SetMixin<E> class Null safety

Mixin implementation of Set.

This class provides a base implementation of a Set that depends only on the abstract members: add, contains, lookup, remove, iterator, length and toSet.

Some of the methods assume that toSet creates a modifiable set. If using this mixin for an unmodifiable set, where toSet should return an unmodifiable set, it's necessary to reimplement retainAll, union, intersection and difference.

Implementations of Set using this mixin should consider also implementing clear in constant time. The default implementation works by removing every element.

Implemented types
Implementers
Available Extensions

Constructors

SetMixin()

Properties

first → E
Returns the first element.
read-only, override
hashCode → int
The hash code for this object.
read-only, inherited
isEmpty → bool
Whether this collection has no elements.
read-only, override
isNotEmpty → bool
Whether this collection has at least one element.
read-only, override
iterator → Iterator<E>
An iterator that iterates over the elements of this set.
read-only, override
last → E
Returns the last element.
read-only, override
length → int
Returns the number of elements in the iterable.
read-only
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited
single → E
Checks that this iterable has only one element, and returns that element.
read-only, override

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 element)) → bool
Checks whether any element of this iterable satisfies test.
override
cast<R>() → Set<R>
Provides a view of this set as a set of R instances.
override
clear() → void
Removes all elements from the set.
override
contains(Object? element) → bool
Whether value is in the set.
override
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.
override
every(bool f(E element)) → bool
Checks whether every element of this iterable satisfies test.
override
expand<T>(Iterable<T> f(E element)) → Iterable<T>
Expands each element of this Iterable into zero or more elements.
override
firstWhere(bool test(E value), {E orElse()?}) → E
Returns the first element that satisfies the given predicate test.
override
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
override
followedBy(Iterable<E> other) → Iterable<E>
Returns the lazy concatenation of this iterable and other.
override
forEach(void f(E element)) → void
Invokes action on each element of this iterable in iteration order.
override
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.
override
lastWhere(bool test(E value), {E orElse()?}) → E
Returns the last element that satisfies the given predicate test.
override
lookup(Object? element) → E?
If an object equal to object is in the set, return it.
override
map<T>(T f(E element)) → Iterable<T>
The current elements of this iterable modified by toElement.
override
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.
override
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 element)) → 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 element)) → void
Removes all elements of this set that fail to satisfy test.
override
singleWhere(bool test(E value), {E orElse()?}) → E
Returns the single element that satisfies test.
override
skip(int n) → Iterable<E>
Returns an Iterable that provides all but the first count elements.
override
skipWhile(bool test(E value)) → Iterable<E>
Returns an Iterable that skips leading elements while test is satisfied.
override
take(int n) → Iterable<E>
Returns a lazy iterable of the count first elements of this iterable.
override
takeWhile(bool test(E value)) → Iterable<E>
Returns a lazy iterable of the leading elements satisfying test.
override
toList({bool growable = true}) → List<E>
Creates a List containing the elements of this Iterable.
override
toSet() → Set<E>
Creates a Set with the same elements and behavior as this Set.
override
toString() → String
A string representation of this object.
override
union(Set<E> other) → Set<E>
Creates a new set which contains all the elements of this set and other.
override
where(bool f(E element)) → Iterable<E>
Returns a new lazy Iterable with all elements that satisfy the predicate test.
override
whereType<T>() → Iterable<T>
Returns a new lazy Iterable with all elements that have type T.
override

Operators

operator ==(Object other) → bool
The equality operator.
inherited