scala.collection.mutable

ConcurrentMap

trait ConcurrentMap[A, B] extends Map[A, B]

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.

A

the key type of the map

B

the value type of the map

Source
ConcurrentMap.scala
Since

2.8

See also

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

Linear Supertypes
Map[A, B], MapLike[A, B, Map[A, B]], Cloneable[Map[A, B]], Shrinkable[A], Builder[(A, B), Map[A, B]], Growable[(A, B)], Map[A, B], MapLike[A, B, Map[A, B]], Subtractable[A, Map[A, B]], PartialFunction[A, B], (A) ⇒ B, GenMap[A, B], GenMapLike[A, B, Map[A, B]], Iterable[(A, B)], Iterable[(A, B)], IterableLike[(A, B), Map[A, B]], Equals, GenIterable[(A, B)], GenIterableLike[(A, B), Map[A, B]], Traversable[(A, B)], Mutable, Traversable[(A, B)], GenTraversable[(A, B)], GenericTraversableTemplate[(A, B), Iterable], TraversableLike[(A, B), Map[A, B]], GenTraversableLike[(A, B), Map[A, B]], Parallelizable[(A, B), ParMap[A, B]], TraversableOnce[(A, B)], GenTraversableOnce[(A, B)], FilterMonadic[(A, B), Map[A, B]], HasNewBuilder[(A, B), Map[A, B]], AnyRef, Any
Known Subclasses
Ordering
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Inherited
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  1. ConcurrentMap
  2. Map
  3. MapLike
  4. Cloneable
  5. Shrinkable
  6. Builder
  7. Growable
  8. Map
  9. MapLike
  10. Subtractable
  11. PartialFunction
  12. Function1
  13. GenMap
  14. GenMapLike
  15. Iterable
  16. Iterable
  17. IterableLike
  18. Equals
  19. GenIterable
  20. GenIterableLike
  21. Traversable
  22. Mutable
  23. Traversable
  24. GenTraversable
  25. GenericTraversableTemplate
  26. TraversableLike
  27. GenTraversableLike
  28. Parallelizable
  29. TraversableOnce
  30. GenTraversableOnce
  31. FilterMonadic
  32. HasNewBuilder
  33. AnyRef
  34. Any
Visibility
  1. Public
  2. All

Type Members

  1. class DefaultKeySet extends AbstractSet[A] with Set[A]

    The implementation class of the set returned by keySet.

  2. class DefaultValuesIterable extends AbstractIterable[B] with Iterable[B]

    The implementation class of the iterable returned by values.

  3. type Self = Map[A, B]

    The type implementing this traversable

    The type implementing this traversable

    Attributes
    protected
    Definition Classes
    TraversableLike
  4. class WithFilter extends FilterMonadic[A, Repr]

    A class supporting filtered operations.

Abstract Value Members

  1. abstract def +=(kv: (A, B)): ConcurrentMap.this.type

    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.

    kv

    the key/value pair.

    returns

    the map itself

    Definition Classes
    MapLikeBuilderGrowable
  2. abstract def -=(key: A): ConcurrentMap.this.type

    Removes a key from this map.

    Removes a key from this map.

    key

    the key to be removed

    returns

    the map itself.

    Definition Classes
    MapLikeShrinkable
  3. abstract def get(key: A): Option[B]

    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
    MapLikeGenMapLike
  4. abstract def iterator: Iterator[(A, B)]

    Creates a new iterator over all key/value pairs of this map

    Creates a new iterator over all key/value pairs of this map

    returns

    the new iterator

    Definition Classes
    MapLikeIterableLikeGenIterableLike
  5. abstract def putIfAbsent(k: A, v: B): Option[B]

    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

  6. abstract def remove(k: A, v: B): Boolean

    Removes the entry for the specified key if its currently mapped to the specified value.

    Removes the entry for the specified key if its 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

  7. abstract def replace(k: A, v: B): Option[B]

    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

  8. abstract def replace(k: A, oldvalue: B, newvalue: B): 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

Concrete Value Members

  1. final def !=(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  2. final def !=(arg0: Any): Boolean

    Test two objects for inequality.

    Test two objects for inequality.

    returns

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

    Definition Classes
    Any
  3. 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
  4. def +[B1 >: B](elem1: (A, B1), elem2: (A, B1), elems: (A, B1)*): Map[A, B1]

    Creates a new map containing two or more key/value mappings and all the key/value mappings of this map.

    Creates a new map containing two or more key/value mappings and all the key/value mappings of this map.

    Specified mappings will override existing mappings from this map with the same keys.

    B1

    the type of the added values

    elem1

    the first element to add.

    elem2

    the second element to add.

    elems

    the remaining elements to add.

    returns

    a new map containing mappings of this map and two or more specified mappings.

    Definition Classes
    MapLikeMapLike
    Annotations
    @migration
    Migration

    (Changed in version 2.8.0) + creates a new map. Use += to add an element to this map and return that map itself.

  5. def +[B1 >: B](kv: (A, B1)): Map[A, B1]

    Creates a new map containing a new key/value mapping and all the key/value mappings of this map.

    Creates a new map containing a new key/value mapping and all the key/value mappings of this map.

    Mapping kv will override existing mappings from this map with the same key.

    B1

    the type of the value in the key/value pair.

    kv

    the key/value mapping to be added

    returns

    a new map containing mappings of this map and the mapping kv.

    Definition Classes
    MapLikeMapLikeGenMapLike
    Annotations
    @migration
    Migration

    (Changed in version 2.8.0) + creates a new map. Use += to add an element to this map and return that map itself.

  6. def ++[B1 >: B](xs: GenTraversableOnce[(A, B1)]): Map[A, B1]

    Creates a new map containing the key/value mappings provided by the specified traversable object and all the key/value mappings of this map.

    Creates a new map containing the key/value mappings provided by the specified traversable object and all the key/value mappings of this map.

    Note that existing mappings from this map with the same key as those in xs will be overriden.

    B1

    the type of the added values

    xs

    the traversable object.

    returns

    a new map containing mappings of this map and those provided by xs.

