Scala Standard Library2.12.20 < Back
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# Packages

-  package root

  This is the documentation for the Scala standard library.

  This is the documentation for the Scala standard library.

  #### Package structure

  The scala package contains core types like `Int`, `Float`, `Array` or `Option` which are accessible in all Scala compilation units without explicit qualification or imports.

  Notable packages include:

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

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

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

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

  #### Automatic imports

  Identifiers in the scala package and the `scala.Predef` object are always in scope by default.

  Some of these identifiers are type aliases provided as shortcuts to commonly used classes. For example, `List` is an alias for `scala.collection.immutable.List`.

  Other aliases refer to classes provided by the underlying platform. For example, on the JVM, `String` is an alias for `java.lang.String`.

  Definition Classes
    root
-  package scala

  Core Scala types.

  Core Scala types. They are always available without an explicit import.

  Definition Classes
    root
-  package annotation
  Definition Classes
    scala
-  package beans
  Definition Classes
    scala
-  package collection

  Contains the base traits and objects needed to use and extend Scala's collection library.

  Contains the base traits and objects needed to use and extend Scala's collection library.

  #### Guide

  A detailed guide for using the collections library is available at http://docs.scala-lang.org/overviews/collections/introduction.html. Developers looking to extend the collections library can find a description of its architecture at http://docs.scala-lang.org/overviews/core/architecture-of-scala-collections.html.

  #### Using Collections

  It is convenient to treat all collections as either a scala.collection.Traversable or scala.collection.Iterable, as these traits define the vast majority of operations on a collection.

  Collections can, of course, be treated as specifically as needed, and the library is designed to ensure that the methods that transform collections will return a collection of the same type:

      scala> val array = Array(1,2,3,4,5,6)
      array: Array[Int] = Array(1, 2, 3, 4, 5, 6)

      scala> array map { _.toString }
      res0: Array[String] = Array(1, 2, 3, 4, 5, 6)

      scala> val list = List(1,2,3,4,5,6)
      list: List[Int] = List(1, 2, 3, 4, 5, 6)

      scala> list map { _.toString }
      res1: List[String] = List(1, 2, 3, 4, 5, 6)

  #### Creating Collections

  The most common way to create a collection is to use its companion object as a factory. The three most commonly used collections are scala.collection.Seq, scala.collection.immutable.Set, and scala.collection.immutable.Map. They can be used directly as shown below since their companion objects are all available as type aliases in either the scala package or in `scala.Predef`. New collections are created like this:

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

      scala> val set = Set(1,2,3,4,1)
      set: scala.collection.immutable.Set[Int] = Set(1, 2, 3, 4)

      scala> val map = Map(1 -> "one", 2 -> "two", 3 -> "three", 2 -> "too")
      map: scala.collection.immutable.Map[Int,String] = Map(1 -> one, 2 -> too, 3 -> three)

  It is also typical to prefer the scala.collection.immutable collections over those in scala.collection.mutable; the types aliased in the `scala.Predef` object are the immutable versions.

  Also note that the collections library was carefully designed to include several implementations of each of the three basic collection types. These implementations have specific performance characteristics which are described in the guide.

  The concrete parallel collections also have specific performance characteristics which are described in the parallel collections guide

  ##### Converting to and from Java Collections

  The scala.collection.JavaConverters object provides a collection of decorators that allow converting between Scala and Java collections using `asScala` and `asJava` methods.

  Definition Classes
    scala
-  package compat
  Definition Classes
    scala
-  package concurrent

  This package object contains primitives for concurrent and parallel programming.

  This package object contains primitives for concurrent and parallel programming.

  #### Guide

  A more detailed guide to Futures and Promises, including discussion and examples can be found at http://docs.scala-lang.org/overviews/core/futures.html.

  #### Common Imports

  When working with Futures, you will often find that importing the whole concurrent package is convenient:

      import scala.concurrent._

  When using things like `Future`s, it is often required to have an implicit `ExecutionContext` in scope. The general advice for these implicits are as follows.

