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 Iterable.length and Iterable.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

Constructors

MapBase()

Properties

hashCode → int
The hash code for this object. [...]
read-only, inherited
isEmpty → bool
read-only, inherited
isNotEmpty → bool
read-only, inherited
keys → Iterable<K>
read-only, inherited
length → int
read-only, inherited
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited
values → Iterable<V>
read-only, inherited

Methods

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

Operators

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