ListBase<E> class Null safety

Abstract implementation of a list.

ListBase can be used as a base class for implementing the List interface.

All operations are defined in terms of length, operator[], operator[]= and length=, which need to be implemented.

NOTICE: Forwarding just these four operations to a normal growable List (as created by []) will give very bad performance for add and addAll operations of ListBase. These operations are implemented by increasing the length of the list by one for each add operation, and repeatedly increasing the length of a growable list is not efficient. To avoid this, either override 'add' and 'addAll' to also forward directly to the growable list, or, preferably, use DelegatingList from "package:collection/collection.dart" instead.

Mixed in types
Implementers

Constructors

ListBase()

Properties

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

Methods

add(E element) → void
Adds value to the end of this list, extending the length by one. [...]
inherited
addAll(Iterable<E> iterable) → void
Appends all objects of iterable to the end of this list. [...]
inherited
any(bool test(E element)) → bool
Checks whether any element of this iterable satisfies test. [...]
inherited
asMap() → Map<int, E>
Returns an unmodifiable Map view of this. [...]
inherited
cast<R>() → List<R>
Returns a view of this list as a list of R instances. [...]
inherited
clear() → void
Removes all objects from this list; the length of the list becomes zero. [...]
inherited
contains(Object? element) → bool
Returns true if the collection contains an element equal to element. [...]
inherited
elementAt(int index) → E
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
fillRange(int start, int end, [E fill]) → void
Sets the objects in the range start inclusive to end exclusive to the given fillValue. [...]
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
forEach(void action(E element)) → void
Applies the function f to each element of this collection in iteration order.
inherited
getRange(int start, int end) → Iterable<E>
Returns an Iterable that iterates over the objects in the range start inclusive to end exclusive. [...]
inherited
indexOf(Object? element, [int start = 0]) → int
Returns the first index of element in this list. [...]
inherited
indexWhere(bool test(E element), [int start = 0]) → int
Returns the first index in the list that satisfies the provided test. [...]
inherited
insert(int index, E element) → void
Inserts the object at position index in this list. [...]
inherited
insertAll(int index, Iterable<E> iterable) → void
Inserts all objects of iterable at position index in this list. [...]
inherited
join([String separator = ""]) → String
Converts each element to a String and concatenates the strings. [...]
inherited
lastIndexOf(Object? element, [int? start]) → int
Returns the last index of element in this list. [...]
inherited
lastIndexWhere(bool test(E element), [int? start]) → int
Returns the last index in the list that satisfies the provided test. [...]
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 element)) → 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 previousValue, E element)) → E
Reduces a collection to a single value by iteratively combining elements of the collection using the provided function. [...]
inherited
remove(Object? element) → bool
Removes the first occurrence of value from this list. [...]
inherited
removeAt(int index) → E
Removes the object at position index from this list. [...]
inherited
removeLast() → E
Pops and returns the last object in this list. [...]
inherited
removeRange(int start, int end) → void
Removes the objects in the range start inclusive to end exclusive. [...]
inherited
removeWhere(bool test(E element)) → void
Removes all objects from this list that satisfy test. [...]
inherited
replaceRange(int start, int end, Iterable<E> newContents) → void
Removes the objects in the range start inclusive to end exclusive and inserts the contents of replacement in its place. [...]
inherited
retainWhere(bool test(E element)) → void
Removes all objects from this list that fail to satisfy test. [...]
inherited
setAll(int index, Iterable<E> iterable) → void
Overwrites objects of this with the objects of iterable, starting at position index in this list. [...]
inherited
setRange(int start, int end, Iterable<E> iterable, [int skipCount = 0]) → void
Copies the objects of iterable, skipping skipCount objects first, into the range start, inclusive, to end, exclusive, of the list. [...]
inherited
shuffle([Random? random]) → void
Shuffles the elements of this list randomly.
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 element)) → Iterable<E>
Returns an Iterable that skips leading elements while test is satisfied. [...]
inherited
sort([int compare(E a, E b)]) → void
Sorts this list according to the order specified by the compare function. [...]
inherited
sublist(int start, [int? end]) → List<E>
Returns a new list containing the elements between start and end. [...]
inherited
take(int count) → Iterable<E>
Returns a lazy iterable of the count first elements of this iterable. [...]
inherited
takeWhile(bool test(E element)) → 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 this object.
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 +(List<E> other) → List<E>
Returns the concatenation of this list and other. [...]
inherited
operator ==(Object other) → bool
The equality operator. [...]
inherited
operator [](int index) → E
Returns the object at the given index in the list or throws a RangeError if index is out of bounds.
inherited
operator []=(int index, E value) → void
Sets the value at the given index in the list to value or throws a RangeError if index is out of bounds.
inherited

Static Methods

listToString(List list) → String
Converts a List to a String. [...]