  If the code in question is a class or method definition, and no `ExecutionContext` is available, request one from the caller by adding an implicit parameter list:

      def myMethod(myParam: MyType)(implicit ec: ExecutionContext) = …
      //Or
      class MyClass(myParam: MyType)(implicit ec: ExecutionContext) { … }

  This allows the caller of the method, or creator of the instance of the class, to decide which `ExecutionContext` should be used.

  For typical REPL usage and experimentation, importing the global `ExecutionContext` is often desired.

      import scala.concurrent.ExcutionContext.Implicits.global

  #### Specifying Durations

  Operations often require a duration to be specified. A duration DSL is available to make defining these easier:

      import scala.concurrent.duration._
      val d: Duration = 10.seconds

  #### Using Futures For Non-blocking Computation

  Basic use of futures is easy with the factory method on Future, which executes a provided function asynchronously, handing you back a future result of that function without blocking the current thread. In order to create the Future you will need either an implicit or explicit ExecutionContext to be provided:

      import scala.concurrent._
      import ExecutionContext.Implicits.global  // implicit execution context

      val firstZebra: Future[Int] = Future {
        val source = scala.io.Source.fromFile("/etc/dictionaries-common/words")
        source.toSeq.indexOfSlice("zebra")
      }

  #### Avoid Blocking

  Although blocking is possible in order to await results (with a mandatory timeout duration):

      import scala.concurrent.duration._
      Await.result(firstZebra, 10.seconds)

  and although this is sometimes necessary to do, in particular for testing purposes, blocking in general is discouraged when working with Futures and concurrency in order to avoid potential deadlocks and improve performance. Instead, use callbacks or combinators to remain in the future domain:

      val animalRange: Future[Int] = for {
        aardvark <- firstAardvark
        zebra <- firstZebra
      } yield zebra - aardvark

      animalRange.onSuccess {
        case x if x > 500000 => println("It's a long way from Aardvark to Zebra")
      }

  Definition Classes
    scala
-  package io
  Definition Classes
    scala
-  package math

  The package object `scala.math` contains methods for performing basic numeric operations such as elementary exponential, logarithmic, root and trigonometric functions.

  The package object `scala.math` contains methods for performing basic numeric operations such as elementary exponential, logarithmic, root and trigonometric functions.

  All methods forward to java.lang.Math unless otherwise noted.

  Definition Classes
    scala
  See also

    java.lang.Math

-  package ref
  Definition Classes
    scala
-  package reflect
  Definition Classes
    scala
-  package runtime
  Definition Classes
    scala
-  package sys

  The package object `scala.sys` contains methods for reading and altering core aspects of the virtual machine as well as the world outside of it.

  The package object `scala.sys` contains methods for reading and altering core aspects of the virtual machine as well as the world outside of it.

  Definition Classes
    scala
  Since

    2.9

-  package text
  Definition Classes
    scala
-  package util
  Definition Classes
    scala
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c

scala

# Some 

###

#### final case class Some[+A](value: A) extends Option[A] with Product with Serializable

Class `Some[A]` represents existing values of type `A`.

Annotations
  @SerialVersionUID()
Source
  Option.scala
Since

  1.0

Linear Supertypes
Option[A], Serializable, java.io.Serializable, Product, Equals, AnyRef, Any
 
Ordering

1. Alphabetic
2. By Inheritance

Inherited

1. Some
2. Option
3. Serializable
4. Serializable
5. Product
6. Equals
7. AnyRef
8. Any

Implicitly

1. by option2Iterable
2. by any2stringadd
3. by StringFormat
4. by Ensuring
5. by ArrowAssoc

1. Hide All
2. Show All

Visibility

1. Public
2. All

### Instance Constructors

1.  new Some(value: A)

### Type Members

1.  class WithFilter extends AnyRef

   We need a whole WithFilter class to honor the "doesn't create a new collection" contract even though it seems unlikely to matter much in a collection with max size 1.

   We need a whole WithFilter class to honor the "doesn't create a new collection" contract even though it seems unlikely to matter much in a collection with max size 1.

   Definition Classes
     Option

### Value Members

1.  final def !=(arg0: Any): Boolean

   Test two objects for inequality.

