scala.collection

# SortedMapLike

#### trait SortedMapLike [A, +B, +This <: SortedMapLike[A, B, This] with SortedMap[A, B]] extends Sorted[A, This] with MapLike[A, B, This]

A template for maps whose keys are sorted. To create a concrete sorted map, you need to implement the rangeImpl method, in addition to those of `MapLike`.

Self Type
  SortedMapLike[A, B, This]
Source
  SortedMapLike.scala
Version

  2.8

Since

  2.8

Linear Supertypes
MapLike[A, B, This], Subtractable[A, This], GenMapLike[A, B, This], IterableLike[(A, B), This], GenIterableLike[(A, B), This], TraversableLike[(A, B), This], GenTraversableLike[(A, B), This], Parallelizable[(A, B), ParMap[A, B]], TraversableOnce[(A, B)], GenTraversableOnce[(A, B)], FilterMonadic[(A, B), This], HasNewBuilder[(A, B), This], Equals, PartialFunction[A, B], (A) ⇒ B, Sorted[A, This], AnyRef, Any
Known Subclasses
SortedMap, SortedMap, TreeMap
Ordering

1. Alphabetic
2. By inheritance

Inherited

1. Hide All
2. Show all

1. SortedMapLike
2. MapLike
3. Subtractable
4. GenMapLike
5. IterableLike
6. GenIterableLike
7. TraversableLike
8. GenTraversableLike
9. Parallelizable
10. TraversableOnce
11. GenTraversableOnce
12. FilterMonadic
13. HasNewBuilder
14. Equals
15. PartialFunction
16. Function1
17. Sorted
18. AnyRef
19. Any

Visibility

1. Public
2. All

### Type Members

1. #### class DefaultKeySet extends Set[A]

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

2. #### class DefaultKeySortedSet extends DefaultKeySet with SortedSet[A]

   Attributes
     protected

3. #### class DefaultValuesIterable extends Iterable[B]

   The implementation class of the iterable returned by `values`.

4. #### type Self = This

   The type implementing this traversable

   The type implementing this traversable

   Attributes
     protected
   Definition Classes
     TraversableLike

5. #### class WithFilter extends FilterMonadic[A, Repr]

   A class supporting filtered operations.

### Abstract Value Members

1. #### def + [B1 >: B] (kv: (A, B1)): SortedMap[A, B1]

   Add a key/value pair to this map.

   Add a key/value pair to this map.

   B1

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

   kv

     the key/value pair

   returns

     A new map with the new binding added to this map

   Attributes
     abstract
   Definition Classes
     SortedMapLike → MapLike → GenMapLike

2. #### def - (key: A): This

   Removes a key from this map, returning a new map.

   Removes a key from this map, returning a new map.

   key

     the key to be removed

   returns

     a new map without a binding for `key`

   Attributes
     abstract
   Definition Classes
     MapLike → Subtractable → GenMapLike

3. #### def empty : This

   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`.

   Attributes
     abstract
   Definition Classes
     MapLike

4. #### 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.

   Attributes
     abstract
   Definition Classes
     MapLike → GenMapLike

5. #### 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

   Attributes
     abstract
   Definition Classes
     MapLike → IterableLike → GenIterableLike

6. #### implicit def ordering : Ordering[A]

   Attributes
     implicit abstract
   Definition Classes
     SortedMapLike → Sorted

7. #### def rangeImpl (from: Option[A], until: Option[A]): This

   Creates a ranged projection of this collection.

   Creates a ranged projection of this collection. Any mutations in the ranged projection will update this collection and vice versa. Note: keys are not garuanteed to be consistent between this collection and the projection. This is the case for buffers where indexing is relative to the projection.

   from

     The lower-bound (inclusive) of the ranged projection. `None` if there is no lower bound.

   until

     The upper-bound (exclusive) of the ranged projection. `None` if there is no upper bound.

   Attributes
     abstract
   Definition Classes
     SortedMapLike → Sorted

8. #### def seq : Map[A, B]

   Attributes
     abstract
   Definition Classes
     GenMapLike → Parallelizable → GenTraversableOnce

### Concrete Value Members

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

   Attributes
     final
   Definition Classes
     AnyRef

2. #### def != (arg0: Any): Boolean

   Test two objects for inequality.

   Test two objects for inequality.

   returns

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

   Attributes
     final
   Definition Classes
     Any

3. #### def ## (): Int

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

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

   returns

     a hash value consistent with ==

   Attributes
     final
   Definition Classes
     AnyRef → Any

4. #### def + [B1 >: B] (elem1: (A, B1), elem2: (A, B1), elems: (A, B1)*): SortedMap[A, B1]

   Adds two or more elements to this collection and returns either the collection itself (if it is mutable), or a new collection with the added elements.

   Adds two or more elements to this collection and returns either the collection itself (if it is mutable), or a new collection with the added elements.

   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 with the given bindings added to this map

   Definition Classes
     SortedMapLike → MapLike

5. #### def ++ [B1 >: B] (xs: TraversableOnce[(A, B1)]): Map[A, B1]

   Definition Classes
     MapLike
   Annotations
     @bridge()

6. #### def ++ (xs: Traversable[(A, B)]): Map[A, B]

   [use case] Adds all key/value pairs in a traversable collection to this map, returning a new map.

   [use case]

   Adds all key/value pairs in a traversable collection to this map, returning a new map.

   returns

     a new map with the given bindings added to this map

   Attributes
     abstract
   Definition Classes
     MapLike

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

   Adds all key/value pairs in a traversable collection to this map, returning a new map.

   Adds all key/value pairs in a traversable collection to this map, returning a new map.

