scala.collection.mutable

MapLike

trait MapLike [A, B, +This <: MapLike[A, B, This] with Map[A, B]] extends MapLike[A, B, This] with Builder[(A, B), This] with Growable[(A, B)] with Shrinkable[A] with Cloneable[This] with Parallelizable[(A, B), ParMap[A, B]]

A template trait for mutable maps.

Implementation note: This trait provides most of the operations of a Map independently of its representation. It is typically inherited by concrete implementations of maps.

To implement a concrete map, you need to provide implementations of the following methods:

      def get(key: A): Option[B]
      def iterator: Iterator[(A, B)]
      def + [B1 >: B](kv: (A, B1)): This
      def -(key: A): This

If you wish that methods like take, drop, filter also return the same kind of map you should also override:

      def empty: This

It is also good idea to override methods foreach and size for efficiency.

Self Type
MapLike[A, B, This]
Source
MapLike.scala
Since

2.8

Linear Supertypes
Cloneable[This], Shrinkable[A], Builder[(A, B), This], Growable[(A, B)], 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, AnyRef, Any
Known Subclasses
Ordering
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Inherited
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  1. MapLike
  2. Cloneable
  3. Shrinkable
  4. Builder
  5. Growable
  6. MapLike
  7. Subtractable
  8. GenMapLike
  9. IterableLike
  10. GenIterableLike
  11. TraversableLike
  12. GenTraversableLike
  13. Parallelizable
  14. TraversableOnce
  15. GenTraversableOnce
  16. FilterMonadic
  17. HasNewBuilder
  18. Equals
  19. PartialFunction
  20. Function1
  21. AnyRef
  22. 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 DefaultValuesIterable extends Iterable[B]

    The implementation class of the iterable returned by values.

  3. type Self = This

    The type implementing this traversable

    The type implementing this traversable

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

    A class supporting filtered operations.

Abstract Value Members

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

    Adds a new key/value pair to this map.

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

    kv

    the key/value pair.

    returns

    the map itself

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

    Removes a key from this map.

    Removes a key from this map.

    key

    the key to be removed

    returns

    the map itself.

    Attributes
    abstract
    Definition Classes
    MapLikeShrinkable
  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
    MapLikeGenMapLike
  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
    MapLikeIterableLikeGenIterableLike
  6. def seq : Map[A, B]

    Attributes
    abstract
    Definition Classes
    GenMapLikeParallelizableGenTraversableOnce

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)*): Map[A, B1]

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

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

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

    B1

    the type of the added values

    elem1

    the first element to add.

    elem2

    the second element to add.

    elems

    the remaining elements to add.

    returns

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

    Definition Classes
    MapLikeMapLike
    Annotations
    @migration
    Migration

    "As of 2.8, this operation creates a new map. To add an element as a\n"+ "side effect to an existing map and return that map itself, use +=."

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

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

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

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

    B1

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

    kv

    the key/value mapping to be added

    returns

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

    Definition Classes
    MapLikeMapLikeGenMapLike
    Annotations
    @migration
    Migration

    "As of 2.8, this operation creates a new map. To add an element as a\n"+ "side effect to an existing map and return that map itself, use +=."

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

    Definition Classes
    MapLikeMapLike
    Annotations
    @bridge()
  7. def ++ [B1 >: B] (xs: GenTraversableOnce[(A, B1)]): Map[A, B1]

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

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

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

    B1

    the type of the added values

    xs

    the traversable object.

    returns

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

    Definition Classes
    MapLikeMapLike
    Annotations
    @migration
    Migration

    "As of 2.8, this operation creates a new map. To add the elements as a\n"+ "side effect to an existing map and return that map itself, use ++=."

  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]): Shrinkable[B]

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

    [use case]

    Concatenates this shrinkable collection 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 shrinkable collection 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 shrinkable collection with the elements of a traversable collection.

    Concatenates this shrinkable collection 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 shrinkable collection followed by all elements of that.

    Definition Classes
    TraversableLikeGenTraversableLike
  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]): Shrinkable[B]

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

    [use case]

    Concatenates this shrinkable collection 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 shrinkable collection 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 shrinkable collection with the elements of a traversable collection.

