scala.collection

IterableProxyLike

trait IterableProxyLike[+A, +Repr <: IterableLike[A, Repr] with Iterable[A]] extends IterableLike[A, Repr] with TraversableProxyLike[A, Repr]

This trait implements a proxy for Iterable objects. It forwards all calls to a different Iterable object.

Source
IterableProxyLike.scala
Version

2.8

Since

2.8

Linear Supertypes
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Inherited
  1. IterableProxyLike
  2. TraversableProxyLike
  3. Proxy
  4. IterableLike
  5. GenIterableLike
  6. TraversableLike
  7. GenTraversableLike
  8. Parallelizable
  9. TraversableOnce
  10. GenTraversableOnce
  11. FilterMonadic
  12. HasNewBuilder
  13. Equals
  14. AnyRef
  15. Any
Implicitly
  1. by traversable2ops
  2. by MonadOps
  3. by any2stringadd
  4. by any2stringfmt
  5. by any2ArrowAssoc
  6. by any2Ensuring
  7. by alternateImplicit
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  1. Public
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Type Members

  1. type Self = Repr

    The type implementing this traversable

    The type implementing this traversable

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

    A class supporting filtered operations.

Abstract Value Members

  1. abstract def newBuilder: Builder[A, Repr]

    Creates a new builder for this collection type.

    Creates a new builder for this collection type.

    Attributes
    protected[this]
    Definition Classes
    TraversableLikeHasNewBuilder
  2. abstract def self: Repr

    Definition Classes
    TraversableProxyLikeProxy
  3. abstract def seq: TraversableOnce[A]

    Definition Classes
    Parallelizable

Concrete Value Members

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

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

    Test two objects for inequality.

    Test two objects for inequality.

    returns

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

    Definition Classes
    Any
  3. final def ##(): Int

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

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

    returns

    a hash value consistent with ==

    Definition Classes
    AnyRef → Any
  4. def +(other: String): String

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to StringAdd performed by method any2stringadd in scala.Predef.
    Definition Classes
    StringAdd
  5. def ++[B](that: GenTraversableOnce[B]): Iterable[B]

    [use case] Returns a new iterable collection containing the elements from the left hand operand followed by the elements from the right hand operand.

    [use case]

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

    Example:

    scala> val a = LinkedList(1)
    a: scala.collection.mutable.LinkedList[Int] = LinkedList(1)
    
    scala> val b = LinkedList(2)
    b: scala.collection.mutable.LinkedList[Int] = LinkedList(2)
    
    scala> val c = a ++ b
    c: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2)
    
    scala> val d = LinkedList('a')
    d: scala.collection.mutable.LinkedList[Char] = LinkedList(a)
    
    scala> val e = c ++ d
    e: scala.collection.mutable.LinkedList[AnyVal] = LinkedList(1, 2, a)
    B

    the element type of the returned collection.

    that

    the traversable to append.

    returns

    a new iterable collection which contains all elements of this iterable collection followed by all elements of that.

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLike
    Full Signature

    def ++[B >: A, That](xs: GenTraversableOnce[B])(implicit bf: CanBuildFrom[Repr, B, That]): That

  6. def ++:[B >: A, That](that: Traversable[B])(implicit bf: CanBuildFrom[Repr, B, That]): That

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

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

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

    Example:

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

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

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

    B

    the element type of the returned collection.

    That

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

    that

    the traversable to append.

    bf

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

    returns

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

    Definition Classes
    TraversableLike
  7. def ++:[B](that: TraversableOnce[B]): Iterable[B]

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

    [use case]

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

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

    Example:

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

    the element type of the returned collection.

    that

    the traversable to append.

    returns

    a new iterable collection which contains all elements of this iterable collection followed by all elements of that.

    Definition Classes
    TraversableLike
    Full Signature

    def ++:[B >: A, That](that: TraversableOnce[B])(implicit bf: CanBuildFrom[Repr, B, That]): That

  8. def ->[B](y: B): (IterableProxyLike[A, Repr], B)

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to ArrowAssoc[IterableProxyLike[A, Repr]] performed by method any2ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc
    Annotations
    @inline()
  9. def /:[B](z: B)(op: (B, A) ⇒ B): B

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

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

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

    Examples:

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

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

    Note: will not terminate for infinite-sized collections.

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

    B

    the result type of the binary operator.

    z

    the start value.

    op

    the binary operator.

    returns

    the result of inserting op between consecutive elements of this iterable collection, going left to right with the start value z on the left:

    op(...op(op(z, x_1), x_2), ..., x_n)

    where x1, ..., xn are the elements of this iterable collection.

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
  10. def :\[B](z: B)(op: (A, B) ⇒ B): B

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

    Applies a binary operator to all elements of this iterable 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: will not terminate for infinite-sized collections.

