ListQueue<E> class

List based Queue.

Keeps a cyclic buffer of elements, and grows to a larger buffer when it fills up. This guarantees constant time peek and remove operations, and amortized constant time add operations.

The structure is efficient for any queue or stack usage.

Inheritance
Implemented types

Constructors

ListQueue([int? initialCapacity])
Create an empty queue. [...]
ListQueue.from(Iterable elements)
factory
Create a ListQueue containing all elements. [...]
ListQueue.of(Iterable<E> elements)
factory
Create a ListQueue from elements. [...]

Properties

first → E
read-only
Returns the first element. [...]
hashCodeint
read-only, inherited
The hash code for this object. [...]
isEmptybool
read-only
Returns true if there are no elements in this collection. [...]
isNotEmptybool
read-only, inherited
Returns true if there is at least one element in this collection. [...]
iteratorIterator<E>
read-only
Returns a new Iterator that allows iterating the elements of this Iterable. [...]
last → E
read-only
Returns the last element. [...]
lengthint
read-only
Returns the number of elements in the iterable. [...]
runtimeTypeType
read-only, inherited
A representation of the runtime type of the object.
single → E
read-only
Checks that this iterable has only one element, and returns that element. [...]

Methods

add(E value) → void
override
Adds value at the end of the queue.
addAll(Iterable<E> elements) → void
override
Adds all elements of iterable at the end of the queue. The length of the queue is extended by the length of iterable.
addFirst(E value) → void
override
Adds value at the beginning of the queue.
addLast(E value) → void
override
Adds value at the end of the queue.
any(bool test(E element)) → bool
inherited
Checks whether any element of this iterable satisfies test. [...]
cast<R>() → Queue<R>
override
Provides a view of this iterable as an iterable of R instances. [...]
clear() → void
override
Removes all elements in the queue. The size of the queue becomes zero.
contains(Object? element) → bool
inherited
Whether the collection contains an element equal to element. [...]
elementAt(int index) → E
Returns the indexth element. [...]
every(bool test(E element)) → bool
inherited
Checks whether every element of this iterable satisfies test. [...]
expand<T>(Iterable<T> f(E element)) → Iterable<T>
inherited
Expands each element of this Iterable into zero or more elements. [...]
firstWhere(bool test(E element), {E orElse()}) → E
inherited
Returns the first element that satisfies the given predicate test. [...]
fold<T>(T initialValue, T combine(T previousValue, E element)) → T
inherited
Reduces a collection to a single value by iteratively combining each element of the collection with an existing value [...]
followedBy(Iterable<E> other) → Iterable<E>
inherited
Returns the lazy concatenation of this iterable and other. [...]
forEach(void f(E element)) → void
Applies the function f to each element of this collection in iteration order.
join([String separator = ""]) → String
inherited
Converts each element to a String and concatenates the strings. [...]
lastWhere(bool test(E element), {E orElse()}) → E
inherited
Returns the last element that satisfies the given predicate test. [...]
map<T>(T f(E element)) → Iterable<T>
inherited
Returns a new lazy Iterable with elements that are created by calling f on each element of this Iterable in iteration order. [...]
noSuchMethod(Invocation invocation) → dynamic
inherited
Invoked when a non-existent method or property is accessed. [...]
reduce(E combine(E value, E element)) → E
inherited
Reduces a collection to a single value by iteratively combining elements of the collection using the provided function. [...]
remove(Object? value) → bool
override
Remove a single instance of value from the queue. [...]
removeFirst() → E
override
Removes and returns the first element of this queue. [...]
removeLast() → E
override
Removes and returns the last element of the queue. [...]
removeWhere(bool test(E element)) → void
override
Remove all elements matched by test. [...]
retainWhere(bool test(E element)) → void
override
Remove all elements not matched by test. [...]
singleWhere(bool test(E element), {E orElse()}) → E
inherited
Returns the single element that satisfies test. [...]
skip(int count) → Iterable<E>
inherited
Returns an Iterable that provides all but the first count elements. [...]
skipWhile(bool test(E element)) → Iterable<E>
inherited
Returns an Iterable that skips leading elements while test is satisfied. [...]
take(int count) → Iterable<E>
inherited
Returns a lazy iterable of the count first elements of this iterable. [...]
takeWhile(bool test(E element)) → Iterable<E>
inherited
Returns a lazy iterable of the leading elements satisfying test. [...]
toList({bool growable = true}) → List<E>
Creates a List containing the elements of this Iterable. [...]
toSet() → Set<E>
inherited
Creates a Set containing the same elements as this iterable. [...]
toString() → String
override
Returns a string representation of (some of) the elements of this. [...]
where(bool test(E element)) → Iterable<E>
inherited
Returns a new lazy Iterable with all elements that satisfy the predicate test. [...]
whereType<T>() → Iterable<T>
inherited
Returns a new lazy Iterable with all elements that have type T. [...]

Operators

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

© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dart.dev/stable/2.13.0/dart-collection/ListQueue-class.html