DelegatingSet<E> class Null safety

A Set that delegates all operations to a base set.

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

Implemented types
Implementers
Available Extensions

Constructors

DelegatingSet(Set<E> base)
const

Properties

first → E
Returns the first element.
read-onlyinherited
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-onlyinherited
length int
Returns the number of elements in this.
read-onlyinherited
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) bool
Adds value to the set.
override
addAll(Iterable<E> elements) → void
Adds all elements to this set.
override
any(bool test(E)) bool
Checks whether any element of this iterable satisfies test.
inherited
cast<T>() Set<T>
Provides a view of this iterable as an iterable of R instances.
clear() → void
Removes all elements from the set.
override
contains(Object? element) bool
Whether the collection contains an element equal to element.
inherited
containsAll(Iterable<Object?> other) bool
Whether this set contains all the elements of other.
override
difference(Set<Object?> other) Set<E>
Creates a new set with the elements of this that are not in other.
override
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
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
intersection(Set<Object?> other) Set<E>
Creates a new set which is the intersection between this set and other.
override
join([String separator = '']) String
Converts each element to a String and concatenates the strings.
inherited
lastWhere(bool test(E), {E orElse()?}) → E
Returns the last element that satisfies the given predicate test.
inherited
lookup(Object? element) → E?
If an object equal to object is in the set, return it.
override
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 value from the set.
override
removeAll(Iterable<Object?> elements) → void
Removes each element of elements from this set.
override
removeWhere(bool test(E)) → void
Removes all elements of this set that satisfy test.
override
retainAll(Iterable<Object?> elements) → void
Removes all elements of this set that are not elements in elements.
override
retainWhere(bool test(E)) → void
Removes all elements of this set that fail to satisfy test.
override
retype<T>() Set<T>
@Deprecated("Use cast instead")
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
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.
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.
override
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 ==(Object other) bool
The equality operator.
inherited

Static Methods

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