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

    Examples:

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

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

    the result type of the binary operator.

    z

    the start value

    op

    the binary operator

    returns

    the result of inserting op between consecutive elements of this iterable collection, going right to left with the start value z on the right:

    op(x_1, op(x_2, ... op(x_n, z)...))

    where x1, ..., xn are the elements of this iterable collection.

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
  11. final def ==(arg0: AnyRef): Boolean

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

    Test two objects for equality.

    Test two objects for equality. The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).

    returns

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

    Definition Classes
    Any
  13. def addString(b: mutable.StringBuilder): mutable.StringBuilder

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

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

    Example:

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

    the string builder to which elements are appended.

    returns

    the string builder b to which elements were appended.

    Definition Classes
    TraversableProxyLikeTraversableOnce
  14. def addString(b: mutable.StringBuilder, sep: String): mutable.StringBuilder

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

    Appends all elements of this iterable 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 iterable collection, separated by the string sep.

    Example:

    scala> val a = LinkedList(1,2,3,4)
    a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)
    
    scala> val b = new StringBuilder()
    b: StringBuilder =
    
    scala> a.addString(b, ", ")
    res0: StringBuilder = 1, 2, 3, 4
    b

    the string builder to which elements are appended.

    sep

    the separator string.

    returns

    the string builder b to which elements were appended.

    Definition Classes
    TraversableProxyLikeTraversableOnce
  15. def addString(b: mutable.StringBuilder, start: String, sep: String, end: String): mutable.StringBuilder

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

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

    Example:

    scala> val a = LinkedList(1,2,3,4)
    a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)
    
    scala> val b = new StringBuilder()
    b: StringBuilder =
    
    scala> a.addString(b, "LinkedList(", ", ", ")")
    res1: StringBuilder = LinkedList(1, 2, 3, 4)
    b

    the string builder to which elements 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
    TraversableProxyLikeTraversableOnce
  16. def aggregate[B](z: B)(seqop: (B, A) ⇒ B, combop: (B, B) ⇒ B): B

    Aggregates the results of applying an operator to subsequent elements.

    Aggregates the results of applying an operator to subsequent elements.

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

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

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

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

    B

    the type of accumulated results

    z

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

    seqop

    an operator used to accumulate results within a partition

    combop

    an associative operator used to combine results from different partitions

    Definition Classes
    TraversableOnceGenTraversableOnce
  17. final def asInstanceOf[T0]: T0

    Cast the receiver object to be of type T0.

    Cast the receiver object to be of type T0.

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

    returns

    the receiver object.

    Definition Classes
    Any
    Exceptions thrown
    ClassCastException

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

  18. def asParIterable: ParIterable[A]

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to TraversableOps[A] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  19. def asParSeq: ParSeq[A]

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to TraversableOps[A] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  20. 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 iterable collection should be compared

    returns

    true, if this iterable 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
  21. def clone(): AnyRef

    Create a copy of the receiver object.

    Create a copy of the receiver object.

    The default implementation of the clone method is platform dependent.

    returns

    a copy of the receiver object.

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

    not specified by SLS as a member of AnyRef

  22. def collect[B](pf: PartialFunction[A, B]): Iterable[B]

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

    [use case]

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

    B

    the element type of the returned collection.

    pf

    the partial function which filters and maps the iterable collection.

    returns

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

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLike
    Full Signature

    def collect[B, That](pf: PartialFunction[A, B])(implicit bf: CanBuildFrom[Repr, B, That]): That

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

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

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

    Note: may not terminate for infinite-sized collections.

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

    pf

    the partial function

    returns

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

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

  24. def copyToArray(xs: Array[A]): Unit

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

    [use case]

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

    Note: will not terminate for infinite-sized collections.

    xs

    the array to fill.

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
    Full Signature

    def copyToArray[B >: A](xs: Array[B]): Unit

  25. def copyToArray(xs: Array[A], start: Int): Unit

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

    [use case]

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

    Note: will not terminate for infinite-sized collections.

    xs

    the array to fill.

    start

    the starting index.

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
    Full Signature

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

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

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

    [use case]

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

    Note: will not terminate for infinite-sized collections.

    xs

    the array to fill.

    start

    the starting index.

    len

    the maximal number of elements to copy.

    Definition Classes
    TraversableProxyLikeTraversableLikeTraversableOnceGenTraversableOnce
    Full Signature

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

  27. def copyToBuffer[B >: A](dest: Buffer[B]): Unit

    Copies all elements of this iterable collection to a buffer.

    Copies all elements of this iterable collection to a buffer.

    Note: will not terminate for infinite-sized collections.

    dest

    The buffer to which elements are copied.

    Definition Classes
    TraversableProxyLikeTraversableOnce
  28. def count(p: (A) ⇒ Boolean): Int

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

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

    p

    the predicate used to test elements.

    returns

    the number of elements satisfying the predicate p.