    Concatenates this shrinkable collection 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 shrinkable collection followed by all elements of that.

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

    adds all elements produced by a TraversableOnce to this shrinkable collection.

    adds all elements produced by a TraversableOnce to this shrinkable collection.

    returns

    the shrinkable collection itself.

    Definition Classes
    Growable
  15. def += (elem1: (A, B), elem2: (A, B), elems: (A, B)*): MapLike.this.type

    adds two or more elements to this shrinkable collection.

    adds two or more elements to this shrinkable collection.

    elem1

    the first element to add.

    elem2

    the second element to add.

    elems

    the remaining elements to add.

    returns

    the shrinkable collection itself

    Definition Classes
    Growable
  16. def - (elem1: A, elem2: A, elems: A*): This

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

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

    elem1

    the first element to remove.

    elem2

    the second element to remove.

    elems

    the remaining elements to remove.

    returns

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

    Definition Classes
    MapLikeSubtractable
    Annotations
    @migration
    Migration

    "As of 2.8, this operation creates a new map. To remove an element as a\n"+ "side effect to an existing map and return that map itself, use -=."

  17. def - (key: A): This

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

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

    key

    the key to be removed

    returns

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

    Definition Classes
    MapLikeMapLikeSubtractableGenMapLike
    Annotations
    @migration
    Migration

    "As of 2.8, this operation creates a new map. To remove an element as a\n"+ "side effect to an existing map and return that map itself, use -=."

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

    Definition Classes
    MapLikeSubtractable
    Annotations
    @bridge()
  19. def -- (xs: GenTraversableOnce[A]): This

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

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

    xs

    the traversable object.

    returns

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

    Definition Classes
    MapLikeSubtractable
    Annotations
    @migration
    Migration

    "As of 2.8, this operation creates a new map. To remove the elements as a\n"+ "side effect to an existing map and return that map itself, use --=."

  20. def --= (xs: TraversableOnce[A]): MapLike.this.type

    Removes all elements produced by an iterator from this shrinkable collection.

    Removes all elements produced by an iterator from this shrinkable collection.

    returns

    the shrinkable collection itself

    Definition Classes
    Shrinkable
  21. def -= (elem1: A, elem2: A, elems: A*): MapLike.this.type

    Removes two or more elements from this shrinkable collection.

    Removes two or more elements from this shrinkable collection.

    elem1

    the first element to remove.

    elem2

    the second element to remove.

    elems

    the remaining elements to remove.

    returns

    the shrinkable collection itself

    Definition Classes
    Shrinkable
  22. def /: [B] (z: B)(op: (B, (A, B)) ⇒ B): B

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

    Applies a binary operator to a start value and all elements of this shrinkable collection, 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 shrinkable collection, 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 shrinkable collection.

    Definition Classes
    TraversableOnceGenTraversableOnce
  23. 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
  24. def :\ [B] (z: B)(op: ((A, B), B) ⇒ B): B

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

    Applies a binary operator to all elements of this shrinkable collection 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 shrinkable collection, 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 shrinkable collection.

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

    Attributes
    final
    Definition Classes
    AnyRef
  26. 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
  27. def addString (b: StringBuilder, start: String, sep: String, end: String): StringBuilder

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

    Appends all bindings of this map to a string builder using start, end, and separator strings. The written text begins with the string start and ends with the string end. Inside, the string representations of all bindings of this map in the form of key -> value are separated by the string sep.

    b

    the builder to which strings are appended.

    start

    the starting string.

    sep

    the separator string.

    end

    the ending string.

    returns

    the string builder b to which elements were appended.

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

    Appends all elements of this shrinkable collection to a string builder.

    Appends all elements of this shrinkable collection to a string builder. The written text consists of the string representations (w.r.t. the method toString) of all elements of this shrinkable collection 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
  29. def addString (b: StringBuilder, sep: String): StringBuilder

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

    Appends all elements of this shrinkable collection 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 shrinkable collection, 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
  30. 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
    TraversableOnceGenTraversableOnce
  31. def andThen [C] (k: (B) ⇒ C): PartialFunction[A, C]

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

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

    C

    the result type of the transformation function.

    k

    the transformation function

    returns

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

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

    Retrieves the value which is associated with the given key.

