Scala Standard Library2.13.9 < Back
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# 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:

  - `scala.collection` and its sub-packages contain Scala's collections framework
    - `scala.collection.immutable` - Immutable, sequential data-structures such as `Vector`, `List`, `Range`, `HashMap` or `HashSet`
    - `scala.collection.mutable` - Mutable, sequential data-structures such as `ArrayBuffer`, `StringBuilder`, `HashMap` or `HashSet`
    - `scala.collection.concurrent` - Mutable, concurrent data-structures such as `TrieMap`
  - `scala.concurrent` - Primitives for concurrent programming such as `Futures` and `Promises`
  - `scala.io` - Input and output operations
  - `scala.math` - Basic math functions and additional numeric types like `BigInt` and `BigDecimal`
  - `scala.sys` - Interaction with other processes and the operating system
  - `scala.util.matching` - Regular expressions

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

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

  - `scala.reflect` - Scala's reflection API (scala-reflect.jar)
  - `scala.xml` - XML parsing, manipulation, and serialization (scala-xml.jar)
  - `scala.collection.parallel` - Parallel collections (scala-parallel-collections.jar)
  - `scala.util.parsing` - Parser combinators (scala-parser-combinators.jar)
  - `scala.swing` - A convenient wrapper around Java's GUI framework called Swing (scala-swing.jar)

  #### 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
-  package concurrent
  Definition Classes
    collection
- Map
- TrieMap

t

scala.collection.concurrent

# Map

###

#### trait Map[K, V] extends mutable.Map[K, V]

A template trait for mutable maps that allow concurrent access.

This is a base trait for all Scala concurrent map implementations. It provides all of the methods a `Map` does, with the difference that all the changes are atomic. It also describes methods specific to concurrent maps.

Note: The concurrent maps do not accept `null` for keys or values.

K

  the key type of the map

V

  the value type of the map

Source
  Map.scala
See also

  "Scala's Collection Library overview" section on `Concurrent Maps` for more information.

Linear Supertypes
mutable.Map[K, V], mutable.MapOps[K, V, mutable.Map, mutable.Map[K, V]], Shrinkable[K], Builder[(K, V), mutable.Map[K, V]], Growable[(K, V)], Clearable, mutable.Cloneable[mutable.Map[K, V]], java.lang.Cloneable, collection.Map[K, V], Equals, MapFactoryDefaults[K, V, [x, y]mutable.Map[x, y], [x]mutable.Iterable[x]], MapOps[K, V, [_, _]mutable.Map[_, _], mutable.Map[K, V]], PartialFunction[K, V], (K) => V, mutable.Iterable[(K, V)], Iterable[(K, V)], IterableFactoryDefaults[(K, V), [x]mutable.Iterable[x]], IterableOps[(K, V), [_]mutable.Iterable[_], mutable.Map[K, V]], IterableOnceOps[(K, V), [_]mutable.Iterable[_], mutable.Map[K, V]], IterableOnce[(K, V)], AnyRef, Any
Known Subclasses
TrieMap
Type Hierarchy

Ordering

1. Alphabetic
2. By Inheritance

Inherited

1. Map
2. Map
3. MapOps
4. Shrinkable
5. Builder
6. Growable
7. Clearable
8. Cloneable
9. Cloneable
10. Map
11. Equals
12. MapFactoryDefaults
13. MapOps
14. PartialFunction
15. Function1
16. Iterable
17. Iterable
18. IterableFactoryDefaults
19. IterableOps
20. IterableOnceOps
21. IterableOnce
22. AnyRef
23. Any

Implicitly

1. by UnliftOps
2. by iterableOnceExtensionMethods
3. by any2stringadd
4. by StringFormat
5. by Ensuring
6. by ArrowAssoc

1. Hide All
2. Show All

Visibility

1. Public
2. Protected

### Type Members

1.  trait GenKeySet extends AnyRef

   A generic trait that is reused by keyset implementations

   A generic trait that is reused by keyset implementations

   Attributes
     protected
   Definition Classes
     MapOps
2.  class KeySet extends AbstractSet[K] with GenKeySet with DefaultSerializable

   The implementation class of the set returned by `keySet`.

   The implementation class of the set returned by `keySet`.

   Attributes
     protected
   Definition Classes
     MapOps

### Abstract Value Members

1.  abstract def addOne(elem: (K, V)): Map.this.type

   Adds a single element to this concurrent map.

   Adds a single element to this concurrent map.

   elem

     the element to add.

   returns

     the concurrent map itself

   Definition Classes
     Growable
2.  abstract def get(key: K): Option[V]

   Optionally returns the value associated with a key.

   Optionally returns the value associated with a key.

   key

     the key value

   returns

     an option value containing the value associated with `key` in this map, or `None` if none exists.

   Definition Classes
     MapOps
3.  abstract def iterator: Iterator[(K, V)]

   Iterator can be used only once

   Iterator can be used only once

   Definition Classes
     IterableOnce
4.  abstract def putIfAbsent(k: K, v: V): Option[V]

   Associates the given key with a given value, unless the key was already associated with some other value.

   Associates the given key with a given value, unless the key was already associated with some other value.

   This is an atomic operation.

   k

     key with which the specified value is to be associated with

   v

     value to be associated with the specified key

   returns

     `Some(oldvalue)` if there was a value `oldvalue` previously associated with the specified key, or `None` if there was no mapping for the specified key

5.  abstract def remove(k: K, v: V): Boolean

   Removes the entry for the specified key if it's currently mapped to the specified value.

   Removes the entry for the specified key if it's currently mapped to the specified value.

   This is an atomic operation.

   k

     key for which the entry should be removed

   v

     value expected to be associated with the specified key if the removal is to take place

   returns

     `true` if the removal took place, `false` otherwise

6.  abstract def replace(k: K, v: V): Option[V]

   Replaces the entry for the given key only if it was previously mapped to some value.

   Replaces the entry for the given key only if it was previously mapped to some value.

   This is an atomic operation.

   k

     key for which the entry should be replaced

   v

     value to be associated with the specified key

   returns

     `Some(v)` if the given key was previously mapped to some value `v`, or `None` otherwise

7.  abstract def replace(k: K, oldvalue: V, newvalue: V): Boolean

   Replaces the entry for the given key only if it was previously mapped to a given value.

   Replaces the entry for the given key only if it was previously mapped to a given value.

   This is an atomic operation.

   k

     key for which the entry should be replaced

   oldvalue

     value expected to be associated with the specified key if replacing is to happen

   newvalue

     value to be associated with the specified key

   returns

     `true` if the entry was replaced, `false` otherwise

8.  abstract def subtractOne(elem: K): Map.this.type

   Removes a single element from this concurrent map.

   Removes a single element from this concurrent map.

   elem

     the element to remove.

   returns

     the concurrent map itself

   Definition Classes
     Shrinkable

### Concrete Value Members

1.  final def !=(arg0: Any): Boolean

   Test two objects for inequality.

   Test two objects for inequality.

   returns

     `true` if !(this == that), false otherwise.

   Definition Classes
     AnyRef → Any
2.  final def ##: Int

   Equivalent to `x.hashCode` except for boxed numeric types and `null`.

   Equivalent to `x.hashCode` except for boxed numeric types and `null`. For numerics, it returns a hash value which is consistent with value equality: if two value type instances compare as true, then ## will produce the same hash value for each of them. For `null` returns a hashcode where `null.hashCode` throws a `NullPointerException`.

   returns

     a hash value consistent with ==

   Definition Classes
     AnyRef → Any
3.  def ++[V2 >: V](xs: IterableOnce[(K, V2)]): mutable.Map[K, V2]

   Alias for `concat`

   Alias for `concat`

   Definition Classes
     MapOps
4.  final def ++[B >: (K, V)](suffix: IterableOnce[B]): mutable.Iterable[B]

   Alias for `concat`

   Alias for `concat`

   Definition Classes
     IterableOps
   Annotations
     @inline()
5.  final def ++=(xs: IterableOnce[(K, V)]): Map.this.type

   Alias for `addAll`

   Alias for `addAll`

   Definition Classes
     Growable
   Annotations
     @inline()
6.  final def +=(elem: (K, V)): Map.this.type

   Alias for `addOne`

   Alias for `addOne`

   Definition Classes
     Growable
   Annotations
     @inline()
7.  final def --=(xs: IterableOnce[K]): Map.this.type

   Alias for `subtractAll`

   Alias for `subtractAll`

   Definition Classes
     Shrinkable
   Annotations
     @inline()
8.  final def -=(elem: K): Map.this.type

   Alias for `subtractOne`

   Alias for `subtractOne`

   Definition Classes
     Shrinkable
   Annotations
     @inline()
9.  def ->[B](y: B): (Map[K, V], B)
   Implicit
     This member is added by an implicit conversion from Map[K, V] toArrowAssoc[Map[K, V]] performed by method ArrowAssoc in scala.Predef.This conversion will take place only if V is a subclass of Option[Nothing] (V <: Option[Nothing]).
   Definition Classes
     ArrowAssoc
   Annotations
     @inline()
10.  final def ==(arg0: Any): Boolean

    The expression `x == that` is equivalent to `if (x eq null) that eq null else x.equals(that)`.

    The expression `x == that` is equivalent to `if (x eq null) that eq null else x.equals(that)`.

    returns

      `true` if the receiver object is equivalent to the argument; `false` otherwise.

    Definition Classes
      AnyRef → Any
11.  def addAll(xs: IterableOnce[(K, V)]): Map.this.type

    Adds all elements produced by an IterableOnce to this concurrent map.

    Adds all elements produced by an IterableOnce to this concurrent map.

    xs

      the IterableOnce producing the elements to add.

    returns

      the concurrent map itself.

    Definition Classes
      Growable
12.  def addString(sb: mutable.StringBuilder, start: String, sep: String, end: String): sb.type

    Appends all elements of this concurrent map to a string builder using start, end, and separator strings.

    Appends all elements of this concurrent map to a string builder using start, end, and separator strings. The written text begins with the string `start` and ends with the string `end`. Inside, the string representations (w.r.t. the method `toString`) of all elements of this concurrent map are separated by the string `sep`.

    Example:

        scala> val a = List(1,2,3,4)
        a: List[Int] = List(1, 2, 3, 4)

        scala> val b = new StringBuilder()
        b: StringBuilder =

        scala> a.addString(b , "List(" , ", " , ")")
        res5: StringBuilder = List(1, 2, 3, 4)

    start

      the starting string.

    sep

      the separator string.

    end

      the ending string.

    returns

      the string builder `b` to which elements were appended.

    Definition Classes
      MapOps → IterableOnceOps
13.  final def addString(b: mutable.StringBuilder): b.type

    Appends all elements of this concurrent map to a string builder.

    Appends all elements of this concurrent map to a string builder. The written text consists of the string representations (w.r.t. the method `toString`) of all elements of this concurrent map without any separator string.

    Example:

        scala> val a = List(1,2,3,4)
        a: List[Int] = List(1, 2, 3, 4)

        scala> val b = new StringBuilder()
        b: StringBuilder =

        scala> val h = a.addString(b)
        h: StringBuilder = 1234

    b

      the string builder to which elements are appended.

    returns

      the string builder `b` to which elements were appended.

    Definition Classes
      IterableOnceOps
    Annotations
      @inline()
14.  final def addString(b: mutable.StringBuilder, sep: String): b.type

    Appends all elements of this concurrent map to a string builder using a separator string.

    Appends all elements of this concurrent map to a string builder using a separator string. The written text consists of the string representations (w.r.t. the method `toString`) of all elements of this concurrent map, separated by the string `sep`.

    Example:

        scala> val a = List(1,2,3,4)
        a: List[Int] = List(1, 2, 3, 4)

        scala> val b = new StringBuilder()
        b: StringBuilder =

        scala> a.addString(b, ", ")
        res0: StringBuilder = 1, 2, 3, 4

    b

      the string builder to which elements are appended.

    sep

      the separator string.

    returns

      the string builder `b` to which elements were appended.

    Definition Classes
      IterableOnceOps
    Annotations
      @inline()
15.  def andThen[C](k: PartialFunction[V, C]): PartialFunction[K, C]

    Composes this partial function with another partial function that gets applied to results of this partial function.

    Composes this partial function with another partial function that gets applied to results of this partial function.

    Note that calling isDefinedAt on the resulting partial function may apply the first partial function and execute its side effect. For efficiency, it is recommended to call applyOrElse instead of isDefinedAt or apply.

    C

      the result type of the transformation function.

    k

      the transformation function

    returns

      a partial function with the domain of this partial function narrowed by other partial function, which maps arguments `x` to `k(this(x))`.

    Definition Classes
      PartialFunction
16.  def andThen[C](k: (V) => C): PartialFunction[K, C]

    Composes this partial function with a transformation function that gets applied to results of this partial function.

    Composes this partial function with a transformation function that gets applied to results of this partial function.

    If the runtime type of the function is a `PartialFunction` then the other `andThen` method is used (note its cautions).

    C

      the result type of the transformation function.

    k

      the transformation function

    returns

      a partial function with the domain of this partial function, possibly narrowed by the specified function, which maps arguments `x` to `k(this(x))`.

    Definition Classes
      PartialFunction → Function1
17.  def apply(key: K): V

    Retrieves the value which is associated with the given key.

    Retrieves the value which is associated with the given key. This method invokes the `default` method of the map if there is no mapping from the given key to a value. Unless overridden, the `default` method throws a `NoSuchElementException`.

    key

      the key

    returns

      the value associated with the given key, or the result of the map's `default` method, if none exists.

    Definition Classes
      MapOps → Function1
    Annotations
      @throws(cause = scala.this.throws.<init>$default$1[NoSuchElementException])
18.  def applyOrElse[K1 <: K, V1 >: V](x: K1, default: (K1) => V1): V1

    Applies this partial function to the given argument when it is contained in the function domain.

    Applies this partial function to the given argument when it is contained in the function domain. Applies fallback function where this partial function is not defined.

    Note that expression `pf.applyOrElse(x, default)` is equivalent to

        if(pf isDefinedAt x) pf(x) else default(x)

    except that `applyOrElse` method can be implemented more efficiently. For all partial function literals the compiler generates an `applyOrElse` implementation which avoids double evaluation of pattern matchers and guards. This makes `applyOrElse` the basis for the efficient implementation for many operations and scenarios, such as:

    - combining partial functions into `orElse`/`andThen` chains does not lead to excessive `apply`/`isDefinedAt` evaluation
    - `lift` and `unlift` do not evaluate source functions twice on each invocation
    - `runWith` allows efficient imperative-style combining of partial functions with conditionally applied actions

    For non-literal partial function classes with nontrivial `isDefinedAt` method it is recommended to override `applyOrElse` with custom implementation that avoids double `isDefinedAt` evaluation. This may result in better performance and more predictable behavior w.r.t. side effects.

    x

      the function argument

    default

      the fallback function

    returns

      the result of this function or fallback function application.

    Definition Classes
      MapOps → PartialFunction
19.  final def asInstanceOf[T0]: T0

    Cast the receiver object to be of type `T0`.