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
  29. def drop(n: Int): Repr

    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 iterable collection.

    returns

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

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLike
  30. def dropRight(n: Int): Repr

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

    Definition Classes
    IterableProxyLikeIterableLike
  31. def dropWhile(p: (A) ⇒ Boolean): Repr

    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.

    returns

    the longest suffix of this iterable collection whose first element does not satisfy the predicate p.

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLike
  32. def ensuring(cond: (IterableProxyLike[A, Repr]) ⇒ Boolean, msg: ⇒ Any): IterableProxyLike[A, Repr]

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to Ensuring[IterableProxyLike[A, Repr]] performed by method any2Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  33. def ensuring(cond: (IterableProxyLike[A, Repr]) ⇒ Boolean): IterableProxyLike[A, Repr]

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to Ensuring[IterableProxyLike[A, Repr]] performed by method any2Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  34. def ensuring(cond: Boolean, msg: ⇒ Any): IterableProxyLike[A, Repr]

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to Ensuring[IterableProxyLike[A, Repr]] performed by method any2Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  35. def ensuring(cond: Boolean): IterableProxyLike[A, Repr]

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to Ensuring[IterableProxyLike[A, Repr]] performed by method any2Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  36. final def eq(arg0: AnyRef): Boolean

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

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

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

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

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

    returns

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

    Definition Classes
    AnyRef
  37. def equals(that: Any): Boolean

    Compares the receiver object (this) with the argument object (that) for equivalence.

    Compares the receiver object (this) with the argument object (that) for equivalence.

    Any implementation of this method should be an equivalence relation:

    • It is reflexive: for any instance x of type Any, x.equals(x) should return true.
    • It is symmetric: for any instances x and y of type Any, x.equals(y) should return true if and only if y.equals(x) returns true.
    • It is transitive: for any instances x, y, and z of type AnyRef if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.

    If you override this method, you should verify that your implementation remains an equivalence relation. Additionally, when overriding this method it is usually necessary to override hashCode to ensure that objects which are "equal" (o1.equals(o2) returns true) hash to the same scala.Int. (o1.hashCode.equals(o2.hashCode)).

    that

    the object to compare against this object for equality.

    returns

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

    Definition Classes
    ProxyAny
  38. def exists(p: (A) ⇒ Boolean): Boolean

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

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

    Note: may not terminate for infinite-sized collections.

    p

    the predicate used to test elements.

    returns

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

    Definition Classes
    TraversableProxyLikeTraversableLikeTraversableOnceGenTraversableOnce
  39. def filter(p: (A) ⇒ Boolean): Repr

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

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

    p

    the predicate used to test elements.

    returns

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

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLike
  40. def filterNot(p: (A) ⇒ Boolean): Repr

    Selects all elements of this iterable collection which do not satisfy a predicate.

    Selects all elements of this iterable collection which do not satisfy a predicate.

    p

    the predicate used to test elements.

    returns

    a new iterable collection consisting of all elements of this iterable collection that do not satisfy the given predicate p. The order of the elements is preserved.

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

    not specified by SLS as a member of AnyRef

  42. def find(p: (A) ⇒ Boolean): Option[A]

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

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

    Note: may not terminate for infinite-sized collections.

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

    p

    the predicate used to test elements.

    returns

    an option value containing the first element in the iterable collection that satisfies p, or None if none exists.

    Definition Classes
    TraversableProxyLikeTraversableLikeTraversableOnceGenTraversableOnce
  43. def flatMap[B](f: (A) ⇒ GenTraversableOnce[B]): Iterable[B]

    [use case] Builds a new collection by applying a function to all elements of this iterable collection and using the elements of the resulting collections.

    [use case]

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

    For example:

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

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

    // lettersOf will return a Seq[Char] of likely repeated letters, instead of a Set
    def lettersOf(words: Seq[String]) = words flatMap (word => word.toSet)
    
    // lettersOf will return a Set[Char], not a Seq
    def lettersOf(words: Seq[String]) = words.toSet flatMap (word => word.toSeq)
    
    // xs will be a an Iterable[Int]
    val xs = Map("a" -> List(11,111), "b" -> List(22,222)).flatMap(_._2)
    
    // ys will be a Map[Int, Int]
    val ys = Map("a" -> List(1 -> 11,1 -> 111), "b" -> List(2 -> 22,2 -> 222)).flatMap(_._2)
    B

    the element type of the returned collection.

    f

    the function to apply to each element.

    returns

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

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLikeFilterMonadic
    Full Signature

    def flatMap[B, That](f: (A) ⇒ GenTraversableOnce[B])(implicit bf: CanBuildFrom[Repr, B, That]): That

  44. def fold[A1 >: A](z: A1)(op: (A1, A1) ⇒ A1): A1

    Folds the elements of this iterable collection using the specified associative binary operator.

    Folds the elements of this iterable collection using the specified associative binary operator.

