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
Implemented types
Implementers
Available extensions

Constructors

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

Properties

average → double

Available on Iterable<int>, provided by the IterableIntegerExtension extension

The arithmetic mean of the elements of a non-empty iterable.
no setter
average → double

Available on Iterable<num>, provided by the IterableNumberExtension extension

The arithmetic mean of the elements of a non-empty iterable.
no setter
first ↔ E
The first element.
getter/setter pairinherited
firstOrNull → T?

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

The first element, or null if the iterable is empty.
no setter
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
flattened → Iterable<T>

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

The sequential elements of each iterable in this iterable.
no setter
flattenedToList → List<T>

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

The sequential elements of each iterable in this iterable.
no setter
flattenedToSet → Set<T>

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

The unique sequential elements of each iterable in this iterable.
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 IterableExtension extension

The last element, or null if the iterable is empty.
no setter
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
max → num

Available on Iterable<num>, provided by the IterableNumberExtension extension

A maximal element of the iterable.
no setter
max → T

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

A maximal element of the iterable.
no setter
max → double

Available on Iterable<double>, provided by the IterableDoubleExtension extension

A maximal element of the iterable.
no setter
max → int

Available on Iterable<int>, provided by the IterableIntegerExtension extension

A maximal element of the iterable.
no setter
maxOrNull → int?

Available on Iterable<int>, provided by the IterableIntegerExtension extension

A maximal element of the iterable, or null if the iterable is empty.
no setter
maxOrNull → double?

Available on Iterable<double>, provided by the IterableDoubleExtension extension

A maximal element of the iterable, or null if the iterable is empty.
no setter
maxOrNull → T?

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

A maximal element of the iterable, or null if the iterable is empty.
no setter
maxOrNull → num?

Available on Iterable<num>, provided by the IterableNumberExtension extension

A maximal element of the iterable, or null if the iterable is empty.
no setter
min → num

Available on Iterable<num>, provided by the IterableNumberExtension extension

A minimal element of the iterable.
no setter
min → double

Available on Iterable<double>, provided by the IterableDoubleExtension extension

A minimal element of the iterable.
no setter
min → int

Available on Iterable<int>, provided by the IterableIntegerExtension extension

A minimal element of the iterable.
no setter
min → T

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

A minimal element of the iterable.
no setter
minOrNull → num?

Available on Iterable<num>, provided by the IterableNumberExtension extension

A minimal element of the iterable, or null it the iterable is empty.
no setter
minOrNull → T?

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

A minimal element of the iterable, or null it the iterable is empty.
no setter
minOrNull → int?

Available on Iterable<int>, provided by the IterableIntegerExtension extension

A minimal element of the iterable, or null it the iterable is empty.
no setter
minOrNull → double?

Available on Iterable<double>, provided by the IterableDoubleExtension extension

A minimal element of the iterable, or null it the iterable is empty.
no setter
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
singleOrNull → T?

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

The single element of the iterable, or null.
no setter
sum → double

Available on Iterable<double>, provided by the IterableDoubleExtension extension

The sum of the elements.
no setter
sum → num

Available on Iterable<num>, provided by the IterableNumberExtension extension

The sum of the elements.
no setter
sum → int

Available on Iterable<int>, provided by the IterableIntegerExtension extension

The sum of the elements.
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
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.
binarySearch(E element, int compare(E, E)) → int

Available on List<E>, provided by the ListExtensions extension

Returns the index of element in this sorted list.
binarySearch(E element, [int compare(E, E)?]) → int

Available on List<E>, provided by the ListComparableExtensions extension

Returns the index of element in this sorted list.
binarySearchBy<K extends Comparable<K>>(E element, K keyOf(E element), [int start = 0, int? end]) → int

Available on List<E>, provided by the ListExtensions extension

Returns the index of element in this sorted list.
binarySearchByCompare<K>(E element, K keyOf(E element), int compare(K, K), [int start = 0, int? end]) → int

Available on List<E>, provided by the ListExtensions extension

Returns the index of element in this sorted list.
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 indexth element.
inherited
elementAtOrNull(int index) → T?

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

The indexth element, or null if there is no such element.
elementAtOrNull(int index) → T?

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

The element at position index of this iterable, or null.
elementAtOrNull(int index) → E?