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

    key

    the key

    returns

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

    Definition Classes
    MapLikeGenMapLikeFunction1
  33. 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
  34. 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 shrinkable collection should be compared

    returns

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

    Definition Classes
    IterableLikeEquals
  35. def clear (): Unit

    Removes all bindings from the map.

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

    Definition Classes
    MapLikeBuilderGrowable
  36. def clone (): This

    Create a copy of the receiver object.

    Create a copy of the receiver object.

    The default implementation of the clone method is platform dependent.

    returns

    a copy of the receiver object.

    Definition Classes
    MapLikeCloneable → AnyRef
  37. def collect [B] (pf: PartialFunction[(A, B), B]): Shrinkable[B]

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

    [use case]

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

    B

    the element type of the returned collection.

    pf

    the partial function which filters and maps the shrinkable collection.

    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
  38. 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 shrinkable collection on which the function is defined.

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

    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
    TraversableLikeGenTraversableLike
  39. def collectFirst [B] (pf: PartialFunction[(A, B), B]): Option[B]

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

    Finds the first element of the shrinkable collection 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)

  40. 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
  41. 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
  42. def copyToArray (xs: Array[(A, B)], start: Int, len: Int): Unit

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

    [use case]

    Copies elements of this shrinkable collection to an array. Fills the given array xs with at most len elements of this shrinkable collection, starting at position start. Copying will stop once either the end of the current shrinkable collection 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
  43. def copyToArray [B >: (A, B)] (xs: Array[B], start: Int, len: Int): Unit

    Copies elements of this shrinkable collection to an array.

    Copies elements of this shrinkable collection to an array. Fills the given array xs with at most len elements of this shrinkable collection, starting at position start. Copying will stop once either the end of the current shrinkable collection 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
    IterableLikeTraversableLikeTraversableOnceGenTraversableOnce
  44. def copyToArray (xs: Array[(A, B)]): Unit

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

    [use case]

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

    xs

    the array to fill.

    Attributes
    abstract
    Definition Classes
    GenTraversableOnce
  45. def copyToArray [B >: (A, B)] (xs: Array[B]): Unit

    Copies values of this shrinkable collection to an array.

    Copies values of this shrinkable collection to an array. Fills the given array xs with values of this shrinkable collection. Copying will stop once either the end of the current shrinkable collection 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
    TraversableOnceGenTraversableOnce
  46. def copyToArray (xs: Array[(A, B)], start: Int): Unit

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

    [use case]

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

    xs

    the array to fill.

    start

    the starting index.

    Attributes
    abstract
    Definition Classes
    GenTraversableOnce
  47. def copyToArray [B >: (A, B)] (xs: Array[B], start: Int): Unit

    Copies values of this shrinkable collection to an array.

    Copies values of this shrinkable collection to an array. Fills the given array xs with values of this shrinkable collection, beginning at index start. Copying will stop once either the end of the current shrinkable collection 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
    TraversableOnceGenTraversableOnce
  48. def copyToBuffer [B >: (A, B)] (dest: Buffer[B]): Unit

    Copies all elements of this shrinkable collection to a buffer.

    Copies all elements of this shrinkable collection to a buffer.

    dest

    The buffer to which elements are copied.

    Definition Classes
    TraversableOnce
  49. def count (p: ((A, B)) ⇒ Boolean): Int

    Counts the number of elements in the shrinkable collection which satisfy a predicate.

    Counts the number of elements in the shrinkable collection which satisfy a predicate.

    p

    the predicate used to test elements.

    returns

    the number of elements satisfying the predicate p.

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

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

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

    key

    the given key value for which a binding is missing.

    Definition Classes
    MapLikeGenMapLike
  51. 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 shrinkable collection.

    returns

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

    Definition Classes
    IterableLikeTraversableLikeGenTraversableLike
  52. 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 shrinkable collection consisting of all elements of this shrinkable collection except the last n ones, or else the empty shrinkable collection, if this shrinkable collection has less than n elements.

    Definition Classes
    IterableLike
  53. 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 shrinkable collection whose first element does not satisfy the predicate p.

