Scala Library
scala.collection.jcl.Map

class Lense
[source: scala/collection/jcl/Map.scala]
protected class Lense[F](f : (E) => F, g : (F) => E)
extends Projection[K, F]
Direct Known Subclasses:
SortedMap.Lense
Method Summary
override def elements : MutableIterator[(K, F)]
The default implementation of a map over mutable iterable collections.
override def get (key : K) : Option[F]
Check if this map maps key to a value and return the value if it exists.
override def lense [G](f0 : (F) => G, g0 : (G) => F) : Projection[K, G]
override def put (key : K, elem : F) : Option[F]
Map key to elem in this map and return the element that the key was previously mapped to (if any).
override def removeKey (key : K) : Option[F]
Remove key from this map and return the element that the key was previously mapped to (if any).
override def size : Int
Compute the number of key-to-value mappings.
Methods inherited from Projection
projection, map
Methods inherited from Map
clear, isEmpty, keySet, keys, valueSet, ++=, has, update, +, +=, -, remove, -=, filterKeys
Methods inherited from Map
+=, ++=, +, ++, ++, -=, --=, --=, -, --, --, getOrElseUpdate, transform, retain, <<, clone, readOnly, +=, incl, excl
Methods inherited from Map
getOrElse, apply, contains, isDefinedAt, values, equals, hashCode, toString, default, mapElements, stringPrefix
Methods inherited from PartialFunction
orElse, andThen
Methods inherited from Function1
compose
Methods inherited from Projection
filter
Methods inherited from Projection
force, flatMap, takeWhile, append
Methods inherited from MutableIterable
removeAll, --, -, retainOnly, retainAll, size0
Methods inherited from Collection
toArray
Methods inherited from Iterable
concat, ++, partition, 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
Method Details
override def elements : MutableIterator[(K, F)]
The default implementation of a map over mutable iterable collections.
override def removeKey(key : K) : Option[F]
Remove key from this map and return the element that the key was previously mapped to (if any).
override def put(key : K, elem : F) : Option[F]
Map key to elem in this map and return the element that the key was previously mapped to (if any).
override def get(key : K) : Option[F]
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 lense[G](f0 : (F) => G, g0 : (G) => F) : Projection[K, G]
override def size : Int
Compute the number of key-to-value mappings.
Returns
the number of mappings
Scala Library