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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.

Inheritance

Constructors

SetBase()

Properties

first → E
read-only, inherited
Returns the first element. [...]
hashCodeint
read-only, inherited
The hash code for this object. [...]
isEmptybool
read-only, inherited
Returns true if there are no elements in this collection. [...]
isNotEmptybool
read-only, inherited
Returns true if there is at least one element in this collection. [...]
iteratorIterator<E>
read-only, inherited
Provides an iterator that iterates over the elements of this set. [...]
last → E
read-only, inherited
Returns the last element. [...]
lengthint
read-only, inherited
Returns the number of elements in the iterable. [...]
runtimeTypeType
read-only, inherited
A representation of the runtime type of the object.
single → E
read-only, inherited
Checks that this iterable has only one element, and returns that element. [...]

Methods

add(E value) → bool
inherited
Adds value to the set. [...]
addAll(Iterable<E> elements) → void
inherited
Adds all elements to this Set. [...]
any(bool test(E element)) → bool
inherited
Checks whether any element of this iterable satisfies test. [...]
cast<R>() → Set<R>
inherited
Provides a view of this set as a set of R instances. [...]
clear() → void
inherited
Removes all elements in the set.
contains(Object element) → bool
inherited
Returns true if value is in the set.
containsAll(Iterable<Object> other) → bool
inherited
Returns whether this Set contains all the elements of other.
difference(Set<Object> other) → Set<E>
inherited
Returns a new set with the elements of this that are not in other. [...]
elementAt(int index) → E
inherited
Returns the indexth element. [...]
every(bool f(E element)) → bool
inherited
Checks whether every element of this iterable satisfies test. [...]
expand<T>(Iterable<T> f(E element)) → Iterable<T>
inherited
Expands each element of this Iterable into zero or more elements. [...]
firstWhere(bool test(E value), { E orElse() }) → E
inherited
Returns the first element that satisfies the given predicate test. [...]
fold<T>(T initialValue, T combine(T previousValue, E element)) → T
inherited
Reduces a collection to a single value by iteratively combining each element of the collection with an existing value [...]
followedBy(Iterable<E> other) → Iterable<E>
inherited
Returns the lazy concatentation of this iterable and other. [...]
forEach(void f(E element)) → void
inherited
Applies the function f to each element of this collection in iteration order.
intersection(Set<Object> other) → Set<E>
inherited
Returns a new set which is the intersection between this set and other. [...]
join([String separator = "" ]) → String
inherited
Converts each element to a String and concatenates the strings. [...]
lastWhere(bool test(E value), { E orElse() }) → E
inherited
Returns the last element that satisfies the given predicate test. [...]
lookup(Object element) → E
inherited
If an object equal to object is in the set, return it. [...]
map<T>(T f(E element)) → Iterable<T>
inherited
Returns a new lazy Iterable with elements that are created by calling f on each element of this Iterable in iteration order. [...]
noSuchMethod(Invocation invocation) → dynamic
inherited
Invoked when a non-existent method or property is accessed. [...]
reduce(E combine(E value, E element)) → E
inherited
Reduces a collection to a single value by iteratively combining elements of the collection using the provided function. [...]
remove(Object value) → bool
inherited
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.
removeAll(Iterable<Object> elements) → void
inherited
Removes each element of elements from this set.
removeWhere(bool test(E element)) → void
inherited
Removes all elements of this set that satisfy test.
retainAll(Iterable<Object> elements) → void
inherited
Removes all elements of this set that are not elements in elements. [...]
retainWhere(bool test(E element)) → void
inherited
Removes all elements of this set that fail to satisfy test.
singleWhere(bool test(E value), { E orElse() }) → E
inherited
Returns the single element that satisfies test. [...]
skip(int n) → Iterable<E>
inherited
Returns an Iterable that provides all but the first count elements. [...]
skipWhile(bool test(E value)) → Iterable<E>
inherited
Returns an Iterable that skips leading elements while test is satisfied. [...]
take(int n) → Iterable<E>
inherited
Returns a lazy iterable of the count first elements of this iterable. [...]
takeWhile(bool test(E value)) → Iterable<E>
inherited
Returns a lazy iterable of the leading elements satisfying test. [...]
toList({bool growable: true }) → List<E>
inherited
Creates a List containing the elements of this Iterable. [...]
toSet() → Set<E>
inherited
toString() → String
inherited
Returns a string representation of this object.
union(Set<E> other) → Set<E>
inherited
Returns a new set which contains all the elements of this set and other. [...]
where(bool f(E element)) → Iterable<E>
inherited
Returns a new lazy Iterable with all elements that satisfy the predicate test. [...]
whereType<T>() → Iterable<T>
inherited
Returns a new lazy Iterable with all elements that have type T. [...]

Operators

operator ==(dynamic other) → bool
inherited
The equality operator. [...]

Static Methods

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

© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/2.0.0/dart-collection/SetBase-class.html