DelegatingList<E> class Null safety

A List that delegates all operations to a base list.

This class can be used to hide non-List methods of a list object, or it can be extended to add extra functionality on top of an existing list object.

Implemented types
Implementers
Available Extensions

Constructors

DelegatingList(List<E> base)
const

Properties

first ↔ E
Returns the first element. [...]
read / write, inherited-getter, override-setter
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-getter, override-setter
length int
Returns the number of elements in this. [...]
read / write, inherited-getter, override-setter
reversed Iterable<E>
An Iterable of the objects in this list in reverse order.
read-only, override
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 value) → void
Adds value to the end of this list, extending the length by one. [...]
override
addAll(Iterable<E> iterable) → void
Appends all objects of iterable to the end of this list. [...]
override
any(bool test(E)) bool
Checks whether any element of this iterable satisfies test. [...]
inherited
asMap() Map<int, E>
An unmodifiable Map view of this list. [...]
override
cast<T>() List<T>
Provides a view of this iterable as an iterable of R instances. [...]
clear() → void
Removes all objects from this list; the length of the list becomes zero. [...]
override
contains(Object? element) bool
Whether the collection contains an element equal to element. [...]
inherited
elementAt(int index) → E
Returns the indexth element. [...]
inherited
every(bool test(E)) bool
Checks whether every element of this iterable satisfies test. [...]
inherited
expand<T>(Iterable<T> f(E)) Iterable<T>
Expands each element of this Iterable into zero or more elements. [...]
inherited
fillRange(int start, int end, [E? fillValue]) → void
Overwrites a range of elements with fillValue. [...]
override
firstWhere(bool test(E), {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 concatenation of this iterable and other. [...]
inherited
forEach(void f(E)) → void
Applies the function f to each element of this collection in iteration order.
inherited
getRange(int start, int end) Iterable<E>
Creates an Iterable that iterates over a range of elements. [...]
override
indexOf(E element, [int start = 0]) int
The first index of element in this list. [...]
override
indexWhere(bool test(E), [int start = 0]) int
The first index in the list that satisfies the provided test. [...]
override
insert(int index, E element) → void
Inserts element at position index in this list. [...]
override
insertAll(int index, Iterable<E> iterable) → void
Inserts all objects of iterable at position index in this list. [...]
override
join([String separator = '']) String
Converts each element to a String and concatenates the strings. [...]
inherited
lastIndexOf(E element, [int? start]) int
The last index of element in this list. [...]
override
lastIndexWhere(bool test(E), [int? start]) int
The last index in the list that satisfies the provided test. [...]
override
lastWhere(bool test(E), {E orElse()?}) → E
Returns the last element that satisfies the given predicate test. [...]
inherited
map<T>(T f(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
remove(Object? value) bool
Removes the first occurrence of value from this list. [...]
override
removeAt(int index) → E
Removes the object at position index from this list. [...]
override
removeLast() → E
Removes and returns the last object in this list. [...]
override
removeRange(int start, int end) → void
Removes a range of elements from the list. [...]
override
removeWhere(bool test(E)) → void
Removes all objects from this list that satisfy test. [...]
override
replaceRange(int start, int end, Iterable<E> iterable) → void
Replaces a range of elements with the elements of replacements. [...]
override
retainWhere(bool test(E)) → void
Removes all objects from this list that fail to satisfy test. [...]
override
retype<T>() List<T>
setAll(int index, Iterable<E> iterable) → void
Overwrites elements with the objects of iterable. [...]
override
setRange(int start, int end, Iterable<E> iterable, [int skipCount = 0]) → void
Writes some elements of iterable into a range of this list. [...]
override
shuffle([Random? random]) → void
Shuffles the elements of this list randomly.
override
singleWhere(bool test(E), {E orElse()?}) → E
Returns the single element that satisfies test. [...]
inherited
skip(int n) Iterable<E>
Returns an Iterable that provides all but the first count elements. [...]
inherited
skipWhile(bool test(E)) Iterable<E>
Returns an Iterable that skips leading elements while test is satisfied. [...]
inherited
sort([int compare(E, E)?]) → void
Sorts this list according to the order specified by the compare function. [...]
override
sublist(int start, [int? end]) List<E>
Returns a new list containing the elements between start and end. [...]
override
take(int n) Iterable<E>
Returns a lazy iterable of the count first elements of this iterable. [...]
inherited
takeWhile(bool test(E)) 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
A string representation of this object. [...]
inherited
where(bool test(E)) 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. [...]
override
operator ==(Object other) bool
The equality operator. [...]
inherited
operator [](int index) → E
The object at the given index in the list. [...]
override
operator []=(int index, E value) → void
Sets the value at the given index in the list to value. [...]
override

Static Methods

typed<E>(List base) List<E>
Creates a wrapper that asserts the types of values in base. [...]
@Deprecated('Use list.cast<E> instead.')