Available on List<E>, provided by the ListExtensions extension

The indexth element, or null if there is no such element.
equals(List<E> other, [Equality<E> equality = const DefaultEquality()]) → bool

Available on List<E>, provided by the ListExtensions extension

Whether other has the same elements as this list.
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
expandIndexed<R>(Iterable<R> expand(int index, E element)) → Iterable<R>

Available on List<E>, provided by the ListExtensions extension

Expands each element and index to a number of elements in a new iterable.
expandIndexed<R>(Iterable<R> expand(int index, T element)) → Iterable<R>

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

Expands each element and index to a number of elements in a new iterable.
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
firstWhereIndexedOrNull(bool test(int index, T element)) → T?

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

The first element whose value and index satisfies test.
firstWhereOrNull(bool test(T element)) → T?

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

The first element satisfying test, or null if there are none.
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
foldIndexed<R>(R initialValue, R combine(int index, R previous, T element)) → R

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

Combine the elements with a value and the current index.
followedBy(Iterable<E> other) → Iterable<E>
Creates the lazy concatenation of this iterable and other.
inherited
forEach(void action(E element)) → void
Invokes action on each element of this iterable in iteration order.
inherited
forEachIndexed(void action(int index, E element)) → void

Available on List<E>, provided by the ListExtensions extension

Takes an action for each element.
forEachIndexed(void action(int index, T element)) → void

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

Takes an action for each element.
forEachIndexedWhile(bool action(int index, E element)) → void

Available on List<E>, provided by the ListExtensions extension

Takes an action for each element and index as long as desired.
forEachIndexedWhile(bool action(int index, T element)) → void

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

Takes an action for each element and index as long as desired.
forEachWhile(bool action(E element)) → void

Available on List<E>, provided by the ListExtensions extension

Takes an action for each element as long as desired.
forEachWhile(bool action(T element)) → void

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

Takes an action for each element as long as desired.
getRange(int start, int end) → Iterable<E>
Creates an Iterable that iterates over a range of elements.
inherited
groupFoldBy<K, G>(K keyOf(T element), G combine(G? previous, T element)) → Map<K, G>

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

Groups elements by keyOf then folds the elements in each group.
groupListsBy<K>(K keyOf(T element)) → Map<K, List<T>>

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

Groups elements into lists by keyOf.
groupSetsBy<K>(K keyOf(T element)) → Map<K, Set<T>>

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

Groups elements into sets by keyOf.
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
isSorted(Comparator<T> compare) → bool

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

Whether the elements are sorted by the compare ordering.
isSorted([Comparator<T>? compare]) → bool

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

Whether the elements are sorted by the compare ordering.
isSortedBy<K extends Comparable<K>>(K keyOf(T element)) → bool

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

Whether the elements are sorted by their keyOf property.
isSortedByCompare<K>(K keyOf(T element), Comparator<K> compare) → bool

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

Whether the elements are compare-sorted by their keyOf property.
join([String separator = ""]) → String
Converts each element to a String and concatenates the strings.
inherited
lastBy<K>(K key(T)) → Map<K, T>

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

Associates the elements in this by the value returned by key.
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
lastWhereIndexedOrNull(bool test(int index, T element)) → T?

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

The last element whose index and value satisfies test.
lastWhereOrNull(bool test(T element)) → T?

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

The last element satisfying test, or null if there are none.
lowerBound(E element, int compare(E, E)) → int

Available on List<E>, provided by the ListExtensions extension

Returns the index where element should be in this sorted list.
lowerBound(E element, [int compare(E, E)?]) → int

Available on List<E>, provided by the ListComparableExtensions extension

Returns the index where element should be in this sorted list.
lowerBoundBy<K extends Comparable<K>>(E element, K keyOf(E), [int start = 0, int? end]) → int

Available on List<E>, provided by the ListExtensions extension

Returns the index where element should be in this sorted list.
lowerBoundByCompare<K>(E element, K keyOf(E), int compare(K, K), [int start = 0, int? end]) → int

Available on List<E>, provided by the ListExtensions extension

Returns the index where element should be in this sorted list.
map<T>(T f(E element)) → Iterable<T>
The current elements of this iterable modified by toElement.
inherited
mapIndexed<R>(R convert(int index, T element)) → Iterable<R>

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

Maps each element and its index to a new value.
mapIndexed<R>(R convert(int index, E element)) → Iterable<R>

