Scala Library Documentation


scala/collection/immutable/Set.scala
]
trait
Set[A]
extends
Set[A]This class defines the interface for immutable sets. Operations on an immutable set leave the original set unchanged, and return a new set if needed.
Concrete set implementations just have to provide functionality for
the abstract methods in scala.collection.Set
as well as
for +
and 
.
Note that abstract immutable.Set's are not covariant in their type
parameter. This is because some implementations cannot support the
+
method for arbitrary types.
Method Summary  
override def

**
(that : Set[A]) : Set[A]
This method is an alias for
intersect .
It computes an intersection with set that .
It removes all the elements that are not present in that . 
abstract def

+
(elem : A) : Set[A]
Create a new set with an additional element.

def

+
(elem1 : A, elem2 : A, elems : A*) : Set[A]
Add two or more elements to this 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]) : Set[A]
Add all the elements provided by an iterator to the set.

def


(elem1 : A, elem2 : A, elems : A*) : Set[A]
Remove two or more elements from this set.

abstract def


(elem : A) : Set[A]
Remove a single element from a 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 : Iterator[A]) : Set[A]
Remove all the elements provided by an iterator
elems from the set. 
abstract def

empty [B] : Set[B] 
def

excl
(elems : A*) : Set[A]
excl removes many elements from the set. 
def

excl
(that : Iterable[A]) : Set[A]
This method removes all the elements provided by an iterator
of the iterable object
that from the set. 
override def

filter
(p : (A) => Boolean) : Set[A]
Method
filter removes all elements from the set for
which the predicate p yields the value false . 
override def

flatMap
[B](f : (A) => Iterable[B]) : Set[B]
Applies the given function
f to each element of
this set, then forms the union of all results. 
def

incl
(that : Iterable[A]) : Set[A]
This method will add all the elements provided by an iterator
of the iterable object
that to the set. 
def

incl
(elems : A*) : Set[A]
incl can be used to add many elements to the set
at the same time. 
def

intersect
(that : Set[A]) : Set[A]
This method computes an intersection with set
that .
It removes all the elements that are not present in that . 
override def

map
[B](f : (A) => B) : Set[B]
Returns the set resulting from applying the given function
f to each
element of this set. 
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, ++, partition, takeWhile, dropWhile, take, drop, foreach, forall, exists, find, findIndexOf, indexOf, foldLeft, foldRight, /:, :\, reduceLeft, reduceRight, copyToBuffer, sameElements, toList, toStream, mkString, mkString, mkString, addString, addString, copyToArray, projection, hasDefiniteSize 
Methods inherited from Function1  
compose, andThen 
Methods inherited from AnyRef  
getClass, clone, notify, notifyAll, wait, wait, wait, finalize, ==, !=, eq, ne, synchronized 
Methods inherited from Any  
==, !=, isInstanceOf, asInstanceOf 
Method Details 
elem1 
the first element.elem2 
the second element.elems 
the remaining elements.elems
to the set.elems 
the iterable object containing the elements to be addedelems 
the iterator containing the elements to be added
def
incl(elems : A*) : Set[A]
incl
can be used to add many elements to the set
at the same time.+
instead
def
incl(that : Iterable[A]) : Set[A]
that
to the set.++
insteadelem 
the element to be removedelem1 
the first element.elem2 
the second element.elems 
the remaining elements.elems
from the set.elems 
An iterable object containing the elements to remove from the set.elems
from the set.elems 
An iterator containing the elements to remove from the set.
def
excl(elems : A*) : Set[A]
excl
removes many elements from the set.
def
excl(that : Iterable[A]) : Set[A]
that
from the set.that 
the iterable collection.that
.
It removes all the elements that are not present in that
.that 
the set to intersect with.intersect
.
It computes an intersection with set that
.
It removes all the elements that are not present in that
.that 
the set to intersect withf
to each
element of this set.f 
function to apply to each element.f(a0), ..., f(an)
if this set contains a0, ..., an
.f
to each element of
this set, then forms the union of all results.f 
function to apply to each element.f(a0), ..., f(an)
if this set contains a0, ..., an
.filter
removes all elements from the set for
which the predicate p
yields the value false
.p 
The predicate used to filter the set
Scala Library Documentation