    Cast the receiver object to be of type `T0`.

    Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression `1.asInstanceOf[String]` will throw a `ClassCastException` at runtime, while the expression `List(1).asInstanceOf[List[String]]` will not. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested type.

    returns

      the receiver object.

    Definition Classes
      Any
    Exceptions thrown

      `ClassCastException` if the receiver object is not an instance of the erasure of type `T0`.

20.  def canEqual(that: Any): Boolean

    A method that should be called from every well-designed equals method that is open to be overridden in a subclass.

    A method that should be called from every well-designed equals method that is open to be overridden in a subclass. See Programming in Scala, Chapter 28 for discussion and design.

    that

      the value being probed for possible equality

    returns

      true if this instance can possibly equal `that`, otherwise false

    Definition Classes
      Map → Equals
21.  def className: String

    Defines the prefix of this object's `toString` representation.

    Defines the prefix of this object's `toString` representation.

    It is recommended to return the name of the concrete collection type, but not implementation subclasses. For example, for `ListMap` this method should return `"ListMap"`, not `"Map"` (the supertype) or `"Node"` (an implementation subclass).

    The default implementation returns "Iterable". It is overridden for the basic collection kinds "Seq", "IndexedSeq", "LinearSeq", "Buffer", "Set", "Map", "SortedSet", "SortedMap" and "View".

    returns

      a string representation which starts the result of `toString` applied to this concurrent map. By default the string prefix is the simple name of the collection class concurrent map.

    Attributes
      protected[this]
    Definition Classes
      Iterable
22.  def clear(): Unit

    Clears the contents of this builder.

    Clears the contents of this builder. After execution of this method the builder will contain no elements.

    Definition Classes
      MapOps → Builder → Clearable
23.  def clone(): mutable.Map[K, V]

    Create a copy of the receiver object.

    Create a copy of the receiver object.

    The default implementation of the `clone` method is platform dependent.

    returns

      a copy of the receiver object.

    Definition Classes
      MapOps → Cloneable → AnyRef
    Note

      not specified by SLS as a member of AnyRef

24.  final def coll: Map.this.type

    returns

      This collection as a `C`.

    Attributes
      protected
    Definition Classes
      Iterable → IterableOps
25.  def collect[K2, V2](pf: PartialFunction[(K, V), (K2, V2)]): mutable.Map[K2, V2]

    Builds a new collection by applying a partial function to all elements of this concurrent map on which the function is defined.

    Builds a new collection by applying a partial function to all elements of this concurrent map on which the function is defined.

    K2

      the key type of the returned concurrent map.

    V2

      the value type of the returned concurrent map.

    pf

      the partial function which filters and maps the concurrent map.

    returns

      a new concurrent map resulting from applying the given partial function `pf` to each element on which it is defined and collecting the results. The order of the elements is preserved.

    Definition Classes
      MapOps
26.  def collect[B](pf: PartialFunction[(K, V), B]): mutable.Iterable[B]

    Builds a new concurrent map by applying a partial function to all elements of this concurrent map on which the function is defined.

    Builds a new concurrent map by applying a partial function to all elements of this concurrent map on which the function is defined.

    B

      the element type of the returned concurrent map.

    pf

      the partial function which filters and maps the concurrent map.

    returns

      a new concurrent map resulting from applying the given partial function `pf` to each element on which it is defined and collecting the results. The order of the elements is preserved.

    Definition Classes
      IterableOps → IterableOnceOps
27.  def collectFirst[B](pf: PartialFunction[(K, V), B]): Option[B]

    Finds the first element of the concurrent map for which the given partial function is defined, and applies the partial function to it.

    Finds the first element of the concurrent map for which the given partial function is defined, and applies the partial function to it.

    Note: may not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    pf

      the partial function

    returns

      an option value containing pf applied to the first value for which it is defined, or `None` if none exists.

    Definition Classes
      IterableOnceOps
    Example:

    1. `Seq("a", 1, 5L).collectFirst({ case x: Int => x*10 }) = Some(10)`

28.  def compose[R](k: PartialFunction[R, K]): PartialFunction[R, V]

    Composes another partial function `k` with this partial function so that this partial function gets applied to results of `k`.

    Composes another partial function `k` with this partial function so that this partial function gets applied to results of `k`.

    Note that calling isDefinedAt on the resulting partial function may apply the first partial function and execute its side effect. For efficiency, it is recommended to call applyOrElse instead of isDefinedAt or apply.

    R

      the parameter type of the transformation function.

    k

      the transformation function

    returns

      a partial function with the domain of other partial function narrowed by this partial function, which maps arguments `x` to `this(k(x))`.

    Definition Classes
      PartialFunction
29.  def compose[A](g: (A) => K): (A) => V

    Composes two instances of Function1 in a new Function1, with this function applied last.

    Composes two instances of Function1 in a new Function1, with this function applied last.

    A

      the type to which function `g` can be applied

    g

      a function A => T1

    returns

      a new function `f` such that `f(x) == apply(g(x))`

    Definition Classes
      Function1
    Annotations
      @unspecialized()
30.  def concat[V2 >: V](suffix: IterableOnce[(K, V2)]): mutable.Map[K, V2]

    Returns a new concurrent map containing the elements from the left hand operand followed by the elements from the right hand operand.

    Returns a new concurrent map containing the elements from the left hand operand followed by the elements from the right hand operand. The element type of the concurrent map is the most specific superclass encompassing the element types of the two operands.

    suffix

      the traversable to append.

    returns

      a new concurrent map which contains all elements of this concurrent map followed by all elements of `suffix`.

    Definition Classes
      MapOps
31.  def concat[B >: (K, V)](suffix: IterableOnce[B]): mutable.Iterable[B]

    Returns a new concurrent map containing the elements from the left hand operand followed by the elements from the right hand operand.

    Returns a new concurrent map containing the elements from the left hand operand followed by the elements from the right hand operand. The element type of the concurrent map is the most specific superclass encompassing the element types of the two operands.

    B

      the element type of the returned collection.

    suffix

      the traversable to append.

    returns

      a new concurrent map which contains all elements of this concurrent map followed by all elements of `suffix`.

    Definition Classes
      IterableOps
32.  def contains(key: K): Boolean

    Tests whether this map contains a binding for a key.

    Tests whether this map contains a binding for a key.

    key

      the key

    returns

      `true` if there is a binding for `key` in this map, `false` otherwise.

    Definition Classes
      MapOps
33.  def copyToArray[B >: (K, V)](xs: Array[B], start: Int, len: Int): Int

    Copy elements to an array, returning the number of elements written.

    Copy elements to an array, returning the number of elements written.

    Fills the given array `xs` starting at index `start` with at most `len` elements of this concurrent map.

    Copying will stop once either all the elements of this concurrent map have been copied, or the end of the array is reached, or `len` elements have been copied.

    B

      the type of the elements of the array.

    xs

      the array to fill.

    start

      the starting index of xs.

    len

      the maximal number of elements to copy.

    returns

      the number of elements written to the array

    Definition Classes
      IterableOnceOps
    Note

      Reuse: After calling this method, one should discard the iterator it was called on. Using it is undefined and subject to change.

34.  def copyToArray[B >: (K, V)](xs: Array[B], start: Int): Int

    Copy elements to an array, returning the number of elements written.

    Copy elements to an array, returning the number of elements written.

    Fills the given array `xs` starting at index `start` with values of this concurrent map.

    Copying will stop once either all the elements of this concurrent map have been copied, or the end of the array is reached.

    B

      the type of the elements of the array.

    xs

      the array to fill.

    start

      the starting index of xs.

    returns

      the number of elements written to the array

    Definition Classes
      IterableOnceOps
    Annotations
      @deprecatedOverriding()
    Note

      Reuse: After calling this method, one should discard the iterator it was called on. Using it is undefined and subject to change.

35.  def copyToArray[B >: (K, V)](xs: Array[B]): Int

    Copy elements to an array, returning the number of elements written.

    Copy elements to an array, returning the number of elements written.

    Fills the given array `xs` starting at index `start` with values of this concurrent map.

    Copying will stop once either all the elements of this concurrent map have been copied, or the end of the array is reached.

    B

      the type of the elements of the array.

    xs

      the array to fill.

    returns

      the number of elements written to the array

    Definition Classes
      IterableOnceOps
    Annotations
      @deprecatedOverriding()
    Note

      Reuse: After calling this method, one should discard the iterator it was called on. Using it is undefined and subject to change.

36.  def corresponds[B](that: IterableOnce[B])(p: ((K, V), B) => Boolean): Boolean

    Tests whether every element of this collection's iterator relates to the corresponding element of another collection by satisfying a test predicate.

    Tests whether every element of this collection's iterator relates to the corresponding element of another collection by satisfying a test predicate.

    Note: will not terminate for infinite-sized collections.

    B

      the type of the elements of `that`

    that

      the other collection

    p

      the test predicate, which relates elements from both collections

    returns

      `true` if both collections have the same length and `p(x, y)` is `true` for all corresponding elements `x` of this iterator and `y` of `that`, otherwise `false`

    Definition Classes
      IterableOnceOps
37.  def count(p: ((K, V)) => Boolean): Int

    Counts the number of elements in the concurrent map which satisfy a predicate.

    Counts the number of elements in the concurrent map which satisfy a predicate.

    Note: will not terminate for infinite-sized collections.

    p

      the predicate used to test elements.

    returns

      the number of elements satisfying the predicate `p`.

    Definition Classes
      IterableOnceOps
38.  def default(key: K): V

    Defines the default value computation for the map, returned when a key is not found The method implemented here throws an exception, but it might be overridden in subclasses.

    Defines the default value computation for the map, returned when a key is not found The method implemented here throws an exception, but it might be overridden in subclasses.

    key

      the given key value for which a binding is missing.

    Definition Classes
      MapOps
    Annotations
      @throws(cause = scala.this.throws.<init>$default$1[NoSuchElementException])
    Exceptions thrown
39.  def drop(n: Int): mutable.Map[K, V]

    Selects all elements except first n ones.

    Selects all elements except first n ones.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    n

      the number of elements to drop from this concurrent map.

    returns

      a concurrent map consisting of all elements of this concurrent map except the first `n` ones, or else the empty concurrent map, if this concurrent map has less than `n` elements. If `n` is negative, don't drop any elements.

    Definition Classes
      IterableOps → IterableOnceOps
40.  def dropRight(n: Int): mutable.Map[K, V]

    Selects all elements except last n ones.

    Selects all elements except last n ones.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    n

      the number of elements to drop from this concurrent map.

    returns

      a concurrent map consisting of all elements of this concurrent map except the last `n` ones, or else the empty concurrent map, if this concurrent map has less than `n` elements. If `n` is negative, don't drop any elements.

    Definition Classes
      IterableOps
41.  def dropWhile(p: ((K, V)) => Boolean): mutable.Map[K, V]

    Drops longest prefix of elements that satisfy a predicate.

    Drops longest prefix of elements that satisfy a predicate.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    p

      The predicate used to test elements.

    returns

      the longest suffix of this concurrent map whose first element does not satisfy the predicate `p`.

    Definition Classes
      IterableOps → IterableOnceOps
42.  def elementWise: ElementWiseExtractor[K, V]

    Returns an extractor object with a `unapplySeq` method, which extracts each element of a sequence data.

    Returns an extractor object with a `unapplySeq` method, which extracts each element of a sequence data.

    Definition Classes
      PartialFunction
    Example:

    1.     val firstChar: String => Option[Char] = _.headOption

           Seq("foo", "bar", "baz") match {
             case firstChar.unlift.elementWise(c0, c1, c2) =>
               println(s"$c0, $c1, $c2") // Output: f, b, b
           }

43.  def empty: mutable.Map[K, V]

    The empty iterable of the same type as this iterable

    The empty iterable of the same type as this iterable

    returns

      an empty iterable of type `C`.

    Definition Classes
      MapFactoryDefaults → IterableOps
44.  def ensuring(cond: (Map[K, V]) => Boolean, msg: => Any): Map[K, V]
    Implicit
      This member is added by an implicit conversion from Map[K, V] toEnsuring[Map[K, V]] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
45.  def ensuring(cond: (Map[K, V]) => Boolean): Map[K, V]
    Implicit
      This member is added by an implicit conversion from Map[K, V] toEnsuring[Map[K, V]] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
46.  def ensuring(cond: Boolean, msg: => Any): Map[K, V]
    Implicit
      This member is added by an implicit conversion from Map[K, V] toEnsuring[Map[K, V]] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
47.  def ensuring(cond: Boolean): Map[K, V]
    Implicit
      This member is added by an implicit conversion from Map[K, V] toEnsuring[Map[K, V]] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
48.  final def eq(arg0: AnyRef): Boolean

    Tests whether the argument (`that`) is a reference to the receiver object (`this`).

    Tests whether the argument (`that`) is a reference to the receiver object (`this`).

    The `eq` method implements an equivalence relation on non-null instances of `AnyRef`, and has three additional properties:

    - It is consistent: for any non-null instances `x` and `y` of type `AnyRef`, multiple invocations of `x.eq(y)` consistently returns `true` or consistently returns `false`.
    - For any non-null instance `x` of type `AnyRef`, `x.eq(null)` and `null.eq(x)` returns `false`.
    - `null.eq(null)` returns `true`.

    When overriding the `equals` or `hashCode` methods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (`o1 eq o2`), they should be equal to each other (`o1 == o2`) and they should hash to the same value (`o1.hashCode == o2.hashCode`).

    returns

      `true` if the argument is a reference to the receiver object; `false` otherwise.

    Definition Classes
      AnyRef
49.  def equals(o: Any): Boolean

    Equality of maps is implemented using the lookup method get.

    Equality of maps is implemented using the lookup method get. This method returns `true` if

    - the argument `o` is a `Map`,
    - the two maps have the same size, and
    - for every `(key, value)` pair in this map, `other.get(key) == Some(value)`.

    The implementation of `equals` checks the canEqual method, so subclasses of `Map` can narrow down the equality to specific map types. The `Map` implementations in the standard library can all be compared, their `canEqual` methods return `true`.

    Note: The `equals` method only respects the equality laws (symmetry, transitivity) if the two maps use the same key equivalence function in their lookup operation. For example, the key equivalence operation in a scala.collection.immutable.TreeMap is defined by its ordering. Comparing a `TreeMap` with a `HashMap` leads to unexpected results if `ordering.equiv(k1, k2)` (used for lookup in `TreeMap`) is different from `k1 == k2` (used for lookup in `HashMap`).

        scala> import scala.collection.immutable._
        scala> val ord: Ordering[String] = _ compareToIgnoreCase _

        scala> TreeMap("A" -> 1)(ord) == HashMap("a" -> 1)
        val res0: Boolean = false

        scala> HashMap("a" -> 1) == TreeMap("A" -> 1)(ord)
        val res1: Boolean = true

    o

      The map to which this map is compared

    returns

      `true` if the two maps are equal according to the description

    Definition Classes
      Map → Equals → AnyRef → Any
50.  def exists(p: ((K, V)) => Boolean): Boolean

    Tests whether a predicate holds for at least one element of this concurrent map.