   Test two objects for inequality.

   returns

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

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

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

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

   returns

     a hash value consistent with ==

   Definition Classes
     AnyRef → Any
3.  def +(other: String): String
   Implicit
     This member is added by an implicit conversion from Some[A] to any2stringadd[Some[A]] performed by method any2stringadd in scala.Predef.
   Definition Classes
     any2stringadd
4.  def ++[B >: A, That](that: GenTraversableOnce[B])(implicit bf: CanBuildFrom[collection.Iterable[A], B, That]): That

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

   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.

   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 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`.

   Implicit
     This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
   Definition Classes
     TraversableLike → GenTraversableLike
5.  def ++:[B >: A, That](that: collection.Traversable[B])(implicit bf: CanBuildFrom[collection.Iterable[A], 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 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`.

   Implicit
     This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
   Definition Classes
     TraversableLike
6.  def ++:[B](that: collection.TraversableOnce[B]): Option[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 option which contains all elements of this option followed by all elements of `that`.

   Implicit
     This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
   Definition Classes
     TraversableLike
    Full Signature

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

7.  def ->[B](y: B): (Some[A], B)
   Implicit
     This member is added by an implicit conversion from Some[A] to ArrowAssoc[Some[A]] performed by method ArrowAssoc in scala.Predef.
   Definition Classes
     ArrowAssoc
   Annotations
     @inline()
8.  final def ==(arg0: Any): Boolean

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

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

   returns

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

   Definition Classes
     AnyRef → Any
9.  def addString(b: StringBuilder): 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 = List(1,2,3,4)
       a: List[Int] = List(1, 2, 3, 4)

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

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

   b

     the string builder to which elements are appended.

   returns

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

   Implicit
     This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
   Definition Classes
     TraversableOnce
10.  def addString(b: StringBuilder, sep: String): 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 = List(1,2,3,4)
        a: List[Int] = List(1, 2, 3, 4)

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

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

    b

      the string builder to which elements are appended.

    sep

      the separator string.

    returns

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

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce
11.  def addString(b: StringBuilder, start: String, sep: String, end: String): 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 = List(1,2,3,4)
        a: List[Int] = List(1, 2, 3, 4)

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

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

    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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce
12.  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 is similar to `foldLeft` in that it doesn't require the result to be a supertype of the element type. In addition, it allows parallel collections to be processed in chunks, and then combines the intermediate results.

    `aggregate` splits the iterable collection into partitions and processes each partition by sequentially applying `seqop`, starting with `z` (like `foldLeft`). Those intermediate results are then combined by using `combop` (like `fold`). The implementation of this operation may operate on an arbitrary number of collection partitions (even 1), so `combop` may be invoked an arbitrary number of times (even 0).

    As an example, consider summing up the integer values of a list of chars. The initial value for the sum is 0. First, `seqop` transforms each input character to an Int and adds it to the sum (of the partition). Then, `combop` just needs to sum up the intermediate results of the partitions:

        List('a', 'b', 'c').aggregate(0)({ (sum, ch) => sum + ch.toInt }, { (p1, p2) => p1 + p2 })

    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) and may be evaluated more than once

    seqop

      an operator used to accumulate results within a partition

    combop

      an associative operator used to combine results from different partitions

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce → GenTraversableOnce
13.  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`.

14.  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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      IterableLike → Equals
15.  def clone(): AnyRef

    Create a copy of the receiver object.

    Create a copy of the receiver object.

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

    returns

      a copy of the receiver object.

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

      not specified by SLS as a member of AnyRef

16.  final def collect[B](pf: PartialFunction[A, B]): Option[B]

    Returns a scala.Some containing the result of applying `pf` to this scala.Option's contained value, if this option is nonempty and `pf` is defined for that value.

    Returns a scala.Some containing the result of applying `pf` to this scala.Option's contained value, if this option is nonempty and `pf` is defined for that value. Returns `None` otherwise.

    pf

      the partial function.

    returns

      the result of applying `pf` to this scala.Option's value (if possible), or `None`.