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

    A1

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

    z

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

    op

    a binary operator that must be associative

    returns

    the result of applying fold operator op between all the elements and z

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

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

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

    Note: will not terminate for infinite-sized collections.

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

    B

    the result type of the binary operator.

    z

    the start value.

    op

    the binary operator.

    returns

    the result of inserting op between consecutive elements of this iterable collection, going left to right with the start value z on the left:

    op(...op(z, x_1), x_2, ..., x_n)

    where x1, ..., xn are the elements of this iterable collection.

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

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

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

    Note: will not terminate for infinite-sized collections.

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

    B

    the result type of the binary operator.

    z

    the start value.

    op

    the binary operator.

    returns

    the result of inserting op between consecutive elements of this iterable collection, going right to left with the start value z on the right:

    op(x_1, op(x_2, ... op(x_n, z)...))

    where x1, ..., xn are the elements of this iterable collection.

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
  47. def forall(p: (A) ⇒ Boolean): Boolean

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

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

    Note: may not terminate for infinite-sized collections.

    p

    the predicate used to test elements.

    returns

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

    Definition Classes
    TraversableProxyLikeTraversableLikeTraversableOnceGenTraversableOnce
  48. def foreach(f: (A) ⇒ Unit): Unit

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

    [use case]

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

    Note: this method underlies the implementation of most other bulk operations. It's important to implement this method in an efficient way.

    f

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

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLikeTraversableOnceGenTraversableOnceFilterMonadic
    Full Signature

    def foreach[B](f: (A) ⇒ B): Unit

  49. def formatted(fmtstr: String): String

    Returns string formatted according to given format string.

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

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to StringFormat performed by method any2stringfmt in scala.Predef.
    Definition Classes
    StringFormat
    Annotations
    @inline()
  50. final def getClass(): Class[_]

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

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

    The nature of the representation is platform dependent.

    returns

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

    Definition Classes
    AnyRef → Any
    Note

    not specified by SLS as a member of AnyRef

  51. def groupBy[K](f: (A) ⇒ K): immutable.Map[K, Repr]

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

    Partitions this iterable collection into a map of iterable 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 iterable collection.

    K

    the type of keys returned by the discriminator function.

    f

    the discriminator function.

    returns

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

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLike
  52. def grouped(size: Int): Iterator[Repr]

    Partitions elements in fixed size iterable collections.

    Partitions elements in fixed size iterable collections.

    size

    the number of elements per group

    returns

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

    Definition Classes
    IterableProxyLikeIterableLike
    See also

    scala.collection.Iterator, method grouped

  53. def hasDefiniteSize: Boolean

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

    Tests whether this iterable 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
    TraversableProxyLikeTraversableLikeTraversableOnceGenTraversableOnce
  54. def hashCode(): Int

    Calculate a hash code value for the object.

    Calculate a hash code value for the object.

    The default hashing algorithm is platform dependent.

    Note that it is allowed for two objects to have identical hash codes (o1.hashCode.equals(o2.hashCode)) yet not be equal (o1.equals(o2) returns false). A degenerate implementation could always return 0. However, it is required that if two objects are equal (o1.equals(o2) returns true) that they have identical hash codes (o1.hashCode.equals(o2.hashCode)). Therefore, when overriding this method, be sure to verify that the behavior is consistent with the equals method.

    returns

    the hash code value for this object.

    Definition Classes
    ProxyAny
  55. def head: A

    Selects the first element of this iterable collection.

    Selects the first element of this iterable collection.

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

    returns

    the first element of this iterable collection.

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLike
    Exceptions thrown
    `NoSuchElementException`

    if the iterable collection is empty.

  56. def headOption: Option[A]

    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 iterable collection if it is nonempty, None if it is empty.

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLike
  57. def ifParSeq[R](isbody: (ParSeq[A]) ⇒ R): (TraversableOps[A])#Otherwise[R]

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to TraversableOps[A] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  58. def init: Repr

    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 iterable collection consisting of all elements of this iterable collection except the last one.

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLike
    Exceptions thrown
    `UnsupportedOperationException`

    if the iterable collection is empty.

  59. def inits: Iterator[Repr]

    Iterates over the inits of this iterable collection.

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

    returns

    an iterator over all the inits of this iterable collection

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

  60. def isEmpty: Boolean

    Tests whether this iterable collection is empty.

    Tests whether this iterable collection is empty.

    returns

    true if the iterable collection contain no elements, false otherwise.

    Definition Classes
    TraversableProxyLikeTraversableLikeTraversableOnceGenTraversableOnce
  61. final def isInstanceOf[T0]: Boolean

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

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

    Note that the result of the test is modulo Scala's erasure semantics. Therefore the expression 1.isInstanceOf[String] will return false, while the expression List(1).isInstanceOf[List[String]] will return true. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the specified type.

    returns

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

    Definition Classes
    Any
  62. def isParIterable: Boolean

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to TraversableOps[A] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  63. def isParSeq: Boolean

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to TraversableOps[A] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  64. def isParallel: Boolean

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to TraversableOps[A] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  65. final def isTraversableAgain: Boolean

    Tests whether this iterable collection can be repeatedly traversed.