    Tests whether a predicate holds for at least one element of this concurrent map.

    Note: may not terminate for infinite-sized collections.

    p

      the predicate used to test elements.

    returns

      `true` if the given predicate `p` is satisfied by at least one element of this concurrent map, otherwise `false`

    Definition Classes
      IterableOnceOps
51.  def filter(pred: ((K, V)) => Boolean): mutable.Map[K, V]

    Selects all elements of this concurrent map which satisfy a predicate.

    Selects all elements of this concurrent map which satisfy a predicate.

    returns

      a new concurrent map consisting of all elements of this concurrent map that satisfy the given predicate `p`. The order of the elements is preserved.

    Definition Classes
      IterableOps → IterableOnceOps
52.  def filterInPlace(p: (K, V) => Boolean): Map.this.type

    Retains only those mappings for which the predicate `p` returns `true`.

    Retains only those mappings for which the predicate `p` returns `true`.

    p

      The test predicate

    Definition Classes
      MapOps
53.  def filterNot(pred: ((K, V)) => Boolean): mutable.Map[K, V]

    Selects all elements of this concurrent map which do not satisfy a predicate.

    Selects all elements of this concurrent map which do not satisfy a predicate.

    pred

      the predicate used to test elements.

    returns

      a new concurrent map consisting of all elements of this concurrent map that do not satisfy the given predicate `pred`. Their order may not be preserved.

    Definition Classes
      IterableOps → IterableOnceOps
54.  def finalize(): Unit

    Called by the garbage collector on the receiver object when there are no more references to the object.

    Called by the garbage collector on the receiver object when there are no more references to the object.

    The details of when and if the `finalize` method is invoked, as well as the interaction between `finalize` and non-local returns and exceptions, are all platform dependent.

    Attributes
      protected[lang]
    Definition Classes
      AnyRef
    Annotations
      @throws(classOf[java.lang.Throwable])
    Note

      not specified by SLS as a member of AnyRef

55.  def find(p: ((K, V)) => Boolean): Option[(K, V)]

    Finds the first element of the concurrent map satisfying a predicate, if any.

    Finds the first element of the concurrent map satisfying a predicate, if any.

    Note: may not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    p

      the predicate used to test elements.

    returns

      an option value containing the first element in the concurrent map that satisfies `p`, or `None` if none exists.

    Definition Classes
      IterableOnceOps
56.  def flatMap[K2, V2](f: ((K, V)) => IterableOnce[(K2, V2)]): mutable.Map[K2, V2]

    Builds a new map by applying a function to all elements of this concurrent map and using the elements of the resulting collections.

    Builds a new map by applying a function to all elements of this concurrent map and using the elements of the resulting collections.

    f

      the function to apply to each element.

    returns

      a new concurrent map resulting from applying the given collection-valued function `f` to each element of this concurrent map and concatenating the results.

    Definition Classes
      MapOps
57.  def flatMap[B](f: ((K, V)) => IterableOnce[B]): mutable.Iterable[B]

    Builds a new concurrent map by applying a function to all elements of this concurrent map and using the elements of the resulting collections.

    Builds a new concurrent map by applying a function to all elements of this concurrent map and using the elements of the resulting collections.

    For example:

        def getWords(lines: Seq[String]): Seq[String] = lines flatMap (line => line split "\\W+")

    The type of the resulting collection is guided by the static type of concurrent map. This might cause unexpected results sometimes. For example:

        // lettersOf will return a Seq[Char] of likely repeated letters, instead of a Set
        def lettersOf(words: Seq[String]) = words flatMap (word => word.toSet)

        // lettersOf will return a Set[Char], not a Seq
        def lettersOf(words: Seq[String]) = words.toSet flatMap ((word: String) => word.toSeq)

        // xs will be an Iterable[Int]
        val xs = Map("a" -> List(11,111), "b" -> List(22,222)).flatMap(_._2)

        // ys will be a Map[Int, Int]
        val ys = Map("a" -> List(1 -> 11,1 -> 111), "b" -> List(2 -> 22,2 -> 222)).flatMap(_._2)

    B

      the element type of the returned collection.

    f

      the function to apply to each element.

    returns

      a new concurrent map resulting from applying the given collection-valued function `f` to each element of this concurrent map and concatenating the results.

    Definition Classes
      IterableOps → IterableOnceOps
58.  def flatten[B](implicit asIterable: ((K, V)) => IterableOnce[B]): mutable.Iterable[B]

    Converts this concurrent map of traversable collections into a concurrent map formed by the elements of these traversable collections.

    Converts this concurrent map of traversable collections into a concurrent map formed by the elements of these traversable collections.

    The resulting collection's type will be guided by the type of concurrent map. For example:

        val xs = List(
                   Set(1, 2, 3),
                   Set(1, 2, 3)
                 ).flatten
        // xs == List(1, 2, 3, 1, 2, 3)

        val ys = Set(
                   List(1, 2, 3),
                   List(3, 2, 1)
                 ).flatten
        // ys == Set(1, 2, 3)

    B

      the type of the elements of each traversable collection.

    asIterable

      an implicit conversion which asserts that the element type of this concurrent map is a `GenTraversable`.

    returns

      a new concurrent map resulting from concatenating all element concurrent maps.

    Definition Classes
      IterableOps → IterableOnceOps
59.  def fold[A1 >: (K, V)](z: A1)(op: (A1, A1) => A1): A1

    Folds the elements of this concurrent map using the specified associative binary operator.

    Folds the elements of this concurrent map using the specified associative binary operator. The default implementation in `IterableOnce` is equivalent to `foldLeft` but may be overridden for more efficient traversal orders.

    The order in which operations are performed on elements is unspecified and may be nondeterministic.

    Note: will not terminate for infinite-sized collections.

    A1

      a type parameter for the binary operator, a supertype of `A`.

    z

      a neutral element for the fold operation; may be added to the result an arbitrary number of times, and must not change the result (e.g., `Nil` for list concatenation, 0 for addition, or 1 for multiplication).

    op

      a binary operator that must be associative.

    returns

      the result of applying the fold operator `op` between all the elements and `z`, or `z` if this concurrent map is empty.

    Definition Classes
      IterableOnceOps
60.  def foldLeft[B](z: B)(op: (B, (K, V)) => B): B

    Applies a binary operator to a start value and all elements of this concurrent map, going left to right.

    Applies a binary operator to a start value and all elements of this concurrent map, going left to right.

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.

    B

      the result type of the binary operator.

    z

      the start value.

    op

      the binary operator.

    returns

      the result of inserting `op` between consecutive elements of this concurrent map, going left to right with the start value `z` on the left: `op(...op(z, x1), x2, ..., xn)` where `x1, ..., xn` are the elements of this concurrent map. Returns `z` if this concurrent map is empty.

    Definition Classes
      IterableOnceOps
61.  def foldRight[B](z: B)(op: ((K, V), B) => B): B

    Applies a binary operator to all elements of this concurrent map and a start value, going right to left.

    Applies a binary operator to all elements of this concurrent map and a start value, going right to left.

    Note: will not terminate for infinite-sized collections.

    Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.

    B

      the result type of the binary operator.

    z

      the start value.

    op

      the binary operator.

    returns

      the result of inserting `op` between consecutive elements of this concurrent map, going right to left with the start value `z` on the right: `op(x1, op(x2, ... op(xn, z)...))` where `x1, ..., xn` are the elements of this concurrent map. Returns `z` if this concurrent map is empty.

    Definition Classes
      IterableOnceOps
62.  def forall(p: ((K, V)) => Boolean): Boolean

    Tests whether a predicate holds for all elements of this concurrent map.

    Tests whether a predicate holds for all elements of this concurrent map.

    Note: may not terminate for infinite-sized collections.

    p

      the predicate used to test elements.

    returns

      `true` if this concurrent map is empty or the given predicate `p` holds for all elements of this concurrent map, otherwise `false`.

    Definition Classes
      IterableOnceOps
63.  def foreach[U](f: ((K, V)) => U): Unit

    Apply `f` to each element for its side effects Note: [U] parameter needed to help scalac's type inference.

    Apply `f` to each element for its side effects Note: [U] parameter needed to help scalac's type inference.

    Definition Classes
      IterableOnceOps
64.  def foreachEntry[U](f: (K, V) => U): Unit

    Apply `f` to each key/value pair for its side effects Note: [U] parameter needed to help scalac's type inference.

    Apply `f` to each key/value pair for its side effects Note: [U] parameter needed to help scalac's type inference.

    Definition Classes
      MapOps
65.  def fromSpecific(coll: IterableOnce[(K, V)]): mutable.Map[K, V]

    Defines how to turn a given `Iterable[A]` into a collection of type `C`.

    Defines how to turn a given `Iterable[A]` into a collection of type `C`.

    This process can be done in a strict way or a non-strict way (ie. without evaluating the elements of the resulting collections). In other words, this methods defines the evaluation model of the collection.

    Attributes
      protected
    Definition Classes
      MapFactoryDefaults → IterableOps
    Note

      When implementing a custom collection type and refining `C` to the new type, this method needs to be overridden (the compiler will issue an error otherwise). In the common case where `C =:= CC[A]`, this can be done by mixing in the scala.collection.IterableFactoryDefaults trait, which implements the method using iterableFactory.

      ,

      As witnessed by the `@uncheckedVariance` annotation, using this method might be unsound. However, as long as it is called with an `Iterable[A]` obtained from `this` collection (as it is the case in the implementations of operations where we use a `View[A]`), it is safe.

66.  final def getClass(): Class[_ <: AnyRef]

    Returns the runtime class representation of the object.

    Returns the runtime class representation of the object.

    returns

      a class object corresponding to the runtime type of the receiver.

    Definition Classes
      AnyRef → Any
    Annotations
      @native()
67.  def getOrElse[V1 >: V](key: K, default: => V1): V1

    Returns the value associated with a key, or a default value if the key is not contained in the map.

    Returns the value associated with a key, or a default value if the key is not contained in the map.

    V1

      the result type of the default computation.

    key

      the key.

    default

      a computation that yields a default value in case no binding for `key` is found in the map.

    returns

      the value associated with `key` if it exists, otherwise the result of the `default` computation.

    Definition Classes
      MapOps
68.  def getOrElseUpdate(key: K, op: => V): V

    If given key is already in this map, returns associated value.

    If given key is already in this map, returns associated value.

    Otherwise, computes value from given expression `op`, stores with key in map and returns that value.

    Concurrent map implementations may evaluate the expression `op` multiple times, or may evaluate `op` without inserting the result.

    key

      the key to test

    op

      the computation yielding the value to associate with `key`, if `key` is previously unbound.

    returns

      the value associated with key (either previously or as a result of executing the method).

    Definition Classes
      Map → MapOps
69.  def groupBy[K](f: ((K, V)) => K): immutable.Map[K, mutable.Map[K, V]]

    Partitions this concurrent map into a map of concurrent maps according to some discriminator function.

    Partitions this concurrent map into a map of concurrent maps according to some discriminator function.

    Note: Even when applied to a view or a lazy collection it will always force the elements.

    K

      the type of keys returned by the discriminator function.

    f

      the discriminator function.

    returns

      A map from keys to concurrent maps such that the following invariant holds:

          (xs groupBy f)(k) = xs filter (x => f(x) == k)

      That is, every key `k` is bound to a concurrent map of those elements `x` for which `f(x)` equals `k`.

    Definition Classes
      IterableOps
70.  def groupMap[K, B](key: ((K, V)) => K)(f: ((K, V)) => B): immutable.Map[K, mutable.Iterable[B]]

    Partitions this concurrent map into a map of concurrent maps according to a discriminator function `key`.

    Partitions this concurrent map into a map of concurrent maps according to a discriminator function `key`. Each element in a group is transformed into a value of type `B` using the `value` function.

    It is equivalent to `groupBy(key).mapValues(_.map(f))`, but more efficient.

        case class User(name: String, age: Int)

        def namesByAge(users: Seq[User]): Map[Int, Seq[String]] =
          users.groupMap(_.age)(_.name)

    Note: Even when applied to a view or a lazy collection it will always force the elements.

    K

      the type of keys returned by the discriminator function

    B

      the type of values returned by the transformation function

    key

      the discriminator function

    f

      the element transformation function

    Definition Classes
      IterableOps
71.  def groupMapReduce[K, B](key: ((K, V)) => K)(f: ((K, V)) => B)(reduce: (B, B) => B): immutable.Map[K, B]

    Partitions this concurrent map into a map according to a discriminator function `key`.

    Partitions this concurrent map into a map according to a discriminator function `key`. All the values that have the same discriminator are then transformed by the `f` function and then reduced into a single value with the `reduce` function.

    It is equivalent to `groupBy(key).mapValues(_.map(f).reduce(reduce))`, but more efficient.

        def occurrences[A](as: Seq[A]): Map[A, Int] =
          as.groupMapReduce(identity)(_ => 1)(_ + _)

    Note: Even when applied to a view or a lazy collection it will always force the elements.

    Definition Classes
      IterableOps
72.  def grouped(size: Int): Iterator[mutable.Map[K, V]]

    Partitions elements in fixed size concurrent maps.

    Partitions elements in fixed size concurrent maps.

    size

      the number of elements per group

    returns

      An iterator producing concurrent maps of size `size`, except the last will be less than size `size` if the elements don't divide evenly.

    Definition Classes
      IterableOps
    See also

      scala.collection.Iterator, method `grouped`

73.  def hashCode(): Int

    The hashCode method for reference types.

    The hashCode method for reference types. See hashCode in scala.Any.

    returns

      the hash code value for this object.

    Definition Classes
      Map → AnyRef → Any
74.  def head: (K, V)

    Selects the first element of this concurrent map.

    Selects the first element of this concurrent map.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

      the first element of this concurrent map.

    Definition Classes
      IterableOps
    Exceptions thrown

      `NoSuchElementException` if the concurrent map is empty.

75.  def headOption: Option[(K, V)]

    Optionally selects the first element.

    Optionally selects the first element.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

      the first element of this concurrent map if it is nonempty, `None` if it is empty.

    Definition Classes
      IterableOps
76.  def init: mutable.Map[K, V]

    The initial part of the collection without its last element.

    The initial part of the collection without its last element.

    Note: Even when applied to a view or a lazy collection it will always force the elements.

    Definition Classes
      IterableOps
77.  def inits: Iterator[mutable.Map[K, V]]

    Iterates over the inits of this concurrent map.

    Iterates over the inits of this concurrent map. The first value will be this concurrent map and the final one will be an empty concurrent map, with the intervening values the results of successive applications of `init`.

    Note: Even when applied to a view or a lazy collection it will always force the elements.

    returns

      an iterator over all the inits of this concurrent map

    Definition Classes
      IterableOps
    Example:

    1. `List(1,2,3).inits = Iterator(List(1,2,3), List(1,2), List(1), Nil)`

78.  def isDefinedAt(key: K): Boolean

    Tests whether this map contains a binding for a key.

