scala.collection.jcl

trait Set

[source: scala/collection/jcl/Set.scala]

trait Set[A]
extends Collection[A] with Set[A]
Analogous to a Java set.
Author
Sean McDirmid
Direct Known Subclasses:
Map.KeySet, Set.Filter, SetWrapper, SortedSet

Method Summary
override def + (t : A) : Set
Add a new element to the set.
override def ++ (i : Iterable[A]) : Set
Add all the elements provided by an iterator of the iterable object elems to the set.
override def - (t : A) : Set
Remove a new element from the set.
override def -- (i : Iterable[A]) : Set
Remove all the elements provided by an iterator of the iterable object elems from the set.
override abstract def add (a : A) : Boolean
Add will return false if "a" already exists in the set.
override def clear : Unit
Removes all elements from the set. After this operation is completed, the set will be empty.
override final def contains (a : A) : Boolean
Checks if this set contains element elem.
override def isEmpty : Boolean
Checks if this set is empty.
override def projection : Projection
returns a facade that can be used to call non-strict filter, map, and flatMap methods that build projections of the collection.
override def retain (f : (A) => Boolean) : Unit
Method retain removes all elements from the set for which the predicate p yields the value false.
override def subsetOf (set : Set[A]) : Boolean
Checks if this set is a subset of set that.
override def transform (f : (A) => A) : Boolean
Transforms each element of the collection in-place according to f.
Methods inherited from Set
update, +=, ++=, ++=, +, ++, incl, -=, --=, --=, -, --, excl, intersect, <<, clone, readOnly
Methods inherited from Set
size (abstract), apply, equals, hashCode, toArray
Methods inherited from Function1
toString, compose, andThen
Methods inherited from Collection
hasAll, addAll, -=, +=
Methods inherited from MutableIterable
elements (abstract), has, remove, removeAll, retainAll, size0
Methods inherited from Collection
stringPrefix
Methods inherited from Iterable
concat, ++, map, flatMap, filter, takeWhile, dropWhile, take, drop, foreach, forall, exists, find, findIndexOf, indexOf, foldLeft, foldRight, /:, :\, reduceLeft, reduceRight, copyToBuffer, sameElements, toList, mkString, mkString, addString, addString, copyToArray, hasDefiniteSize
Methods inherited from AnyRef
getClass, notify, notifyAll, wait, wait, wait, finalize, ==, !=, eq, ne, synchronized
Methods inherited from Any
==, !=, isInstanceOf, asInstanceOf
Class Summary
class Filter (p : (A) => Boolean) extends Filter with Set[A]
Base implementation of a filtered collection
trait Projection extends Projection
Method Details
override abstract def add(a : A) : Boolean
Add will return false if "a" already exists in the set.
Overrides
Collection.add

override def ++(i : Iterable[A]) : Set
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.
Overrides
Collection.++, Set.++

override def --(i : Iterable[A]) : Set
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.
Overrides
Set.--

override def +(t : A) : Set
Add a new element to the set.
Returns
the set itself with the element added.
Parameters
elem - the element to be added
Overrides
Collection.+, Set.+

override def -(t : A) : Set
Remove a new element from the set.
Returns
the set itself with the element removed.
Parameters
elem - the element to be removed
Overrides
Set.-

override def retain(f : (A) => Boolean) : Unit
Method retain removes all elements from the set for which the predicate p yields the value false.
Overrides
Set.retain

override def isEmpty : Boolean
Checks if this set is empty.
Returns
true iff there is no element in the set.

override final def contains(a : A) : Boolean
Checks if this set contains element elem.
Parameters
elem - the element to check for membership.
Returns
true iff elem is contained in this set.

override def clear : Unit
Removes all elements from the set. After this operation is completed, the set will be empty.
Overrides
Set.clear

override def subsetOf(set : Set[A]) : Boolean
Checks if this set is a subset of set that.
Parameters
that - another set.
Returns
true iff the other set is a superset of this set. todo: rename to isSubsetOf

override def transform(f : (A) => A) : Boolean
Transforms each element of the collection in-place according to f.
Parameters
f -
Returns
true if the collection is actually updated.
Overrides
Collection.transform

override def projection : Projection
returns a facade that can be used to call non-strict filter, map, and flatMap methods that build projections of the collection.
Overrides
Collection.projection