    Definition Classes
    MapLikeMapLike
    Annotations
    @migration
    Migration

    (Changed in version 2.8.0) ++ creates a new map. Use ++= to add an element to this map and return that map itself.

  7. def ++[B](that: GenTraversableOnce[B]): ConcurrentMap[B]

    [use case]

    [use case]
    B

    the element type of the returned collection.

    that

    the traversable to append.

    returns

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

    Definition Classes
    TraversableLikeGenTraversableLike
  8. def ++:[B >: (A, B), That](that: Traversable[B])(implicit bf: CanBuildFrom[Map[A, B], B, That]): That

    As with ++, returns a new collection containing the elements from the left operand followed by the elements from the right operand.

    As with ++, returns a new collection containing the elements from the left operand followed by the elements from the right operand.

    It differs from ++ in that the right operand determines the type of the resulting collection rather than the left one. Mnemonic: the COLon is on the side of the new COLlection type.

    Example:

        scala> val x = List(1)
        x: List[Int] = List(1)
    
        scala> val y = LinkedList(2)
        y: scala.collection.mutable.LinkedList[Int] = LinkedList(2)
    
        scala> val z = x ++: y
        z: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2)
    

    This overload exists because: for the implementation of ++: we should reuse that of ++ because many collections override it with more efficient versions.

    Since TraversableOnce has no ++ method, we have to implement that directly, but Traversable and down can use the overload.

    B

    the element type of the returned collection.

    That

    the class of the returned collection. Where possible, That is the same class as the current collection class Repr, but this depends on the element type B being admissible for that class, which means that an implicit instance of type CanBuildFrom[Repr, B, That] is found.

    that

    the traversable to append.

    bf

    an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and and the new element type B.

    returns

    a new collection of type That which contains all elements of this concurrent map followed by all elements of that.

    Definition Classes
    TraversableLike
  9. def ++:[B](that: TraversableOnce[B]): ConcurrentMap[B]

    [use case]

    [use case]
    B

    the element type of the returned collection.

    that

    the traversable to append.

    returns

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

    Definition Classes
    TraversableLike
  10. def ++=(xs: TraversableOnce[(A, B)]): ConcurrentMap.this.type

    adds all elements produced by a TraversableOnce to this concurrent map.

    adds all elements produced by a TraversableOnce to this concurrent map.

    returns

    the concurrent map itself.

    Definition Classes
    Growable
  11. def +=(elem1: (A, B), elem2: (A, B), elems: (A, B)*): ConcurrentMap.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
  12. def -(elem1: A, elem2: A, elems: A*): Map[A, B]

    Creates a new map with all the key/value mappings of this map except mappings with keys equal to any of the two or more specified keys.

    Creates a new map with all the key/value mappings of this map except mappings with keys equal to any of the two or more specified keys.

    elem1

    the first element to remove.

    elem2

    the second element to remove.

    elems

    the remaining elements to remove.

    returns

    a new map containing all the mappings of this map except mappings with a key equal to elem1, elem2 or any of elems.

    Definition Classes
    MapLikeSubtractable
    Annotations
    @migration
    Migration

    (Changed in version 2.8.0) - creates a new map. Use -= to remove an element from this map and return that map itself.

  13. def -(key: A): Map[A, B]

    Creates a new map with all the key/value mappings of this map except the key/value mapping with the specified key.

    Creates a new map with all the key/value mappings of this map except the key/value mapping with the specified key.

    key

    the key to be removed

    returns

    a new map with all the mappings of this map except that with a key key.

    Definition Classes
    MapLikeMapLikeSubtractableGenMapLike
    Annotations
    @migration
    Migration

    (Changed in version 2.8.0) - creates a new map. Use -= to remove an element from this map and return that map itself.

  14. def --(xs: GenTraversableOnce[A]): Map[A, B]

    Creates a new map with all the key/value mappings of this map except mappings with keys equal to any of those provided by the specified traversable object.

    Creates a new map with all the key/value mappings of this map except mappings with keys equal to any of those provided by the specified traversable object.

    xs

    the traversable object.

    returns

    a new map with all the key/value mappings of this map except mappings with a key equal to a key from xs.

    Definition Classes
    MapLikeSubtractable
    Annotations
    @migration
    Migration

    (Changed in version 2.8.0) -- creates a new map. Use --= to remove an element from this map and return that map itself.

  15. def --=(xs: TraversableOnce[A]): ConcurrentMap.this.type

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

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

    returns

    the concurrent map itself

    Definition Classes
    Shrinkable
  16. def -=(elem1: A, elem2: A, elems: A*): ConcurrentMap.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
  17. def /:[B](z: B)(op: (B, (A, B)) ⇒ 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: /: is alternate syntax for foldLeft; z /: xs is the same as xs foldLeft z.

    Examples:

    Note that the folding function used to compute b is equivalent to that used to compute c.

         scala> val a = LinkedList(1,2,3,4)
         a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)
    
         scala> val b = (5 /: a)(_+_)
         b: Int = 15
    
         scala> val c = (5 /: a)((x,y) => x + y)
         c: Int = 15
    

    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(op(z, x1), x2), ..., xn)
    

    where x1, ..., xn are the elements of this concurrent map.

    Definition Classes
    TraversableOnceGenTraversableOnce
  18. def /:\[A1 >: (A, B)](z: A1)(op: (A1, A1) ⇒ A1): A1

    A syntactic sugar for out of order folding.

    A syntactic sugar for out of order folding. See fold.

    Example:

         scala> val a = LinkedList(1,2,3,4)
         a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)
    
         scala> val b = (a /:\ 5)(_+_)
         b: Int = 15
    
    Definition Classes
    GenTraversableOnce
  19. def :\[B](z: B)(op: ((A, B), 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: :\ is alternate syntax for foldRight; xs :\ z is the same as xs foldRight z.

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

    Examples:

    Note that the folding function used to compute b is equivalent to that used to compute c.

         scala> val a = LinkedList(1,2,3,4)
         a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)
    
         scala> val b = (a :\ 5)(_+_)
         b: Int = 15
    
         scala> val c = (a :\ 5)((x,y) => x + y)
         c: Int = 15
    
    
    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.