    Definition Classes
    TraversableLikeGenTraversableLike
  54. 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
  55. def equals (that: Any): Boolean

    Compares two maps structurally; i.

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

    that

    the other map

    returns

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

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

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

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

    p

    the predicate used to test elements.

    returns

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

    Definition Classes
    IterableLikeTraversableLikeTraversableOnceGenTraversableOnce
  57. def filter (p: ((A, B)) ⇒ Boolean): This

    Selects all elements of this shrinkable collection which satisfy a predicate.

    Selects all elements of this shrinkable collection which satisfy a predicate.

    p

    the predicate used to test elements.

    returns

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

    Definition Classes
    TraversableLikeGenTraversableLike
  58. 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
  59. 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
    MapLikeTraversableLikeGenTraversableLike
  60. 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()
  61. def find (p: ((A, B)) ⇒ Boolean): Option[(A, B)]

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

    Finds the first element of the shrinkable collection 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 shrinkable collection that satisfies p, or None if none exists.

    Definition Classes
    IterableLikeTraversableLikeTraversableOnceGenTraversableOnce
  62. def flatMap [B] (f: ((A, B)) ⇒ GenTraversableOnce[B]): Shrinkable[B]

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

    [use case]

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

    Attributes
    abstract
    Definition Classes
    GenTraversableLike
  63. 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 shrinkable collection and concatenating the results.

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

    Definition Classes
    TraversableLikeGenTraversableLikeFilterMonadic
  64. 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
    TraversableOnceGenTraversableOnce
  65. def foldLeft [B] (z: B)(op: (B, (A, B)) ⇒ B): B

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

    Applies a binary operator to a start value and all elements of this shrinkable collection, 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 shrinkable collection, 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 shrinkable collection.

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

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

    Applies a binary operator to all elements of this shrinkable collection 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 shrinkable collection, 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 shrinkable collection.

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

    Tests whether a predicate holds for all elements of this shrinkable collection.

    Tests whether a predicate holds for all elements of this shrinkable collection.

    p

    the predicate used to test elements.

    returns

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

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

    [use case] Applies a function f to all elements of this shrinkable collection.

    [use case]

    Applies a function f to all elements of this shrinkable collection.

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

    Applies a function f to all elements of this shrinkable collection.

    Applies a function f to all elements of this shrinkable collection.

    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
    IterableLikeTraversableLikeGenTraversableLikeTraversableOnceGenTraversableOnceFilterMonadic
  70. 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
  71. 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
  72. 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
  73. def getOrElseUpdate (key: A, op: ⇒ B): B

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

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

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

    key

    the key to test

    op

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

    returns

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

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

    Partitions this shrinkable collection into a map of shrinkable collections according to some discriminator function.

    Partitions this shrinkable collection into a map of shrinkable collections 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 shrinkable collection.

    K

    the type of keys returned by the discriminator function.

    f

    the discriminator function.

    returns

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

    Definition Classes
    TraversableLikeGenTraversableLike
  75. def grouped (size: Int): Iterator[This]

    Partitions elements in fixed size shrinkable collections.

    Partitions elements in fixed size shrinkable collections.

    size

    the number of elements per group

    returns

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

    Definition Classes
    IterableLike
    See also

    Iterator#grouped

  76. def hasDefiniteSize : Boolean

    Tests whether this shrinkable collection is known to have a finite size.

    Tests whether this shrinkable collection is known to have a finite size. All strict collections are known to have finite size. For a non-strict collection such as Stream, the predicate returns true if all elements have been computed. It returns false if the stream is not yet evaluated to the end.

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

    returns

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

    Definition Classes
    TraversableLikeTraversableOnceGenTraversableOnce
  77. 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
  78. def head : (A, B)

    Selects the first element of this shrinkable collection.

    Selects the first element of this shrinkable collection.

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

    returns

    the first element of this shrinkable collection.

    Definition Classes
    IterableLikeGenIterableLikeTraversableLikeGenTraversableLike
  79. 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 shrinkable collection if it is nonempty, None if it is empty.

    Definition Classes
    TraversableLike
  80. 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 shrinkable collection consisting of all elements of this shrinkable collection except the last one.

