Packages

  • package root

    This is the documentation for the Scala standard library.

    This is the documentation for the Scala standard library.

    Package structure

    The scala package contains core types like Int, Float, Array or Option which are accessible in all Scala compilation units without explicit qualification or imports.

    Notable packages include:

    Other packages exist. See the complete list on the right.

    Additional parts of the standard library are shipped as separate libraries. These include:

    Automatic imports

    Identifiers in the scala package and the scala.Predef object are always in scope by default.

    Some of these identifiers are type aliases provided as shortcuts to commonly used classes. For example, List is an alias for scala.collection.immutable.List.

    Other aliases refer to classes provided by the underlying platform. For example, on the JVM, String is an alias for java.lang.String.

    Definition Classes
    root
  • package scala

    Core Scala types.

    Core Scala types. They are always available without an explicit import.

    Definition Classes
    root
  • package collection
    Definition Classes
    scala
  • trait MapOps[K, +V, +CC[_, _] <: IterableOps[_, AnyConstr, _], +C] extends IterableOps[(K, V), Iterable, C] with PartialFunction[K, V]

    Base Map implementation type

    Base Map implementation type

    K

    Type of keys

    V

    Type of values

    CC

    type constructor of the map (e.g. HashMap). Operations returning a collection with a different type of entries (L, W) (e.g. map) return a CC[L, W].

    C

    type of the map (e.g. HashMap[Int, String]). Operations returning a collection with the same type of element (e.g. drop, filter) return a C.

    Definition Classes
    collection
  • GenKeySet
  • KeySet

trait GenKeySet extends AnyRef

A generic trait that is reused by keyset implementations

Attributes
protected
Self Type
GenKeySet with Set[K]
Source
Map.scala
Linear Supertypes
Type Hierarchy
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. GenKeySet
  2. AnyRef
  3. Any
Implicitly
  1. by any2stringadd
  2. by StringFormat
  3. by Ensuring
  4. by ArrowAssoc
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Visibility
  1. Public
  2. Protected

Value Members

  1. def contains(key: K): Boolean
  2. def isEmpty: Boolean
  3. def iterator: Iterator[K]
  4. def knownSize: Int
  5. def size: Int