class
MapMixin<K, V>

Mixin implementing a Map.

This mixin has a basic implementation of all but five of the members of Map. A basic Map class can be implemented by mixin in 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.

Implements
Implemented by

Properties

Iterable<K> keys
read-only
int length
read-only
bool isEmpty
read-only
bool isNotEmpty
read-only
Iterable<V> values
read-only

Constructors

MapMixin()

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) → dynamic
Associates the [key] with the given [value].

Methods

remove(Object key) → V
Removes [key] and its associated value, if present, from the map.
clear() → void
Removes all pairs from the map.
forEach(void action(K key, V value)) → void
Applies [f] to each key-value pair of the map.
addAll(Map<K,V> other) → void
Adds all key-value pairs of [other] to this map.
containsValue(V value) → bool
Returns true if this map contains the given [value].
putIfAbsent(K key, V ifAbsent()) → V
Look up the value of [key], or add a new value if it isn't there.
containsKey(Object key) → bool
Returns true if this map contains the given [key].
toString() → String
Returns a string representation of this object.