DelegatingQueue<E> class

A Queue that delegates all operations to a base queue.

This class can be used to hide non-Queue methods of a queue object, or it can be extended to add extra functionality on top of an existing queue object.

Implemented types
Available extensions

Constructors

DelegatingQueue(Queue<E> queue)
const

Properties

first → E
The first element.
no setterinherited
hashCode int
The hash code for this object.
no setterinherited
isEmpty bool
Whether this collection has no elements.
no setterinherited
isNotEmpty bool
Whether this collection has at least one element.
no setterinherited
iterator Iterator<E>
A new Iterator that allows iterating the elements of this Iterable.
no setterinherited
last → E
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 → E
Checks that this iterable has only one element, and returns that element.
no setterinherited

Methods

add(E value) → void
Adds value at the end of the queue.
override
addAll(Iterable<E> iterable) → void
Adds all elements of iterable at the end of the queue. The length of the queue is extended by the length of iterable.
override
addFirst(E value) → void
Adds value at the beginning of the queue.
override
addLast(E value) → void
Adds value at the end of the queue.
override
any(bool test(E)) bool
Checks whether any element of this iterable satisfies test.
inherited
cast<T>() Queue<T>
A view of this iterable as an iterable of R instances.
clear() → void
Removes all elements in the queue. The size of the queue becomes zero.
override
contains(Object? element) bool
Whether the collection contains an element equal to element.
inherited
elementAt(int index) → E
Returns the indexth element.
inherited
every(bool test(E)) bool
Checks whether every element of this iterable satisfies test.
inherited
expand<T>(Iterable<T> f(E)) Iterable<T>
Expands each element of this Iterable into zero or more elements.
inherited
firstWhere(bool test(E), {E orElse()?}) → E
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<E> other) Iterable<E>
Creates the lazy concatenation of this iterable and other.
inherited
forEach(void f(E)) → void
Invokes action on 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(E), {E orElse()?}) → E
The last element that satisfies the given predicate test.
inherited
map<T>(T f(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(E combine(E value, E element)) → E
Reduces a collection to a single value by iteratively combining elements of the collection using the provided function.
inherited
remove(Object? object) bool
Removes a single instance of value from the queue.
override
removeFirst() → E
Removes and returns the first element of this queue.
override
removeLast() → E
Removes and returns the last element of the queue.
override
removeWhere(bool test(E)) → void
Removes all elements matched by test from the queue.
override
retainWhere(bool test(E)) → void
Removes all elements not matched by test from the queue.
override
retype<T>() Queue<T>
singleWhere(bool test(E), {E orElse()?}) → E
The single element that satisfies test.
inherited
skip(int n) Iterable<E>
Creates an Iterable that provides all but the first count elements.
inherited
skipWhile(bool test(E)) Iterable<E>
Creates an Iterable that skips leading elements while test is satisfied.
inherited
take(int n) Iterable<E>
Creates a lazy iterable of the count first elements of this iterable.
inherited
takeWhile(bool test(E)) Iterable<E>
Creates a lazy iterable of the leading elements satisfying test.
inherited
toList({bool growable = true}) List<E>
Creates a List containing the elements of this Iterable.
inherited
toSet() Set<E>
Creates a Set containing the same elements as this iterable.
inherited
toString() String
A string representation of this object.
inherited
where(bool test(E)) Iterable<E>
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

Static Methods

typed<E>(Queue base) Queue<E>
Creates a wrapper that asserts the types of values in base.