description

# UnmodifiableListView<E> class

An unmodifiable List view of another List.

The source of the elements may be a List or any Iterable with efficient Iterable.length and Iterable.elementAt.

    final numbers = <int>[10, 20, 30];
    final unmodifiableListView = UnmodifiableListView(numbers);

    // Insert new elements into the original list.
    numbers.addAll([40, 50]);
    print(unmodifiableListView); // [10, 20, 30, 40, 50]

    unmodifiableListView.remove(20); // Throws.

Inheritance
  - Object
  - ListBase<E>
  - UnmodifiableListView
Implemented types
  - List<E>
Available extensions
  - EnumByName
  - FutureIterable
  - IterableExtensions
  - IterableToJSIterable
  - ListToJSArray
  - NullableIterableExtensions

## Constructors

UnmodifiableListView(Iterable<E> source)
  Creates an unmodifiable list backed by `source`.

## Properties

first ↔ E
  The first element.
  getter/setter pairinherited
firstOrNull → T?

  Available on Iterable<T>, provided by the IterableExtensions extension

  The first element of this iterator, or `null` if the iterable is empty.
  no setter
hashCode → int
  The hash code for this object.
  no setterinherited
indexed → Iterable<(int, T)>

  Available on Iterable<T>, provided by the IterableExtensions extension

  Pairs of elements of the indices and elements of this iterable.
  no setter
isEmpty → bool
  Whether this collection has no elements.
  no setterinherited
isNotEmpty → bool
  Whether this collection has at least one element.
  no setterinherited
iterator → Iterator<E>
  A new `Iterator` that allows iterating the elements of this `Iterable`.
  no setterinherited
last ↔ E
  The last element.
  getter/setter pairinherited
lastOrNull → T?

  Available on Iterable<T>, provided by the IterableExtensions extension

  The last element of this iterable, or `null` if the iterable is empty.
  no setter
length ↔ int
  The number of objects in this list.
  getter/setter pairinherited-setteroverride-getter
nonNulls → Iterable<T>

  Available on Iterable<T?>, provided by the NullableIterableExtensions extension

  The non-`null` elements of this iterable.
  no setter
reversed → Iterable<E>
  An Iterable of the objects in this list in reverse order.
  no setterinherited
runtimeType → Type
  A representation of the runtime type of the object.
  no setterinherited
single → E
  Checks that this iterable has only one element, and returns that element.
  no setterinherited
singleOrNull → T?

  Available on Iterable<T>, provided by the IterableExtensions extension

  The single element of this iterator, or `null`.
  no setter
toJS → JSArray<T>

  Available on List<T>, provided by the ListToJSArray extension

  Converts this List to a JSArray by either casting, unwrapping, or cloning the List.
  no setter
toJSIterable → JSIterable<T>

  Available on Iterable<T>, provided by the IterableToJSIterable extension

  A JSIterable wrapper that proxies to the Dart iterable API.
  no setter
toJSProxyOrRef → JSArray<T>

  Available on List<T>, provided by the ListToJSArray extension

  Converts this List to a JSArray by either casting, unwrapping, or proxying the List.
  no setter
wait → Future<List<T>>

  Available on Iterable<Future<T>>, provided by the FutureIterable extension

  Waits for futures in parallel.
  no setter

## Methods

add(E value) → void
  This operation is not supported by an unmodifiable list.
  inherited
addAll(Iterable<E> iterable) → void
  This operation is not supported by an unmodifiable list.
  inherited
any(bool test(E element)) → bool
  Checks whether any element of this iterable satisfies `test`.
  inherited
asMap() → Map<int, E>
  An unmodifiable Map view of this list.
  inherited
asNameMap() → Map<String, T>

  Available on Iterable<T>, provided by the EnumByName extension

  Creates a map from the names of enum values to the values.
byName(String name) → T

  Available on Iterable<T>, provided by the EnumByName extension

  Finds the enum value in this list with name `name`.
cast<R>() → List<R>
  Returns a view of this list as a list of `R` instances.
  override
clear() → void
  This operation is not supported by an unmodifiable list.
  inherited
contains(Object? element) → bool
  Whether the collection contains an element equal to `element`.
  inherited
elementAt(int index) → E
  Returns the `index`th element.
  inherited
elementAtOrNull(int index) → T?

  Available on Iterable<T>, provided by the IterableExtensions extension

  The element at position `index` of this iterable, or `null`.
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? fillValue]) → void
  This operation is not supported by an unmodifiable list.
  inherited
firstWhere(bool test(E element), {E orElse()?}) → E
  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>
  Creates the lazy concatenation of this iterable and `other`.
  inherited
forEach(void action(E value)) → 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.
  inherited
indexOf(Object? element, [int start = 0]) → int
  The first index of `element` in this list.
  inherited
indexWhere(bool test(E element), [int start = 0]) → int
  The first index in the list that satisfies the provided `test`.
  inherited
insert(int index, E element) → void
  This operation is not supported by an unmodifiable list.
  inherited
insertAll(int at, Iterable<E> iterable) → void
  This operation is not supported by an unmodifiable list.
  inherited
join([String separator = ""]) → String
  Converts each element to a String and concatenates the strings.
  inherited
lastIndexOf(Object? element, [int? start]) → int
  The last index of `element` in this list.
  inherited
lastIndexWhere(bool test(E element), [int? start]) → int
  The last index in the list that satisfies the provided `test`.
  inherited
lastWhere(bool test(E element), {E orElse()?}) → E
  The last element that satisfies the given predicate `test`.
  inherited
map<T>(T f(E element)) → Iterable<T>
  The current elements of this iterable modified by `toElement`.
  inherited
noSuchMethod(Invocation invocation) → dynamic
  Invoked when a nonexistent 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
  This operation is not supported by an unmodifiable list.
  inherited
removeAt(int index) → E
  This operation is not supported by an unmodifiable list.
  inherited
removeLast() → E
  This operation is not supported by an unmodifiable list.
  inherited
removeRange(int start, int end) → void
  This operation is not supported by an unmodifiable list.
  inherited
removeWhere(bool test(E element)) → void
  This operation is not supported by an unmodifiable list.
  inherited
replaceRange(int start, int end, Iterable<E> iterable) → void
  This operation is not supported by an unmodifiable list.
  inherited
retainWhere(bool test(E element)) → void
  This operation is not supported by an unmodifiable list.
  inherited
setAll(int at, Iterable<E> iterable) → void
  This operation is not supported by an unmodifiable list.
  inherited
setRange(int start, int end, Iterable<E> iterable, [int skipCount = 0]) → void
  This operation is not supported by an unmodifiable list.
  inherited
shuffle([Random? random]) → void
  This operation is not supported by an unmodifiable list.
  inherited
singleWhere(bool test(E element), {E orElse()?}) → E
  The single element that satisfies `test`.
  inherited
skip(int count) → Iterable<E>
  Creates an Iterable that provides all but the first `count` elements.
  inherited
skipWhile(bool test(E element)) → Iterable<E>
  Creates an `Iterable` that skips leading elements while `test` is satisfied.
  inherited
sort([Comparator<E>? compare]) → void
  This operation is not supported by an unmodifiable list.
  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>
  Creates a lazy iterable of the `count` first elements of this iterable.
  inherited
takeWhile(bool test(E element)) → Iterable<E>
  Creates 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 element)) → Iterable<E>
  Creates a new lazy Iterable with all elements that satisfy the predicate `test`.
  inherited
whereType<T>() → Iterable<T>
  Creates 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
  The object at the given `index` in the list.
  override
operator []=(int index, E value) → void
  This operation is not supported by an unmodifiable list.
  inherited