LruMap<K, V> class abstract

An implementation of a Map which has a maximum size and uses a Least Recently Used algorithm to remove items from the Map when the maximumSize is reached and new items are added.

It is safe to access the keys and values collections without affecting the "used" ordering - as well as using forEach. Other types of access, including bracket, and putIfAbsent, promotes the key-value pair to the MRU position.

Implemented types
Implementers

Constructors

LruMap({int? maximumSize})
Creates a LruMap instance with the default implementation.
factory

Properties

entries → Iterable<MapEntry<K, V>>
The map entries of this Map.
no setterinherited
hashCode → int
The hash code for this object.
no setterinherited
isEmpty → bool
Whether there is no key/value pair in the map.
no setterinherited
isNotEmpty → bool
Whether there is at least one key/value pair in the map.
no setterinherited
keys → Iterable<K>
The keys of this Map.
no setterinherited
length → int
The number of key/value pairs in the map.
no setterinherited
maximumSize ↔ int
Maximum size of the Map. If length exceeds this value at any time, n entries accessed the earliest are removed, where n is length - maximumSize.
getter/setter pair
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
values → Iterable<V>
The values of this Map.
no setterinherited

Methods

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

Operators

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