    Definition Classes
    TraversableLike
  81. def inits : Iterator[This]

    Iterates over the inits of this shrinkable collection.

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

    returns

    an iterator over all the inits of this shrinkable collection

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

  82. 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
    MapLikePartialFunction
  83. def isEmpty : Boolean

    Tests whether the map is empty.

    Tests whether the map is empty.

    returns

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

    Definition Classes
    MapLikeIterableLikeGenIterableLikeTraversableLikeTraversableOnceGenTraversableOnce
  84. 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
  85. def isTraversableAgain : Boolean

    Tests whether this shrinkable collection can be repeatedly traversed.

    Tests whether this shrinkable collection can be repeatedly traversed.

    returns

    true

    Attributes
    final
    Definition Classes
    GenTraversableLikeGenTraversableOnce
  86. def keySet : Set[A]

    Collects all keys of this map in a set.

    Collects all keys of this map in a set.

    returns

    a set containing all keys of this map.

    Definition Classes
    MapLike
  87. 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]."

  88. 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
  89. 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 shrinkable collection.

    Definition Classes
    TraversableLike
  90. 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 shrinkable collection$ if it is nonempty, None if it is empty.

    Definition Classes
    TraversableLike
  91. 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

  92. def map [B] (f: ((A, B)) ⇒ B): Shrinkable[B]

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

    [use case]

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

    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 shrinkable collection and collecting the results.

    Attributes
    abstract
    Definition Classes
    GenTraversableLike
  93. 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 shrinkable collection.

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

    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 shrinkable collection and collecting the results.

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

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

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

    NewTo

    the type of collection returned by f.

    f

    the transformation function.

    returns

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

    Definition Classes
    Builder
  95. 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
  96. def max : (A, B)

    [use case] Finds the largest element.

    [use case]

    Finds the largest element.

    returns

    the largest element of this shrinkable collection with respect to the ordering cmp.

    Attributes
    abstract
    Definition Classes
    GenTraversableOnce
  97. 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 shrinkable collection with respect to the ordering cmp.

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

    Definition Classes
    TraversableOnceGenTraversableOnce
  99. def min : (A, B)

    [use case] Finds the smallest element.

    [use case]

    Finds the smallest element.

    returns

    the smallest element of this shrinkable collection with respect to the ordering cmp.

    Attributes
    abstract
    Definition Classes
    GenTraversableOnce
  100. 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 shrinkable collection with respect to the ordering cmp.

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

    Definition Classes
    TraversableOnceGenTraversableOnce
  102. def mkString : String

    Displays all elements of this shrinkable collection in a string.

    Displays all elements of this shrinkable collection in a string.

    returns

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

    Definition Classes
    TraversableOnceGenTraversableOnce
  103. def mkString (sep: String): String

    Displays all elements of this shrinkable collection in a string using a separator string.

    Displays all elements of this shrinkable collection in a string using a separator string.

    sep

    the separator string.

    returns

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

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

  104. def mkString (start: String, sep: String, end: String): String

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

    Displays all elements of this shrinkable collection 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 shrinkable collection. 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 shrinkable collection are separated by the string sep.

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

  105. 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
  106. def newBuilder : Builder[(A, B), This]

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

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

    Overrides MapLike implementation for better efficiency.

    Attributes
    protected[this]
    Definition Classes
    MapLikeMapLikeTraversableLikeHasNewBuilder
  107. def nonEmpty : Boolean

    Tests whether the shrinkable collection is not empty.

    Tests whether the shrinkable collection is not empty.

    returns

    true if the shrinkable collection contains at least one element, false otherwise.

    Definition Classes
    TraversableOnceGenTraversableOnce
  108. 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
  109. 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
  110. 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
  111. 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
  112. def parCombiner : Combiner[(A, B), ParMap[A, B]]

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

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

    returns

    a combiner for the parallel collection of type ParRepr

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

    Partitions this shrinkable collection in two shrinkable collections according to a predicate.

    Partitions this shrinkable collection in two shrinkable collections according to a predicate.

    p

    the predicate on which to partition.

    returns

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

    Definition Classes
    TraversableLikeGenTraversableLike
  114. 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 shrinkable collection with respect to the * operator in num.

