trait Map in scala.collection.jcl

override def clear : Unit

Removes all mappings from the map. After this operation is completed, the map is empty.

Overrides: MutableIterable.clear, Map.clear

override def isEmpty : Boolean

Is this an empty map?

Returns: true iff the map is empty.

override def keySet : Set[K]

Returns: the keys of this map as a set.

override final def keys : MutableIterator[K]

Creates an iterator for all keys.

Returns: an iterator over all keys.

def valueSet : Projection[E]

The values of this map as a projection, which means removals from the returned collection will remove the element from this map.

Returns: s a projection of this map's elements.

override def put(key : K, elem : E) : Option[E]

Map key to elem in this map and return the element that the key was previously mapped to (if any).

Overrides: Map.put

override def ++=(that : Iterable[(K, E)]) : Unit

Add a sequence of key/value pairs to this map.

Parameters: kvs - the iterable object containing all key/value pairs.

Overrides: Map.++=

override def removeKey(key : K) : Option[E]

Remove key from this map and return the element that the key was previously mapped to (if any).

Overrides: Map.removeKey

override def has(pair : (K, E)) : Boolean

Returns: true if t is in the collection.

Overrides: MutableIterable.has

override def get(key : K) : Option[E]

Check if this map maps key to a value and return the value if it exists.

Parameters: key - the key of the mapping of interest
Returns: the value of the mapping, if it exists

override def update(key : K, e : E) : Unit

This method allows one to add a new mapping from key to value to the map. If the map already contains a mapping for key, it will be overridden by this function.

Parameters: key - The key to update; value - The new value

Overrides: Map.update

override def +(pair : (K, E)) : Map[K, E]

Add a key/value pair to this map.

Parameters: kv - the key/value pair.
Returns: The map itself with the new binding added in place.

Overrides: Map.+

override def +=(pair : (K, E)) : Unit

Add a key/value pair to this map.

Parameters: kv - the key/value pair.

Overrides: Map.+=

override def -(key : K) : Map[K, E]

Remove a key from this map

Parameters: key - the key to be removed
Returns: The map itself with the binding for key removed if it existed.

Overrides: Map.-

override def remove(p : (K, E)) : Boolean

Returns: true if t was removed from this collection.

Overrides: MutableIterable.remove

override def -=(key : K) : Unit

Remove a key from this map, noop if key is not present.

Parameters: key - the key to be removed

Overrides: Map.-=

override abstract def elements : MutableIterator[(K, E)]

The default implementation of a map over mutable iterable collections.

Overrides: MutableIterable.elements

override def projection : Projection[K, E]

returns a projection that can be used to call non-strict filter, map, and flatMap methods that build projections of the collection.

Overrides: MutableIterable.projection

def lense[F](f : (E) => F, g : (F) => E) : Projection[K, F]

override def filterKeys(p : (K) => Boolean) : Projection[K, E]

non-strict filter based on keys only

Method Summary
`override def`	+ (pair : (K, E)) : Map[K, E] Add a key/value pair to this map.
`override def`	++= (that : Iterable[(K, E)]) : Unit Add a sequence of key/value pairs to this map.
`override def`	+= (pair : (K, E)) : Unit Add a key/value pair to this map.
`override def`	- (key : K) : Map[K, E] Remove a key from this map
`override def`	-= (key : K) : Unit Remove a key from this map, noop if key is not present.
`override def`	clear : Unit Removes all mappings from the map. After this operation is completed, the map is empty.
`override abstract def`	elements : MutableIterator[(K, E)] The default implementation of a map over mutable iterable collections.
`override def`	filterKeys (p : (K) => Boolean) : Projection[K, E] non-strict filter based on keys only
`override def`	get (key : K) : Option[E] Check if this map maps `key` to a value and return the value if it exists.
`override def`	has (pair : (K, E)) : Boolean
`override def`	isEmpty : Boolean Is this an empty map?
`override def`	keySet : Set[K]
`override final def`	keys : MutableIterator[K] Creates an iterator for all keys.
`def`	lense [F](f : (E) => F, g : (F) => E) : Projection[K, F]
`override def`	projection : Projection[K, E] returns a projection that can be used to call non-strict `filter`, `map`, and `flatMap` methods that build projections of the collection.
`override def`	put (key : K, elem : E) : Option[E] Map `key` to `elem` in this map and return the element that the key was previously mapped to (if any).
`override def`	remove (p : (K, E)) : Boolean
`override def`	removeKey (key : K) : Option[E] Remove `key` from this map and return the element that the key was previously mapped to (if any).
`override def`	update (key : K, e : E) : Unit This method allows one to add a new mapping from `key` to `value` to the map. If the map already contains a mapping for `key`, it will be overridden by this function.
`def`	valueSet : Projection[E] The values of this map as a projection, which means removals from the returned collection will remove the element from this map.

Class Summary
`protected class`	Filter (p : (K) => Boolean) `extends` Projection[K, E]
`protected class`	KeySet `extends` Set[K]
`protected class`	Lense [F](f : (E) => F, g : (F) => E) `extends` Projection[K, F]

Methods inherited from Map
+=, ++=, +, ++, ++, -=, --=, --=, -, --, --, getOrElseUpdate, transform, retain, <<, clone, readOnly, +=, incl, excl

Methods inherited from Map
size (abstract), getOrElse, apply, contains, isDefinedAt, values, equals, hashCode, toString, default, mapElements, stringPrefix

Methods inherited from MutableIterable
removeAll, --, -, retainOnly, retainAll, size0

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 AnyRef
getClass, notify, notifyAll, wait, wait, wait, finalize, ==, !=, eq, ne, synchronized

Methods inherited from Any
==, !=, isInstanceOf, asInstanceOf

	Scala Library

Methods inherited from PartialFunction
orElse, andThen

	Scala Library