Available on List<E>, provided by the ListExtensions extension

Maps each element and its index to a new value.
none(bool test(T)) → bool

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

Whether no element satisfies test.
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
reduceIndexed(T combine(int index, T previous, T element)) → T

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

Combine the elements with each other and the current index.
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
reverseRange(int start, int end) → void

Available on List<E>, provided by the ListExtensions extension

Reverses the elements in a range of the list.
sample(int count, [Random? random]) → List<T>

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

Selects count elements at random from this iterable.
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
shuffled([Random? random]) → List<T>

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

Creates a shuffled list of the elements of the iterable.
shuffleRange(int start, int end, [Random? random]) → void

Available on List<E>, provided by the ListExtensions extension

Shuffle a range of elements.
singleWhere(bool test(E element), {E orElse()?}) → E
The single element that satisfies test.
inherited
singleWhereIndexedOrNull(bool test(int index, T element)) → T?

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

The single element satisfying test.
singleWhereOrNull(bool test(T element)) → T?

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

The single element satisfying test.
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
slice(int start, [int? end]) → ListSlice<E>

Available on List<E>, provided by the ListExtensions extension

A fixed length view of a range of this list.
slices(int length) → Iterable<List<T>>

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

Contiguous slices of this with the given length.
slices(int length) → Iterable<List<E>>

Available on List<E>, provided by the ListExtensions extension

Contiguous slices of this with the given length.
sort([Comparator<E>? compare]) → void
This operation is not supported by an unmodifiable list.
inherited
sortBy<K extends Comparable<K>>(K keyOf(E element), [int start = 0, int? end]) → void

Available on List<E>, provided by the ListExtensions extension

Sorts elements by the natural order of their keyOf property.
sortByCompare<K>(K keyOf(E element), int compare(K a, K b), [int start = 0, int? end]) → void

Available on List<E>, provided by the ListExtensions extension

Sorts elements by the compare of their keyOf property.
sorted(Comparator<T> compare) → List<T>

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

Creates a sorted list of the elements of the iterable.
sorted([Comparator<T>? compare]) → List<T>

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

Creates a sorted list of the elements of the iterable.
sortedBy<K extends Comparable<K>>(K keyOf(T element)) → List<T>

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

Creates a sorted list of the elements of the iterable.
sortedByCompare<K>(K keyOf(T element), Comparator<K> compare) → List<T>

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

Creates a sorted list of the elements of the iterable.
sortRange(int start, int end, [int compare(E a, E b)?]) → void

Available on List<E>, provided by the ListComparableExtensions extension

Sort a range of elements by compare.
sortRange(int start, int end, int compare(E a, E b)) → void

Available on List<E>, provided by the ListExtensions extension

Sort a range of elements by compare.
splitAfter(bool test(T element)) → Iterable<List<T>>

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

Splits the elements into chunks after some elements.
splitAfterIndexed(bool test(int index, T element)) → Iterable<List<T>>

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

Splits the elements into chunks after some elements and indices.
splitBefore(bool test(T element)) → Iterable<List<T>>

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

Splits the elements into chunks before some elements.
splitBeforeIndexed(bool test(int index, T element)) → Iterable<List<T>>

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

Splits the elements into chunks before some elements and indices.
splitBetween(bool test(T first, T second)) → Iterable<List<T>>

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

Splits the elements into chunks between some elements.
splitBetweenIndexed(bool test(int index, T first, T second)) → Iterable<List<T>>

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

Splits the elements into chunks between some elements and indices.
sublist(int start, [int? end]) → List<E>
Returns a new list containing the elements between start and end.
inherited
swap(int index1, int index2) → void

Available on List<E>, provided by the ListExtensions extension

Swaps two elements of this list.
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
whereIndexed(bool test(int index, T element)) → Iterable<T>

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

The elements whose value and index satisfies test.
whereIndexed(bool test(int index, E element)) → Iterable<E>

Available on List<E>, provided by the ListExtensions extension

The elements whose value and index satisfies test.
whereNot(bool test(T element)) → Iterable<T>

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

The elements that do not satisfy test.
whereNotIndexed(bool test(int index, E element)) → Iterable<E>

Available on List<E>, provided by the ListExtensions extension

The elements whose value and index do not satisfy test.
whereNotIndexed(bool test(int index, T element)) → Iterable<T>

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

The elements whose value and index do not satisfy test.
whereNotNull() → Iterable<T>

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

The non-null elements of this Iterable.
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