    Definition Classes
    TraversableOnceGenTraversableOnce
  20. final def ==(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  21. final def ==(arg0: Any): Boolean

    Test two objects for equality.

    Test two objects for equality. 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
    Any
  22. def addString(b: StringBuilder, start: String, sep: String, end: String): StringBuilder

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

    Appends all bindings of this 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 of all bindings of this map in the form of key -> value are separated by the string sep.

    b

    the builder to which strings are appended.

    start

    the starting string.

    sep

    the separator string.

    end

    the ending string.

    returns

    the string builder b to which elements were appended.

    Definition Classes
    MapLikeTraversableOnce
  23. def addString(b: StringBuilder): StringBuilder

    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 = LinkedList(1,2,3,4)
         a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)
    
         scala> val b = new StringBuilder()
         b: StringBuilder =
    
         scala> val h = a.addString(b)
         b: StringBuilder = 1234
    
    b

    the string builder to which elements are appended.

    returns

    the string builder b to which elements were appended.

    Definition Classes
    TraversableOnce
  24. def addString(b: StringBuilder, sep: String): StringBuilder

    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 = LinkedList(1,2,3,4)
         a: scala.collection.mutable.LinkedList[Int] = LinkedList(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
    TraversableOnce
  25. def aggregate[B](z: B)(seqop: (B, (A, B)) ⇒ B, combop: (B, B) ⇒ B): B

    Aggregates the results of applying an operator to subsequent elements.

    Aggregates the results of applying an operator to subsequent elements.

    This is a more general form of fold and reduce. It has similar semantics, but does not require the result to be a supertype of the element type. It traverses the elements in different partitions sequentially, using seqop to update the result, and then applies combop to results from different partitions. The implementation of this operation may operate on an arbitrary number of collection partitions, so combop may be invoked an arbitrary number of times.

    For example, one might want to process some elements and then produce a Set. In this case, seqop would process an element and append it to the list, while combop would concatenate two lists from different partitions together. The initial value z would be an empty set.

       pc.aggregate(Set[Int]())(_ += process(_), _ ++ _)
    

    Another example is calculating geometric mean from a collection of doubles (one would typically require big doubles for this).

    B

    the type of accumulated results

    z

    the initial value for the accumulated result of the partition - this will typically be the neutral element for the seqop operator (e.g. Nil for list concatenation or 0 for summation)

    seqop

    an operator used to accumulate results within a partition

    combop

    an associative operator used to combine results from different partitions

    Definition Classes
    TraversableOnceGenTraversableOnce
  26. def andThen[C](k: (B) ⇒ C): PartialFunction[A, 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.

    C

    the result type of the transformation function.

    k

    the transformation function

    returns

    a partial function with the same domain as this partial function, which maps arguments x to k(this(x)).

    Definition Classes
    PartialFunctionFunction1
  27. def apply(key: A): B

    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
    MapLikeGenMapLikeFunction1
  28. 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.

  29. def canEqual(that: Any): Boolean

    Method called from equality methods, so that user-defined subclasses can refuse to be equal to other collections of the same kind.

    Method called from equality methods, so that user-defined subclasses can refuse to be equal to other collections of the same kind.

    that

    The object with which this concurrent map should be compared

    returns

    true, if this concurrent map can possibly equal that, false otherwise. The test takes into consideration only the run-time types of objects but ignores their elements.

    Definition Classes
    IterableLikeEquals
  30. def clear(): Unit

    Removes all bindings from the map.

    Removes all bindings from the map. After this operation has completed, the map will be empty.

    Definition Classes
    MapLikeBuilderGrowable
  31. def clone(): Map[A, B]

    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
    MapLikeCloneable → AnyRef
    Note

    not specified by SLS as a member of AnyRef

  32. def collect[B](pf: PartialFunction[(A, B), B]): ConcurrentMap[B]

    [use case]

    [use case]
    B

    the element type of the returned collection.

    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
    TraversableLikeGenTraversableLike
  33. def collectFirst[B](pf: PartialFunction[(A, B), 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: 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
    TraversableOnce
    Example:
    1. Seq("a", 1, 5L).collectFirst({ case x: Int => x*10 }) = Some(10)

  34. def companion: GenericCompanion[Iterable]

    The factory companion object that builds instances of class ConcurrentMap.

    The factory companion object that builds instances of class ConcurrentMap. (or its Iterable superclass where class ConcurrentMap is not a Seq.)

    Definition Classes
    IterableIterableGenIterableTraversableTraversableGenTraversableGenericTraversableTemplate
  35. def compose[A](g: (A) ⇒ A): (A) ⇒ B

    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
  36. def contains(key: A): 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
    MapLikeGenMapLike
  37. def copyToArray(xs: Array[(A, B)], start: Int, len: Int): Unit

    [use case]

    [use case]
    xs

    the array to fill.

    start

    the starting index.

    len

    the maximal number of elements to copy.

    Definition Classes
    IterableLikeTraversableLikeTraversableOnceGenTraversableOnce
  38. def copyToArray(xs: Array[(A, B)]): Unit

    [use case]

    [use case]
    xs

    the array to fill.

    Definition Classes
    TraversableOnceGenTraversableOnce
  39. def copyToArray(xs: Array[(A, B)], start: Int): Unit

    [use case]

    [use case]
    xs

    the array to fill.

    start

    the starting index.

    Definition Classes
    TraversableOnceGenTraversableOnce
  40. def copyToBuffer[B >: (A, B)](dest: Buffer[B]): Unit

    Copies all elements of this concurrent map to a buffer.

    Copies all elements of this concurrent map to a buffer.

    dest

    The buffer to which elements are copied.

    Definition Classes
    TraversableOnce
  41. def count(p: ((A, B)) ⇒ 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.

    p

    the predicate used to test elements.

    returns

    the number of elements satisfying the predicate p.

    Definition Classes
    TraversableOnceGenTraversableOnce
  42. def default(key: A): B

    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
    MapLikeGenMapLike
    Exceptions thrown
    `NoSuchElementException`

  43. def drop(n: Int): Map[A, B]

    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.