    Tests whether this iterable collection can be repeatedly traversed.

    returns

    true

    Definition Classes
    TraversableLikeGenTraversableLikeGenTraversableOnce
  66. def iterator: Iterator[A]

    Creates a new iterator over all elements contained in this iterable object.

    Creates a new iterator over all elements contained in this iterable object.

    returns

    the new iterator

    Definition Classes
    IterableProxyLikeIterableLikeGenIterableLike
  67. def last: A

    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 iterable collection.

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLike
    Exceptions thrown
    NoSuchElementException

    If the iterable collection is empty.

  68. def lastOption: Option[A]

    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 iterable collection$ if it is nonempty, None if it is empty.

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLike
  69. def map[B](f: (A) ⇒ B): Iterable[B]

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

    [use case]

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

    B

    the element type of the returned collection.

    f

    the function to apply to each element.

    returns

    a new iterable collection resulting from applying the given function f to each element of this iterable collection and collecting the results.

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLikeFilterMonadic
    Full Signature

    def map[B, That](f: (A) ⇒ B)(implicit bf: CanBuildFrom[Repr, B, That]): That

  70. def max: A

    [use case] Finds the largest element.

    [use case]

    Finds the largest element.

    returns

    the largest element of this iterable collection.

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
    Full Signature

    def max[B >: A](implicit cmp: Ordering[B]): A

  71. def maxBy[B](f: (A) ⇒ B)(implicit cmp: Ordering[B]): A

    Definition Classes
    TraversableOnceGenTraversableOnce
  72. def min: A

    [use case] Finds the smallest element.

    [use case]

    Finds the smallest element.

    returns

    the smallest element of this iterable collection

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
    Full Signature

    def min[B >: A](implicit cmp: Ordering[B]): A

  73. def minBy[B](f: (A) ⇒ B)(implicit cmp: Ordering[B]): A

    Definition Classes
    TraversableOnceGenTraversableOnce
  74. def mkString: String

    Displays all elements of this iterable collection in a string.

    Displays all elements of this iterable collection in a string.

    returns

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

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
  75. def mkString(sep: String): String

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

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

    sep

    the separator string.

    returns

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

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

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

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

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

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

  77. final def ne(arg0: AnyRef): Boolean

    Equivalent to !(this eq that).

    Equivalent to !(this eq that).

    returns

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

    Definition Classes
    AnyRef
  78. def nonEmpty: Boolean

    Tests whether the iterable collection is not empty.

    Tests whether the iterable collection is not empty.

    returns

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

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
  79. final def notify(): Unit

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

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

    Definition Classes
    AnyRef
    Note

    not specified by SLS as a member of AnyRef

  80. final def notifyAll(): Unit

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

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

    Definition Classes
    AnyRef
    Note

    not specified by SLS as a member of AnyRef

  81. def par: ParIterable[A]

    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
  82. def parCombiner: Combiner[A, ParIterable[A]]

    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
    TraversableLikeParallelizable
  83. def partition(p: (A) ⇒ Boolean): (Repr, Repr)

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

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

    p

    the predicate on which to partition.

    returns

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

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLike
  84. def product: A

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

    [use case]

    Multiplies up the elements of this collection.

    returns

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

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
    Full Signature

    def product[B >: A](implicit num: Numeric[B]): B

  85. def reduce[A1 >: A](op: (A1, A1) ⇒ A1): A1

    Reduces the elements of this iterable collection using the specified associative binary operator.

    Reduces the elements of this iterable collection using the specified associative binary operator.

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

    A1

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

    op

    A binary operator that must be associative.

    returns

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

    Definition Classes
    TraversableOnceGenTraversableOnce
    Exceptions thrown
    UnsupportedOperationException

    if this iterable collection is empty.

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

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

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

    Note: will not terminate for infinite-sized collections.

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

    B

    the result type of the binary operator.

    op

    the binary operator.

    returns

    the result of inserting op between consecutive elements of this iterable collection, going left to right:

    op( op( ... op(x_1, x_2) ..., x_{n-1}), x_n)

    where x1, ..., xn are the elements of this iterable collection.

    Definition Classes
    TraversableProxyLikeTraversableOnce
    Exceptions thrown
    `UnsupportedOperationException`

    if this iterable collection is empty.

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

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

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

    Note: will not terminate for infinite-sized collections.

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

    B

    the result type of the binary operator.

    op

    the binary operator.

    returns

    an option value containing the result of reduceLeft(op) is this iterable collection is nonempty, None otherwise.

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
  88. def reduceOption[A1 >: A](op: (A1, A1) ⇒ A1): Option[A1]

    Reduces the elements of this iterable collection, if any, using the specified associative binary operator.

