# LinkedList<E extends LinkedListEntry<E>> class

A specialized double-linked list of elements that extends LinkedListEntry.

This is not a generic data structure. It only accepts elements that extend the LinkedListEntry class. See the Queue implementations for generic collections that allow constant time adding and removing at the ends.

This is not a List implementation. Despite its name, this class does not implement the List interface. It does not allow constant time lookup by index.

Because the elements themselves contain the links of this linked list, each element can be in only one list at a time. To add an element to another list, it must first be removed from its current list (if any).

In return, each element knows its own place in the linked list, as well as which list it is in. This allows constant time LinkedListEntry.insertAfter, LinkedListEntry.insertBefore and LinkedListEntry.unlink operations when all you have is the element.

A `LinkedList` also allows constant time adding and removing at either end, and a constant time length getter.

Inheritance
  - Object
  - Iterable<E>
  - LinkedList

## Constructors

LinkedList()
  Construct a new empty linked list.

## Properties

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

## Methods

add(E entry) → void
  Add `entry` to the end of the linked list.
addAll(Iterable<E> entries) → void
  Add `entries` to the end of the linked list.
addFirst(E entry) → void
  Add `entry` to the beginning of the linked list.
clear() → void
  Remove all elements from this linked list.
forEach(void action(E entry)) → void
  Call `action` with each entry in this linked list. [...]
remove(E entry) → bool
  Remove `entry` from the linked 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
contains(Object element) → bool
  Returns true if the collection contains an element equal to `element`. [...]
  inherited
elementAt(int index) → E
  Returns the `index`th 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), { E orElse() }) → E
  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<E> other) → Iterable<E>
  Returns the lazy concatentation of this iterable and `other`. [...]
  inherited
join([String separator = "" ]) → String
  Converts each element to a String and concatenates the strings. [...]
  inherited
lastWhere(bool test(E element), { E orElse() }) → E
  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(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
singleWhere(bool test(E element), { E orElse() }) → E
  Returns the single element that satisfies `test`. [...]
  inherited
skip(int count) → Iterable<E>
  Returns an Iterable that provides all but the first `count` elements. [...]
  inherited
skipWhile(bool test(E value)) → Iterable<E>
  Returns an `Iterable` that skips leading elements while `test` is satisfied. [...]
  inherited
take(int count) → Iterable<E>
  Returns a lazy iterable of the `count` first elements of this iterable. [...]
  inherited
takeWhile(bool test(E value)) → Iterable<E>
  Returns 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
  Returns a string representation of (some of) the elements of `this`. [...]
  inherited
where(bool test(E element)) → Iterable<E>
  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