   B1

     the type of the added values

   returns

     a new map with the given bindings added to this map

   Definition Classes
     MapLike

8. #### def ++ [B >: (A, B), That] (that: TraversableOnce[B])(implicit bf: CanBuildFrom[This, B, That]): That

   Definition Classes
     TraversableLike
   Annotations
     @bridge()

9. #### def ++ [B] (that: GenTraversableOnce[B]): Map[B]

   [use case] Concatenates this map with the elements of a traversable collection.

   [use case]

   Concatenates this map with the elements of a traversable collection.

   B

     the element type of the returned collection.

   that

     the traversable to append.

   returns

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

   Attributes
     abstract
   Definition Classes
     GenTraversableLike

10. #### def ++ [B >: (A, B), That] (that: GenTraversableOnce[B])(implicit bf: CanBuildFrom[This, B, That]): That

    Concatenates this map with the elements of a traversable collection.

    Concatenates this map with the elements of a traversable collection.

    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 map followed by all elements of `that`.

    Definition Classes
      TraversableLike → GenTraversableLike

11. #### def ++: [B >: (A, B), That] (that: Traversable[B])(implicit bf: CanBuildFrom[This, B, That]): That

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

    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.

    Definition Classes
      TraversableLike

12. #### def ++: [B] (that: TraversableOnce[B]): Map[B]

    [use case] Concatenates this map with the elements of a traversable collection.

    [use case]

    Concatenates this map with the elements of a traversable collection. It differs from ++ in that the right operand determines the type of the resulting collection rather than the left one.

    B

      the element type of the returned collection.

    that

      the traversable to append.

    returns

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

    Attributes
      abstract
    Definition Classes
      TraversableLike

13. #### def ++: [B >: (A, B), That] (that: TraversableOnce[B])(implicit bf: CanBuildFrom[This, B, That]): That

    Concatenates this map with the elements of a traversable collection.

    Concatenates this map with the elements of a traversable collection. It differs from ++ in that the right operand determines the type of the resulting collection rather than the left one.

    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 map followed by all elements of `that`.

    Definition Classes
      TraversableLike

14. #### def - (elem1: A, elem2: A, elems: A*): This

    Creates a new map from this map with some elements removed.

    Creates a new map from this map with some elements removed.

    This method takes two or more elements to be removed. Another overloaded variant of this method handles the case where a single element is removed.

    elem1

      the first element to remove.

    elem2

      the second element to remove.

    elems

      the remaining elements to remove.

    returns

      a new map that contains all elements of the current map except one less occurrence of each of the given elements.

    Definition Classes
      Subtractable

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

    [use case] Removes a key from this map, returning a new map.

    [use case]

    Removes a key from this map, returning a new map.

    key

      the key to be removed

    returns

      a new map without a binding for `key`

    Attributes
      abstract
    Definition Classes
      MapLike

16. #### def -- (xs: TraversableOnce[A]): This

    Definition Classes
      Subtractable
    Annotations
      @bridge()

17. #### def -- (xs: GenTraversableOnce[A]): This

    Creates a new map from this map by removing all elements of another collection.

    Creates a new map from this map by removing all elements of another collection.

    returns

      a new map that contains all elements of the current map except one less occurrence of each of the elements of `elems`.

    Definition Classes
      Subtractable

18. #### def /: [B] (z: B)(op: (B, (A, B)) ⇒ B): B

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

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

    Note: `/:` is alternate syntax for `foldLeft`; `z /: xs` is the same as `xs foldLeft z`.

    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 map, going left to right with the start value `z` on the left:

                      op(...op(op(z, x,,1,,), x,,2,,), ..., x,,n,,)

      where `x,,1,,, ..., x,,n,,` are the elements of this map.

    Definition Classes
      TraversableOnce → GenTraversableOnce

19. #### 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`.

    Definition Classes
      GenTraversableOnce

20. #### def :\ [B] (z: B)(op: ((A, B), B) ⇒ B): B

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

    Applies a binary operator to all elements of this 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.

    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 map, going right to left with the start value `z` on the right:

                      op(x,,1,,, op(x,,2,,, ... op(x,,n,,, z)...))

      where `x,,1,,, ..., x,,n,,` are the elements of this map.

    Definition Classes
      TraversableOnce → GenTraversableOnce

21. #### def == (arg0: AnyRef): Boolean

    Attributes
      final
    Definition Classes
      AnyRef

22. #### def == (arg0: Any): Boolean

    Test two objects for equality.

    Test two objects for equality.

    returns

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

    Attributes
      final
    Definition Classes
      Any

23. #### 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
      MapLike → TraversableOnce

24. #### def addString (b: StringBuilder): StringBuilder

    Appends all elements of this map to a string builder.

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

    b

      the string builder to which elements are appended.

    returns

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

    Definition Classes
      TraversableOnce

25. #### def addString (b: StringBuilder, sep: String): StringBuilder

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

    Appends all elements of this 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 map, separated by the string `sep`.

    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

26. #### 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 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).

    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
      TraversableOnce → GenTraversableOnce

27. #### 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
      PartialFunction → Function1

28. #### 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
      MapLike → GenMapLike → Function1

29. #### 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.

    Attributes
      final
    Definition Classes
      Any

30. #### 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 map should be compared

    returns

      `true`, if this 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
      IterableLike → Equals

31. #### def clone (): AnyRef

    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.

    Attributes
      protected[lang]
    Definition Classes
      AnyRef
    Annotations
      @throws()

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

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

    [use case]

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

    B

      the element type of the returned collection.

    pf

      the partial function which filters and maps the map.

    returns

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

    Attributes
      abstract
    Definition Classes
      GenTraversableLike

33. #### def collect [B, That] (pf: PartialFunction[(A, B), B])(implicit bf: CanBuildFrom[This, B, That]): That

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

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

    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.

    pf

      the partial function which filters and maps the map.

