Scala Library
scala.collection.mutable

trait Set
[source: scala/collection/mutable/Set.scala]
@cloneable

trait Set[A]
extends Set[A] with Scriptable[Message[A]] with CloneableCollection
This class represents mutable sets. Concrete set implementations just have to provide functionality for the abstract methods in scala.collection.Set as well as for +=, -= and clear.
Author
Matthias Zenger
Version
1.1, 09/05/2004
Direct Known Subclasses:
Set, BitSet, HashSet, ImmutableSetAdaptor, JavaSetAdaptor, LinkedHashSet, ObservableSet, SetProxy, SynchronizedSet, ListView.selection.Indices, Table.selection.SelectionSet
Method Summary
def + (elem : A) : Set[A]
Add a new element to the set.
def + (elem1 : A, elem2 : A, elems : A*) : Set[A]
Add two or more elements to this set.
def ++ (elems : Iterator[A]) : Set[A]
Add all the elements provided by an iterator elems to the set.
def ++ (elems : Iterable[A]) : Set[A]
Add all the elements provided by an iterator of the iterable object elems to the set.
def ++= (elems : Iterator[A]) : Unit
Add all the elements provided by an iterator elems to the set.
def ++= (elems : Iterable[A]) : Unit
Add all the elements provided by an iterator of the iterable object that to the set.
def += (elem1 : A, elem2 : A, elems : A*) : Unit
Add two or more elements to this set.
abstract def += (elem : A) : Unit
Add a new element to the set.
def - (elem1 : A, elem2 : A, elems : A*) : Set[A]
Remove two or more elements from this set.
def - (elem : A) : Set[A]
Remove a new element from the set.
def -- (elems : Iterator[A]) : Set[A]
Remove all the elements provided by an iterator elems from the set.
def -- (elems : Iterable[A]) : Set[A]
Remove all the elements provided by an iterator of the iterable object elems from the set.
def --= (elems : Iterable[A]) : Unit
Remove all the elements provided by an iterator of the iterable object elems from the set.
def --= (elems : Iterator[A]) : Unit
Remove all the elements provided by an iterator elems from the set.
def -= (elem1 : A, elem2 : A, elems : A*) : Unit
Remove two or more elements from this set.
abstract def -= (elem : A) : Unit
Removes a single element from a set.
def << (cmd : Message[A]) : Unit
Send a message to this scriptable object.
def clear : Unit
Removes all elements from the set. After this operation is completed, the set will be empty.
override def clone : Set[A]
Return a clone of this set.
def excl (elems : A*) : Unit
excl removes many elements from the set.
def incl (elems : A*) : Unit
incl can be used to add many elements to the set at the same time.
def intersect (that : Set[A]) : Unit
This method computes an intersection with set that. It removes all the elements that are not present in that.
def readOnly : Set[A]
Return a read-only projection of this set
def retain (p : (A) => Boolean) : Unit
Method retain removes all elements from the set for which the predicate p yields the value false.
def update (elem : A, included : Boolean) : Unit
This method allows one to add or remove an element elem from this set depending on the value of parameter included. Typically, one would use the following syntax: 
set(elem) = true
Methods inherited from Set
size (abstract), contains (abstract), apply, isEmpty, subsetOf, *, **, equals, hashCode, toArray, stringPrefix
Methods inherited from Collection
toString
Methods inherited from Iterable
elements (abstract), concat, ++, map, flatMap, filter, partition, takeWhile, dropWhile, take, drop, foreach, forall, exists, find, findIndexOf, indexOf, foldLeft, foldRight, /:, :\, reduceLeft, reduceRight, copyToBuffer, sameElements, toList, toSeq, toStream, mkString, mkString, mkString, addString, addString, addString, copyToArray, projection, hasDefiniteSize
Methods inherited from Function1
compose, andThen
Methods inherited from AnyRef
getClass, notify, notifyAll, wait, wait, wait, finalize, ==, !=, eq, ne, synchronized
Methods inherited from Any
==, !=, isInstanceOf, asInstanceOf
Method Details
def update(elem : A, included : Boolean) : Unit
This method allows one to add or remove an element elem from this set depending on the value of parameter included. Typically, one would use the following syntax: 
set(elem) = true
abstract def +=(elem : A) : Unit
Add a new element to the set.
Parameters
elem - the element to be added
def +=(elem1 : A, elem2 : A, elems : A*) : Unit
Add two or more elements to this set.
Parameters
elem1 - the first element.
elem2 - the second element.
elems - the remaining elements.
def ++=(elems : Iterable[A]) : Unit
Add all the elements provided by an iterator of the iterable object that to the set.
Parameters
elems - the iterable object containing the elements to be added
def ++=(elems : Iterator[A]) : Unit
Add all the elements provided by an iterator elems to the set.
Parameters
elems - the iterator containing the elements to be added
def +(elem : A) : Set[A]
Add a new element to the set.
Returns
the set itself with the element added.
Parameters
elem - the element to be added
def +(elem1 : A, elem2 : A, elems : A*) : Set[A]
Add two or more elements to this set.
Parameters
elem1 - the first element.
kv2 - the second element.
kvs - the remaining elements.
Returns
the set itself with the elements added.
def ++(elems : Iterable[A]) : Set[A]
Add all the elements provided by an iterator of the iterable object elems to the set.
Parameters
elems - the iterable object containing the elements to be added
Returns
the set itself with the elements added.
def ++(elems : Iterator[A]) : Set[A]
Add all the elements provided by an iterator elems to the set.
Parameters
elems - the iterator containing the elements to be added
@deprecated