    Reduces the elements of this iterable collection, if any, using the specified associative binary operator.

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

    A1

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

    op

    A binary operator that must be associative.

    returns

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

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

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

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

    Note: will not terminate for infinite-sized collections.

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

    B

    the result type of the binary operator.

    op

    the binary operator.

    returns

    the result of inserting op between consecutive elements of this iterable collection, going right to left:

    op(x_1, op(x_2, ..., op(x_{n-1}, x_n)...))

    where x1, ..., xn are the elements of this iterable collection.

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
    Exceptions thrown
    `UnsupportedOperationException`

    if this iterable collection is empty.

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

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

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

    Note: will not terminate for infinite-sized collections.

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

    B

    the result type of the binary operator.

    op

    the binary operator.

    returns

    an option value containing the result of reduceRight(op) is this iterable collection is nonempty, None otherwise.

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
  91. def repr: Repr

    The collection of type iterable collection underlying this TraversableLike object.

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

    Definition Classes
    TraversableLikeGenTraversableLike
  92. def reversed: List[A]

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

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

    [use case]

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

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

    Note: will not terminate for infinite-sized collections.

    that

    the collection to compare with.

    returns

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

    Definition Classes
    IterableProxyLikeIterableLikeGenIterableLike
    Full Signature

    def sameElements[B >: A](that: GenIterable[B]): Boolean

  94. def scan[B >: A, That](z: B)(op: (B, B) ⇒ B)(implicit cbf: CanBuildFrom[Repr, 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 iterable collection containing the prefix scan of the elements in this iterable collection

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

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

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

    Note: will not terminate for infinite-sized collections.

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

    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
    TraversableProxyLikeTraversableLikeGenTraversableLike
  96. def scanRight[B, That](z: B)(op: (A, B) ⇒ B)(implicit bf: CanBuildFrom[Repr, B, That]): That

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

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

    Note: will not terminate for infinite-sized collections.

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

    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
    TraversableProxyLikeTraversableLikeGenTraversableLike
  97. def size: Int

    The size of this iterable collection.

    The size of this iterable collection.

    Note: will not terminate for infinite-sized collections.

    returns

    the number of elements in this iterable collection.

    Definition Classes
    TraversableProxyLikeGenTraversableLikeTraversableOnceGenTraversableOnce
  98. def slice(from: Int, until: Int): Repr

    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.

    returns

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

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLike
  99. def sliding(size: Int, step: Int): Iterator[Repr]

    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

    step

    the distance between the first elements of successive groups (defaults to 1)

    returns

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

    Definition Classes
    IterableProxyLikeIterableLike
    See also

    scala.collection.Iterator, method sliding

  100. def sliding(size: Int): Iterator[Repr]

    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 iterable collections of size size, except the last and the only element will be truncated if there are fewer elements than size.

    Definition Classes
    IterableProxyLikeIterableLike
    See also

    scala.collection.Iterator, method sliding

  101. def span(p: (A) ⇒ Boolean): (Repr, Repr)

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

    Splits this iterable 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.

    returns

    a pair consisting of the longest prefix of this iterable collection whose elements all satisfy p, and the rest of this iterable collection.

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLike
  102. def splitAt(n: Int): (Repr, Repr)

    Splits this iterable collection into two at a given position.

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

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLike
  103. 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 iterable collection. By default the string prefix is the simple name of the collection class iterable collection.

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLike
  104. def sum: A

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

    [use case]

    Sums up the elements of this collection.

    returns

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

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
    Full Signature

    def sum[B >: A](implicit num: Numeric[B]): B

  105. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef
  106. def tail: Repr

    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 iterable collection consisting of all elements of this iterable collection except the first one.

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLike
    Exceptions thrown
    `UnsupportedOperationException`

    if the iterable collection is empty.

  107. def tails: Iterator[Repr]

    Iterates over the tails of this iterable collection.

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

    returns

    an iterator over all the tails of this iterable collection

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

  108. def take(n: Int): Repr

    Selects first n elements.

    Selects first n elements.

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

    n

    the number of elements to take from this iterable collection.

    returns

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

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLike
  109. def takeRight(n: Int): Repr

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

    Definition Classes
    IterableProxyLikeIterableLike
  110. def takeWhile(p: (A) ⇒ Boolean): Repr

    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.

    returns

    the longest prefix of this iterable collection whose elements all satisfy the predicate p.

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableLike
  111. def thisCollection: Iterable[A]

    The underlying collection seen as an instance of Iterable.

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

    Attributes
    protected[this]
    Definition Classes
    IterableLikeTraversableLike
  112. def to[Col[_]]: Col[A]

    [use case] Converts this iterable collection into another by copying all elements.

    [use case]

    Converts this iterable collection into another by copying all elements.

    Note: will not terminate for infinite-sized collections.