    Attributes
    abstract
    Definition Classes
    GenTraversableOnce
  115. 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 shrinkable collection with respect to the * operator in num.

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

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

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

    key

    the key to update

    value

    the new value

    returns

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

  117. 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
    TraversableOnceGenTraversableOnce
  118. def reduceLeft [B >: (A, B)] (op: (B, (A, B)) ⇒ B): B

    Definition Classes
    TraversableOnce
  119. def reduceLeftOption [B >: (A, B)] (op: (B, (A, B)) ⇒ B): Option[B]

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

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

    Definition Classes
    TraversableOnceGenTraversableOnce
  120. 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
    TraversableOnceGenTraversableOnce
  121. def reduceRight [B >: (A, B)] (op: ((A, B), B) ⇒ B): B

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

    Applies a binary operator to all elements of this shrinkable collection, 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 shrinkable collection, 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 shrinkable collection.

    Definition Classes
    IterableLikeTraversableOnceGenTraversableOnce
  122. def reduceRightOption [B >: (A, B)] (op: ((A, B), B) ⇒ B): Option[B]

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

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

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

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

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

    key

    the key to be removed

    returns

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

  124. def repr : This

    The collection of type shrinkable collection underlying this TraversableLike object.

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

    Definition Classes
    TraversableLikeGenTraversableLike
  125. def result (): This

    The result when this map is used as a builder

    The result when this map is used as a builder

    returns

    the map representation itself.

    Definition Classes
    MapLikeBuilder
  126. def retain (p: (A, B) ⇒ Boolean): MapLike.this.type

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

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

    p

    The test predicate

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

    Attributes
    protected[this]
    Definition Classes
    TraversableOnce
  128. def sameElements [B >: (A, B)] (that: Iterable[B]): Boolean

    Definition Classes
    IterableLike
    Annotations
    @bridge()
  129. 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 shrinkable collection.

    [use case]

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

    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
  130. 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 shrinkable collection.

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

    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
    IterableLikeGenIterableLike
  131. 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 shrinkable collection containing the prefix scan of the elements in this shrinkable collection

    Definition Classes
    TraversableLikeGenTraversableLike
  132. 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
    TraversableLikeGenTraversableLike
  133. 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
    TraversableLikeGenTraversableLike
    Annotations
    @migration
    Migration

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

  134. def size : Int

    The size of this shrinkable collection.

    The size of this shrinkable collection.

    returns

    the number of elements in this shrinkable collection.

    Definition Classes
    TraversableOnceGenTraversableOnce
  135. def sizeHint (coll: scala.collection.TraversableLike[_, _], delta: Int = 0): Unit

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

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

    coll

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

    delta

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

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

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

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

    size

    the hint how many elements will be added.

    Definition Classes
    Builder
  137. def sizeHintBounded (size: Int, boundingColl: scala.collection.TraversableLike[_, _]): Unit

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

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

    size

    the hint how many elements will be added.

    boundingColl

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

    Definition Classes
    Builder
  138. 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 shrinkable collection.

    until

    the highest index to EXCLUDE from this shrinkable collection.

    returns

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

    Definition Classes
    IterableLikeTraversableLikeGenTraversableLike
  139. def sliding [B >: (A, B)] (size: Int, step: Int): Iterator[This]

    Definition Classes
    IterableLike
  140. 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 shrinkable collections 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

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

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

    Splits this shrinkable collection 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 shrinkable collection whose elements all satisfy p, and the rest of this shrinkable collection.

    Definition Classes
    TraversableLikeGenTraversableLike
  142. def splitAt (n: Int): (This, This)

    Splits this shrinkable collection into two at a given position.

    Splits this shrinkable collection 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 shrinkable collections consisting of the first n elements of this shrinkable collection, and the other elements.

    Definition Classes
    TraversableLikeGenTraversableLike
  143. 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 shrinkable collection. Unless overridden in subclasses, the string prefix of every map is "Map".

    Definition Classes
    MapLikeTraversableLikeGenTraversableLike
  144. 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 shrinkable collection with respect to the + operator in num.

    Attributes
    abstract
    Definition Classes
    GenTraversableOnce
  145. 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 shrinkable collection with respect to the + operator in num.