    Tests whether this map contains a binding for a key. This method, which implements an abstract method of trait `PartialFunction`, is equivalent to `contains`.

    key

      the key

    returns

      `true` if there is a binding for `key` in this map, `false` otherwise.

    Definition Classes
      MapOps → PartialFunction
79.  def isEmpty: Boolean

    Tests whether the concurrent map is empty.

    Tests whether the concurrent map is empty.

    Note: Implementations in subclasses that are not repeatedly traversable must take care not to consume any elements when `isEmpty` is called.

    returns

      `true` if the concurrent map contains no elements, `false` otherwise.

    Definition Classes
      IterableOnceOps
80.  final def isInstanceOf[T0]: Boolean

    Test whether the dynamic type of the receiver object has the same erasure as `T0`.

    Test whether the dynamic type of the receiver object has the same erasure as `T0`.

    Depending on what `T0` is, the test is done in one of the below ways:

    - `T0` is a non-parameterized class type, e.g. `BigDecimal`: this method returns `true` if the value of the receiver object is a `BigDecimal` or a subtype of `BigDecimal`.
    - `T0` is a parameterized class type, e.g. `List[Int]`: this method returns `true` if the value of the receiver object is some `List[X]` for any `X`. For example, `List(1, 2, 3).isInstanceOf[List[String]]` will return true.
    - `T0` is some singleton type `x.type` or literal `x`: this method returns `this.eq(x)`. For example, `x.isInstanceOf[1]` is equivalent to `x.eq(1)`
    - `T0` is an intersection `X with Y` or `X & Y: this method is equivalent to` x.isInstanceOf[X] && x.isInstanceOf[Y]``
    - `T0` is a union `X | Y`: this method is equivalent to `x.isInstanceOf[X] || x.isInstanceOf[Y]`
    - `T0` is a type parameter or an abstract type member: this method is equivalent to `isInstanceOf[U]` where `U` is `T0`'s upper bound, `Any` if `T0` is unbounded. For example, `x.isInstanceOf[A]` where `A` is an unbounded type parameter will return true for any value of `x`.

    This is exactly equivalent to the type pattern `_: T0`

    returns

      `true` if the receiver object is an instance of erasure of type `T0`; `false` otherwise.

    Definition Classes
      Any
    Note

      due to the unexpectedness of `List(1, 2, 3).isInstanceOf[List[String]]` returning true and `x.isInstanceOf[A]` where `A` is a type parameter or abstract member returning true, these forms issue a warning.

81.  def isTraversableAgain: Boolean

    Tests whether this concurrent map can be repeatedly traversed.

    Tests whether this concurrent map can be repeatedly traversed. Always true for Iterables and false for Iterators unless overridden.

    returns

      `true` if it is repeatedly traversable, `false` otherwise.

    Definition Classes
      IterableOps → IterableOnceOps
82.  def iterableFactory: IterableFactory[mutable.Iterable]

    The companion object of this concurrent map, providing various factory methods.

    The companion object of this concurrent map, providing various factory methods.

    Definition Classes
      Iterable → Iterable → IterableOps
    Note

      When implementing a custom collection type and refining `CC` to the new type, this method needs to be overridden to return a factory for the new type (the compiler will issue an error otherwise).

83.  def keySet: Set[K]

    Collects all keys of this map in a set.

    Collects all keys of this map in a set.

    returns

      a set containing all keys of this map.

    Definition Classes
      MapOps
84.  def keyStepper[S <: Stepper[_]](implicit shape: StepperShape[K, S]): S

    Returns a Stepper for the keys of this map.

    Returns a Stepper for the keys of this map. See method stepper.

    Definition Classes
      MapOps
85.  def keys: Iterable[K]

    Collects all keys of this map in an iterable collection.

    Collects all keys of this map in an iterable collection.

    returns

      the keys of this map as an iterable.

    Definition Classes
      MapOps
86.  def keysIterator: Iterator[K]

    Creates an iterator for all keys.

    Creates an iterator for all keys.

    returns

      an iterator over all keys.

    Definition Classes
      MapOps
87.  def knownSize: Int

    returns

      The number of elements in the collection under construction, if it can be cheaply computed, -1 otherwise. The default implementation always returns -1.

    Definition Classes
      MapOps → Growable → IterableOnce
88.  def last: (K, V)

    Selects the last element.

    Selects the last element.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

      The last element of this concurrent map.

    Definition Classes
      IterableOps
    Exceptions thrown

      `NoSuchElementException` If the concurrent map is empty.

89.  def lastOption: Option[(K, V)]

    Optionally selects the last element.

    Optionally selects the last element.

    Note: might return different results for different runs, unless the underlying collection type is ordered.

    returns

      the last element of this concurrent map$ if it is nonempty, `None` if it is empty.

    Definition Classes
      IterableOps
90.  def lazyZip[B](that: Iterable[B]): LazyZip2[(K, V), B, Map.this.type]

    Analogous to `zip` except that the elements in each collection are not consumed until a strict operation is invoked on the returned `LazyZip2` decorator.

    Analogous to `zip` except that the elements in each collection are not consumed until a strict operation is invoked on the returned `LazyZip2` decorator.

    Calls to `lazyZip` can be chained to support higher arities (up to 4) without incurring the expense of constructing and deconstructing intermediary tuples.

        val xs = List(1, 2, 3)
        val res = (xs lazyZip xs lazyZip xs lazyZip xs).map((a, b, c, d) => a + b + c + d)
        // res == List(4, 8, 12)

    B

      the type of the second element in each eventual pair

    that

      the iterable providing the second element of each eventual pair

    returns

      a decorator `LazyZip2` that allows strict operations to be performed on the lazily evaluated pairs or chained calls to `lazyZip`. Implicit conversion to `Iterable[(A, B)]` is also supported.

    Definition Classes
      Iterable
91.  def lift: (K) => Option[V]

    Turns this partial function into a plain function returning an `Option` result.

    Turns this partial function into a plain function returning an `Option` result.

    returns

      a function that takes an argument `x` to `Some(this(x))` if `this` is defined for `x`, and to `None` otherwise.

    Definition Classes
      PartialFunction
    See also

      Function.unlift

92.  def map[K2, V2](f: ((K, V)) => (K2, V2)): mutable.Map[K2, V2]

    Builds a new map by applying a function to all elements of this concurrent map.

    Builds a new map by applying a function to all elements of this concurrent map.

    f

      the function to apply to each element.

    returns

      a new concurrent map resulting from applying the given function `f` to each element of this concurrent map and collecting the results.

    Definition Classes
      MapOps
93.  def map[B](f: ((K, V)) => B): mutable.Iterable[B]

    Builds a new concurrent map by applying a function to all elements of this concurrent map.

    Builds a new concurrent map by applying a function to all elements of this concurrent map.

    B

      the element type of the returned concurrent map.

    f

      the function to apply to each element.

    returns

      a new concurrent map resulting from applying the given function `f` to each element of this concurrent map and collecting the results.

    Definition Classes
      IterableOps → IterableOnceOps
94.  def mapFactory: MapFactory[mutable.Map]

    The companion object of this map, providing various factory methods.

    The companion object of this map, providing various factory methods.

    Definition Classes
      Map → Map → MapOps
    Note

      When implementing a custom collection type and refining `CC` to the new type, this method needs to be overridden to return a factory for the new type (the compiler will issue an error otherwise).

95.  final def mapFromIterable[K2, V2](it: Iterable[(K2, V2)]): mutable.Map[K2, V2]

    Similar to `fromIterable`, but returns a Map collection type.

    Similar to `fromIterable`, but returns a Map collection type. Note that the return type is now `CC[K2, V2]`.

    Attributes
      protected
    Definition Classes
      MapOps
    Annotations
      @inline()
96.  def mapResult[NewTo](f: (mutable.Map[K, V]) => NewTo): Builder[(K, V), NewTo]

    A builder resulting from this builder my mapping the result using `f`.

    A builder resulting from this builder my mapping the result using `f`.

    Definition Classes
      Builder
97.  def mapValuesInPlace(f: (K, V) => V): Map.this.type

    Applies a transformation function to all values contained in this map.

    Applies a transformation function to all values contained in this map. The transformation function produces new values from existing keys associated values.

    f

      the transformation to apply

    returns

      the map itself.

    Definition Classes
      MapOps
98.  def max[B >: (K, V)](implicit ord: math.Ordering[B]): (K, V)

    Finds the largest element.

    Finds the largest element.

    Note: will not terminate for infinite-sized collections.

    B

      The type over which the ordering is defined.

    ord

      An ordering to be used for comparing elements.

    returns

      the largest element of this concurrent map with respect to the ordering `ord`.

    Definition Classes
      IterableOnceOps
    Exceptions thrown

      `UnsupportedOperationException` if this concurrent map is empty.

99.  def maxBy[B](f: ((K, V)) => B)(implicit cmp: math.Ordering[B]): (K, V)

    Finds the first element which yields the largest value measured by function f.

    Finds the first element which yields the largest value measured by function f.

    Note: will not terminate for infinite-sized collections.

    B

      The result type of the function f.

    f

      The measuring function.

    cmp

      An ordering to be used for comparing elements.

    returns

      the first element of this concurrent map with the largest value measured by function f with respect to the ordering `cmp`.

    Definition Classes
      IterableOnceOps
    Exceptions thrown

      `UnsupportedOperationException` if this concurrent map is empty.

100.  def maxByOption[B](f: ((K, V)) => B)(implicit cmp: math.Ordering[B]): Option[(K, V)]

     Finds the first element which yields the largest value measured by function f.

     Finds the first element which yields the largest value measured by function f.

     Note: will not terminate for infinite-sized collections.

     B

       The result type of the function f.

     f

       The measuring function.

     cmp

       An ordering to be used for comparing elements.

     returns

       an option value containing the first element of this concurrent map with the largest value measured by function f with respect to the ordering `cmp`.

     Definition Classes
       IterableOnceOps
101.  def maxOption[B >: (K, V)](implicit ord: math.Ordering[B]): Option[(K, V)]

     Finds the largest element.

     Finds the largest element.

     Note: will not terminate for infinite-sized collections.

     B

       The type over which the ordering is defined.

     ord

       An ordering to be used for comparing elements.

     returns

       an option value containing the largest element of this concurrent map with respect to the ordering `ord`.

     Definition Classes
       IterableOnceOps
102.  def min[B >: (K, V)](implicit ord: math.Ordering[B]): (K, V)

     Finds the smallest element.

     Finds the smallest element.

     Note: will not terminate for infinite-sized collections.

     B

       The type over which the ordering is defined.

     ord

       An ordering to be used for comparing elements.

     returns

       the smallest element of this concurrent map with respect to the ordering `ord`.

     Definition Classes
       IterableOnceOps
     Exceptions thrown

       `UnsupportedOperationException` if this concurrent map is empty.

103.  def minBy[B](f: ((K, V)) => B)(implicit cmp: math.Ordering[B]): (K, V)

     Finds the first element which yields the smallest value measured by function f.

     Finds the first element which yields the smallest value measured by function f.

     Note: will not terminate for infinite-sized collections.

     B

       The result type of the function f.

     f

       The measuring function.

     cmp

       An ordering to be used for comparing elements.

     returns

       the first element of this concurrent map with the smallest value measured by function f with respect to the ordering `cmp`.

     Definition Classes
       IterableOnceOps
     Exceptions thrown

       `UnsupportedOperationException` if this concurrent map is empty.

104.  def minByOption[B](f: ((K, V)) => B)(implicit cmp: math.Ordering[B]): Option[(K, V)]

     Finds the first element which yields the smallest value measured by function f.

     Finds the first element which yields the smallest value measured by function f.

     Note: will not terminate for infinite-sized collections.

     B

       The result type of the function f.

     f

       The measuring function.

     cmp

       An ordering to be used for comparing elements.

     returns

       an option value containing the first element of this concurrent map with the smallest value measured by function f with respect to the ordering `cmp`.

     Definition Classes
       IterableOnceOps
105.  def minOption[B >: (K, V)](implicit ord: math.Ordering[B]): Option[(K, V)]

     Finds the smallest element.

     Finds the smallest element.

     Note: will not terminate for infinite-sized collections.

     B

       The type over which the ordering is defined.

     ord

       An ordering to be used for comparing elements.

     returns

       an option value containing the smallest element of this concurrent map with respect to the ordering `ord`.

     Definition Classes
       IterableOnceOps
106.  final def mkString: String

     Displays all elements of this concurrent map in a string.

     Displays all elements of this concurrent map in a string.

     Delegates to addString, which can be overridden.

     returns

       a string representation of this concurrent map. In the resulting string the string representations (w.r.t. the method `toString`) of all elements of this concurrent map follow each other without any separator string.

     Definition Classes
       IterableOnceOps
     Annotations
       @inline()
107.  final def mkString(sep: String): String

     Displays all elements of this concurrent map in a string using a separator string.

     Displays all elements of this concurrent map in a string using a separator string.

     Delegates to addString, which can be overridden.

     sep

       the separator string.

     returns

       a string representation of this concurrent map. In the resulting string the string representations (w.r.t. the method `toString`) of all elements of this concurrent map are separated by the string `sep`.

     Definition Classes
       IterableOnceOps
     Annotations
       @inline()
     Example:

     1. `List(1, 2, 3).mkString("|") = "1|2|3"`

108.  final def mkString(start: String, sep: String, end: String): String

     Displays all elements of this concurrent map in a string using start, end, and separator strings.

     Displays all elements of this concurrent map in a string using start, end, and separator strings.

     Delegates to addString, which can be overridden.

     start

       the starting string.

     sep

       the separator string.

     end

       the ending string.

     returns

       a string representation of this concurrent map. The resulting string begins with the string `start` and ends with the string `end`. Inside, the string representations (w.r.t. the method `toString`) of all elements of this concurrent map are separated by the string `sep`.

     Definition Classes
       IterableOnceOps
     Example:

     1. `List(1, 2, 3).mkString("(", "; ", ")") = "(1; 2; 3)"`

109.  final def ne(arg0: AnyRef): Boolean

     Equivalent to `!(this eq that)`.

     Equivalent to `!(this eq that)`.

     returns

       `true` if the argument is not a reference to the receiver object; `false` otherwise.

     Definition Classes
       AnyRef
110.  def newSpecificBuilder: Builder[(K, V), mutable.Map[K, V]]

     returns

       a strict builder for the same collection type. Note that in the case of lazy collections (e.g. scala.collection.View or scala.collection.immutable.LazyList), it is possible to implement this method but the resulting `Builder` will break laziness. As a consequence, operations should preferably be implemented with `fromSpecific` instead of this method.

     Attributes
       protected
     Definition Classes
       MapFactoryDefaults → IterableOps
     Note

       When implementing a custom collection type and refining `C` to the new type, this method needs to be overridden (the compiler will issue an error otherwise). In the common case where `C =:= CC[A]`, this can be done by mixing in the scala.collection.IterableFactoryDefaults trait, which implements the method using iterableFactory.