    Definition Classes
    IterableLikeTraversableLikeGenTraversableLike
  44. def dropRight(n: Int): Map[A, B]

    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 take

    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.

    Definition Classes
    IterableLike
  45. def dropWhile(p: ((A, B)) ⇒ Boolean): Map[A, B]

    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
    TraversableLikeGenTraversableLike
  46. def empty: Map[A, B]

    The empty map of the same type as this map

    The empty map of the same type as this map

    returns

    an empty map of type This.

    Definition Classes
    MapMapMapLike
  47. final def eq(arg0: AnyRef): Boolean

    Tests whether the argument (arg0) is a reference to the receiver object (this).

    Tests whether the argument (arg0) 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
  48. def equals(that: Any): Boolean

    Compares two maps structurally; i.

    Compares two maps structurally; i.e. checks if all mappings contained in this map are also contained in the other map, and vice versa.

    that

    the other map

    returns

    true if both maps contain exactly the same mappings, false otherwise.

    Definition Classes
    GenMapLikeEquals → AnyRef → Any
  49. def exists(p: ((A, B)) ⇒ Boolean): Boolean

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

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

    p

    the predicate used to test elements.

    returns

    true if the given predicate p holds for some of the elements of this concurrent map, otherwise false.

    Definition Classes
    IterableLikeTraversableLikeTraversableOnceGenTraversableOnce
  50. def filter(p: ((A, B)) ⇒ Boolean): Map[A, B]

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

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

    p

    the predicate used to test elements.

    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
    TraversableLikeGenTraversableLike
  51. def filterKeys(p: (A) ⇒ Boolean): Map[A, B]

    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
    MapLikeGenMapLike
  52. def filterNot(p: ((A, B)) ⇒ Boolean): Map[A, B]

    Returns a new map with all key/value pairs for which the predicate p returns true.

    Returns a new map with all key/value pairs for which the predicate p returns true.

    Note: This method works by successively removing elements fro which the predicate is false from this set. If removal is slow, or you expect that most elements of the set will be removed, you might consider using filter with a negated predicate instead.

    p

    A predicate over key-value pairs

    returns

    A new map containing elements not satisfying the predicate.

    Definition Classes
    MapLikeTraversableLikeGenTraversableLike
  53. 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()
    Note

    not specified by SLS as a member of AnyRef

  54. def find(p: ((A, B)) ⇒ Boolean): Option[(A, B)]

    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: 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
    IterableLikeTraversableLikeTraversableOnceGenTraversableOnce
  55. def flatMap[B](f: ((A, B)) ⇒ GenTraversableOnce[B]): ConcurrentMap[B]

    [use case]

    [use case]
    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
    TraversableLikeGenTraversableLikeFilterMonadic
  56. def fold[A1 >: (A, B)](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 order in which operations are performed on elements is unspecified and may be nondeterministic.

    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 fold operator op between all the elements and z

    Definition Classes
    TraversableOnceGenTraversableOnce
  57. def foldLeft[B](z: B)(op: (B, (A, B)) ⇒ 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: 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.

    Definition Classes
    TraversableOnceGenTraversableOnce
  58. def foldRight[B](z: B)(op: ((A, B), 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: 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.

    Definition Classes
    IterableLikeTraversableOnceGenTraversableOnce
  59. def forall(p: ((A, B)) ⇒ 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.

    p

    the predicate used to test elements.

    returns

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

    Definition Classes
    IterableLikeTraversableLikeTraversableOnceGenTraversableOnce
  60. def foreach(f: ((A, B)) ⇒ Unit): Unit

    [use case]

    [use case]
    f

    the function that is applied for its side-effect to every element. The result of function f is discarded.

    Definition Classes
    IterableLikeTraversableLikeGenTraversableLikeTraversableOnceGenTraversableOnceFilterMonadic
  61. def genericBuilder[B]: Builder[B, Iterable[B]]

    The generic builder that builds instances of ConcurrentMap at arbitrary element types.

    The generic builder that builds instances of ConcurrentMap at arbitrary element types.

    Definition Classes
    GenericTraversableTemplate
  62. final def getClass(): Class[_]

    A representation that corresponds to the dynamic class of the receiver object.

    A representation that corresponds to the dynamic class of the receiver object.

    The nature of the representation is platform dependent.

    returns

    a representation that corresponds to the dynamic class of the receiver object.

    Definition Classes
    AnyRef → Any
    Note

    not specified by SLS as a member of AnyRef

  63. def getOrElse(key: A, default: ⇒ B): B

    [use case]

    [use case]
    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
    MapLikeGenMapLike
  64. def getOrElseUpdate(key: A, op: ⇒ B): B

    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.

    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
    MapLike
  65. def groupBy[K](f: ((A, B)) ⇒ K): Map[K, Map[A, B]]

    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: this method is not re-implemented by views. This means when applied to a view it will always force the view and return a new concurrent map.

    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 partition 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
    TraversableLikeGenTraversableLike
  66. def grouped(size: Int): Iterator[Map[A, B]]

    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 truncated if the elements don't divide evenly.

    Definition Classes
    IterableLike
    See also

    Iterator#grouped

  67. 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.

    Note: many collection methods will not work on collections of infinite sizes.

    returns

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

    Definition Classes
    TraversableLikeTraversableOnceGenTraversableOnce
  68. def hashCode(): Int

    The hashCode method for reference types.

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

    returns

    the hash code value for this object.

    Definition Classes
    GenMapLike → AnyRef → Any
  69. def head: (A, B)

    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
    IterableLikeGenIterableLikeTraversableLikeGenTraversableLike
    Exceptions thrown
    `NoSuchElementException`

    if the concurrent map is empty.

  70. def headOption: Option[(A, B)]

    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
    TraversableLike
  71. def init: Map[A, B]

    Selects all elements except the last.

    Selects all elements except the last.

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

    returns

    a concurrent map consisting of all elements of this concurrent map except the last one.

    Definition Classes
    TraversableLike
    Exceptions thrown
    `UnsupportedOperationException`

    if the concurrent map is empty.

