HashedObserverList<T> class
A list optimized for the observer pattern, but for larger numbers of observers.
For small numbers of observers (e.g. less than 10), use ObserverList instead.
The iteration semantics of the this class are slightly different from ObserverList. This class will only return an item once in the iterator, no matter how many times it was added, although it does require that an item be removed as many times as it was added for it to stop appearing in the iterator. It will return them in the order the first instance of an item was originally added.
See also:
- ObserverList for a list that is fast for small numbers of observers.
- Inheritance
- Available Extensions
Constructors
Properties
- first → T
-
The first element.
no setterinherited
- hashCode → int
-
The hash code for this object.
no setterinherited
- isEmpty → bool
-
Whether this collection has no elements.
no setteroverride
- isNotEmpty → bool
-
Whether this collection has at least one element.
no setteroverride
-
iterator
→ Iterator<
T> -
A new
Iteratorthat allows iterating the elements of thisIterable.no setteroverride - last → T
-
The last element.
no setterinherited
- length → int
-
The number of elements in this Iterable.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- single → T
-
Checks that this iterable has only one element, and returns that element.
no setterinherited
Methods
-
add(
T item) → void - Adds an item to the end of this list.
-
any(
bool test(T element)) → bool -
Checks whether any element of this iterable satisfies
test.inherited -
cast<
R> () → Iterable< R> -
A view of this iterable as an iterable of
Rinstances.inherited -
contains(
Object? element) → bool -
Whether the collection contains an element equal to
element.override -
elementAt(
int index) → T -
Returns the
indexth element.inherited -
every(
bool test(T element)) → bool -
Checks whether every element of this iterable satisfies
test.inherited -
expand<
T> (Iterable< T> toElements(T element)) → Iterable<T> -
Expands each element of this Iterable into zero or more elements.
inherited
-
firstWhere(
bool test(T element), {T orElse()?}) → T -
The first element that satisfies the given predicate
test.inherited -
fold<
T> (T initialValue, T combine(T previousValue, T element)) → T -
Reduces a collection to a single value by iteratively combining each
element of the collection with an existing value
inherited
-
followedBy(
Iterable< T> other) → Iterable<T> -
Creates the lazy concatenation of this iterable and
other.inherited -
forEach(
void action(T element)) → void -
Invokes
actionon each element of this iterable in iteration order.inherited -
join(
[String separator = ""]) → String -
Converts each element to a String and concatenates the strings.
inherited
-
lastWhere(
bool test(T element), {T orElse()?}) → T -
The last element that satisfies the given predicate
test.inherited -
map<
T> (T toElement(T e)) → Iterable< T> -
The current elements of this iterable modified by
toElement.inherited -
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
reduce(
T combine(T value, T element)) → T -
Reduces a collection to a single value by iteratively combining elements
of the collection using the provided function.
inherited
-
remove(
T item) → bool - Removes an item from the list.
-
singleWhere(
bool test(T element), {T orElse()?}) → T -
The single element that satisfies
test.inherited -
skip(
int count) → Iterable< T> -
Creates an Iterable that provides all but the first
countelements.inherited -
skipWhile(
bool test(T value)) → Iterable< T> -
Creates an
Iterablethat skips leading elements whiletestis satisfied.inherited -
take(
int count) → Iterable< T> -
Creates a lazy iterable of the
countfirst elements of this iterable.inherited -
takeWhile(
bool test(T value)) → Iterable< T> -
Creates a lazy iterable of the leading elements satisfying
test.inherited -
toList(
{bool growable = true}) → List< T> -
Creates a List containing the elements of this Iterable.
inherited
-
toSet(
) → Set< T> -
Creates a Set containing the same elements as this iterable.
inherited
-
toString(
) → String -
Returns a string representation of (some of) the elements of
this.inherited -
where(
bool test(T element)) → Iterable< T> -
Creates a new lazy Iterable with all elements that satisfy the
predicate
test.inherited -
whereType<
T> () → Iterable< T> -
Creates a new lazy Iterable with all elements that have type
T.inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited