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

Constructors

MapBase()

Properties

hashCode int

Get a 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

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

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