Queue<E> class

A Queue is a collection that can be manipulated at both ends. One can iterate over the elements of a queue through forEach or with an Iterator.

A Queue is a collection that can be manipulated at both ends. One can iterate over the elements of a queue through forEach or with an Iterator.

It is generally not allowed to modify the queue (add or remove entries) while an operation on the queue is being performed, for example during a call to forEach. Modifying the queue while it is being iterated will most likely break the iteration. This goes both for using the iterator directly, or for iterating an Iterable returned by a method like map or where.

Implements:
Implementors

Constructors

Queue ( )
Creates a queue.
Queue.from ( Iterable elements )
Creates a queue containing all elements.

Instance Properties

isEmpty bool Inherited
read-only
iterator Iterator<E> Inherited
read-only
isNotEmpty bool Inherited
read-only
first E Inherited
read-only
last E Inherited
read-only
single E Inherited
read-only
length int Inherited
read-only

Instance Methods

removeFirst ( ) → E
Removes and returns the first element of this queue.
removeLast ( ) → E
Removes and returns the last element of the queue.
addFirst ( E value ) → void
Adds value at the beginning of the queue.
addLast ( E value ) → void
Adds value at the end of the queue.
add ( E value ) → void
Adds value at the end of the queue.
remove ( Object value ) → bool
Remove a single instance of value from the queue.
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.
removeWhere ( bool test(E element) ) → void
Removes all elements matched by test from the queue.
retainWhere ( bool test(E element) ) → void
Removes all elements not matched by test from the queue.
clear ( ) → void
Removes all elements in the queue. The size of the queue becomes zero.
take Inherited ( int n ) → Iterable<E>
Returns a lazy iterable of the count first elements of this iterable.
map Inherited ( dynamic f(E element) ) → Iterable
Returns a new lazy Iterable with elements that are created by calling f on each element of this Iterable in iteration order.
takeWhile Inherited ( bool test(E value) ) → Iterable<E>
Returns a lazy iterable of the leading elements satisfying test.
fold Inherited ( initialValue, dynamic combine(previousValue, E element) ) → dynamic
Reduces a collection to a single value by iteratively combining each element of the collection with an existing value
toSet Inherited ( ) → Set<E>
Creates a Set containing the same elements as this iterable.
firstWhere Inherited ( bool test(E element), {E orElse()} ) → E
Returns the first element that satisfies the given predicate test.
forEach Inherited ( void f(E element) ) → void
Applies the function f to each element of this collection in iteration order.
skipWhile Inherited ( bool test(E value) ) → Iterable<E>
Returns an Iterable that skips leading elements while test is satisfied.
join Inherited ( [String separator = ""] ) → String
Converts each element to a String and concatenates the strings.
contains Inherited ( Object element ) → bool
Returns true if the collection contains an element equal to element.
lastWhere Inherited ( bool test(E element), {E orElse()} ) → E
Returns the last element that satisfies the given predicate test.
singleWhere Inherited ( bool test(E element) ) → E
Returns the single element that satisfies test.
reduce Inherited ( 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.
every Inherited ( bool f(E element) ) → bool
Checks whether every element of this iterable satisfies test.
any Inherited ( bool f(E element) ) → bool
Checks whether any element of this iterable satisfies test.
toList Inherited ( {bool growable: true} ) → List<E>
Creates a List containing the elements of this Iterable.
where Inherited ( bool f(E element) ) → Iterable<E>
Returns a new lazy Iterable with all elements that satisfy the predicate test.
skip Inherited ( int n ) → Iterable<E>
Returns an Iterable that provides all but the first count elements.
expand Inherited ( Iterable f(E element) ) → Iterable
Expands each element of this Iterableinto zero or more elements.
elementAt Inherited ( int index ) → E
Returns the indexth element.