  72. def inits: Iterator[Map[A, B]]

    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.

    returns

    an iterator over all the inits of this concurrent map

    Definition Classes
    TraversableLike
    Example:
    1. List(1,2,3).inits = Iterator(List(1,2,3), List(1,2), List(1), Nil)

  73. def isDefinedAt(key: A): 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
    MapLikeGenMapLikePartialFunction
  74. def isEmpty: Boolean

    Tests whether the map is empty.

    Tests whether the map is empty.

    returns

    true if the map does not contain any key/value binding, false otherwise.

    Definition Classes
    MapLikeIterableLikeGenIterableLikeTraversableLikeTraversableOnceGenTraversableOnce
  75. final def isInstanceOf[T0]: Boolean

    Test whether the dynamic type of the receiver object is T0.

    Test whether the dynamic type of the receiver object is T0.

    Note that the result of the test is modulo Scala's erasure semantics. Therefore the expression 1.isInstanceOf[String] will return false, while the expression List(1).isInstanceOf[List[String]] will return true. 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 specified type.

    returns

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

    Definition Classes
    Any
  76. final def isTraversableAgain: Boolean

    Tests whether this concurrent map can be repeatedly traversed.

    Tests whether this concurrent map can be repeatedly traversed.

    returns

    true

    Definition Classes
    GenTraversableLikeGenTraversableOnce
  77. def keySet: Set[A]

    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
    MapLikeGenMapLike
  78. def keys: Iterable[A]

    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
    MapLikeGenMapLike
    Annotations
    @migration
    Migration

    (Changed in version 2.8.0) keys returns Iterable[A] rather than Iterator[A].

  79. def keysIterator: Iterator[A]

    Creates an iterator for all keys.

    Creates an iterator for all keys.

    returns

    an iterator over all keys.

    Definition Classes
    MapLikeGenMapLike
  80. def last: (A, B)

    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
    TraversableLike
    Exceptions thrown
    NoSuchElementException

    If the concurrent map is empty.

  81. def lastOption: Option[(A, B)]

    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
    TraversableLike
  82. def lift: (A) ⇒ Option[B]

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

    Turns this partial function into an 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

  83. def map[B](f: ((A, B)) ⇒ B): ConcurrentMap[B]

    [use case]

    [use case]
    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 function f to each element of this concurrent map and collecting the results.

    Definition Classes
    TraversableLikeGenTraversableLikeFilterMonadic
  84. def mapResult[NewTo](f: (Map[A, B]) ⇒ NewTo): Builder[(A, B), NewTo]

    Creates a new builder by applying a transformation function to the results of this builder.

    Creates a new builder by applying a transformation function to the results of this builder.

    NewTo

    the type of collection returned by f.

    f

    the transformation function.

    returns

    a new builder which is the same as the current builder except that a transformation function is applied to this builder's result.

    Definition Classes
    Builder
  85. def mapValues[C](f: (B) ⇒ C): Map[A, C]

    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
    MapLikeGenMapLike
  86. def max: A

    [use case]

    [use case]
    returns

    the largest element of this concurrent map.

    Definition Classes
    TraversableOnceGenTraversableOnce
  87. def maxBy[B](f: ((A, B)) ⇒ B)(implicit cmp: Ordering[B]): (A, B)

    Definition Classes
    TraversableOnceGenTraversableOnce
  88. def min: A

    [use case]

    [use case]
    returns

    the smallest element of this concurrent map

    Definition Classes
    TraversableOnceGenTraversableOnce
  89. def minBy[B](f: ((A, B)) ⇒ B)(implicit cmp: Ordering[B]): (A, B)

    Definition Classes
    TraversableOnceGenTraversableOnce
  90. def missingCase(x: A): B

    Attributes
    protected
    Definition Classes
    PartialFunction
  91. def mkString: String

    Displays all elements of this concurrent map in a string.

    Displays all elements of this concurrent map in a 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 follow each other without any separator string.

    Definition Classes
    TraversableOnceGenTraversableOnce
  92. 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.

    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
    TraversableOnceGenTraversableOnce
    Example:
    1. List(1, 2, 3).mkString("|") = "1|2|3"

  93. 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.

    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
    TraversableOnceGenTraversableOnce
    Example:
    1. List(1, 2, 3).mkString("(", "; ", ")") = "(1; 2; 3)"

  94. 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
  95. def newBuilder: Builder[(A, B), Map[A, B]]

    A common implementation of newBuilder for all mutable maps in terms of empty.

    A common implementation of newBuilder for all mutable maps in terms of empty.

    Overrides MapLike implementation for better efficiency.

    Attributes
    protected[this]
    Definition Classes
    MapLikeMapLikeTraversableLikeHasNewBuilder
  96. 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
    TraversableOnceGenTraversableOnce
  97. 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
    Note

    not specified by SLS as a member of AnyRef

  98. 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
    Note

    not specified by SLS as a member of AnyRef

  99. def orElse[A1 <: A, B1 >: B](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
  100. def orElseFast[A1 <: A, B1 >: B](that: PartialFunction[A1, B1]): PartialFunction[A1, B1]

    Definition Classes
    PartialFunction
  101. def par: ParMap[A, B]

    Returns a parallel implementation of this collection.

    Returns a parallel implementation of this collection.

    For most collection types, this method creates a new parallel collection by copying all the elements. For these collection, par takes linear time. Mutable collections in this category do not produce a mutable parallel collection that has the same underlying dataset, so changes in one collection will not be reflected in the other one.

    Specific collections (e.g. ParArray or mutable.ParHashMap) override this default behaviour by creating a parallel collection which shares the same underlying dataset. For these collections, par takes constant or sublinear time.

    All parallel collections return a reference to themselves.

    returns

    a parallel implementation of this collection

    Definition Classes
    Parallelizable
  102. def parCombiner: Combiner[(A, B), ParMap[A, B]]

    The default par implementation uses the combiner provided by this method to create a new parallel collection.

    The default par implementation uses the combiner provided by this method to create a new parallel collection.

    returns

    a combiner for the parallel collection of type ParRepr

    Attributes
    protected[this]
    Definition Classes
    MapLikeMapLikeTraversableLikeParallelizable
  103. def partition(p: ((A, B)) ⇒ Boolean): (Map[A, B], Map[A, B])

    Partitions this concurrent map in two concurrent maps according to a predicate.

