Scala Library
scala.collection.jcl.Map

class KeySet
[source: scala/collection/jcl/Map.scala]
protected class KeySet
extends Set[K]
Direct Known Subclasses:
MapWrapper.KeySet, SortedMap.KeySet
Method Summary
override def add (k : K) : Boolean
Add will return false if "a" already exists in the set.
override def elements : MutableIterator[K]
The default implementation of a map over mutable iterable collections.
override def has (k : K) : Boolean
override def size : Int
Returns the number of elements in this set.
Methods inherited from Set
contains, ++, --, +, -, retain, isEmpty, clear, subsetOf, transform, projection
Methods inherited from Collection
hasAll, addAll, -=, +=
Methods inherited from MutableIterable
remove, removeAll, retainOnly, retainAll, size0
Methods inherited from Set
update, +=, ++=, ++=, +, ++, incl, -=, --=, --=, -, --, excl, intersect, <<, clone, readOnly
Methods inherited from Set
apply, *, **, equals, hashCode, toArray, stringPrefix
Methods inherited from Collection
toString
Methods inherited from Iterable
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, 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
override def size : Int
Returns the number of elements in this set.
Returns
number of set elements.
override def add(k : K) : Boolean
Add will return false if "a" already exists in the set.
Overrides
Set.add
override def elements : MutableIterator[K]
The default implementation of a map over mutable iterable collections.
override def has(k : K) : Boolean
Returns
true if t is in the collection.
Scala Library