Base implementation of a List class.

ListMixin can be used as a mixin to make a class implement the List interface.

This implements all read operations using only the length and operator[] members. It implements write operations using those and length= and operator[]=

NOTICE: Forwarding just these four operations to a normal growable List (as created by new List()) 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, if possible, use DelegatingList from "package:collection/wrappers.dart" instead.

Implements
Implemented by

Constructors

ListMixin()

Properties

first → E

read-only
isEmpty → bool

read-only
isNotEmpty → bool

read-only
iterator → Iterator<E>

read-only
last → E

read-only
reversed → Iterable<E>

read-only
single → E

read-only
hashCode → int

The hash code for this object.

read-only, inherited
length → int

Returns the number of objects in this list.

read / write, inherited
runtimeType → Type

A representation of the runtime type of the object.

read-only, inherited

Operators

operator ==(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

Methods

add(E element) → void

Adds value to the end of this list, extending the length by one.

addAll(Iterable<E> iterable) → void

Appends all objects of iterable to the end of this list.

any(bool test(E element)) → bool

Checks whether any element of this iterable satisfies test.

asMap() → Map<int, E>

Returns an unmodifiable Map view of this.

clear() → void

Removes all objects from this list; the length of the list becomes zero.

contains(Object element) → bool

Returns true if the collection contains an element equal to element.

elementAt(int index) → E

Returns the indexth element.

every(bool test(E element)) → bool

Checks whether every element of this iterable satisfies test.

expand<T>(Iterable<T> f(E element)) → Iterable<T>

Expands each element of this Iterable into zero or more elements.

fillRange(int start, int end, [ E fill ]) → void

Sets the objects in the range start inclusive to end exclusive to the given fillValue.

firstWhere(bool test(E element), { E orElse() }) → E

Returns the first element that satisfies the given predicate test.

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

forEach(void action(E element)) → void

Applies the function f to each element of this collection in iteration order.

getRange(int start, int end) → Iterable<E>

Returns an Iterable that iterates over the objects in the range start inclusive to end exclusive.

indexOf(Object element, [ int startIndex = 0 ]) → int

Returns the first index of element in this list.

insert(int index, E element) → void

Inserts the object at position index in this list.

insertAll(int index, Iterable<E> iterable) → void

Inserts all objects of iterable at position index in this list.

join([String separator = "" ]) → String

Converts each element to a String and concatenates the strings.

lastIndexOf(Object element, [ int startIndex ]) → int

Returns the last index in the list a of the given element, starting the search at index startIndex to 0. Returns -1 if element is not found.

lastWhere(bool test(E element), { E orElse() }) → E

Returns the last element that satisfies the given predicate test.

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.

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.

remove(Object element) → bool

Removes the first occurrence of value from this list.

removeAt(int index) → E

Removes the object at position index from this list.

removeLast() → E

Pops and returns the last object in this list.

removeRange(int start, int end) → void

Removes the objects in the range start inclusive to end exclusive.

removeWhere(bool test(E element)) → void

Removes all objects from this list that satisfy test.

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.

retainWhere(bool test(E element)) → void

Removes all objects from this list that fail to satisfy test.

setAll(int index, Iterable<E> iterable) → void

Overwrites objects of this with the objects of iterable, starting at position index in this list.

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.

shuffle([Random random ]) → void

Shuffles the elements of this list randomly.

singleWhere(bool test(E element)) → E

Returns the single element that satisfies test.

skip(int count) → Iterable<E>

Returns an Iterable that provides all but the first count elements.

skipWhile(bool test(E element)) → Iterable<E>

Returns an Iterable that skips leading elements while test is satisfied.

sort([int compare(E a, E b) ]) → void

Sorts this list according to the order specified by the compare function.

sublist(int start, [ int end ]) → List<E>

Returns a new list containing the objects from start inclusive to end exclusive.

take(int count) → Iterable<E>

Returns a lazy iterable of the count first elements of this iterable.

takeWhile(bool test(E element)) → Iterable<E>

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>

Creates a Set containing the same elements as this iterable.

toString() → String

Returns a string representation of this object.

where(bool test(E element)) → Iterable<E>

Returns a new lazy Iterable with all elements that satisfy the predicate test.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a non-existent method or property is accessed.

inherited