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

    Definition Classes
      TraversableLike → GenTraversableLike

34. #### def collectFirst [B] (pf: PartialFunction[(A, B), B]): Option[B]

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

    Finds the first element of the 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)`

35. #### def compare (k0: A, k1: A): Int

    Comparison function that orders keys.

    Comparison function that orders keys.

    Definition Classes
      Sorted

36. #### 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

37. #### 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
      MapLike

38. #### def copyToArray (xs: Array[(A, B)], start: Int, len: Int): Unit

    [use case] Copies elements of this map to an array.

    [use case]

    Copies elements of this map to an array. Fills the given array `xs` with at most `len` elements of this map, starting at position `start`. Copying will stop once either the end of the current map is reached, or the end of the array is reached, or `len` elements have been copied.

    xs

      the array to fill.

    start

      the starting index.

    len

      the maximal number of elements to copy.

    Attributes
      abstract
    Definition Classes
      TraversableLike

39. #### def copyToArray [B >: (A, B)] (xs: Array[B], start: Int, len: Int): Unit

    Copies elements of this map to an array.

    Copies elements of this map to an array. Fills the given array `xs` with at most `len` elements of this map, starting at position `start`. Copying will stop once either the end of the current map is reached, 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.

    len

      the maximal number of elements to copy.

    Definition Classes
      IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce

40. #### def copyToArray (xs: Array[(A, B)]): Unit

    [use case] Copies values of this map to an array.

    [use case]

    Copies values of this map to an array. Fills the given array `xs` with values of this map. Copying will stop once either the end of the current map is reached, or the end of the array is reached.

    xs

      the array to fill.

    Attributes
      abstract
    Definition Classes
      GenTraversableOnce

41. #### def copyToArray [B >: (A, B)] (xs: Array[B]): Unit

    Copies values of this map to an array.

    Copies values of this map to an array. Fills the given array `xs` with values of this map. Copying will stop once either the end of the current map is reached, or the end of the array is reached.

    B

      the type of the elements of the array.

    xs

      the array to fill.

    Definition Classes
      TraversableOnce → GenTraversableOnce

42. #### def copyToArray (xs: Array[(A, B)], start: Int): Unit

    [use case] Copies values of this map to an array.

    [use case]

    Copies values of this map to an array. Fills the given array `xs` with values of this map, beginning at index `start`. Copying will stop once either the end of the current map is reached, or the end of the array is reached.

    xs

      the array to fill.

    start

      the starting index.

    Attributes
      abstract
    Definition Classes
      GenTraversableOnce

43. #### def copyToArray [B >: (A, B)] (xs: Array[B], start: Int): Unit

    Copies values of this map to an array.

    Copies values of this map to an array. Fills the given array `xs` with values of this map, beginning at index `start`. Copying will stop once either the end of the current map is reached, 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.

    Definition Classes
      TraversableOnce → GenTraversableOnce

44. #### def copyToBuffer [B >: (A, B)] (dest: Buffer[B]): Unit

    Copies all elements of this map to a buffer.

    Copies all elements of this map to a buffer.

    dest

      The buffer to which elements are copied.

    Definition Classes
      TraversableOnce

45. #### def count (p: ((A, B)) ⇒ Boolean): Int

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

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

    p

      the predicate used to test elements.

    returns

      the number of elements satisfying the predicate `p`.

    Definition Classes
      TraversableOnce → GenTraversableOnce

46. #### 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
      MapLike → GenMapLike

47. #### def drop (n: Int): This

    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 map.

    returns

      a map consisting of all elements of this map except the first `n` ones, or else the empty map, if this map has less than `n` elements.

    Definition Classes
      IterableLike → TraversableLike → GenTraversableLike

48. #### def dropRight (n: Int): This

    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 map consisting of all elements of this map except the last `n` ones, or else the empty map, if this map has less than `n` elements.

    Definition Classes
      IterableLike

49. #### def dropWhile (p: ((A, B)) ⇒ Boolean): This

    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 map whose first element does not satisfy the predicate `p`.

    Definition Classes
      TraversableLike → GenTraversableLike

50. #### 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.

    Attributes
      final
    Definition Classes
      AnyRef

51. #### 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
      GenMapLike → Equals → AnyRef → Any

52. #### def exists (p: ((A, B)) ⇒ Boolean): Boolean

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

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

    p

      the predicate used to test elements.

    returns

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

    Definition Classes
      IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce

53. #### def filter (p: ((A, B)) ⇒ Boolean): This

    Selects all elements of this map which satisfy a predicate.

    Selects all elements of this map which satisfy a predicate.

    p

      the predicate used to test elements.

    returns

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

    Definition Classes
      TraversableLike → GenTraversableLike

54. #### 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
      MapLike

55. #### def filterNot (p: ((A, B)) ⇒ Boolean): This

    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
      MapLike → TraversableLike → GenTraversableLike

56. #### 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()

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

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

    Finds the first element of the 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 map that satisfies `p`, or `None` if none exists.

    Definition Classes
      IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce

58. #### def firstKey : A

    Returns the first key of the collection.

    Returns the first key of the collection.

    Definition Classes
      SortedMapLike → Sorted

59. #### def flatMap [B] (f: ((A, B)) ⇒ GenTraversableOnce[B]): Map[B]

    [use case] Builds a new collection by applying a function to all elements of this map and concatenating the results.

    [use case]

    Builds a new collection by applying a function to all elements of this map and concatenating the results.

    B

      the element type of the returned collection.

    f

      the function to apply to each element.

    returns

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

    Attributes
      abstract
    Definition Classes
      GenTraversableLike

60. #### def flatMap [B, That] (f: ((A, B)) ⇒ GenTraversableOnce[B])(implicit bf: CanBuildFrom[This, B, That]): That

    Builds a new collection by applying a function to all elements of this map and concatenating the results.

