MapBase abstract class
Base class for implementing a Map.
This class has a basic implementation of all but five of the members of Map. A basic Map class can be implemented by extending this class and implementing keys, operator[], operator[]=, remove and clear. The remaining operations are implemented in terms of these five.
The keys iterable should have efficient length and contains operations, and it should catch concurrent modifications of the keys while iterating.
A more efficient implementation is usually possible by overriding some of the other members as well.
- Mixes-in
- MapMixin<K, V>
- Implemented by
Constructors
- MapBase()
Properties
- hashCode → int read-only, inherited
-
The hash code for this object.
- isEmpty → bool read-only, inherited
- isNotEmpty → bool read-only, inherited
- keys → Iterable<K> read-only, inherited
- length → int read-only, inherited
- runtimeType → Type read-only, inherited
-
A representation of the runtime type of the object.
- values → Iterable<V> read-only, inherited
Operators
- operator ==(
other) → bool inherited -
The equality operator.
- operator [](
Object key) → V inherited -
Returns the value for the given
keyor null ifkeyis not in the map. - operator []=(
K key, V value) → dynamic inherited -
Associates the
keywith the givenvalue.
Methods
- addAll(
Map<K, V> other) → void inherited -
Adds all key-value pairs of
otherto this map. - clear(
) → void inherited -
Removes all pairs from the map.
- containsKey(
Object key) → bool inherited -
Returns true if this map contains the given
key. - containsValue(
Object value) → bool inherited -
Returns true if this map contains the given
value. - forEach(
void action(K key, V value)) → void inherited -
Applies
fto each key-value pair of the map. - noSuchMethod(
Invocation invocation) → dynamic inherited -
Invoked when a non-existent method or property is accessed.
- putIfAbsent(
K key, V ifAbsent()) → V inherited -
Look up the value of
key, or add a new value if it isn't there. - remove(
Object key) → V inherited -
Removes
keyand its associated value, if present, from the map. - toString(
) → String inherited -
Returns a string representation of this object.
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-collection/MapBase-class.html