lrn@google.com
ee569ce10a
Previous commit was reverted due to hitting an unrelated error. TBR=ahe@google.com Review URL: https://codereview.chromium.org//10939030 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@12551 260f80e4-7a28-3924-810f-c04153c831b5
81 lines
2.0 KiB
Dart
81 lines
2.0 KiB
Dart
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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/**
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* This class is the public interface of a set. A set is a collection
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* without duplicates.
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*/
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abstract class Set<E> extends Collection<E> {
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factory Set() => new HashSetImplementation<E>();
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/**
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* Creates a [Set] that contains all elements of [other].
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*/
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factory Set.from(Iterable<E> other) {
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return new HashSetImplementation<E>.from(other);
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}
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/**
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* Returns true if [value] is in the set.
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*/
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bool contains(E value);
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/**
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* Adds [value] into the set. The method has no effect if
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* [value] was already in the set.
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*/
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void add(E value);
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/**
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* Removes [value] from the set. Returns true if [value] was
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* in the set. Returns false otherwise. The method has no effect
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* if [value] value was not in the set.
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*/
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bool remove(E value);
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/**
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* Adds all the elements of the given collection to the set.
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*/
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void addAll(Collection<E> collection);
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/**
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* Removes all the elements of the given collection from the set.
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*/
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void removeAll(Collection<E> collection);
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/**
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* Returns true if [collection] contains all the elements of this
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* collection.
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*/
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bool isSubsetOf(Collection<E> collection);
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/**
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* Returns true if this collection contains all the elements of
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* [collection].
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*/
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bool containsAll(Collection<E> collection);
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/**
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* Returns a new set which is the intersection between this set and
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* the given collection.
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*/
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Set<E> intersection(Collection<E> other);
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/**
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* Removes all elements in the set.
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*/
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void clear();
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}
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abstract class HashSet<E extends Hashable> extends Set<E> {
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factory HashSet() => new HashSetImplementation<E>();
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/**
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* Creates a [Set] that contains all elements of [other].
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*/
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factory HashSet.from(Iterable<E> other) =>
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new HashSetImplementation<E>.from(other);
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}
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