    Builds a new collection by applying a function to all elements of this map and concatenating the results.

    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.

    f

      the function to apply to each 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

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

    Definition Classes
      TraversableLike → GenTraversableLike → FilterMonadic

61. #### def fold [A1 >: (A, B)] (z: A1)(op: (A1, A1) ⇒ A1): A1

    Folds the elements of this sequence using the specified associative binary operator.

    Folds the elements of this sequence using the specified associative binary operator. The order in which the elements are reduced is unspecified and may be nondeterministic.

    Note this method has a different signature than the `foldLeft` and `foldRight` methods of the trait `Traversable`. The result of folding may only be a supertype of this parallel collection's type parameter `T`.

    z

      a neutral element for the fold operation, it may be added to the result an arbitrary number of times, not changing 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
      TraversableOnce → GenTraversableOnce

62. #### def foldLeft [B] (z: B)(op: (B, (A, B)) ⇒ B): B

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

    Applies a binary operator to a start value and all elements of this 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 map, going left to right with the start value `z` on the left:

                      op(...op(z, x,,1,,), x,,2,,, ..., x,,n,,)

      where `x,,1,,, ..., x,,n,,` are the elements of this map.

    Definition Classes
      TraversableOnce → GenTraversableOnce

63. #### def foldRight [B] (z: B)(op: ((A, B), B) ⇒ B): B

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

    Applies a binary operator to all elements of this 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 map, going right to left with the start value `z` on the right:

                      op(x,,1,,, op(x,,2,,, ... op(x,,n,,, z)...))

      where `x,,1,,, ..., x,,n,,` are the elements of this map.

    Definition Classes
      IterableLike → TraversableOnce → GenTraversableOnce

64. #### def forall (p: ((A, B)) ⇒ Boolean): Boolean

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

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

    p

      the predicate used to test elements.

    returns

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

    Definition Classes
      IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce

65. #### def foreach (f: ((A, B)) ⇒ Unit): Unit

    [use case] Applies a function `f` to all elements of this map.

    [use case]

    Applies a function `f` to all elements of this map.

    f

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

    Attributes
      abstract
    Definition Classes
      IterableLike

66. #### def foreach [U] (f: ((A, B)) ⇒ U): Unit

    Applies a function `f` to all elements of this map.

    Applies a function `f` to all elements of this map.

    Note: this method underlies the implementation of most other bulk operations. Subclasses should re-implement this method if a more efficient implementation exists.

    U

      the type parameter describing the result of function `f`. This result will always be ignored. Typically `U` is `Unit`, but this is not necessary.

    f

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

    Definition Classes
      IterableLike → TraversableLike → GenTraversableLike → TraversableOnce → GenTraversableOnce → FilterMonadic

67. #### def from (from: A): This

    Creates a ranged projection of this collection with no upper-bound.

    Creates a ranged projection of this collection with no upper-bound.

    from

      The lower-bound (inclusive) of the ranged projection.

    Definition Classes
      Sorted

68. #### def getClass (): java.lang.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.

    Attributes
      final
    Definition Classes
      AnyRef → Any

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

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

    [use case]

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

    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.

    Attributes
      abstract
    Definition Classes
      MapLike

70. #### def getOrElse [B1 >: B] (key: A, default: ⇒ B1): B1

    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.

    B1

      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
      MapLike

71. #### def groupBy [K] (f: ((A, B)) ⇒ K): Map[K, This]

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

    Partitions this map into a map of 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 map.

    K

      the type of keys returned by the discriminator function.

    f

      the discriminator function.

    returns

      A map from keys to 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 map of those elements `x` for which `f(x)` equals `k`.

    Definition Classes
      TraversableLike → GenTraversableLike

72. #### def grouped (size: Int): Iterator[This]

    Partitions elements in fixed size maps.

    Partitions elements in fixed size maps.

    size

      the number of elements per group

    returns

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

    Definition Classes
      IterableLike
    See also

      Iterator#grouped

73. #### def hasAll (j: Iterator[A]): Boolean

    Attributes
      protected
    Definition Classes
      Sorted

74. #### def hasDefiniteSize : Boolean

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

    Tests whether this 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
      TraversableLike → TraversableOnce → GenTraversableOnce

75. #### 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

76. #### def head : (A, B)

    Selects the first element of this map.

    Selects the first element of this map.

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

    returns

      the first element of this map.

    Definition Classes
      IterableLike → GenIterableLike → TraversableLike → GenTraversableLike

77. #### 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 map if it is nonempty, `None` if it is empty.

    Definition Classes
      TraversableLike

78. #### def init : This

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

    Definition Classes
      TraversableLike

79. #### def inits : Iterator[This]

    Iterates over the inits of this map.

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

    returns

      an iterator over all the inits of this map

    Definition Classes
      TraversableLike
    Example:

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

80. #### 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
      MapLike → PartialFunction

81. #### 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
      MapLike → IterableLike → GenIterableLike → TraversableLike → TraversableOnce → GenTraversableOnce

82. #### 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.

    Attributes
      final
    Definition Classes
      Any

83. #### def isTraversableAgain : Boolean

    Tests whether this map can be repeatedly traversed.

    Tests whether this map can be repeatedly traversed.

    returns

      `true`

    Attributes
      final
    Definition Classes
      GenTraversableLike → GenTraversableOnce

84. #### def keySet : SortedSet[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
      SortedMapLike → MapLike → Sorted

85. #### def keys : Iterable[A]

    Creates an iterator for all keys.

    Creates an iterator for all keys.

    returns

      an iterator over all keys.

    Definition Classes
      MapLike
    Annotations
      @migration
    Migration

      "As of 2.8, keys returns Iterable[A] rather than Iterator[A]."

86. #### def keysIterator : Iterator[A]

    Creates an iterator for all keys.

