Dart
dart:collection
SetBase<E> abstract class

SetBase<E> class

Base 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 base class 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 base should consider also implementing clear in constant time. The default implementation works by removing every element.

Mixed in types

SetMixin<E>

Constructors

SetBase()

Properties

first → E: Returns the first element. [...]
read-only, inherited
hashCode → int: The hash code for this object. [...]
read-only, inherited
isEmpty → bool: Returns true if there are no elements in this collection. [...]
read-only, inherited
isNotEmpty → bool: Returns true if there is at least one element in this collection. [...]
read-only, inherited
iterator → Iterator<E>: Provides an iterator that iterates over the elements of this set. [...]
read-only, inherited
last → E: Returns the last element. [...]
read-only, inherited
length → int: Returns the number of elements in the iterable. [...]
read-only, inherited
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, inherited

Methods

add(E value) → bool: Adds value to the set. [...]
inherited
addAll(Iterable<E> elements) → void: Adds all elements to this 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 R instances. [...]
inherited
clear() → void: Removes all elements in the set.
inherited
contains(Object element) → bool: Returns true if value is in the set.
inherited
containsAll(Iterable<Object> other) → bool: Returns whether this Set contains all the elements of other.
inherited
difference(Set<Object> other) → Set<E>: Returns 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: 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 concatentation of this iterable and other. [...]
inherited
forEach(void f(E element)) → void: Applies the function f to each element of this collection in iteration order.
inherited
intersection(Set<Object> other) → Set<E>: Returns 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: 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. [...]
inherited
map<T>(T f(E element)) → Iterable<T>: Returns a new lazy Iterable with elements that are created by calling f on each element of this Iterable in iteration order. [...]
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. Returns true if value was in the set. Returns false otherwise. The method has no effect if value value was not in the set.
inherited
removeAll(Iterable<Object> elements) → void: Removes each element of elements from this set.
inherited
removeWhere(bool test(E element)) → void: Removes all elements of this set that satisfy test.
inherited
retainAll(Iterable<Object> elements) → void: Removes all elements of this set that are not elements in elements. [...]
inherited
retainWhere(bool test(E element)) → void: Removes all elements of this set that fail to satisfy test.
inherited
singleWhere(bool test(E value), { 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 value)) → 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 value)) → 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. [...]
inherited
toString() → String: Returns a string representation of this object.
inherited
union(Set<E> other) → Set<E>: Returns a new set which contains all the elements of this set and other. [...]
inherited
where(bool f(E element)) → 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 ==(dynamic other) → bool: The equality operator. [...]
inherited

Static Methods

setToString(Set set) → String: Convert a Set to a string as {each, element, as, string}. [...]