class
MapBase<K, V>

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
Implemented by

Properties

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

Constructors

MapBase()
const

Operators

operator []=(K key, V value) → dynamic
inherited
Associates the [key] with the given [value].
operator [](Object key) → V
inherited
Returns the value for the given [key] or null if [key] is not in the map.

Methods

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