    Creates an iterator for all keys.

    returns

      an iterator over all keys.

    Definition Classes
      MapLike

87. #### 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 map.

    Definition Classes
      TraversableLike

88. #### def lastKey : A

    Returns the last key of the collection.

    Returns the last key of the collection.

    Definition Classes
      SortedMapLike → Sorted

89. #### 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 map$ if it is nonempty, `None` if it is empty.

    Definition Classes
      TraversableLike

90. #### 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

91. #### def map [B] (f: ((A, B)) ⇒ B): Map[B]

    [use case] Builds a new collection by applying a function to all elements of this map.

    [use case]

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

    B

      the element type of the returned collection.

    f

      the function to apply to each element.

    returns

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

    Attributes
      abstract
    Definition Classes
      GenTraversableLike

92. #### def map [B, That] (f: ((A, B)) ⇒ B)(implicit bf: CanBuildFrom[This, B, That]): That

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

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

    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.

    f

      the function to apply to each 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

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

    Definition Classes
      TraversableLike → GenTraversableLike → FilterMonadic

93. #### 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
      MapLike

94. #### def max : (A, B)

    [use case] Finds the largest element.

    [use case]

    Finds the largest element.

    returns

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

    Attributes
      abstract
    Definition Classes
      GenTraversableOnce

95. #### def max [B >: (A, B)] (implicit cmp: Ordering[B]): (A, B)

    Finds the largest element.

    Finds the largest element.

    B

      The type over which the ordering is defined.

    cmp

      An ordering to be used for comparing elements.

    returns

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

    Definition Classes
      TraversableOnce → GenTraversableOnce

96. #### def maxBy [B] (f: ((A, B)) ⇒ B)(implicit cmp: Ordering[B]): (A, B)

    Definition Classes
      TraversableOnce → GenTraversableOnce

97. #### def min : (A, B)

    [use case] Finds the smallest element.

    [use case]

    Finds the smallest element.

    returns

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

    Attributes
      abstract
    Definition Classes
      GenTraversableOnce

98. #### def min [B >: (A, B)] (implicit cmp: Ordering[B]): (A, B)

    Finds the smallest element.

    Finds the smallest element.

    B

      The type over which the ordering is defined.

    cmp

      An ordering to be used for comparing elements.

    returns

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

    Definition Classes
      TraversableOnce → GenTraversableOnce

99. #### def minBy [B] (f: ((A, B)) ⇒ B)(implicit cmp: Ordering[B]): (A, B)

    Definition Classes
      TraversableOnce → GenTraversableOnce

100. #### def mkString : String

     Displays all elements of this map in a string.

     Displays all elements of this map in a string.

     returns

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

     Definition Classes
       TraversableOnce → GenTraversableOnce

101. #### def mkString (sep: String): String

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

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

     sep

       the separator string.

     returns

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

     Definition Classes
       TraversableOnce → GenTraversableOnce
     Example:

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

102. #### def mkString (start: String, sep: String, end: String): String

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

     Displays all elements of this 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 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 map are separated by the string `sep`.

     Definition Classes
       TraversableOnce → GenTraversableOnce
     Example:

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

103. #### 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.

     Attributes
       final
     Definition Classes
       AnyRef

104. #### def newBuilder : Builder[(A, B), This]

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

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

     Attributes
       protected[this]
     Definition Classes
       MapLike → TraversableLike → HasNewBuilder

105. #### def nonEmpty : Boolean

     Tests whether the map is not empty.

     Tests whether the map is not empty.

     returns

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

     Definition Classes
       TraversableOnce → GenTraversableOnce

106. #### 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.

     Attributes
       final
     Definition Classes
       AnyRef

107. #### 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.

     Attributes
       final
     Definition Classes
       AnyRef

108. #### 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

109. #### 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

110. #### 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
       MapLike → TraversableLike → Parallelizable

111. #### def partition (p: ((A, B)) ⇒ Boolean): (This, This)

     Partitions this map in two maps according to a predicate.

     Partitions this map in two maps according to a predicate.

     p

       the predicate on which to partition.

     returns

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

     Definition Classes
       TraversableLike → GenTraversableLike

112. #### def product : (A, B)

     [use case] Multiplies up the elements of this collection.

     [use case]

     Multiplies up the elements of this collection.

     returns

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

     Attributes
       abstract
     Definition Classes
       GenTraversableOnce

113. #### def product [B >: (A, B)] (implicit num: Numeric[B]): B

     Multiplies up the elements of this collection.

     Multiplies up the elements of this collection.

     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 map with respect to the `*` operator in `num`.

     Definition Classes
       TraversableOnce → GenTraversableOnce

114. #### def range (from: A, until: A): This

     Creates a ranged projection of this collection with both a lower-bound and an upper-bound.

     Creates a ranged projection of this collection with both a lower-bound and an upper-bound.

     from

       The upper-bound (exclusive) of the ranged projection.

     until

       ...

     returns

       ...

     Definition Classes
       Sorted

115. #### def reduce [A1 >: (A, B)] (op: (A1, A1) ⇒ A1): A1

     Reduces the elements of this sequence using the specified associative binary operator.

     Reduces the elements of this sequence using the specified associative binary operator.

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

     Note this method has a different signature than the `reduceLeft` and `reduceRight` methods of the trait `Traversable`. The result of reducing may only be a supertype of this parallel collection's type parameter `T`.

     op

       A binary operator that must be associative.

     returns

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

     Definition Classes
       TraversableOnce → GenTraversableOnce

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

     Definition Classes
       TraversableOnce

117. #### def reduceLeftOption [B >: (A, B)] (op: (B, (A, B)) ⇒ B): Option[B]

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

     Optionally applies a binary operator to all elements of this 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 map is nonempty, `None` otherwise.

