
inherited
- Invoked when a non-existent method or property is accessed. [...]
Operators
- operator [](Object key) → V
- Returns the value for the given
key or null if key is not in the map. [...] - operator []=(K key, V value) → void
- Associates the
key with the given value. [...] - operator ==(dynamic other) → bool
inherited
- The equality operator. [...]