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
- MapMixin<K, V>
- 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
Operators
-
operator ==(
other) → bool -
The equality operator.
inherited -
operator [](
Object key) → V -
Returns the value for the given
keyor null ifkeyis not in the map.inherited -
operator []=(
K key, V value) → dynamic -
Associates the
keywith the givenvalue.inherited
Methods
-
addAll(
Map<K, V> other) → void -
Adds all key-value pairs of
otherto 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
fto 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
keyand its associated value, if present, from the map.inherited -
toString(
) → String -
Returns a string representation of this object.
inherited