     Definition Classes
       TraversableOnce → GenTraversableOnce

118. #### def reduceOption [A1 >: (A, B)] (op: (A1, A1) ⇒ A1): Option[A1]

     Optionally reduces the elements of this sequence using the specified associative binary operator.

     Optionally reduces the elements of this sequence using the specified associative binary operator.

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

     Note this method has a different signature than the `reduceLeftOption` and `reduceRightOption` methods of the trait `Traversable`. The result of reducing may only be a supertype of this parallel collection's type parameter `T`.

     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
       TraversableOnce → GenTraversableOnce

119. #### def reduceRight [B >: (A, B)] (op: ((A, B), B) ⇒ B): B

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

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

                       op(x,,1,,, op(x,,2,,, ..., op(x,,n-1,,, x,,n,,)...))

       where `x,,1,,, ..., x,,n,,` are the elements of this map.

     Definition Classes
       IterableLike → TraversableOnce → GenTraversableOnce

120. #### def reduceRightOption [B >: (A, B)] (op: ((A, B), B) ⇒ B): Option[B]

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

     Optionally applies a binary operator to all elements of this 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 map is nonempty, `None` otherwise.

     Definition Classes
       TraversableOnce → GenTraversableOnce

121. #### def repr : This

     The collection of type map underlying this `TraversableLike` object.

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

     Definition Classes
       TraversableLike → GenTraversableLike

122. #### def reversed : List[(A, B)]

     Attributes
       protected[this]
     Definition Classes
       TraversableOnce

123. #### def sameElements [B >: (A, B)] (that: Iterable[B]): Boolean

     Definition Classes
       IterableLike
     Annotations
       @bridge()

124. #### def sameElements (that: GenIterable[(A, B)]): Boolean

     [use case] Checks if the other iterable collection contains the same elements in the same order as this map.

     [use case]

     Checks if the other iterable collection contains the same elements in the same order as this map.

     that

       the collection to compare with.

     returns

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

     Attributes
       abstract
     Definition Classes
       GenIterableLike

125. #### def sameElements [B >: (A, B)] (that: GenIterable[B]): Boolean

     Checks if the other iterable collection contains the same elements in the same order as this map.

     Checks if the other iterable collection contains the same elements in the same order as this map.

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

     B

       the type of the elements of collection `that`.

     that

       the collection to compare with.

     returns

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

     Definition Classes
       IterableLike → GenIterableLike

126. #### def scan [B >: (A, B), That] (z: B)(op: (B, B) ⇒ B)(implicit cbf: CanBuildFrom[This, 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 map containing the prefix scan of the elements in this map

     Definition Classes
       TraversableLike → GenTraversableLike

127. #### def scanLeft [B, That] (z: B)(op: (B, (A, B)) ⇒ B)(implicit bf: CanBuildFrom[This, 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
       TraversableLike → GenTraversableLike

128. #### def scanRight [B, That] (z: B)(op: ((A, B), B) ⇒ B)(implicit bf: CanBuildFrom[This, 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
       TraversableLike → GenTraversableLike
     Annotations
       @migration
     Migration

       "This scanRight definition has changed in 2.9.\n" + "The previous behavior can be reproduced with scanRight.reverse."

129. #### def size : Int

     The size of this map.

     The size of this map.

     returns

       the number of elements in this map.

     Definition Classes
       TraversableOnce → GenTraversableOnce

130. #### def slice (from: Int, until: Int): This

     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 map.

     until

       the highest index to EXCLUDE from this map.

     returns

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

     Definition Classes
       IterableLike → TraversableLike → GenTraversableLike

131. #### def sliding [B >: (A, B)] (size: Int, step: Int): Iterator[This]

     Definition Classes
       IterableLike

132. #### def sliding [B >: (A, B)] (size: Int): Iterator[This]

     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 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

133. #### def span (p: ((A, B)) ⇒ Boolean): (This, This)

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

     Splits this 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 map whose elements all satisfy `p`, and the rest of this map.

     Definition Classes
       TraversableLike → GenTraversableLike

134. #### def splitAt (n: Int): (This, This)

     Splits this map into two at a given position.

     Splits this 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 maps consisting of the first `n` elements of this map, and the other elements.

     Definition Classes
       TraversableLike → GenTraversableLike

135. #### 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 map. Unless overridden in subclasses, the string prefix of every map is `"Map"`.

     Definition Classes
       MapLike → TraversableLike → GenTraversableLike

136. #### def sum : (A, B)

     [use case] Sums up the elements of this collection.

     [use case]

     Sums up the elements of this collection.

     returns

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

     Attributes
       abstract
     Definition Classes
       GenTraversableOnce

137. #### def sum [B >: (A, B)] (implicit num: Numeric[B]): B

     Sums up the elements of this collection.

     Sums up the elements of this collection.

     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 map with respect to the `+` operator in `num`.

     Definition Classes
       TraversableOnce → GenTraversableOnce

138. #### def synchronized [T0] (arg0: ⇒ T0): T0

     Attributes
       final
     Definition Classes
       AnyRef

139. #### def tail : This

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

     Definition Classes
       TraversableLike → GenTraversableLike

140. #### def tails : Iterator[This]

     Iterates over the tails of this map.

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

     returns

       an iterator over all the tails of this map

     Definition Classes
       TraversableLike
     Example:

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

141. #### def take (n: Int): This

     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 map.

     returns

       a map consisting only of the first `n` elements of this map, or else the whole map, if it has less than `n` elements.

     Definition Classes
       IterableLike → TraversableLike → GenTraversableLike

142. #### def takeRight (n: Int): This

     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 map consisting only of the last `n` elements of this map, or else the whole map, if it has less than `n` elements.

     Definition Classes
       IterableLike

143. #### def takeWhile (p: ((A, B)) ⇒ Boolean): This

     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 map whose elements all satisfy the predicate `p`.

