UnionSet<E> class

A single set that provides a view of the union over a set of sets.

Since this is just a view, it reflects all changes in the underlying sets.

If an element is in multiple sets and the outer set is ordered, the version in the earliest inner set is preferred. Component sets are assumed to use == and hashCode for equality.

Inheritance
Mixed-in types
Available extensions

Constructors

UnionSet(Set<Set<E>> sets, {bool disjoint = false})
Creates a new set that's a view of the union of all sets in sets.
UnionSet.from(Iterable<Set<E>> sets, {bool disjoint = false})
Creates a new set that's a view of the union of all sets in sets.

Properties

average → double

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

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

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

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

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

The first element, 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
genericType → Type

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

Returns the generic type of the 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
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>
An iterator that iterates over the elements of this set.
no setteroverride
last → E
The last element.
no setterinherited
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
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 elements in this Iterable.
no setteroverride
max → double

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

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

Available on Iterable<num>, provided by the IterableNumberExtension 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
max → T

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

A maximal element of the iterable.
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
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
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
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
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
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 → 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 → 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
nonNulls → Iterable<T>

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

The non-null elements of this iterable.
no setter
nonNulls → Iterable<T>

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

The non-null elements of this iterable.
no setter
nullIfEmpty → Iterable<T>?

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

Returns null if the Iterable is empty, otherwise returns the Iterable.
no setter
nullIfEmpty → Set<T>?

Available on Set<T>, provided by the NullIfEmptyOnSetX extension

Returns null if the Set is empty, otherwise returns the Set.
no setter
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 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 → int

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

The sum of the elements.
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
unmodifiable → Set<T>

Available on Set<T>, provided by the UnmodifiableOnSetX extension

no setter
wait → Future<List<T>>

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

Waits for futures in parallel.
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) → bool
Throws an UnsupportedError; operations that change the set are disallowed.
inherited
addAll(Iterable<E> elements) → void
Throws an UnsupportedError; operations that change the set are disallowed.
inherited
any(bool test(E element)) → bool
Checks whether any element of this iterable satisfies test.
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>() → Set<R>
Provides a view of this set as a set of R instances.
inherited
chunked(int chunkSize) → Iterable<Iterable<T>>

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

Splits the Iterable into chunks of a maximum size specified by chunkSize.
clear() → void
Throws an UnsupportedError; operations that change the set are disallowed.
inherited
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.
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
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) → T?

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

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

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

The indexth element, or null if there is no such element.
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
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.
firstWhere(bool test(E value), {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 f(E element)) → void
Invokes action on each element of this iterable in iteration order.
inherited
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, 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(T element)) → void

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

Takes an action for each element as long as desired.
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.
intersection(Set<Object?> other) → Set<E>
Creates a new set which is the intersection between this set and other.
inherited
isSorted([Comparator<T>? compare]) → bool

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

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

Available on Iterable<T>, provided by the IterableExtension 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
joinWithLastSeparator({String separator = ', ', String lastSeparator = ' & '}) → String

Available on Iterable, provided by the JoinWithLastSeparatorOnIterableX extension

Joins the elements of the iterable into a single string with the given separator and lastSeparator. The lastSeparator is used to join the last two elements of the iterable.
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.
lastWhere(bool test(E value), {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.
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.
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.
maybeAdd(Iterable<T>? add) → Iterable<T>?

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

Adds add to this its not null.
maybeAdd(Set<T>? add) → Set<T>

Available on Set<T>, provided by the MaybeAddToSetX extension

Adds add to this its not null.
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
powerset(T combinator(T a, T b)) → Iterable<T>

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

Returns the powerset of the Iterable using the provided combinator.
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
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? value) → bool
Throws an UnsupportedError; operations that change the set are disallowed.
inherited
removeAll(Iterable elements) → void
Throws an UnsupportedError; operations that change the set are disallowed.
inherited
removeWhere(bool test(E)) → void
Throws an UnsupportedError; operations that change the set are disallowed.
inherited
retainAll(Iterable elements) → void
Throws an UnsupportedError; operations that change the set are disallowed.
inherited
retainWhere(bool test(E)) → void
Throws an UnsupportedError; operations that change the set are disallowed.
inherited
sample(int count, [Random? random]) → List<T>

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

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

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

Creates a shuffled list of the elements of the iterable.
singleWhere(bool test(E value), {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 n) → Iterable<E>
Creates an Iterable that provides all but the first count elements.
inherited
skipWhile(bool test(E value)) → Iterable<E>
Creates an Iterable that skips leading elements while test is satisfied.
inherited
slices(int length) → Iterable<List<T>>

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

Contiguous slices of this with the given length.
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.
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.
take(int n) → Iterable<E>
Creates a lazy iterable of the count first elements of this iterable.
inherited
takeLast(int count) → Iterable<String>

Available on Iterable<String>, provided by the TakeLastOnIterableX extension

Takes the last count elements from the iterable.
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
toMap() → Map<K, V>

Available on Iterable<MapEntry<K, V>>, provided by the ToMapOnIterableX extension

Converts an iterable of MapEntry to a Map.
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
tryMerge([Iterable<T> merge(Iterable<T>?, Iterable<T>?)?]) → Iterable<T>?

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

Tries to merge the iterables, returning null if it fails.
tryReduce(T combine(T, T)) → T?

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

Tries to reduce the iterable, returning null if it fails.
union(Set<E> other) → Set<E>
Creates a new set which contains all the elements of this set and other.
inherited
unique([bool equals(T a, T b)?]) → Iterable<T>

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

Returns a new iterable with all duplicate elements removed.
uniqueEntries() → List<MapEntry<K, V>>

Available on Iterable<MapEntry<K, V>>, provided by the UniqueOnMapEntryIterableX extension

Returns only the unique entries in the iterable.
uniqueKeys() → List<MapEntry<K, V>>

Available on Iterable<MapEntry<K, V>>, provided by the UniqueOnMapEntryIterableX extension

Returns only the entries with unique keys in the iterable.
uniqueValues() → List<MapEntry<K, V>>

Available on Iterable<MapEntry<K, V>>, provided by the UniqueOnMapEntryIterableX extension

Returns only the entries with unique values in the iterable.
valueOf(String? value) → T?

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

Returns the first element or null if there are none.
where(bool f(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.
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, 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 ==(Object other) → bool
The equality operator.
inherited