ObserverList<T> class

A list optimized for containment queries.

Consider using an ObserverList instead of a List when the number of contains calls dominates the number of add and remove calls.

Inheritance
  • Object
  • Iterable<T>
  • ObserverList

Constructors

ObserverList()

Properties

isEmpty → bool
Returns true if there are no elements in this collection. [...]
read-only
isNotEmpty → bool
Returns true if there is at least one element in this collection. [...]
read-only
iterator → Iterator<T>
Returns a new Iterator that allows iterating the elements of this Iterable. [...]
read-only
first → T
Returns the first element. [...]
read-only, inherited
hashCode → int
The hash code for this object. [...]
read-only, inherited
last → T
Returns the last element. [...]
read-only, inherited
length → int
Returns the number of elements in this. [...]
read-only, inherited
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited
single → T
Checks that this iterable has only one element, and returns that element. [...]
read-only, inherited

Methods

add(T item) → void
Adds an item to the end of this list.
contains(Object element) → bool
Returns true if the collection contains an element equal to element. [...]
remove(T item) → bool
Removes an item from the list. [...]
any(bool test(E element)) → bool
Checks whether any element of this iterable satisfies test. [...]
inherited
cast<R>() → Iterable<R>
Provides a view of this iterable as an iterable of R instances. [...]
inherited
elementAt(int index) → T
Returns the indexth element. [...]
inherited
every(bool test(E element)) → bool
Checks whether every element of this iterable satisfies test. [...]
inherited
expand<T>(Iterable<T> f(E element)) → Iterable<T>
Expands each element of this Iterable into zero or more elements. [...]
inherited
firstWhere(bool test(E element), { T orElse() }) → T
Returns the first element that satisfies the given predicate test. [...]
inherited
fold<T>(T initialValue, T combine(T previousValue, E 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>
Returns the lazy concatentation of this iterable and other. [...]
inherited
forEach(void f(E element)) → void
Applies the function f to each element of this collection in iteration order.
inherited
join([String separator = "" ]) → String
Converts each element to a String and concatenates the strings. [...]
inherited
lastWhere(bool test(E element), { T orElse() }) → T
Returns the last element that satisfies the given predicate test. [...]
inherited
map<T>(T f(E e)) → Iterable<T>
Returns a new lazy Iterable with elements that are created by calling f on each element of this Iterable in iteration order. [...]
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
reduce(T combine(E value, E element)) → T
Reduces a collection to a single value by iteratively combining elements of the collection using the provided function. [...]
inherited
singleWhere(bool test(E element), { T orElse() }) → T
Returns the single element that satisfies test. [...]
inherited
skip(int count) → Iterable<T>
Returns an Iterable that provides all but the first count elements. [...]
inherited
skipWhile(bool test(E value)) → Iterable<T>
Returns an Iterable that skips leading elements while test is satisfied. [...]
inherited
take(int count) → Iterable<T>
Returns a lazy iterable of the count first elements of this iterable. [...]
inherited
takeWhile(bool test(E value)) → Iterable<T>
Returns 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(E element)) → Iterable<T>
Returns a new lazy Iterable with all elements that satisfy the predicate test. [...]
inherited
whereType<T>() → Iterable<T>
Returns a new lazy Iterable with all elements that have type T. [...]
inherited

Operators

operator ==(dynamic other) → bool
The equality operator. [...]
inherited