     Definition Classes
       IterableLike → TraversableLike → GenTraversableLike

144. #### def thisCollection : Iterable[(A, B)]

     The underlying collection seen as an instance of `Map`.

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

     Attributes
       protected[this]
     Definition Classes
       IterableLike → TraversableLike

145. #### def to (to: A): This

     Create a range projection of this collection with no lower-bound.

     Create a range projection of this collection with no lower-bound.

     to

       The upper-bound (inclusive) of the ranged projection.

     Definition Classes
       Sorted

146. #### def toArray : Array[(A, B)]

     [use case] Converts this map to an array.

     [use case]

     Converts this map to an array.

     returns

       an array containing all elements of this map.

     Attributes
       abstract
     Definition Classes
       GenTraversableOnce

147. #### def toArray [B >: (A, B)] (implicit arg0: ClassManifest[B]): Array[B]

     Converts this map to an array.

     Converts this map to an array.

     B

       the type of the elements of the array. A `ClassManifest` for this type must be available.

     returns

       an array containing all elements of this map.

     Definition Classes
       TraversableOnce → GenTraversableOnce

148. #### def toBuffer [C >: (A, B)] : Buffer[C]

     Converts this map to a mutable buffer.

     Converts this map to a mutable buffer.

     returns

       a buffer containing all elements of this map.

     Definition Classes
       MapLike → TraversableOnce → GenTraversableOnce

149. #### def toCollection (repr: This): Iterable[(A, B)]

     A conversion from collections of type `Repr` to `Map` objects.

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

     Attributes
       protected[this]
     Definition Classes
       IterableLike → TraversableLike

150. #### def toIndexedSeq [B >: (A, B)] : IndexedSeq[B]

     Converts this map to an indexed sequence.

     Converts this map to an indexed sequence.

     returns

       an indexed sequence containing all elements of this map.

     Definition Classes
       TraversableOnce → GenTraversableOnce

151. #### def toIterable : Iterable[(A, B)]

     Converts this map to an iterable collection.

     Converts this 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 map.

     Definition Classes
       IterableLike → TraversableOnce → GenTraversableOnce

152. #### def toIterator : Iterator[(A, B)]

     Returns an Iterator over the elements in this map.

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

     returns

       an Iterator containing all elements of this map.

     Definition Classes
       TraversableLike → GenTraversableOnce

153. #### def toList : List[(A, B)]

     Converts this map to a list.

     Converts this map to a list.

     returns

       a list containing all elements of this map.

     Definition Classes
       TraversableOnce → GenTraversableOnce

154. #### def toMap [T, U] : Map[T, U]

     [use case] Converts this map to a map.

     [use case]

     Converts this map to a map. This method is unavailable unless the elements are members of Tuple2, each ((T, U)) becoming a key-value pair in the map. Duplicate keys will be overwritten by later keys: if this is an unordered collection, which key is in the resulting map is undefined.

     returns

       a map containing all elements of this map.

     Attributes
       abstract
     Definition Classes
       GenTraversableOnce

155. #### def toMap [T, U] (implicit ev: <:<[(A, B), (T, U)]): Map[T, U]

     Converts this map to a map.

     Converts this map to a map. This method is unavailable unless the elements are members of Tuple2, each ((T, U)) becoming a key-value pair in the map. Duplicate keys will be overwritten by later keys: if this is an unordered collection, which key is in the resulting map is undefined.

     returns

       a map containing all elements of this map.

     Definition Classes
       TraversableOnce → GenTraversableOnce

156. #### def toSeq : Seq[(A, B)]

     Overridden for efficiency.

     Overridden for efficiency.

     returns

       a sequence containing all elements of this map.

     Definition Classes
       MapLike → TraversableOnce → GenTraversableOnce

157. #### def toSet [B >: (A, B)] : Set[B]

     Converts this map to a set.

     Converts this map to a set.

     returns

       a set containing all elements of this map.

     Definition Classes
       TraversableOnce → GenTraversableOnce

158. #### def toStream : Stream[(A, B)]

     Converts this map to a stream.

     Converts this map to a stream.

     returns

       a stream containing all elements of this map.

     Definition Classes
       IterableLike → TraversableLike → GenTraversableOnce

159. #### def toString (): String

     Converts this map to a string.

     Converts this map to a string.

     returns

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

     Definition Classes
       MapLike → TraversableLike → Function1 → AnyRef → Any

160. #### def toTraversable : Traversable[(A, B)]

     Converts this map to an unspecified Traversable.

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

     returns

       a Traversable containing all elements of this map.

     Definition Classes
       TraversableLike → TraversableOnce → GenTraversableOnce

161. #### def until (until: A): This

     Creates a ranged projection of this collection with no lower-bound.

     Creates a ranged projection of this collection with no lower-bound.

     until

       The upper-bound (exclusive) of the ranged projection.

     Definition Classes
       Sorted

162. #### def updated [B1 >: B] (key: A, value: B1): SortedMap[A, B1]

     Add a key/value pair to this map.

     Add a key/value pair to this map.

     B1

       the type of the added value

     key

       the key

     value

       the value

     returns

       A new map with the new binding added to this map

     Definition Classes
       SortedMapLike → MapLike

163. #### 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
       MapLike
     Annotations
       @migration
     Migration

       "As of 2.8, values returns Iterable[B] rather than Iterator[B]."

164. #### 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
       MapLike

165. #### def view (from: Int, until: Int): IterableView[(A, B), This]

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

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

     Note: the difference between `view` and `slice` is that `view` produces a view of the current map, whereas `slice` produces a new 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 map, starting at index `from` and extending up to (but not including) index `until`.

     Definition Classes
       IterableLike → TraversableLike

166. #### def view : IterableView[(A, B), This]

     Creates a non-strict view of this map.