def incl(elems : A*) : Unit
incl can be used to add many elements to the set at the same time.
Deprecated
use ++= instead
abstract def -=(elem : A) : Unit
Removes a single element from a set.
Parameters
elem - The element to be removed.
def -=(elem1 : A, elem2 : A, elems : A*) : Unit
Remove two or more elements from this set.
Parameters
elem1 - the first element.
elem2 - the second element.
elems - the remaining elements.
def --=(elems : Iterable[A]) : Unit
Remove all the elements provided by an iterator of the iterable object elems from the set.
def --=(elems : Iterator[A]) : Unit
Remove all the elements provided by an iterator elems from the set.
def -(elem : A) : Set[A]
Remove a new element from the set.
Returns
the set itself with the element removed.
Parameters
elem - the element to be removed
def -(elem1 : A, elem2 : A, elems : A*) : Set[A]
Remove two or more elements from this set.
Parameters
elem1 - the first element.
elem2 - the second element.
elems - the remaining elements.
Returns
the set itself with the elements removed.
def --(elems : Iterable[A]) : Set[A]
Remove all the elements provided by an iterator of the iterable object elems from the set.
Parameters
elems - An iterable object containing the elements to remove from the set.
Returns
the set itself with the elements removed.
def --(elems : Iterator[A]) : Set[A]
Remove all the elements provided by an iterator elems from the set.
Parameters
elems - An iterator containing the elements to remove from the set.
Returns
the set itself with the elements removed.
@deprecated

def excl(elems : A*) : Unit
excl removes many elements from the set.
def intersect(that : Set[A]) : Unit
This method computes an intersection with set that. It removes all the elements that are not present in that.
Parameters
that - the set to intersect with.
def retain(p : (A) => Boolean) : Unit
Method retain removes all elements from the set for which the predicate p yields the value false.
def clear : Unit
Removes all elements from the set. After this operation is completed, the set will be empty.
def <<(cmd : Message[A]) : Unit
Send a message to this scriptable object.
Parameters
cmd - the message to send.
Throws
<code>Predef.UnsupportedOperationException</code> - if the message was not understood.
Overrides
Scriptable.<<
override def clone : Set[A]
Return a clone of this set.
Returns
a set with the same elements.
Overrides
CloneableCollection.clone
def readOnly : Set[A]
Return a read-only projection of this set
Scala Library