       ,

       As witnessed by the `@uncheckedVariance` annotation, using this method might be unsound. However, as long as the returned builder is only fed with `A` values taken from `this` instance, it is safe.

111.  def nonEmpty: Boolean

     Tests whether the concurrent map is not empty.

     Tests whether the concurrent map is not empty.

     returns

       `true` if the concurrent map contains at least one element, `false` otherwise.

     Definition Classes
       IterableOnceOps
     Annotations
       @deprecatedOverriding()
112.  final def notify(): Unit

     Wakes up a single thread that is waiting on the receiver object's monitor.

     Wakes up a single thread that is waiting on the receiver object's monitor.

     Definition Classes
       AnyRef
     Annotations
       @native()
     Note

       not specified by SLS as a member of AnyRef

113.  final def notifyAll(): Unit

     Wakes up all threads that are waiting on the receiver object's monitor.

     Wakes up all threads that are waiting on the receiver object's monitor.

     Definition Classes
       AnyRef
     Annotations
       @native()
     Note

       not specified by SLS as a member of AnyRef

114.  def orElse[A1 <: K, B1 >: V](that: PartialFunction[A1, B1]): PartialFunction[A1, B1]

     Composes this partial function with a fallback partial function which gets applied where this partial function is not defined.

     Composes this partial function with a fallback partial function which gets applied where this partial function is not defined.

     A1

       the argument type of the fallback function

     B1

       the result type of the fallback function

     that

       the fallback function

     returns

       a partial function which has as domain the union of the domains of this partial function and `that`. The resulting partial function takes `x` to `this(x)` where `this` is defined, and to `that(x)` where it is not.

     Definition Classes
       PartialFunction
115.  def partition(p: ((K, V)) => Boolean): (mutable.Map[K, V], mutable.Map[K, V])

     A pair of, first, all elements that satisfy predicate `p` and, second, all elements that do not.

     A pair of, first, all elements that satisfy predicate `p` and, second, all elements that do not. Interesting because it splits a collection in two.

     The default implementation provided here needs to traverse the collection twice. Strict collections have an overridden version of `partition` in `StrictOptimizedIterableOps`, which requires only a single traversal.

     Definition Classes
       IterableOps
116.  def partitionMap[A1, A2](f: ((K, V)) => Either[A1, A2]): (mutable.Iterable[A1], mutable.Iterable[A2])

     Applies a function `f` to each element of the concurrent map and returns a pair of concurrent maps: the first one made of those values returned by `f` that were wrapped in scala.util.Left, and the second one made of those wrapped in scala.util.Right.

     Applies a function `f` to each element of the concurrent map and returns a pair of concurrent maps: the first one made of those values returned by `f` that were wrapped in scala.util.Left, and the second one made of those wrapped in scala.util.Right.

     Example:

         val xs = `concurrent.Map`(1, "one", 2, "two", 3, "three") partitionMap {
          case i: Int => Left(i)
          case s: String => Right(s)
         }
         // xs == (`concurrent.Map`(1, 2, 3),
         //        `concurrent.Map`(one, two, three))

     A1

       the element type of the first resulting collection

     A2

       the element type of the second resulting collection

     f

       the 'split function' mapping the elements of this concurrent map to an scala.util.Either

     returns

       a pair of concurrent maps: the first one made of those values returned by `f` that were wrapped in scala.util.Left, and the second one made of those wrapped in scala.util.Right.

     Definition Classes
       IterableOps
117.  def product[B >: (K, V)](implicit num: math.Numeric[B]): B

     Multiplies up the elements of this collection.

     Multiplies up the elements of this collection.

     Note: will not terminate for infinite-sized collections.

     B

       the result type of the `*` operator.

     num

       an implicit parameter defining a set of numeric operations which includes the `*` operator to be used in forming the product.

     returns

       the product of all elements of this concurrent map with respect to the `*` operator in `num`.

     Definition Classes
       IterableOnceOps
118.  def put(key: K, value: V): Option[V]

     Adds a new key/value pair to this map and optionally returns previously bound value.

     Adds a new key/value pair to this map and optionally returns previously bound value. If the map already contains a mapping for the key, it will be overridden by the new value.

     key

       the key to update

     value

       the new value

     returns

       an option value containing the value associated with the key before the `put` operation was executed, or `None` if `key` was not defined in the map before.

     Definition Classes
       MapOps
119.  def reduce[B >: (K, V)](op: (B, B) => B): B

     Reduces the elements of this concurrent map using the specified associative binary operator.

     Reduces the elements of this concurrent map using the specified associative binary operator.

     The order in which operations are performed on elements is unspecified and may be nondeterministic.

     B

       A type parameter for the binary operator, a supertype of `A`.

     op

       A binary operator that must be associative.

     returns

       The result of applying reduce operator `op` between all the elements if the concurrent map is nonempty.

     Definition Classes
       IterableOnceOps
     Exceptions thrown

       `UnsupportedOperationException` if this concurrent map is empty.

120.  def reduceLeft[B >: (K, V)](op: (B, (K, V)) => B): B

     Applies a binary operator to all elements of this concurrent map, going left to right.

     Applies a binary operator to all elements of this concurrent map, going left to right.

     Note: will not terminate for infinite-sized collections.

     Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.

     B

       the result type of the binary operator.

     op

       the binary operator.

     returns

       the result of inserting `op` between consecutive elements of this concurrent map, going left to right: `op( op( ... op(x1, x2) ..., xn-1), xn)` where `x1, ..., xn` are the elements of this concurrent map.

     Definition Classes
       IterableOnceOps
     Exceptions thrown

       `UnsupportedOperationException` if this concurrent map is empty.

121.  def reduceLeftOption[B >: (K, V)](op: (B, (K, V)) => B): Option[B]

     Optionally applies a binary operator to all elements of this concurrent map, going left to right.

     Optionally applies a binary operator to all elements of this concurrent map, going left to right.

     Note: will not terminate for infinite-sized collections.

     Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.

     B

       the result type of the binary operator.

     op

       the binary operator.

     returns

       an option value containing the result of `reduceLeft(op)` if this concurrent map is nonempty, `None` otherwise.

     Definition Classes
       IterableOnceOps
122.  def reduceOption[B >: (K, V)](op: (B, B) => B): Option[B]

     Reduces the elements of this concurrent map, if any, using the specified associative binary operator.

     Reduces the elements of this concurrent map, if any, using the specified associative binary operator.

     The order in which operations are performed on elements is unspecified and may be nondeterministic.

     B

       A type parameter for the binary operator, a supertype of `A`.

     op

       A binary operator that must be associative.

     returns

       An option value containing result of applying reduce operator `op` between all the elements if the collection is nonempty, and `None` otherwise.

     Definition Classes
       IterableOnceOps
123.  def reduceRight[B >: (K, V)](op: ((K, V), B) => B): B

     Applies a binary operator to all elements of this concurrent map, going right to left.

     Applies a binary operator to all elements of this concurrent map, going right to left.

     Note: will not terminate for infinite-sized collections.

     Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.

     B

       the result type of the binary operator.

     op

       the binary operator.

     returns

       the result of inserting `op` between consecutive elements of this concurrent map, going right to left: `op(x1, op(x2, ..., op(xn-1, xn)...))` where `x1, ..., xn` are the elements of this concurrent map.

     Definition Classes
       IterableOnceOps
     Exceptions thrown

       `UnsupportedOperationException` if this concurrent map is empty.

124.  def reduceRightOption[B >: (K, V)](op: ((K, V), B) => B): Option[B]

     Optionally applies a binary operator to all elements of this concurrent map, going right to left.

     Optionally applies a binary operator to all elements of this concurrent map, going right to left.

     Note: will not terminate for infinite-sized collections.

     Note: might return different results for different runs, unless the underlying collection type is ordered or the operator is associative and commutative.

     B

       the result type of the binary operator.

     op

       the binary operator.

     returns

       an option value containing the result of `reduceRight(op)` if this concurrent map is nonempty, `None` otherwise.

     Definition Classes
       IterableOnceOps
125.  def remove(key: K): Option[V]

     Removes a key from this map, returning the value associated previously with that key as an option.

     Removes a key from this map, returning the value associated previously with that key as an option.

     key

       the key to be removed

     returns

       an option value containing the value associated previously with `key`, or `None` if `key` was not defined in the map before.

     Definition Classes
       MapOps
126.  def result(): mutable.Map[K, V]

     Result collection consisting of all elements appended so far.

     Result collection consisting of all elements appended so far.

     Definition Classes
       MapOps → Builder
127.  def reversed: Iterable[(K, V)]
     Attributes
       protected
     Definition Classes
       IterableOnceOps
128.  def runWith[U](action: (V) => U): (K) => Boolean

     Composes this partial function with an action function which gets applied to results of this partial function.

     Composes this partial function with an action function which gets applied to results of this partial function. The action function is invoked only for its side effects; its result is ignored.

     Note that expression `pf.runWith(action)(x)` is equivalent to

         if(pf isDefinedAt x) { action(pf(x)); true } else false

     except that `runWith` is implemented via `applyOrElse` and thus potentially more efficient. Using `runWith` avoids double evaluation of pattern matchers and guards for partial function literals.

     action

       the action function

     returns

       a function which maps arguments `x` to `isDefinedAt(x)`. The resulting function runs `action(this(x))` where `this` is defined.

     Definition Classes
       PartialFunction
     See also

       `applyOrElse`.

129.  def scan[B >: (K, V)](z: B)(op: (B, B) => B): mutable.Iterable[B]

     Computes a prefix scan of the elements of the collection.

     Computes a prefix scan of the elements of the collection.

     Note: The neutral element `z` may be applied more than once.

     B

       element type of the resulting collection

     z

       neutral element for the operator `op`

     op

       the associative operator for the scan

     returns

       a new concurrent map containing the prefix scan of the elements in this concurrent map

     Definition Classes
       IterableOps
130.  def scanLeft[B](z: B)(op: (B, (K, V)) => B): mutable.Iterable[B]

     Produces a concurrent map containing cumulative results of applying the operator going left to right, including the initial value.

     Produces a concurrent map containing cumulative results of applying the operator going left to right, including the initial value.

     Note: will not terminate for infinite-sized collections.

     Note: might return different results for different runs, unless the underlying collection type is ordered.

     B

       the type of the elements in the resulting collection

     z

       the initial value

     op

       the binary operator applied to the intermediate result and the element

     returns

       collection with intermediate results

     Definition Classes
       IterableOps → IterableOnceOps
131.  def scanRight[B](z: B)(op: ((K, V), B) => B): mutable.Iterable[B]

     Produces a collection containing cumulative results of applying the operator going right to left.

     Produces a collection containing cumulative results of applying the operator going right to left. The head of the collection is the last cumulative result.

     Note: will not terminate for infinite-sized collections.

     Note: might return different results for different runs, unless the underlying collection type is ordered.

     Note: Even when applied to a view or a lazy collection it will always force the elements.

     Example:

         List(1, 2, 3, 4).scanRight(0)(_ + _) == List(10, 9, 7, 4, 0)

     B

       the type of the elements in the resulting collection

     z

       the initial value

     op

       the binary operator applied to the intermediate result and the element

     returns

       collection with intermediate results

     Definition Classes
       IterableOps
132.  def size: Int

     The size of this concurrent map.

     The size of this concurrent map.

     Note: will not terminate for infinite-sized collections.

     returns

       the number of elements in this concurrent map.

     Definition Classes
       IterableOnceOps
133.  def sizeCompare(that: Iterable[_]): Int

     Compares the size of this concurrent map to the size of another `Iterable`.

     Compares the size of this concurrent map to the size of another `Iterable`.

     that

       the `Iterable` whose size is compared with this concurrent map's size.

     returns

       A value `x` where

           x <  0       if this.size <  that.size
           x == 0       if this.size == that.size
           x >  0       if this.size >  that.size

       The method as implemented here does not call `size` directly; its running time is `O(this.size min that.size)` instead of `O(this.size + that.size)`. The method should be overridden if computing `size` is cheap and `knownSize` returns `-1`.

     Definition Classes
       IterableOps
134.  def sizeCompare(otherSize: Int): Int

     Compares the size of this concurrent map to a test value.

     Compares the size of this concurrent map to a test value.

     otherSize

       the test value that gets compared with the size.

     returns

       A value `x` where

           x <  0       if this.size <  otherSize
           x == 0       if this.size == otherSize
           x >  0       if this.size >  otherSize

       The method as implemented here does not call `size` directly; its running time is `O(size min otherSize)` instead of `O(size)`. The method should be overridden if computing `size` is cheap and `knownSize` returns `-1`.

     Definition Classes
       IterableOps
     See also

       sizeIs

135.  final def sizeHint(coll: IterableOnce[_], delta: Int = 0): Unit

     Gives a hint that one expects the `result` of this builder to have the same size as the given collection, plus some delta.

     Gives a hint that one expects the `result` of this builder to have the same size as the given collection, plus some delta. This will provide a hint only if the collection has a known size Some builder classes will optimize their representation based on the hint. However, builder implementations are still required to work correctly even if the hint is wrong, i.e. a different number of elements is added.

     coll

       the collection which serves as a hint for the result's size.

     delta

       a correction to add to the `coll.size` to produce the size hint.

     Definition Classes
       Builder
136.  def sizeHint(size: Int): Unit

     Gives a hint how many elements are expected to be added when the next `result` is called.

     Gives a hint how many elements are expected to be added when the next `result` is called. Some builder classes will optimize their representation based on the hint. However, builder implementations are still required to work correctly even if the hint is wrong, i.e. a different number of elements is added.

     size

       the hint how many elements will be added.

     Definition Classes
       Builder
137.  final def sizeHintBounded(size: Int, boundingColl: Iterable[_]): Unit

     Gives a hint how many elements are expected to be added when the next `result` is called, together with an upper bound given by the size of some other collection.

     Gives a hint how many elements are expected to be added when the next `result` is called, together with an upper bound given by the size of some other collection. Some builder classes will optimize their representation based on the hint. However, builder implementations are still required to work correctly even if the hint is wrong, i.e. a different number of elements is added.

     size

       the hint how many elements will be added.

     boundingColl

       the bounding collection. If it is an IndexedSeqLike, then sizes larger than collection's size are reduced.

     Definition Classes
       Builder
138.  final def sizeIs: SizeCompareOps

     Returns a value class containing operations for comparing the size of this concurrent map to a test value.

     Returns a value class containing operations for comparing the size of this concurrent map to a test value.

     These operations are implemented in terms of `sizeCompare(Int)`, and allow the following more readable usages:

         this.sizeIs < size     // this.sizeCompare(size) < 0
         this.sizeIs <= size    // this.sizeCompare(size) <= 0
         this.sizeIs == size    // this.sizeCompare(size) == 0
         this.sizeIs != size    // this.sizeCompare(size) != 0
         this.sizeIs >= size    // this.sizeCompare(size) >= 0
         this.sizeIs > size     // this.sizeCompare(size) > 0

     Definition Classes
       IterableOps
     Annotations
       @inline()
139.  def slice(from: Int, until: Int): mutable.Map[K, V]

     Selects an interval of elements.