    Partitions this concurrent map in two concurrent maps according to a predicate.

    p

    the predicate on which to partition.

    returns

    a pair of concurrent maps: the first concurrent map consists of all elements that satisfy the predicate p and the second concurrent map consists of all elements that don't. The relative order of the elements in the resulting concurrent maps is the same as in the original concurrent map.

    Definition Classes
    TraversableLikeGenTraversableLike
  104. def product: A

    [use case]

    [use case]
    returns

    the product of all elements in this concurrent map of numbers of type Int. Instead of Int, any other type T with an implicit Numeric[T] implementation can be used as element type of the concurrent map and as result type of product. Examples of such types are: Long, Float, Double, BigInt.

    Definition Classes
    TraversableOnceGenTraversableOnce
  105. def put(key: A, value: B): Option[B]

    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
    MapLike
  106. def reduce[A1 >: (A, B)](op: (A1, A1) ⇒ A1): A1

    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.

    A1

    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
    TraversableOnceGenTraversableOnce
    Exceptions thrown
    UnsupportedOperationException

    if this concurrent map is empty.

  107. def reduceLeft[B >: (A, B)](op: (B, (A, B)) ⇒ B): B

    Definition Classes
    TraversableOnce
  108. def reduceLeftOption[B >: (A, B)](op: (B, (A, B)) ⇒ 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: 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) is this concurrent map is nonempty, None otherwise.

    Definition Classes
    TraversableOnceGenTraversableOnce
  109. def reduceOption[A1 >: (A, B)](op: (A1, A1) ⇒ A1): Option[A1]

    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.

    A1

    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
    TraversableOnceGenTraversableOnce
  110. def reduceRight[B >: (A, B)](op: ((A, B), 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: 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(x,,1,,, op(x,,2,,, ..., op(x,,n-1,,, x,,n,,)...))
    

    where x1, ..., xn are the elements of this concurrent map.

    Definition Classes
    IterableLikeTraversableOnceGenTraversableOnce
    Exceptions thrown
    `UnsupportedOperationException`

    if this concurrent map is empty.

  111. def reduceRightOption[B >: (A, B)](op: ((A, B), 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: 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) is this concurrent map is nonempty, None otherwise.

    Definition Classes
    TraversableOnceGenTraversableOnce
  112. def remove(key: A): Option[B]

    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
    MapLike
  113. def repr: Map[A, B]

    The collection of type concurrent map underlying this TraversableLike object.

    The collection of type concurrent map underlying this TraversableLike object. By default this is implemented as the TraversableLike object itself, but this can be overridden.

    Definition Classes
    TraversableLikeGenTraversableLike
  114. def result(): Map[A, B]

    The result when this map is used as a builder

    The result when this map is used as a builder

    returns

    the map representation itself.

    Definition Classes
    MapLikeBuilder
  115. def retain(p: (A, B) ⇒ Boolean): ConcurrentMap.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
    MapLike
  116. def reversed: List[(A, B)]

    Attributes
    protected[this]
    Definition Classes
    TraversableOnce
  117. def sameElements(that: GenIterable[(A, B)]): Boolean

    [use case]

    [use case]
    that

    the collection to compare with.

    returns

    true, if both collections contain the same elements in the same order, false otherwise.

    Definition Classes
    IterableLikeGenIterableLike
  118. def scan[B >: (A, B), That](z: B)(op: (B, B) ⇒ B)(implicit cbf: CanBuildFrom[Map[A, B], B, That]): That

    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

    That

    type of the resulting collection

    z

    neutral element for the operator op

    op

    the associative operator for the scan

    cbf

    combiner factory which provides a combiner

    returns

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

    Definition Classes
    TraversableLikeGenTraversableLike
  119. def scanLeft[B, That](z: B)(op: (B, (A, B)) ⇒ B)(implicit bf: CanBuildFrom[Map[A, B], B, That]): That

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

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

    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

    That

    the actual type of the resulting collection

    z

    the initial value

    op

    the binary operator applied to the intermediate result and the element

    bf

    an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and and the new element type B.

    returns

    collection with intermediate results

    Definition Classes
    TraversableLikeGenTraversableLike
  120. def scanRight[B, That](z: B)(op: ((A, B), B) ⇒ B)(implicit bf: CanBuildFrom[Map[A, B], B, That]): That

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

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

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

    Example:

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

    the type of the elements in the resulting collection

    That

    the actual type of the resulting collection

    z

    the initial value

    op

    the binary operator applied to the intermediate result and the element

    bf

    an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and and the new element type B.

    returns

    collection with intermediate results

    Definition Classes
    TraversableLikeGenTraversableLike
    Annotations
    @migration
    Migration

    (Changed in version 2.9.0) The behavior of scanRight has changed. The previous behavior can be reproduced with scanRight.reverse.

  121. def seq: Map[A, B]

    A version of this collection with all of the operations implemented sequentially (i.

    A version of this collection with all of the operations implemented sequentially (i.e. in a single-threaded manner).

    This method returns a reference to this collection. In parallel collections, it is redefined to return a sequential implementation of this collection. In both cases, it has O(1) complexity.

    returns

    a sequential view of the collection.

    Definition Classes
    MapMapGenMapGenMapLikeIterableIterableGenIterableTraversableTraversableGenTraversableParallelizableTraversableOnceGenTraversableOnce
  122. def size: Int

    The size of this concurrent map.

    The size of this concurrent map.

    returns

    the number of elements in this concurrent map.

    Definition Classes
    TraversableOnceGenTraversableOnce
  123. def sizeHint(coll: scala.collection.TraversableLike[_, _], 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 is known to have a cheap size method. Currently this is assumed to be the case if and only if the collection is of type IndexedSeqLike. 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
  124. 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
  125. def sizeHintBounded(size: Int, boundingColl: scala.collection.TraversableLike[_, _]): 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
  126. def slice(from: Int, until: Int): Map[A, B]

    Selects an interval of elements.