    Col

    The collection type to build.

    returns

    a new collection containing all elements of this iterable collection.

    Definition Classes
    TraversableLikeTraversableOnceGenTraversableOnce
    Full Signature

    def to[Col[_]](implicit cbf: CanBuildFrom[Nothing, A, Col[A]]): Col[A]

  113. def toArray: Array[A]

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

    [use case]

    Converts this iterable collection to an array.

    Note: will not terminate for infinite-sized collections.

    returns

    an array containing all elements of this iterable collection. An ClassTag must be available for the element type of this iterable collection.

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
    Full Signature

    def toArray[B >: A](implicit arg0: ClassTag[B]): Array[B]

  114. def toBuffer[B >: A]: Buffer[B]

    Converts this iterable collection to a mutable buffer.

    Converts this iterable collection to a mutable buffer.

    Note: will not terminate for infinite-sized collections.

    returns

    a buffer containing all elements of this iterable collection.

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
  115. def toCollection(repr: Repr): Iterable[A]

    A conversion from collections of type Repr to Iterable objects.

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

    Attributes
    protected[this]
    Definition Classes
    IterableLikeTraversableLike
  116. def toIndexedSeq: immutable.IndexedSeq[A]

    Converts this iterable collection to an indexed sequence.

    Converts this iterable collection to an indexed sequence.

    Note: will not terminate for infinite-sized collections.

    returns

    an indexed sequence containing all elements of this iterable collection.

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
  117. def toIterable: Iterable[A]

    Converts this iterable collection to an iterable collection.

    Converts this iterable 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).

    Note: will not terminate for infinite-sized collections.

    returns

    an Iterable containing all elements of this iterable collection.

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
  118. def toIterator: Iterator[A]

    Returns an Iterator over the elements in this iterable collection.

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

    Note: will not terminate for infinite-sized collections.

    returns

    an Iterator containing all elements of this iterable collection.

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableOnce
  119. def toList: List[A]

    Converts this iterable collection to a list.

    Converts this iterable collection to a list.

    Note: will not terminate for infinite-sized collections.

    returns

    a list containing all elements of this iterable collection.

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
  120. def toMap[T, U]: Map[T, U]

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

    [use case]

    Converts this iterable 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.

    Note: will not terminate for infinite-sized collections.

    returns

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

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
    Full Signature

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

  121. def toParArray: ParArray[A]

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to TraversableOps[A] performed by method traversable2ops in scala.collection.parallel.
    Definition Classes
    TraversableOps
  122. def toSeq: Seq[A]

    Converts this iterable collection to a sequence.

    Converts this iterable collection to a sequence. As with toIterable, it's lazy in this default implementation, as this TraversableOnce may be lazy and unevaluated.

    Note: will not terminate for infinite-sized collections.

    returns

    a sequence containing all elements of this iterable collection.

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
  123. def toSet[B >: A]: immutable.Set[B]

    Converts this iterable collection to a set.

    Converts this iterable collection to a set.

    Note: will not terminate for infinite-sized collections.

    returns

    a set containing all elements of this iterable collection.

    Definition Classes
    TraversableProxyLikeTraversableOnceGenTraversableOnce
  124. def toStream: Stream[A]

    Converts this iterable collection to a stream.

    Converts this iterable collection to a stream.

    Note: will not terminate for infinite-sized collections.

    returns

    a stream containing all elements of this iterable collection.

    Definition Classes
    TraversableProxyLikeTraversableLikeGenTraversableOnce
  125. def toString(): String

    Returns a string representation of the object.

    Returns a string representation of the object.

    The default representation is platform dependent.

    returns

    a string representation of the object.

    Definition Classes
    ProxyAny
  126. def toTraversable: Traversable[A]

    Converts this iterable collection to an unspecified Traversable.

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

    Note: will not terminate for infinite-sized collections.

    returns

    a Traversable containing all elements of this iterable collection.

    Definition Classes
    TraversableProxyLikeTraversableLikeTraversableOnceGenTraversableOnce
  127. def toVector: Vector[A]

    Converts this iterable collection to a Vector.

    Converts this iterable collection to a Vector.

    Note: will not terminate for infinite-sized collections.

    returns

    a vector containing all elements of this iterable collection.

    Definition Classes
    TraversableOnceGenTraversableOnce
  128. def view(from: Int, until: Int): IterableView[A, Repr]

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

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

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

    Definition Classes
    IterableProxyLikeTraversableProxyLikeIterableLikeTraversableLike
  129. def view: IterableView[A, Repr]

    Creates a non-strict view of this iterable collection.

    Creates a non-strict view of this iterable collection.

    returns

    a non-strict view of this iterable collection.

    Definition Classes
    IterableProxyLikeTraversableProxyLikeIterableLikeTraversableLike
  130. final def wait(): Unit

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

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

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  133. def withFilter(p: (A) ⇒ Boolean): FilterMonadic[A, Repr]

    Creates a non-strict filter of this iterable collection.