     Selects an interval of elements. The returned concurrent map is made up of all elements `x` which satisfy the invariant:

         from <= indexOf(x) < until

     Note: might return different results for different runs, unless the underlying collection type is ordered.

     from

       the lowest index to include from this concurrent map.

     until

       the lowest index to EXCLUDE from this concurrent map.

     returns

       a concurrent map containing the elements greater than or equal to index `from` extending up to (but not including) index `until` of this concurrent map.

     Definition Classes
       IterableOps → IterableOnceOps
140.  def sliding(size: Int, step: Int): Iterator[mutable.Map[K, V]]

     Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.)

     Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.)

     The returned iterator will be empty when called on an empty collection. The last element the iterator produces may be smaller than the window size when the original collection isn't exhausted by the window before it and its last element isn't skipped by the step before it.

     size

       the number of elements per group

     step

       the distance between the first elements of successive groups

     returns

       An iterator producing concurrent maps of size `size`, except the last element (which may be the only element) will be smaller if there are fewer than `size` elements remaining to be grouped.

     Definition Classes
       IterableOps
     Examples:

     1. `List(1, 2, 3, 4, 5).sliding(2, 2) = Iterator(List(1, 2), List(3, 4), List(5))`

     ,

     2. `List(1, 2, 3, 4, 5, 6).sliding(2, 3) = Iterator(List(1, 2), List(4, 5))`

     See also

       scala.collection.Iterator, method `sliding`

141.  def sliding(size: Int): Iterator[mutable.Map[K, V]]

     Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in `grouped`.)

     Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in `grouped`.)

     An empty collection returns an empty iterator, and a non-empty collection containing fewer elements than the window size returns an iterator that will produce the original collection as its only element.

     size

       the number of elements per group

     returns

       An iterator producing concurrent maps of size `size`, except for a non-empty collection with less than `size` elements, which returns an iterator that produces the source collection itself as its only element.

     Definition Classes
       IterableOps
     Examples:

     1. `List().sliding(2) = empty iterator`

     ,

     2. `List(1).sliding(2) = Iterator(List(1))`

     ,

     3. `List(1, 2).sliding(2) = Iterator(List(1, 2))`

     ,

     4. `List(1, 2, 3).sliding(2) = Iterator(List(1, 2), List(2, 3))`

     See also

       scala.collection.Iterator, method `sliding`

142.  def span(p: ((K, V)) => Boolean): (mutable.Map[K, V], mutable.Map[K, V])

     Splits this concurrent map into a prefix/suffix pair according to a predicate.

     Splits this concurrent map into a prefix/suffix pair according to a predicate.

     Note: `c span p` is equivalent to (but possibly more efficient than) `(c takeWhile p, c dropWhile p)`, provided the evaluation of the predicate `p` does not cause any side-effects.

     Note: might return different results for different runs, unless the underlying collection type is ordered.

     p

       the test predicate

     returns

       a pair consisting of the longest prefix of this concurrent map whose elements all satisfy `p`, and the rest of this concurrent map.

     Definition Classes
       IterableOps → IterableOnceOps
143.  def splitAt(n: Int): (mutable.Map[K, V], mutable.Map[K, V])

     Splits this concurrent map into a prefix/suffix pair at a given position.

     Splits this concurrent map into a prefix/suffix pair at a given position.

     Note: `c splitAt n` is equivalent to (but possibly more efficient than) `(c take n, c drop n)`.

     Note: might return different results for different runs, unless the underlying collection type is ordered.

     n

       the position at which to split.

     returns

       a pair of concurrent maps consisting of the first `n` elements of this concurrent map, and the other elements.

     Definition Classes
       IterableOps → IterableOnceOps
144.  def stepper[S <: Stepper[_]](implicit shape: StepperShape[(K, V), S]): S

     Returns a scala.collection.Stepper for the elements of this collection.

     Returns a scala.collection.Stepper for the elements of this collection.

     The Stepper enables creating a Java stream to operate on the collection, see scala.jdk.StreamConverters. For collections holding primitive values, the Stepper can be used as an iterator which doesn't box the elements.

     The implicit scala.collection.StepperShape parameter defines the resulting Stepper type according to the element type of this collection.

     - For collections of `Int`, `Short`, `Byte` or `Char`, an scala.collection.IntStepper is returned
     - For collections of `Double` or `Float`, a scala.collection.DoubleStepper is returned
     - For collections of `Long` a scala.collection.LongStepper is returned
     - For any other element type, an scala.collection.AnyStepper is returned

     Note that this method is overridden in subclasses and the return type is refined to `S with EfficientSplit`, for example scala.collection.IndexedSeqOps.stepper. For Steppers marked with scala.collection.Stepper.EfficientSplit, the converters in scala.jdk.StreamConverters allow creating parallel streams, whereas bare Steppers can be converted only to sequential streams.

     Definition Classes
       IterableOnce
145.  def stringPrefix: String
     Attributes
       protected[this]
     Definition Classes
       Map → Iterable
     Annotations
       @nowarn()
146.  def subtractAll(xs: IterableOnce[K]): Map.this.type

     Removes all elements produced by an iterator from this concurrent map.

     Removes all elements produced by an iterator from this concurrent map.

     xs

       the iterator producing the elements to remove.

     returns

       the concurrent map itself

     Definition Classes
       Shrinkable
147.  def sum[B >: (K, V)](implicit num: math.Numeric[B]): B

     Sums up the elements of this collection.

     Sums up the elements of this collection.

     Note: will not terminate for infinite-sized collections.

     B

       the result type of the `+` operator.

     num

       an implicit parameter defining a set of numeric operations which includes the `+` operator to be used in forming the sum.

     returns

       the sum of all elements of this concurrent map with respect to the `+` operator in `num`.

     Definition Classes
       IterableOnceOps
148.  final def synchronized[T0](arg0: => T0): T0

     Executes the code in `body` with an exclusive lock on `this`.

     Executes the code in `body` with an exclusive lock on `this`.

     returns

       the result of `body`

     Definition Classes
       AnyRef
149.  def tail: mutable.Map[K, V]

     The rest of the collection without its first element.

     The rest of the collection without its first element.

     Definition Classes
       IterableOps
150.  def tails: Iterator[mutable.Map[K, V]]

     Iterates over the tails of this concurrent map.

     Iterates over the tails of this concurrent map. The first value will be this concurrent map and the final one will be an empty concurrent map, with the intervening values the results of successive applications of `tail`.

     returns

       an iterator over all the tails of this concurrent map

     Definition Classes
       IterableOps
     Example:

     1. `List(1,2,3).tails = Iterator(List(1,2,3), List(2,3), List(3), Nil)`

151.  def take(n: Int): mutable.Map[K, V]

     Selects the first n elements.

     Selects the first n elements.

     Note: might return different results for different runs, unless the underlying collection type is ordered.

     n

       the number of elements to take from this concurrent map.

     returns

       a concurrent map consisting only of the first `n` elements of this concurrent map, or else the whole concurrent map, if it has less than `n` elements. If `n` is negative, returns an empty concurrent map.

     Definition Classes
       IterableOps → IterableOnceOps
152.  def takeRight(n: Int): mutable.Map[K, V]

     Selects the last n elements.

     Selects the last n elements.

     Note: might return different results for different runs, unless the underlying collection type is ordered.

     n

       the number of elements to take from this concurrent map.

     returns

       a concurrent map consisting only of the last `n` elements of this concurrent map, or else the whole concurrent map, if it has less than `n` elements. If `n` is negative, returns an empty concurrent map.

     Definition Classes
       IterableOps
153.  def takeWhile(p: ((K, V)) => Boolean): mutable.Map[K, V]

     Takes longest prefix of elements that satisfy a predicate.

     Takes longest prefix of elements that satisfy a predicate.

     Note: might return different results for different runs, unless the underlying collection type is ordered.

     p

       The predicate used to test elements.

     returns

       the longest prefix of this concurrent map whose elements all satisfy the predicate `p`.

     Definition Classes
       IterableOps → IterableOnceOps
154.  def tapEach[U](f: ((K, V)) => U): mutable.Map[K, V]

     Applies a side-effecting function to each element in this collection.

     Applies a side-effecting function to each element in this collection. Strict collections will apply `f` to their elements immediately, while lazy collections like Views and LazyLists will only apply `f` on each element if and when that element is evaluated, and each time that element is evaluated.

     U

       the return type of f

     f

       a function to apply to each element in this concurrent map

     returns

       The same logical collection as this

     Definition Classes
       IterableOps → IterableOnceOps
155.  def to[C1](factory: Factory[(K, V), C1]): C1

     Given a collection factory `factory`, convert this collection to the appropriate representation for the current element type `A`.

     Given a collection factory `factory`, convert this collection to the appropriate representation for the current element type `A`. Example uses:

     xs.to(List) xs.to(ArrayBuffer) xs.to(BitSet) // for xs: Iterable[Int]

     Definition Classes
       IterableOnceOps
156.  def toArray[B >: (K, V)](implicit arg0: ClassTag[B]): Array[B]

     Convert collection to array.

     Convert collection to array.

     Implementation note: DO NOT call Array.from from this method.

     Definition Classes
       IterableOnceOps
157.  final def toBuffer[B >: (K, V)]: Buffer[B]
     Definition Classes
       IterableOnceOps
     Annotations
       @inline()
158.  def toIndexedSeq: immutable.IndexedSeq[(K, V)]
     Definition Classes
       IterableOnceOps
159.  def toList: immutable.List[(K, V)]
     Definition Classes
       IterableOnceOps
160.  def toMap[K, V](implicit ev: <:<[(K, V), (K, V)]): immutable.Map[K, V]
     Definition Classes
       IterableOnceOps
161.  def toSeq: immutable.Seq[(K, V)]

     returns

       This collection as a `Seq[A]`. This is equivalent to `to(Seq)` but might be faster.

     Definition Classes
       IterableOnceOps
162.  def toSet[B >: (K, V)]: immutable.Set[B]
     Definition Classes
       IterableOnceOps
163.  def toString(): String

     Creates a String representation of this object.

     Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.

     returns

       a String representation of the object.

     Definition Classes
       Map → Function1 → Iterable → AnyRef → Any
164.  def toVector: immutable.Vector[(K, V)]
     Definition Classes
       IterableOnceOps
165.  def transpose[B](implicit asIterable: ((K, V)) => Iterable[B]): mutable.Iterable[mutable.Iterable[B]]

     Transposes this concurrent map of iterable collections into a concurrent map of concurrent maps.

     Transposes this concurrent map of iterable collections into a concurrent map of concurrent maps.

     The resulting collection's type will be guided by the static type of concurrent map. For example:

         val xs = List(
                    Set(1, 2, 3),
                    Set(4, 5, 6)).transpose
         // xs == List(
         //         List(1, 4),
         //         List(2, 5),
         //         List(3, 6))

         val ys = Vector(
                    List(1, 2, 3),
                    List(4, 5, 6)).transpose
         // ys == Vector(
         //         Vector(1, 4),
         //         Vector(2, 5),
         //         Vector(3, 6))

     Note: Even when applied to a view or a lazy collection it will always force the elements.

     B

       the type of the elements of each iterable collection.

     asIterable

       an implicit conversion which asserts that the element type of this concurrent map is an `Iterable`.

     returns

       a two-dimensional concurrent map of concurrent maps which has as nth row the nth column of this concurrent map.

     Definition Classes
       IterableOps
     Exceptions thrown

       `IllegalArgumentException` if all collections in this concurrent map are not of the same size.

166.  def unapply(a: K): Option[V]

     Tries to extract a `B` from an `A` in a pattern matching expression.

     Tries to extract a `B` from an `A` in a pattern matching expression.

     Definition Classes
       PartialFunction
167.  def unlift: PartialFunction[K, B]

     Converts an optional function to a partial function.

     Converts an optional function to a partial function.

     Implicit
       This member is added by an implicit conversion from Map[K, V] toUnliftOps[K, B] performed by method UnliftOps in scala.Function1.This conversion will take place only if V is a subclass of Option[B] (V <: Option[B]).
     Definition Classes
       UnliftOps
     Example:

     1. Unlike Function.unlift, this UnliftOps.unlift method can be used in extractors.

            val of: Int => Option[String] = { i =>
              if (i == 2) {
                Some("matched by an optional function")
              } else {
                None
              }
            }

            util.Random.nextInt(4) match {
              case of.unlift(m) => // Convert an optional function to a pattern
                println(m)
              case _ =>
                println("Not matched")
            }

168.  def unzip[A1, A2](implicit asPair: ((K, V)) => (A1, A2)): (mutable.Iterable[A1], mutable.Iterable[A2])

     Converts this concurrent map of pairs into two collections of the first and second half of each pair.

     Converts this concurrent map of pairs into two collections of the first and second half of each pair.

         val xs = `concurrent.Map`(
                    (1, "one"),
                    (2, "two"),
                    (3, "three")).unzip
         // xs == (`concurrent.Map`(1, 2, 3),
         //        `concurrent.Map`(one, two, three))

     A1

       the type of the first half of the element pairs

     A2

       the type of the second half of the element pairs

     asPair

       an implicit conversion which asserts that the element type of this concurrent map is a pair.

     returns

       a pair of concurrent maps, containing the first, respectively second half of each element pair of this concurrent map.

     Definition Classes
       IterableOps
169.  def unzip3[A1, A2, A3](implicit asTriple: ((K, V)) => (A1, A2, A3)): (mutable.Iterable[A1], mutable.Iterable[A2], mutable.Iterable[A3])

     Converts this concurrent map of triples into three collections of the first, second, and third element of each triple.

     Converts this concurrent map of triples into three collections of the first, second, and third element of each triple.

         val xs = `concurrent.Map`(
                    (1, "one", '1'),
                    (2, "two", '2'),
                    (3, "three", '3')).unzip3
         // xs == (`concurrent.Map`(1, 2, 3),
         //        `concurrent.Map`(one, two, three),
         //        `concurrent.Map`(1, 2, 3))

     A1

       the type of the first member of the element triples

     A2

       the type of the second member of the element triples

     A3

       the type of the third member of the element triples

     asTriple

       an implicit conversion which asserts that the element type of this concurrent map is a triple.

     returns

       a triple of concurrent maps, containing the first, second, respectively third member of each element triple of this concurrent map.

     Definition Classes
       IterableOps
170.  def update(key: K, value: V): Unit

     Adds a new key/value pair to this map.

     Adds a new key/value pair to this map. If the map already contains a mapping for the key, it will be overridden by the new value.

     key

       The key to update

     value

       The new value

     Definition Classes
       MapOps
171.  def updateWith(key: K)(remappingFunction: (Option[V]) => Option[V]): Option[V]

     Update a mapping for the specified key and its current optionally-mapped value (`Some` if there is current mapping, `None` if not).

     Update a mapping for the specified key and its current optionally-mapped value (`Some` if there is current mapping, `None` if not).