     Creates a non-strict view of this map.

     returns

       a non-strict view of this map.

     Definition Classes
       IterableLike → TraversableLike

167. #### def wait (): Unit

     Attributes
       final
     Definition Classes
       AnyRef
     Annotations
       @throws()

168. #### def wait (arg0: Long, arg1: Int): Unit

     Attributes
       final
     Definition Classes
       AnyRef
     Annotations
       @throws()

169. #### def wait (arg0: Long): Unit

     Attributes
       final
     Definition Classes
       AnyRef
     Annotations
       @throws()

170. #### def withFilter (p: ((A, B)) ⇒ Boolean): FilterMonadic[(A, B), This]

     Creates a non-strict filter of this map.

     Creates a non-strict filter of this 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 map which satisfy the predicate `p`.

     Definition Classes
       TraversableLike → FilterMonadic

171. #### def zip [A1 >: (A, B), B, That] (that: Iterable[B])(implicit bf: CanBuildFrom[This, (A1, B), That]): That

     Definition Classes
       IterableLike
     Annotations
       @bridge()

172. #### def zip [B] (that: GenIterable[B]): Map[((A, B), B)]

     [use case] Returns a map formed from this map and another iterable collection by combining corresponding elements in pairs.

     [use case]

     Returns a map formed from this 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 collection of type `That` containing pairs consisting of corresponding elements of this map and `that`. The length of the returned collection is the minimum of the lengths of this map and `that`.

     Attributes
       abstract
     Definition Classes
       GenIterableLike

173. #### def zip [A1 >: (A, B), B, That] (that: GenIterable[B])(implicit bf: CanBuildFrom[This, (A1, B), That]): That

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

     Returns a map formed from this 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.

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

     A1

       the type of the first half of the returned pairs (this is always a supertype of the collection's element type `A`).

     B

       the type of the second half of the returned pairs

     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 `(A1, B)` being admissible for that class, which means that an implicit instance of type `CanBuildFrom[Repr, (A1, B), That]`. is found.

     that

       The iterable providing the second half of each result pair

     bf

       an implicit value of class `CanBuildFrom` which determines the result class `That` from the current representation type `Repr` and the new element type `(A1, B)`.

     returns

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

     Definition Classes
       IterableLike → GenIterableLike

174. #### def zipAll [B, A1 >: (A, B), That] (that: Iterable[B], thisElem: A1, thatElem: B)(implicit bf: CanBuildFrom[This, (A1, B), That]): That

     Definition Classes
       IterableLike
     Annotations
       @bridge()

175. #### def zipAll [B] (that: Iterable[B], thisElem: (A, B), thatElem: B): Map[((A, B), B)]

     [use case] Returns a map formed from this map and another iterable collection by combining corresponding elements in pairs.

     [use case]

     Returns a map formed from this 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 map is shorter than `that`.

     thatElem

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

     returns

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

     Attributes
       abstract
     Definition Classes
       GenIterableLike

176. #### def zipAll [B, A1 >: (A, B), That] (that: GenIterable[B], thisElem: A1, thatElem: B)(implicit bf: CanBuildFrom[This, (A1, B), That]): That

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

     Returns a map formed from this 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.

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

     that

       the iterable providing the second half of each result pair

     thisElem

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

     thatElem

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

     returns

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

     Definition Classes
       IterableLike → GenIterableLike

177. #### def zipWithIndex : Map[((A, B), Int)]

     [use case] Zips this map with its indices.

     [use case]

     Zips this map with its indices.

     returns

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

     Attributes
       abstract
     Definition Classes
       GenIterableLike

178. #### def zipWithIndex [A1 >: (A, B), That] (implicit bf: CanBuildFrom[This, (A1, Int), That]): That

     Zips this map with its indices.

     Zips this map with its indices.

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

     A1

       the type of the first half of the returned pairs (this is always a supertype of the collection's element type `A`).

     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 `(A1, Int)` being admissible for that class, which means that an implicit instance of type `CanBuildFrom[Repr, (A1, Int), That]`. is found.

     returns

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

     Definition Classes
       IterableLike → GenIterableLike

### Deprecated Value Members

1. #### def elements : Iterator[(A, B)]

   Definition Classes
     IterableLike
   Annotations
     @deprecated
   Deprecated

     use `iterator' instead`

2. #### def first : (A, B)

   Definition Classes
     IterableLike
   Annotations
     @deprecated
   Deprecated

     use `head' instead`

3. #### def firstOption : Option[(A, B)]

   `None` if iterable is empty.

   `None` if iterable is empty.

   Definition Classes
     IterableLike
   Annotations
     @deprecated
   Deprecated

     use `headOption' instead`

4. #### def mapElements [C] (f: (B) ⇒ C): Map[A, C]

   Definition Classes
     MapLike
   Annotations
     @deprecated
   Deprecated

     use `mapValues' instead`

5. #### def projection : IterableView[(A, B), This]

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

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

   Definition Classes
     IterableLike
   Annotations
     @deprecated
   Deprecated

     use `view' instead`

### Inherited from MapLike[A, B, This]

### Inherited from Subtractable[A, This]

### Inherited from GenMapLike[A, B, This]

### Inherited from IterableLike[(A, B), This]

### Inherited from GenIterableLike[(A, B), This]

### Inherited from TraversableLike[(A, B), This]

### Inherited from GenTraversableLike[(A, B), This]

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

### Inherited from TraversableOnce[(A, B)]

### Inherited from GenTraversableOnce[(A, B)]

### Inherited from FilterMonadic[(A, B), This]

### Inherited from HasNewBuilder[(A, B), This]

### Inherited from Equals

### Inherited from PartialFunction[A, B]

### Inherited from (A) ⇒ B

### Inherited from Sorted[A, This]

### Inherited from AnyRef

### Inherited from Any