    Creates a non-strict filter of this iterable 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 iterable collection which satisfy the predicate p.

    Definition Classes
    TraversableLikeFilterMonadic
  134. def zip[B](that: GenIterable[B]): Iterable[(A, B)]

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

    [use case]

    Returns a iterable collection formed from this iterable 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.

    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 iterable collection containing pairs consisting of corresponding elements of this iterable collection and that. The length of the returned collection is the minimum of the lengths of this iterable collection and that.

    Definition Classes
    IterableProxyLikeIterableLikeGenIterableLike
    Full Signature

    def zip[A1 >: A, B, That](that: GenIterable[B])(implicit bf: CanBuildFrom[Repr, (A1, B), That]): That

  135. def zipAll[B](that: Iterable[B], thisElem: A, thatElem: B): Iterable[(A, B)]

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

    [use case]

    Returns a iterable collection formed from this iterable 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.

    B

    the type of the second half of the returned pairs

    that

    The iterable providing the second half of each result pair

    thisElem

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

    thatElem

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

    returns

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

    Definition Classes
    IterableProxyLikeIterableLikeGenIterableLike
    Full Signature

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

  136. def zipWithIndex: Iterable[(A, Int)]

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

    [use case]

    Zips this iterable collection with its indices.

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

    returns

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

    Definition Classes
    IterableProxyLikeIterableLikeGenIterableLike
    Full Signature

    def zipWithIndex[A1 >: A, That](implicit bf: CanBuildFrom[Repr, (A1, Int), That]): That

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

  137. def [B](y: B): (IterableProxyLike[A, Repr], B)

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to ArrowAssoc[IterableProxyLike[A, Repr]] performed by method any2ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Shadowed Implicit Value Members

  1. def filter(p: (A) ⇒ Boolean): TraversableOnce[A]

    Implicit information
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    Definition Classes
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  2. def flatMap[B](f: (A) ⇒ GenTraversableOnce[B]): TraversableOnce[B]

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to MonadOps[A] performed by method MonadOps in scala.collection.TraversableOnce.
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    Definition Classes
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  3. def map[B](f: (A) ⇒ B): TraversableOnce[B]

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to MonadOps[A] performed by method MonadOps in scala.collection.TraversableOnce.
    Shadowing
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  4. val self: Any

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to StringAdd performed by method any2stringadd in scala.Predef.
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    This implicitly inherited member is shadowed by one or more members in this class.
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  5. val self: Any

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to StringFormat performed by method any2stringfmt in scala.Predef.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
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  6. def withFilter(p: (A) ⇒ Boolean): Iterator[A]

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to MonadOps[A] performed by method MonadOps in scala.collection.TraversableOnce.
    Shadowing
    This implicitly inherited member is shadowed by one or more members in this class.
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    Definition Classes
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Deprecated Value Members

  1. def /:\[A1 >: A](z: A1)(op: (A1, A1) ⇒ A1): A1

    A syntactic sugar for out of order folding.

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

    Example:

    scala> val a = LinkedList(1,2,3,4)
    a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)
    
    scala> val b = (a /:\ 5)(_+_)
    b: Int = 15
    Definition Classes
    GenTraversableOnce
    Annotations
    @deprecated
    Deprecated

    (Since version 2.10.0) use fold instead

  2. def x: IterableProxyLike[A, Repr]

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to ArrowAssoc[IterableProxyLike[A, Repr]] performed by method any2ArrowAssoc in scala.Predef.
    Shadowing
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  3. def x: IterableProxyLike[A, Repr]

    Implicit information
    This member is added by an implicit conversion from IterableProxyLike[A, Repr] to Ensuring[IterableProxyLike[A, Repr]] performed by method any2Ensuring in scala.Predef.
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Inherited from TraversableProxyLike[A, Repr]

Inherited from Proxy

Inherited from IterableLike[A, Repr]

Inherited from GenIterableLike[A, Repr]

Inherited from TraversableLike[A, Repr]

Inherited from GenTraversableLike[A, Repr]

Inherited from Parallelizable[A, ParIterable[A]]

Inherited from TraversableOnce[A]

Inherited from GenTraversableOnce[A]

Inherited from FilterMonadic[A, Repr]

Inherited from HasNewBuilder[A, Repr]

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Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion traversable2ops from IterableProxyLike[A, Repr] to TraversableOps[A]

Inherited by implicit conversion MonadOps from IterableProxyLike[A, Repr] to MonadOps[A]

Inherited by implicit conversion any2stringadd from IterableProxyLike[A, Repr] to StringAdd

Inherited by implicit conversion any2stringfmt from IterableProxyLike[A, Repr] to StringFormat

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Inherited by implicit conversion alternateImplicit from IterableProxyLike[A, Repr] to ForceImplicitAmbiguity

Ungrouped