     If the remapping function returns `Some(v)`, the mapping is updated with the new value `v`. If the remapping function returns `None`, the mapping is removed (or remains absent if initially absent). If the function itself throws an exception, the exception is rethrown, and the current mapping is left unchanged.

     If the map is updated by another concurrent access, the remapping function will be retried until successfully updated.

     key

       the key value

     remappingFunction

       a partial function that receives current optionally-mapped value and return a new mapping

     returns

       the new value associated with the specified key

     Definition Classes
       Map → MapOps
172.  def valueStepper[S <: Stepper[_]](implicit shape: StepperShape[V, S]): S

     Returns a Stepper for the values of this map.

     Returns a Stepper for the values of this map. See method stepper.

     Definition Classes
       MapOps
173.  def values: Iterable[V]

     Collects all values of this map in an iterable collection.

     Collects all values of this map in an iterable collection.

     returns

       the values of this map as an iterable.

     Definition Classes
       MapOps
174.  def valuesIterator: Iterator[V]

     Creates an iterator for all values in this map.

     Creates an iterator for all values in this map.

     returns

       an iterator over all values that are associated with some key in this map.

     Definition Classes
       MapOps
175.  def view: MapView[K, V]

     A view over the elements of this collection.

     A view over the elements of this collection.

     Definition Classes
       MapOps → IterableOps
176.  final def wait(): Unit

     See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait--.

     See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait--.

     Definition Classes
       AnyRef
     Annotations
       @throws(classOf[java.lang.InterruptedException])
     Note

       not specified by SLS as a member of AnyRef

177.  final def wait(arg0: Long, arg1: Int): Unit

     See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-int-

     See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-int-

     Definition Classes
       AnyRef
     Annotations
       @throws(classOf[java.lang.InterruptedException])
     Note

       not specified by SLS as a member of AnyRef

178.  final def wait(arg0: Long): Unit

     See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-.

     See https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-.

     Definition Classes
       AnyRef
     Annotations
       @throws(classOf[java.lang.InterruptedException]) @native()
     Note

       not specified by SLS as a member of AnyRef

179.  def withDefault(d: (K) => V): mutable.Map[K, V]

     The same map with a given default function.

     The same map with a given default function. Note: The default is only used for `apply`. Other methods like `get`, `contains`, `iterator`, `keys`, etc. are not affected by `withDefaultValue`.

     Invoking transformer methods (e.g. `map`) will not preserve the default value.

     d

       the function mapping keys to values, used for non-present keys

     returns

       a wrapper of the map with a default value

     Definition Classes
       Map
180.  def withDefaultValue(d: V): mutable.Map[K, V]

     The same map with a given default value.

     The same map with a given default value. Note: The default is only used for `apply`. Other methods like `get`, `contains`, `iterator`, `keys`, etc. are not affected by `withDefaultValue`.

     Invoking transformer methods (e.g. `map`) will not preserve the default value.

     d

       default value used for non-present keys

     returns

       a wrapper of the map with a default value

     Definition Classes
       Map
181.  def withFilter(p: ((K, V)) => Boolean): MapOps.WithFilter[K, V, [x]mutable.Iterable[x], [x, y]mutable.Map[x, y]]

     Creates a non-strict filter of this concurrent map.

     Creates a non-strict filter of this concurrent map.

     Note: the difference between `c filter p` and `c withFilter p` is that the former creates a new collection, whereas the latter only restricts the domain of subsequent `map`, `flatMap`, `foreach`, and `withFilter` operations.

     Note: might return different results for different runs, unless the underlying collection type is ordered.

     p

       the predicate used to test elements.

     returns

       an object of class `WithFilter`, which supports `map`, `flatMap`, `foreach`, and `withFilter` operations. All these operations apply to those elements of this concurrent map which satisfy the predicate `p`.

     Definition Classes
       MapFactoryDefaults → IterableOps
182.  def zip[B](that: IterableOnce[B]): mutable.Iterable[((K, V), B)]

     Returns a concurrent map formed from this concurrent map and another iterable collection by combining corresponding elements in pairs.

     Returns a concurrent map formed from this concurrent map and another iterable collection by combining corresponding elements in pairs. If one of the two collections is longer than the other, its remaining elements are ignored.

     B

       the type of the second half of the returned pairs

     that

       The iterable providing the second half of each result pair

     returns

       a new concurrent map containing pairs consisting of corresponding elements of this concurrent map and `that`. The length of the returned collection is the minimum of the lengths of this concurrent map and `that`.

     Definition Classes
       IterableOps
183.  def zipAll[A1 >: (K, V), B](that: Iterable[B], thisElem: A1, thatElem: B): mutable.Iterable[(A1, B)]

     Returns a concurrent map formed from this concurrent map and another iterable collection by combining corresponding elements in pairs.

     Returns a concurrent map formed from this concurrent map and another iterable collection by combining corresponding elements in pairs. If one of the two collections is shorter than the other, placeholder elements are used to extend the shorter collection to the length of the longer.

     that

       the iterable providing the second half of each result pair

     thisElem

       the element to be used to fill up the result if this concurrent map is shorter than `that`.

     thatElem

       the element to be used to fill up the result if `that` is shorter than this concurrent map.

     returns

       a new collection of type `That` containing pairs consisting of corresponding elements of this concurrent map and `that`. The length of the returned collection is the maximum of the lengths of this concurrent map and `that`. If this concurrent map is shorter than `that`, `thisElem` values are used to pad the result. If `that` is shorter than this concurrent map, `thatElem` values are used to pad the result.

     Definition Classes
       IterableOps
184.  def zipWithIndex: mutable.Iterable[((K, V), Int)]

     Zips this concurrent map with its indices.

     Zips this concurrent map with its indices.

     returns

       A new concurrent map containing pairs consisting of all elements of this concurrent map paired with their index. Indices start at `0`.

     Definition Classes
       IterableOps → IterableOnceOps
     Example:

     1. `List("a", "b", "c").zipWithIndex == List(("a", 0), ("b", 1), ("c", 2))`

### Shadowed Implicit Value Members

1.  def +(other: String): String
   Implicit
     This member is added by an implicit conversion from Map[K, V] toany2stringadd[Map[K, V]] performed by method any2stringadd in scala.Predef.
   Shadowing
     This implicitly inherited member is shadowed by one or more members in this class.
     To access this member you can use a type ascription:

         (map: any2stringadd[Map[K, V]]).+(other)

   Definition Classes
     any2stringadd

### Deprecated Value Members

1.  def +[V1 >: V](elem1: (K, V1), elem2: (K, V1), elems: (K, V1)*): mutable.Map[K, V1]
   Definition Classes
     MapOps
   Annotations
     @deprecated
   Deprecated

     (Since version 2.13.0) Use ++ with an explicit collection argument instead of + with varargs

2.  def +[V1 >: V](kv: (K, V1)): mutable.Map[K, V1]
   Definition Classes
     MapOps
   Annotations
     @deprecated
   Deprecated

     (Since version 2.13.0) Consider requiring an immutable Map or fall back to Map.concat.

3.  def ++:[V1 >: V](that: IterableOnce[(K, V1)]): mutable.Map[K, V1]
   Definition Classes
     MapOps
   Annotations
     @deprecated
   Deprecated

     (Since version 2.13.0) Use ++ instead of ++: for collections of type Iterable

4.  def ++:[B >: (K, V)](that: IterableOnce[B]): mutable.Iterable[B]
   Definition Classes
     IterableOps
   Annotations
     @deprecated
   Deprecated

     (Since version 2.13.0) Use ++ instead of ++: for collections of type Iterable

5.  final def +=(elem1: (K, V), elem2: (K, V), elems: (K, V)*): Map.this.type

   Adds two or more elements to this concurrent map.

   Adds two or more elements to this concurrent map.

   elem1

     the first element to add.

   elem2

     the second element to add.

   elems

     the remaining elements to add.

   returns

     the concurrent map itself

   Definition Classes
     Growable
   Annotations
     @deprecated @inline()
   Deprecated

     (Since version 2.13.0) Use `++=` aka `addAll` instead of varargs `+=`; infix operations with an operand of multiple args will be deprecated

6.  final def -(key1: K, key2: K, keys: K*): mutable.Map[K, V]
   Definition Classes
     MapOps
   Annotations
     @deprecated
   Deprecated

     (Since version 2.13.0) Use -- or removeAll on an immutable Map

7.  final def -(key: K): mutable.Map[K, V]
   Definition Classes
     MapOps
   Annotations
     @deprecated
   Deprecated

     (Since version 2.13.0) Use - or remove on an immutable Map

8.  def --(keys: IterableOnce[K]): mutable.Map[K, V]
   Definition Classes
     MapOps
   Annotations
     @deprecated @inline()
   Deprecated

     (Since version 2.13.0) Consider requiring an immutable Map.

9.  def -=(elem1: K, elem2: K, elems: K*): Map.this.type

   Removes two or more elements from this concurrent map.

   Removes two or more elements from this concurrent map.

   elem1

     the first element to remove.

   elem2

     the second element to remove.

   elems

     the remaining elements to remove.

   returns

     the concurrent map itself

   Definition Classes
     Shrinkable
   Annotations
     @deprecated
   Deprecated

     (Since version 2.13.3) Use `--=` aka `subtractAll` instead of varargs `-=`; infix operations with an operand of multiple args will be deprecated

10.  def /:[B](z: B)(op: (B, (K, V)) => B): B
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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          (map: IterableOnceExtensionMethods[(K, V)])./:(z)(op)

    Definition Classes
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    Deprecated

      (Since version 2.13.0) Use .iterator.foldLeft instead

11.  final def /:[B](z: B)(op: (B, (K, V)) => B): B
    Definition Classes
      IterableOnceOps
    Annotations
      @deprecated @inline()
    Deprecated

      (Since version 2.13.0) Use foldLeft instead of /:

12.  def :\[B](z: B)(op: ((K, V), B) => B): B
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      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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          (map: IterableOnceExtensionMethods[(K, V)]).:\(z)(op)

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      (Since version 2.13.0) Use .iterator.foldRight instead

13.  final def :\[B](z: B)(op: ((K, V), B) => B): B
    Definition Classes
      IterableOnceOps
    Annotations
      @deprecated @inline()
    Deprecated

      (Since version 2.13.0) Use foldRight instead of :\

14.  def aggregate[B](z: => B)(seqop: (B, (K, V)) => B, combop: (B, B) => B): B
    Definition Classes
      IterableOnceOps
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) `aggregate` is not relevant for sequential collections. Use `foldLeft(z)(seqop)` instead.

15.  def collectFirst[B](f: PartialFunction[(K, V), B]): Option[B]
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          (map: IterableOnceExtensionMethods[(K, V)]).collectFirst(f)

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      @deprecated
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      (Since version 2.13.0) Use .iterator.collectFirst(...) instead

16.  def companion: IterableFactory[[_]mutable.Iterable[_]]
    Definition Classes
      IterableOps
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      @deprecated @deprecatedOverriding() @inline()
    Deprecated

      (Since version 2.13.0) Use iterableFactory instead

17.  def copyToBuffer(dest: Buffer[(K, V)]): Unit
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      (Since version 2.13.0) Use .iterator.copyToBuffer(...) instead

18.  final def copyToBuffer[B >: (K, V)](dest: Buffer[B]): Unit
    Definition Classes
      IterableOnceOps
    Annotations
      @deprecated @inline()
    Deprecated

      (Since version 2.13.0) Use `dest ++= coll` instead

19.  def count(f: ((K, V)) => Boolean): Int
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          (map: IterableOnceExtensionMethods[(K, V)]).count(f)

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      (Since version 2.13.0) Use .iterator.count(...) instead

20.  def exists(f: ((K, V)) => Boolean): Boolean
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          (map: IterableOnceExtensionMethods[(K, V)]).exists(f)

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      (Since version 2.13.0) Use .iterator.exists(...) instead

21.  def filter(f: ((K, V)) => Boolean): Iterator[(K, V)]
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          (map: IterableOnceExtensionMethods[(K, V)]).filter(f)

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      (Since version 2.13.0) Use .iterator.filter(...) instead

22.  def filterKeys(p: (K) => Boolean): MapView[K, V]

    Filters this map by retaining only keys satisfying a predicate.

    Filters this map by retaining only keys satisfying a predicate.

    p

      the predicate used to test keys

    returns

      an immutable map consisting only of those key value pairs of this map where the key satisfies the predicate `p`. The resulting map wraps the original map without copying any elements.

    Definition Classes
      MapOps
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use .view.filterKeys(f). A future version will include a strict version of this method (for now, .view.filterKeys(p).toMap).

23.  def find(p: ((K, V)) => Boolean): Option[(K, V)]
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          (map: IterableOnceExtensionMethods[(K, V)]).find(p)

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      (Since version 2.13.0) Use .iterator.find instead

24.  def flatMap[B](f: ((K, V)) => IterableOnce[B]): IterableOnce[B]
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          (map: IterableOnceExtensionMethods[(K, V)]).flatMap(f)

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      (Since version 2.13.0) Use .iterator.flatMap instead or consider requiring an Iterable

25.  def fold[A1 >: A](z: A1)(op: (A1, A1) => A1): A1
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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          (map: IterableOnceExtensionMethods[(K, V)]).fold(z)(op)

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      (Since version 2.13.0) Use .iterator.fold instead

26.  def foldLeft[B](z: B)(op: (B, (K, V)) => B): B
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          (map: IterableOnceExtensionMethods[(K, V)]).foldLeft(z)(op)

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    Deprecated

      (Since version 2.13.0) Use .iterator.foldLeft instead

27.  def foldRight[B](z: B)(op: ((K, V), B) => B): B
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      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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          (map: IterableOnceExtensionMethods[(K, V)]).foldRight(z)(op)

    Definition Classes
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    Deprecated

      (Since version 2.13.0) Use .iterator.foldRight instead

28.  def forall(f: ((K, V)) => Boolean): Boolean
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          (map: IterableOnceExtensionMethods[(K, V)]).forall(f)

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      (Since version 2.13.0) Use .iterator.forall(...) instead

29.  def foreach[U](f: ((K, V)) => U): Unit
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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          (map: IterableOnceExtensionMethods[(K, V)]).foreach(f)

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    Deprecated

      (Since version 2.13.0) Use .iterator.foreach(...) instead

30.  def formatted(fmtstr: String): String

    Returns string formatted according to given `format` string.

    Returns string formatted according to given `format` string. Format strings are as for `String.format` (@see java.lang.String.format).

    Implicit
      This member is added by an implicit conversion from Map[K, V] toStringFormat[Map[K, V]] performed by method StringFormat in scala.Predef.
    Definition Classes
      StringFormat
    Annotations
      @deprecated @inline()
    Deprecated

      (Since version 2.12.16) Use `formatString.format(value)` instead of `value.formatted(formatString)`, or use the `f""` string interpolator. In Java 15 and later, `formatted` resolves to the new method in String which has reversed parameters.

31.  def hasDefiniteSize: Boolean

    Tests whether this concurrent map is known to have a finite size.