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

    Attributes
    final
    Definition Classes
    AnyRef
  147. 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 shrinkable collection consisting of all elements of this shrinkable collection except the first one.

    Definition Classes
    TraversableLikeGenTraversableLike
  148. def tails : Iterator[This]

    Iterates over the tails of this shrinkable collection.

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

    returns

    an iterator over all the tails of this shrinkable collection

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

  149. 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 shrinkable collection.

    returns

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

    Definition Classes
    IterableLikeTraversableLikeGenTraversableLike
  150. 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 shrinkable collection consisting only of the last n elements of this shrinkable collection, or else the whole shrinkable collection, if it has less than n elements.

    Definition Classes
    IterableLike
  151. 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 shrinkable collection whose elements all satisfy the predicate p.

    Definition Classes
    IterableLikeTraversableLikeGenTraversableLike
  152. def thisCollection : Iterable[(A, B)]

    The underlying collection seen as an instance of Shrinkable.

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

    Attributes
    protected[this]
    Definition Classes
    IterableLikeTraversableLike
  153. def toArray : Array[(A, B)]

    [use case] Converts this shrinkable collection to an array.

    [use case]

    Converts this shrinkable collection to an array.

    returns

    an array containing all elements of this shrinkable collection.

    Attributes
    abstract
    Definition Classes
    GenTraversableOnce
  154. def toArray [B >: (A, B)] (implicit arg0: ClassManifest[B]): Array[B]

    Converts this shrinkable collection to an array.

    Converts this shrinkable collection 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 shrinkable collection.

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

    Converts this shrinkable collection to a mutable buffer.

    Converts this shrinkable collection to a mutable buffer.

    returns

    a buffer containing all elements of this shrinkable collection.

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

    A conversion from collections of type Repr to Shrinkable objects.

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

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

    Converts this shrinkable collection to an indexed sequence.

    Converts this shrinkable collection to an indexed sequence.

    returns

    an indexed sequence containing all elements of this shrinkable collection.

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

    Converts this shrinkable collection to an iterable collection.

    Converts this shrinkable collection 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 shrinkable collection.

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

    Returns an Iterator over the elements in this shrinkable collection.

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

    returns

    an Iterator containing all elements of this shrinkable collection.

    Definition Classes
    TraversableLikeGenTraversableOnce
  160. def toList : List[(A, B)]

    Converts this shrinkable collection to a list.

    Converts this shrinkable collection to a list.

    returns

    a list containing all elements of this shrinkable collection.

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

    [use case] Converts this shrinkable collection to a map.

    [use case]

    Converts this shrinkable collection 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 shrinkable collection.

    Attributes
    abstract
    Definition Classes
    GenTraversableOnce
  162. def toMap [T, U] (implicit ev: <:<[(A, B), (T, U)]): Map[T, U]

    Converts this shrinkable collection to a map.

    Converts this shrinkable collection 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 shrinkable collection.

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

    Overridden for efficiency.

    Overridden for efficiency.

    returns

    a sequence containing all elements of this shrinkable collection.

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

    Converts this shrinkable collection to a set.

    Converts this shrinkable collection to a set.

    returns

    a set containing all elements of this shrinkable collection.

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

    Converts this shrinkable collection to a stream.

    Converts this shrinkable collection to a stream.

    returns

    a stream containing all elements of this shrinkable collection.

    Definition Classes
    IterableLikeTraversableLikeGenTraversableOnce
  166. def toString (): String

    Converts this shrinkable collection to a string.

    Converts this shrinkable collection to a string.

    returns

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

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

    Converts this shrinkable collection to an unspecified Traversable.

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

    returns

    a Traversable containing all elements of this shrinkable collection.

    Definition Classes
    TraversableLikeTraversableOnceGenTraversableOnce
  168. def transform (f: (A, B) ⇒ B): MapLike.this.type

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

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

    f

    the transformation to apply

    returns

    the map itself.

  169. def update (key: A, value: B): Unit

    Adds a new key/value pair to this map.

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

    key

    The key to update

    value

    The new value

  170. def updated [B1 >: B] (key: A, value: B1): Map[A, B1]

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

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

    B1

    the type of the added value

    key

    The key to add

    value

    The new value

    returns

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

    Definition Classes
    MapLikeMapLike
  171. 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]."

