MapMixin<K, V> class

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 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.

Implemented types
Implementers

Constructors

MapMixin()

Properties

entries Iterable<MapEntry<K, V>>
The map entries of this.
read-only, override
isEmpty bool
Returns true if there is no key/value pair in the map.
read-only, override
isNotEmpty bool
Returns true if there is at least one key/value pair in the map.
read-only, override
keys Iterable<K>
The keys of this. [...]
read-only, override
length int
The number of key/value pairs in the map.
read-only, override
values Iterable<V>
The values of this. [...]
read-only, override
hashCode int
The hash code for this object. [...]
read-only, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited

Methods

addAll(Map<K, V> other) → void
Adds all key/value pairs of other to this map. [...]
override
addEntries(Iterable<MapEntry<K, V>> newEntries) → void
Adds all key/value pairs of newEntries to this map. [...]
override
cast<RK, RV>() Map<RK, RV>
Provides a view of this map as having RK keys and RV instances, if necessary. [...]
override
clear() → void
Removes all pairs from the map. [...]
override
containsKey(Object key) bool
Returns true if this map contains the given key. [...]
override
containsValue(Object value) bool
Returns true if this map contains the given value. [...]
override
forEach(void action(K key, V value)) → void
Applies f to each key/value pair of the map. [...]
override
map<K2, V2>(MapEntry<K2, V2> transform(K key, V value)) Map<K2, V2>
Returns a new map where all entries of this map are transformed by the given f function.
override
putIfAbsent(K key, V ifAbsent()) → V
Look up the value of key, or add a new value if it isn't there. [...]
override
remove(Object key) → V
Removes key and its associated value, if present, from the map. [...]
override
removeWhere(bool test(K key, V value)) → void
Removes all entries of this map that satisfy the given predicate.
override
toString() String
Returns a string representation of this object.
override
update(K key, V update(V value), {V ifAbsent()}) → V
Updates the value for the provided key. [...]
override
updateAll(V update(K key, V value)) → void
Updates all values. [...]
override
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited

Operators

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