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 / writeinherited-getteroverride-setter
hashCode → int
The hash code for this object.
read-onlyinherited
isEmpty → bool
Whether this collection has no elements.
read-onlyinherited
isNotEmpty → bool
Whether this collection has at least one element.
read-onlyinherited
iterator → Iterator<E>
Returns a new Iterator that allows iterating the elements of this Iterable.
read-onlyinherited
last ↔ E
Returns the last element.
read / writeinherited-getteroverride-setter
length ↔ int
Returns the number of elements in this.
read / writeinherited-getteroverride-setter
reversed → Iterable<E>
An Iterable of the objects in this list in reverse order.
read-onlyoverride
runtimeType → Type
A representation of the runtime type of the object.
read-onlyinherited
single → E
Checks that this iterable has only one element, and returns that element.
read-onlyinherited

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
Invokes action on each element of this iterable 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>
The current elements of this iterable modified by toElement.
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>
Deprecated("Use cast instead")">@Deprecated("Use cast instead")
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.')">@Deprecated('Use list.cast<E> instead.')