  172. 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
  173. def view (from: Int, until: Int): IterableView[(A, B), This]

    Creates a non-strict view of a slice of this shrinkable collection.

    Creates a non-strict view of a slice of this shrinkable collection.

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

    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 shrinkable collection, starting at index from and extending up to (but not including) index until.

    Definition Classes
    IterableLikeTraversableLike
  174. def view : IterableView[(A, B), This]

    Creates a non-strict view of this shrinkable collection.

    Creates a non-strict view of this shrinkable collection.

    returns

    a non-strict view of this shrinkable collection.

    Definition Classes
    IterableLikeTraversableLike
  175. def wait (): Unit

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

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

    Attributes
    final
    Definition Classes
    AnyRef
    Annotations
    @throws()
  178. def withFilter (p: ((A, B)) ⇒ Boolean): FilterMonadic[(A, B), This]

    Creates a non-strict filter of this shrinkable collection.

    Creates a non-strict filter of this shrinkable collection.

    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 shrinkable collection which satisfy the predicate p.

    Definition Classes
    TraversableLikeFilterMonadic
  179. def zip [A1 >: (A, B), B, That] (that: Iterable[B])(implicit bf: CanBuildFrom[This, (A1, B), That]): That

    Definition Classes
    IterableLike
    Annotations
    @bridge()
  180. def zip [B] (that: GenIterable[B]): Shrinkable[((A, B), B)]

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

    [use case]

    Returns a shrinkable collection formed from this shrinkable collection 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 shrinkable collection and that. The length of the returned collection is the minimum of the lengths of this shrinkable collection and that.

    Attributes
    abstract
    Definition Classes
    GenIterableLike
  181. def zip [A1 >: (A, B), B, That] (that: GenIterable[B])(implicit bf: CanBuildFrom[This, (A1, B), That]): That

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

    Returns a shrinkable collection formed from this shrinkable collection 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 shrinkable collection and that. The length of the returned collection is the minimum of the lengths of this shrinkable collection and that.

    Definition Classes
    IterableLikeGenIterableLike
  182. 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()
  183. def zipAll [B] (that: Iterable[B], thisElem: (A, B), thatElem: B): Shrinkable[((A, B), B)]

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

    [use case]

    Returns a shrinkable collection formed from this shrinkable collection 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 shrinkable collection is shorter than that.

    thatElem

    the element to be used to fill up the result if that is shorter than this shrinkable collection.

    returns

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

    Attributes
    abstract
    Definition Classes
    GenIterableLike
  184. def zipAll [B, A1 >: (A, B), That] (that: GenIterable[B], thisElem: A1, thatElem: B)(implicit bf: CanBuildFrom[This, (A1, B), That]): That

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

    Returns a shrinkable collection formed from this shrinkable collection 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 shrinkable collection is shorter than that.

    thatElem

    the element to be used to fill up the result if that is shorter than this shrinkable collection.

    returns

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

    Definition Classes
    IterableLikeGenIterableLike
  185. def zipWithIndex : Shrinkable[((A, B), Int)]

    [use case] Zips this shrinkable collection with its indices.

    [use case]

    Zips this shrinkable collection with its indices.

    returns

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

    Attributes
    abstract
    Definition Classes
    GenIterableLike
  186. def zipWithIndex [A1 >: (A, B), That] (implicit bf: CanBuildFrom[This, (A1, Int), That]): That

    Zips this shrinkable collection with its indices.

    Zips this shrinkable collection 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 shrinkable collection paired with their index. Indices start at 0.

    Definition Classes
    IterableLikeGenIterableLike

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

  6. def removeKey (key: A): Option[B]

    If given key is defined in this map, remove it and return associated value as an Option.

    If given key is defined in this map, remove it and return associated value as an Option. If key is not present return None.

    key

    the key to be removed

    Annotations
    @deprecated
    Deprecated

    Use remove' instead

Inherited from Cloneable[This]

Inherited from Shrinkable[A]

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

Inherited from Growable[(A, B)]

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 AnyRef

Inherited from Any