    Selects an interval of elements. The returned collection 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 highest 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
    IterableLikeTraversableLikeGenTraversableLike
  127. def sliding(size: Int, step: Int): Iterator[Map[A, B]]

    Definition Classes
    IterableLike
  128. def sliding(size: Int): Iterator[Map[A, B]]

    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.)

    size

    the number of elements per group

    returns

    An iterator producing concurrent maps of size size, except the last and the only element will be truncated if there are fewer elements than size.

    Definition Classes
    IterableLike
    See also

    Iterator#sliding

  129. def span(p: ((A, B)) ⇒ Boolean): (Map[A, B], Map[A, B])

    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
    TraversableLikeGenTraversableLike
  130. def splitAt(n: Int): (Map[A, B], Map[A, B])

    Splits this concurrent map into two at a given position.

    Splits this concurrent map into two 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
    TraversableLikeGenTraversableLike
  131. def stringPrefix: String

    Defines the prefix of this object's toString representation.

    Defines the prefix of this object's toString representation.

    returns

    a string representation which starts the result of toString applied to this concurrent map. Unless overridden in subclasses, the string prefix of every map is "Map".

    Definition Classes
    MapLikeTraversableLikeGenTraversableLike
  132. def sum: A

    [use case]

    [use case]
    returns

    the sum of all elements in this concurrent map of numbers of type Int. Instead of Int, any other type T with an implicit Numeric[T] implementation can be used as element type of the concurrent map and as result type of sum. Examples of such types are: Long, Float, Double, BigInt.

    Definition Classes
    TraversableOnceGenTraversableOnce
  133. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef
  134. def tail: Map[A, B]

    Selects all elements except the first.

    Selects all elements except the first.

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

    returns

    a concurrent map consisting of all elements of this concurrent map except the first one.

    Definition Classes
    TraversableLikeGenTraversableLike
    Exceptions thrown
    `UnsupportedOperationException`

    if the concurrent map is empty.

  135. def tails: Iterator[Map[A, B]]

    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
    TraversableLike
    Example:
    1. List(1,2,3).tails = Iterator(List(1,2,3), List(2,3), List(3), Nil)

  136. def take(n: Int): Map[A, B]

    Selects first n elements.

    Selects first n elements.

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

    n

    Tt 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.

    Definition Classes
    IterableLikeTraversableLikeGenTraversableLike
  137. def takeRight(n: Int): Map[A, B]

    Selects last n elements.

    Selects 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

    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.

    Definition Classes
    IterableLike
  138. def takeWhile(p: ((A, B)) ⇒ Boolean): Map[A, B]

    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
    IterableLikeTraversableLikeGenTraversableLike
  139. def thisCollection: Iterable[(A, B)]

    The underlying collection seen as an instance of ConcurrentMap.

    The underlying collection seen as an instance of ConcurrentMap. By default this is implemented as the current collection object itself, but this can be overridden.

    Attributes
    protected[this]
    Definition Classes
    IterableLikeTraversableLike
  140. def toArray: Array[A]

    [use case]

    [use case]
    returns

    an array containing all elements of this concurrent map. A ClassManifest must be available for the element type of this concurrent map.

    Definition Classes
    TraversableOnceGenTraversableOnce
  141. def toBuffer[C >: (A, B)]: Buffer[C]

    Converts this concurrent map to a mutable buffer.

    Converts this concurrent map to a mutable buffer.

    returns

    a buffer containing all elements of this concurrent map.

    Definition Classes
    MapLikeTraversableOnceGenTraversableOnce
  142. def toCollection(repr: Map[A, B]): Iterable[(A, B)]

    A conversion from collections of type Repr to ConcurrentMap objects.

    A conversion from collections of type Repr to ConcurrentMap objects. By default this is implemented as just a cast, but this can be overridden.

    Attributes
    protected[this]
    Definition Classes
    IterableLikeTraversableLike
  143. def toIndexedSeq: IndexedSeq[(A, B)]

    Converts this concurrent map to an indexed sequence.

    Converts this concurrent map to an indexed sequence.

    returns

    an indexed sequence containing all elements of this concurrent map.

    Definition Classes
    TraversableOnceGenTraversableOnce
  144. def toIterable: Iterable[(A, B)]

    Converts this concurrent map to an iterable collection.

    Converts this concurrent map to an iterable collection. Note that the choice of target Iterable is lazy in this default implementation as this TraversableOnce may be lazy and unevaluated (i.e. it may be an iterator which is only traversable once).

    returns

    an Iterable containing all elements of this concurrent map.

    Definition Classes
    IterableLikeTraversableOnceGenTraversableOnce
  145. def toIterator: Iterator[(A, B)]

    Returns an Iterator over the elements in this concurrent map.

    Returns an Iterator over the elements in this concurrent map. Will return the same Iterator if this instance is already an Iterator.

    returns

    an Iterator containing all elements of this concurrent map.

    Definition Classes
    IterableLikeTraversableLikeGenTraversableOnce
  146. def toList: List[(A, B)]

    Converts this concurrent map to a list.

    Converts this concurrent map to a list.

    returns

    a list containing all elements of this concurrent map.

    Definition Classes
    TraversableOnceGenTraversableOnce
  147. def toMap[T, U]: Map[T, U]

    [use case]

    [use case]
    returns

    a map of type immutable.Map[T, U] containing all key/value pairs of type (T, U) of this concurrent map.

    Definition Classes
    TraversableOnceGenTraversableOnce
  148. def toSeq: Seq[(A, B)]

    Overridden for efficiency.

    Overridden for efficiency.

    returns

    a sequence containing all elements of this concurrent map.

    Definition Classes
    MapLikeTraversableOnceGenTraversableOnce
  149. def toSet[B >: (A, B)]: Set[B]

    Converts this concurrent map to a set.

    Converts this concurrent map to a set.

    returns

    a set containing all elements of this concurrent map.

    Definition Classes
    TraversableOnceGenTraversableOnce
  150. def toStream: Stream[(A, B)]

    Converts this concurrent map to a stream.

    Converts this concurrent map to a stream.

    returns

    a stream containing all elements of this concurrent map.