    Tests whether this concurrent map is known to have a finite size. All strict collections are known to have finite size. For a non-strict collection such as `Stream`, the predicate returns `true` if all elements have been computed. It returns `false` if the stream is not yet evaluated to the end. Non-empty Iterators usually return `false` even if they were created from a collection with a known finite size.

    Note: many collection methods will not work on collections of infinite sizes. The typical failure mode is an infinite loop. These methods always attempt a traversal without checking first that `hasDefiniteSize` returns `true`. However, checking `hasDefiniteSize` can provide an assurance that size is well-defined and non-termination is not a concern.

    returns

      `true` if this collection is known to have finite size, `false` otherwise.

    Definition Classes
      IterableOnceOps
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Check .knownSize instead of .hasDefiniteSize for more actionable information (see scaladoc for details)

    See also

      method `knownSize` for a more useful alternative

32.  def isEmpty: Boolean
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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          (map: IterableOnceExtensionMethods[(K, V)]).isEmpty

    Definition Classes
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      (Since version 2.13.0) Use .iterator.isEmpty instead

33.  def map[B](f: ((K, V)) => B): IterableOnce[B]
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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          (map: IterableOnceExtensionMethods[(K, V)]).map(f)

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      @deprecated
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      (Since version 2.13.0) Use .iterator.map instead or consider requiring an Iterable

34.  def mapValues[W](f: (V) => W): MapView[K, W]

    Transforms this map by applying a function to every retrieved value.

    Transforms this map by applying a function to every retrieved value.

    f

      the function used to transform values of this map.

    returns

      a map view which maps every key of this map to `f(this(key))`. The resulting map wraps the original map without copying any elements.

    Definition Classes
      MapOps
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use .view.mapValues(f). A future version will include a strict version of this method (for now, .view.mapValues(f).toMap).

35.  def max(implicit ord: math.Ordering[(K, V)]): (K, V)
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      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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          (map: IterableOnceExtensionMethods[(K, V)]).max(ord)

    Definition Classes
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      @deprecated
    Deprecated

      (Since version 2.13.0) Use .iterator.max instead

36.  def maxBy[B](f: ((K, V)) => B)(implicit cmp: math.Ordering[B]): (K, V)
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      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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      This implicitly inherited member is shadowed by one or more members in this class.
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          (map: IterableOnceExtensionMethods[(K, V)]).maxBy(f)(cmp)

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      (Since version 2.13.0) Use .iterator.maxBy(...) instead

37.  def min(implicit ord: math.Ordering[(K, V)]): (K, V)
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      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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          (map: IterableOnceExtensionMethods[(K, V)]).min(ord)

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      (Since version 2.13.0) Use .iterator.min instead

38.  def minBy[B](f: ((K, V)) => B)(implicit cmp: math.Ordering[B]): (K, V)
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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      This implicitly inherited member is shadowed by one or more members in this class.
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          (map: IterableOnceExtensionMethods[(K, V)]).minBy(f)(cmp)

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      (Since version 2.13.0) Use .iterator.minBy(...) instead

39.  def mkString: String
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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          (map: IterableOnceExtensionMethods[(K, V)]).mkString

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      (Since version 2.13.0) Use .iterator.mkString instead

40.  def mkString(sep: String): String
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      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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          (map: IterableOnceExtensionMethods[(K, V)]).mkString(sep)

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41.  def mkString(start: String, sep: String, end: String): String
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      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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          (map: IterableOnceExtensionMethods[(K, V)]).mkString(start, sep, end)

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      (Since version 2.13.0) Use .iterator.mkString instead

42.  def nonEmpty: Boolean
    Implicit
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          (map: IterableOnceExtensionMethods[(K, V)]).nonEmpty

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      (Since version 2.13.0) Use .iterator.nonEmpty instead

43.  def product(implicit num: math.Numeric[(K, V)]): (K, V)
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      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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          (map: IterableOnceExtensionMethods[(K, V)]).product(num)

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      (Since version 2.13.0) Use .iterator.product instead

44.  def reduce(f: ((K, V), (K, V)) => (K, V)): (K, V)
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          (map: IterableOnceExtensionMethods[(K, V)]).reduce(f)

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      (Since version 2.13.0) Use .iterator.reduce(...) instead

45.  def reduceLeft(f: ((K, V), (K, V)) => (K, V)): (K, V)
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      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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          (map: IterableOnceExtensionMethods[(K, V)]).reduceLeft(f)

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      (Since version 2.13.0) Use .iterator.reduceLeft(...) instead

46.  def reduceLeftOption(f: ((K, V), (K, V)) => (K, V)): Option[(K, V)]
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          (map: IterableOnceExtensionMethods[(K, V)]).reduceLeftOption(f)

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      (Since version 2.13.0) Use .iterator.reduceLeftOption(...) instead

47.  def reduceOption(f: ((K, V), (K, V)) => (K, V)): Option[(K, V)]
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          (map: IterableOnceExtensionMethods[(K, V)]).reduceOption(f)

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      (Since version 2.13.0) Use .iterator.reduceOption(...) instead

48.  def reduceRight(f: ((K, V), (K, V)) => (K, V)): (K, V)
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          (map: IterableOnceExtensionMethods[(K, V)]).reduceRight(f)

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      (Since version 2.13.0) Use .iterator.reduceRight(...) instead

49.  def reduceRightOption(f: ((K, V), (K, V)) => (K, V)): Option[(K, V)]
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      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
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          (map: IterableOnceExtensionMethods[(K, V)]).reduceRightOption(f)

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      (Since version 2.13.0) Use .iterator.reduceRightOption(...) instead

50.  final def repr: mutable.Map[K, V]
    Definition Classes
      IterableOps
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use coll instead of repr in a collection implementation, use the collection value itself from the outside

51.  final def retain(p: (K, V) => Boolean): Map.this.type
    Definition Classes
      MapOps
    Annotations
      @deprecated @inline()
    Deprecated

      (Since version 2.13.0) Use filterInPlace instead

52.  def sameElements[B >: A](that: IterableOnce[B]): Boolean
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Definition Classes
      IterableOnceExtensionMethods
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use .iterator.sameElements instead

53.  def seq: Map.this.type
    Definition Classes
      Iterable
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Iterable.seq always returns the iterable itself

54.  def size: Int
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (map: IterableOnceExtensionMethods[(K, V)]).size

    Definition Classes
      IterableOnceExtensionMethods
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use .iterator.size instead

55.  def sum(implicit num: math.Numeric[(K, V)]): (K, V)
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (map: IterableOnceExtensionMethods[(K, V)]).sum(num)

    Definition Classes
      IterableOnceExtensionMethods
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use .iterator.sum instead

56.  def to[C1](factory: Factory[(K, V), C1]): C1
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (map: IterableOnceExtensionMethods[(K, V)]).to(factory)

    Definition Classes
      IterableOnceExtensionMethods
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use .iterator.to(factory) instead

57.  def toArray[B >: A](implicit arg0: ClassTag[B]): Array[B]
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (map: IterableOnceExtensionMethods[(K, V)]).toArray(arg0)

    Definition Classes
      IterableOnceExtensionMethods
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use .iterator.toArray

58.  def toBuffer[B >: A]: Buffer[B]
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (map: IterableOnceExtensionMethods[(K, V)]).toBuffer

    Definition Classes
      IterableOnceExtensionMethods
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use .iterator.to(ArrayBuffer) instead

59.  def toIndexedSeq: IndexedSeq[(K, V)]
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (map: IterableOnceExtensionMethods[(K, V)]).toIndexedSeq

    Definition Classes
      IterableOnceExtensionMethods
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use .iterator.toIndexedSeq instead

60.  final def toIterable: Iterable[(K, V)]
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (map: IterableOnceExtensionMethods[(K, V)]).toIterable

    Definition Classes
      IterableOnceExtensionMethods
    Annotations
      @deprecated @inline()
    Deprecated

      (Since version 2.13.0) Use .iterator.to(Iterable) instead

61.  final def toIterable: Map.this.type

    returns

      This collection as an `Iterable[A]`. No new collection will be built if `this` is already an `Iterable[A]`.

    Definition Classes
      Iterable → IterableOps
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.7) toIterable is internal and will be made protected; its name is similar to `toList` or `toSeq`, but it doesn't copy non-immutable collections

62.  def toIterator: Iterator[(K, V)]
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (map: IterableOnceExtensionMethods[(K, V)]).toIterator

    Definition Classes
      IterableOnceExtensionMethods
    Annotations
      @deprecated @inline()
    Deprecated

      (Since version 2.13.0) Use .iterator instead

63.  final def toIterator: Iterator[(K, V)]
    Definition Classes
      IterableOnceOps
    Annotations
      @deprecated @inline()
    Deprecated

      (Since version 2.13.0) Use .iterator instead of .toIterator

64.  def toList: immutable.List[(K, V)]
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (map: IterableOnceExtensionMethods[(K, V)]).toList

    Definition Classes
      IterableOnceExtensionMethods
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use .iterator.to(List) instead

65.  def toMap[K, V](implicit ev: <:<[(K, V), (K, V)]): immutable.Map[K, V]
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (map: IterableOnceExtensionMethods[(K, V)]).toMap(ev)

    Definition Classes
      IterableOnceExtensionMethods
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use .iterator.to(Map) instead

66.  def toSeq: immutable.Seq[(K, V)]
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (map: IterableOnceExtensionMethods[(K, V)]).toSeq

    Definition Classes
      IterableOnceExtensionMethods
    Annotations
      @deprecated @inline()
    Deprecated

      (Since version 2.13.0) Use .iterator.to(Seq) instead

67.  def toSet[B >: A]: immutable.Set[B]
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (map: IterableOnceExtensionMethods[(K, V)]).toSet

    Definition Classes
      IterableOnceExtensionMethods
    Annotations
      @deprecated @inline()
    Deprecated

      (Since version 2.13.0) Use .iterator.to(Set) instead

68.  def toStream: immutable.Stream[(K, V)]
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (map: IterableOnceExtensionMethods[(K, V)]).toStream

    Definition Classes
      IterableOnceExtensionMethods
    Annotations
      @deprecated @inline()
    Deprecated

      (Since version 2.13.0) Use .iterator.to(LazyList) instead

69.  final def toStream: immutable.Stream[(K, V)]
    Definition Classes
      IterableOnceOps
    Annotations
      @deprecated @inline()
    Deprecated

      (Since version 2.13.0) Use .to(LazyList) instead of .toStream

70.  final def toTraversable: Traversable[(K, V)]
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (map: IterableOnceExtensionMethods[(K, V)]).toTraversable

    Definition Classes
      IterableOnceExtensionMethods
    Annotations
      @deprecated @inline()
    Deprecated

      (Since version 2.13.0) Use .iterator.to(Iterable) instead

71.  final def toTraversable: Traversable[(K, V)]

    Converts this concurrent map to an unspecified Iterable.

    Converts this concurrent map to an unspecified Iterable. Will return the same collection if this instance is already Iterable.

    returns

      An Iterable containing all elements of this concurrent map.

    Definition Classes
      IterableOps
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) toTraversable is internal and will be made protected; its name is similar to `toList` or `toSeq`, but it doesn't copy non-immutable collections

72.  def toVector: immutable.Vector[(K, V)]
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (map: IterableOnceExtensionMethods[(K, V)]).toVector

    Definition Classes
      IterableOnceExtensionMethods
    Annotations
      @deprecated @inline()
    Deprecated

      (Since version 2.13.0) Use .iterator.to(Vector) instead

73.  final def transform(f: (K, V) => V): Map.this.type
    Definition Classes
      MapOps
    Annotations
      @deprecated @inline()
    Deprecated

      (Since version 2.13.0) Use mapValuesInPlace instead

74.  def updated[V1 >: V](key: K, value: V1): mutable.Map[K, V1]
    Definition Classes
      MapOps
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use m.clone().addOne((k,v)) instead of m.updated(k, v)

75.  def view(from: Int, until: Int): View[(K, V)]

    A view over a slice of the elements of this collection.

    A view over a slice of the elements of this collection.

    Definition Classes
      IterableOps
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use .view.slice(from, until) instead of .view(from, until)

76.  def withFilter(f: ((K, V)) => Boolean): Iterator[(K, V)]
    Implicit
      This member is added by an implicit conversion from Map[K, V] toIterableOnceExtensionMethods[(K, V)] performed by method iterableOnceExtensionMethods in scala.collection.IterableOnce.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (map: IterableOnceExtensionMethods[(K, V)]).withFilter(f)

    Definition Classes
      IterableOnceExtensionMethods
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use .iterator.withFilter(...) instead

77.  def →[B](y: B): (Map[K, V], B)
    Implicit
      This member is added by an implicit conversion from Map[K, V] toArrowAssoc[Map[K, V]] performed by method ArrowAssoc in scala.Predef.This conversion will take place only if V is a subclass of Option[Nothing] (V <: Option[Nothing]).
    Definition Classes
      ArrowAssoc
    Annotations
      @deprecated
    Deprecated

      (Since version 2.13.0) Use `->` instead. If you still wish to display it as one character, consider using a font with programming ligatures such as Fira Code.

### Inherited from mutable.Map[K, V]

### Inherited from mutable.MapOps[K, V, mutable.Map, mutable.Map[K, V]]

### Inherited from Shrinkable[K]

### Inherited from Builder[(K, V), mutable.Map[K, V]]

### Inherited from Growable[(K, V)]

### Inherited from Clearable

### Inherited from mutable.Cloneable[mutable.Map[K, V]]

### Inherited from java.lang.Cloneable

### Inherited from collection.Map[K, V]

### Inherited from Equals

### Inherited from MapFactoryDefaults[K, V, [x, y]mutable.Map[x, y], [x]mutable.Iterable[x]]

### Inherited from MapOps[K, V, [_, _]mutable.Map[_, _], mutable.Map[K, V]]

### Inherited from PartialFunction[K, V]

### Inherited from (K) => V

### Inherited from mutable.Iterable[(K, V)]

### Inherited from Iterable[(K, V)]

### Inherited from IterableFactoryDefaults[(K, V), [x]mutable.Iterable[x]]

### Inherited from IterableOps[(K, V), [_]mutable.Iterable[_], mutable.Map[K, V]]

### Inherited from IterableOnceOps[(K, V), [_]mutable.Iterable[_], mutable.Map[K, V]]

### Inherited from IterableOnce[(K, V)]

### Inherited from AnyRef

### Inherited from Any

### Inherited by implicit conversion UnliftOps fromMap[K, V] to UnliftOps[K, B]

### Inherited by implicit conversion iterableOnceExtensionMethods fromMap[K, V] to IterableOnceExtensionMethods[(K, V)]

### Inherited by implicit conversion any2stringadd fromMap[K, V] to any2stringadd[Map[K, V]]

### Inherited by implicit conversion StringFormat fromMap[K, V] to StringFormat[Map[K, V]]

### Inherited by implicit conversion Ensuring fromMap[K, V] to Ensuring[Map[K, V]]

### Inherited by implicit conversion ArrowAssoc fromMap[K, V] to ArrowAssoc[Map[K, V]]

### Ungrouped