UnmodifiableSetView<E> class
An unmodifiable Set view of another Set.
Methods that could change the set, such as add and remove,
must not be called.
final baseSet = <String>{'Mars', 'Mercury', 'Earth', 'Venus'};
final unmodifiableSetView = UnmodifiableSetView(baseSet);
// Remove an element from the original set.
baseSet.remove('Venus');
print(unmodifiableSetView); // {Mars, Mercury, Earth}
unmodifiableSetView.remove('Earth'); // Throws.
- Inheritance
- Available Extensions
- Annotations
-
- @Since("2.12")
Constructors
-
UnmodifiableSetView(Set<
E> source) -
Creates an UnmodifiableSetView of
source.
Properties
- first → E
-
The first element.
no setterinherited
- hashCode → int
-
The hash code for this object.
no setterinherited
- 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> -
An iterator that iterates over the elements of this set.
no setteroverride
- last → E
-
The last element.
no setterinherited
- length → int
-
The number of elements in this Iterable.
no setteroverride
- 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
Methods
-
add(
E value) → bool -
This operation is not supported by an unmodifiable set.
inherited
-
addAll(
Iterable< E> elements) → void -
This operation is not supported by an unmodifiable set.
inherited
-
any(
bool test(E element)) → bool -
Checks whether any element of this iterable satisfies
test.inherited -
cast<
R> () → Set< R> -
Provides a view of this set as a set of
Rinstances.inherited -
clear(
) → void -
This operation is not supported by an unmodifiable set.
inherited
-
contains(
Object? element) → bool -
Whether
valueis in the set.override -
containsAll(
Iterable< Object?> other) → bool -
Whether this set contains all the elements of
other.inherited -
difference(
Set< Object?> other) → Set<E> -
Creates a new set with the elements of this that are not in
other.inherited -
elementAt(
int index) → E -
Returns the
indexth element.inherited -
every(
bool f(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
-
firstWhere(
bool test(E value), {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 f(E element)) → void -
Invokes
actionon each element of this iterable in iteration order.inherited -
intersection(
Set< Object?> other) → Set<E> -
Creates a new set which is the intersection between this set and
other.inherited -
join(
[String separator = ""]) → String -
Converts each element to a String and concatenates the strings.
inherited
-
lastWhere(
bool test(E value), {E orElse()?}) → E -
The last element that satisfies the given predicate
test.inherited -
lookup(
Object? element) → E? -
If an object equal to
objectis in the set, return it.override -
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 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 -
This operation is not supported by an unmodifiable set.
inherited
-
removeAll(
Iterable< Object?> elements) → void -
This operation is not supported by an unmodifiable set.
inherited
-
removeWhere(
bool test(E element)) → void -
This operation is not supported by an unmodifiable set.
inherited
-
retainAll(
Iterable< Object?> elements) → void -
This operation is not supported by an unmodifiable set.
inherited
-
retainWhere(
bool test(E element)) → void -
This operation is not supported by an unmodifiable set.
inherited
-
singleWhere(
bool test(E value), {E orElse()?}) → E -
The single element that satisfies
test.inherited -
skip(
int n) → Iterable< E> -
Creates an Iterable that provides all but the first
countelements.inherited -
skipWhile(
bool test(E value)) → Iterable< E> -
Creates an
Iterablethat skips leading elements whiletestis satisfied.inherited -
take(
int n) → Iterable< E> -
Creates a lazy iterable of the
countfirst elements of this iterable.inherited -
takeWhile(
bool test(E value)) → 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 with the same elements and behavior as this
Set.override -
toString(
) → String -
A string representation of this object.
inherited
-
union(
Set< E> other) → Set<E> -
Creates a new set which contains all the elements of this set and
other.inherited -
where(
bool f(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 ==(
Object other) → bool -
The equality operator.
inherited