    Definition Classes
    IterableLikeTraversableLikeGenTraversableOnce
  151. def toString(): String

    Converts this concurrent map to a string.

    Converts this concurrent map to a string.

    returns

    a string representation of this collection. By default this string consists of the stringPrefix of this concurrent map, followed by all elements separated by commas and enclosed in parentheses.

    Definition Classes
    MapLikeTraversableLikeFunction1 → AnyRef → Any
  152. def toTraversable: Traversable[(A, B)]

    Converts this concurrent map to an unspecified Traversable.

    Converts this concurrent map to an unspecified Traversable. Will return the same collection if this instance is already Traversable.

    returns

    a Traversable containing all elements of this concurrent map.

    Definition Classes
    TraversableLikeTraversableOnceGenTraversableOnce
  153. def transform(f: (A, B) ⇒ B): ConcurrentMap.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
    MapLike
  154. def unzip[A1, A2](implicit asPair: ((A, B)) ⇒ (A1, A2)): (Iterable[A1], 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.

    asPair

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

    returns

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

    Definition Classes
    GenericTraversableTemplate
  155. def unzip3[A1, A2, A3](implicit asTriple: ((A, B)) ⇒ (A1, A2, A3)): (Iterable[A1], Iterable[A2], 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.

    asTriple

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

    returns

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

    Definition Classes
    GenericTraversableTemplate
  156. def update(key: A, value: B): 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
    MapLike
  157. def updated[B1 >: B](key: A, value: B1): Map[A, B1]

    Creates a new map consisting of all key/value pairs of the current map plus a new pair of a given key and value.

    Creates a new map consisting of all key/value pairs of the current map plus a new pair of a given key and value.

    B1

    the type of the added value

    key

    The key to add

    value

    The new value

    returns

    A fresh immutable map with the binding from key to value added to this map.

    Definition Classes
    MapLikeMapLike
  158. def values: Iterable[B]

    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
    MapLikeGenMapLike
    Annotations
    @migration
    Migration

    (Changed in version 2.8.0) values returns Iterable[B] rather than Iterator[B].

  159. def valuesIterator: Iterator[B]

    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
    MapLikeGenMapLike
  160. def view(from: Int, until: Int): IterableView[(A, B), Map[A, B]]

    Creates a non-strict view of a slice of this concurrent map.

    Creates a non-strict view of a slice of this concurrent map.

    Note: the difference between view and slice is that view produces a view of the current concurrent map, whereas slice produces a new concurrent map.

    Note: view(from, to) is equivalent to view.slice(from, to)

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

    from

    the index of the first element of the view

    until

    the index of the element following the view

    returns

    a non-strict view of a slice of this concurrent map, starting at index from and extending up to (but not including) index until.

    Definition Classes
    IterableLikeTraversableLike
  161. def view: IterableView[(A, B), Map[A, B]]

    Creates a non-strict view of this concurrent map.

    Creates a non-strict view of this concurrent map.

    returns

    a non-strict view of this concurrent map.

    Definition Classes
    IterableLikeTraversableLike
  162. final def wait(): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws()
  163. final def wait(arg0: Long, arg1: Int): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws()
  164. final def wait(arg0: Long): Unit

    Definition Classes
    AnyRef
    Annotations
    @throws()
  165. def withDefault(d: (A) ⇒ B): Map[A, B]

    The same map with a given default function.

    The same map with a given default function.

    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
  166. def withDefaultValue(d: B): Map[A, B]

    The same map with a given default value.

    The same map with a given default value.

    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
  167. def withFilter(p: ((A, B)) ⇒ Boolean): FilterMonadic[(A, B), Map[A, B]]

    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
    TraversableLikeFilterMonadic
  168. def zip[B](that: GenIterable[B]): ConcurrentMap[(A, B)]

    [use case]

    [use case]
    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
    IterableLikeGenIterableLike
  169. def zipAll[B](that: Iterable[B], thisElem: (A, B), thatElem: B): ConcurrentMap[(A, B)]

    [use case]

    [use case]
    B

    the type of the second half of the returned pairs

    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 concurrent map 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
    IterableLikeGenIterableLike
  170. def zipWithIndex: ConcurrentMap[(A, Int)]

    [use case]

    [use case]
    returns

    A new concurrent map containing pairs consisting of all elements of this concurrent map paired with their index. Indices start at 0. @example List("a", "b", "c").zipWithIndex = List(("a", 0), ("b", 1), ("c", 2))

    Definition Classes
    IterableLikeGenIterableLike

Inherited from Map[A, B]

Inherited from MapLike[A, B, Map[A, B]]

Inherited from Cloneable[Map[A, B]]

Inherited from Shrinkable[A]

Inherited from Builder[(A, B), Map[A, B]]

Inherited from Growable[(A, B)]

Inherited from Map[A, B]

Inherited from MapLike[A, B, Map[A, B]]

Inherited from Subtractable[A, Map[A, B]]

Inherited from PartialFunction[A, B]

Inherited from (A) ⇒ B

Inherited from GenMap[A, B]

Inherited from GenMapLike[A, B, Map[A, B]]

Inherited from Iterable[(A, B)]

Inherited from Iterable[(A, B)]

Inherited from IterableLike[(A, B), Map[A, B]]

Inherited from Equals

Inherited from GenIterable[(A, B)]

Inherited from GenIterableLike[(A, B), Map[A, B]]

Inherited from Traversable[(A, B)]

Inherited from Mutable

Inherited from Traversable[(A, B)]

Inherited from GenTraversable[(A, B)]

Inherited from GenericTraversableTemplate[(A, B), Iterable]

Inherited from TraversableLike[(A, B), Map[A, B]]

Inherited from GenTraversableLike[(A, B), Map[A, B]]

Inherited from Parallelizable[(A, B), ParMap[A, B]]

Inherited from TraversableOnce[(A, B)]

Inherited from GenTraversableOnce[(A, B)]

Inherited from FilterMonadic[(A, B), Map[A, B]]

Inherited from HasNewBuilder[(A, B), Map[A, B]]

Inherited from AnyRef

Inherited from Any