    Definition Classes
      Option
    Annotations
      @inline()
    Example:

    1.     // Returns Some(HTTP) because the partial function covers the case.
           Some("http") collect {case "http" => "HTTP"}

           // Returns None because the partial function doesn't cover the case.
           Some("ftp") collect {case "http" => "HTTP"}

           // Returns None because the option is empty. There is no value to pass to the partial function.
           None collect {case value => value}

17.  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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce
    Example:

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

18.  def companion: GenericCompanion[collection.Iterable]

    The factory companion object that builds instances of class Iterable.

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

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      Iterable → GenIterable → Traversable → GenTraversable → GenericTraversableTemplate
19.  final def contains[A1 >: A](elem: A1): Boolean

    Tests whether the option contains a given value as an element.

    Tests whether the option contains a given value as an element.

    This is equivalent to:

        option match {
          case Some(x) => x == elem
          case None    => false
        }

    elem

      the element to test.

    returns

      `true` if the option has an element that is equal (as determined by `==`) to `elem`, `false` otherwise.

    Definition Classes
      Option
    Example:

    1.     // Returns true because Some instance contains string "something" which equals "something".
           Some("something") contains "something"

           // Returns false because "something" != "anything".
           Some("something") contains "anything"

           // Returns false when method called on None.
           None contains "anything"

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

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

    [use case]

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

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce
     Full Signature

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

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

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

    [use case]

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

    xs

      the array to fill.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce → GenTraversableOnce
     Full Signature

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

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

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

    [use case]

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

    xs

      the array to fill.

    start

      the starting index.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce → GenTraversableOnce
     Full Signature

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

23.  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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce
24.  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`.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce → GenTraversableOnce
25.  def drop(n: Int): collection.Iterable[A]

    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. If `n` is negative, don't drop any elements.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      IterableLike → TraversableLike → GenTraversableLike
26.  def dropRight(n: Int): collection.Iterable[A]

    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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      IterableLike
27.  def dropWhile(p: (A) ⇒ Boolean): collection.Iterable[A]

    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`.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableLike → GenTraversableLike
28.  def ensuring(cond: (Some[A]) ⇒ Boolean, msg: ⇒ Any): Some[A]
    Implicit
      This member is added by an implicit conversion from Some[A] to Ensuring[Some[A]] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
29.  def ensuring(cond: (Some[A]) ⇒ Boolean): Some[A]
    Implicit
      This member is added by an implicit conversion from Some[A] to Ensuring[Some[A]] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
30.  def ensuring(cond: Boolean, msg: ⇒ Any): Some[A]
    Implicit
      This member is added by an implicit conversion from Some[A] to Ensuring[Some[A]] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
31.  def ensuring(cond: Boolean): Some[A]
    Implicit
      This member is added by an implicit conversion from Some[A] to Ensuring[Some[A]] performed by method Ensuring in scala.Predef.
    Definition Classes
      Ensuring
32.  final def eq(arg0: AnyRef): Boolean

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

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

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

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

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

    returns

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

    Definition Classes
      AnyRef
33.  final def exists(p: (A) ⇒ Boolean): Boolean

    Returns true if this option is nonempty and the predicate `p` returns true when applied to this scala.Option's value.

    Returns true if this option is nonempty and the predicate `p` returns true when applied to this scala.Option's value. Otherwise, returns false.

    This is equivalent to:

        option match {
          case Some(x) => p(x)
          case None    => false
        }

    p

      the predicate to test

    Definition Classes
      Option
    Annotations
      @inline()
34.  final def filter(p: (A) ⇒ Boolean): Option[A]

    Returns this scala.Option if it is nonempty and applying the predicate `p` to this scala.Option's value returns true.

    Returns this scala.Option if it is nonempty and applying the predicate `p` to this scala.Option's value returns true. Otherwise, return `None`.

    This is equivalent to:

        option match {
          case Some(x) if p(x) => Some(x)
          case _               => None
        }

    p

      the predicate used for testing.

    Definition Classes
      Option
    Annotations
      @inline()
35.  final def filterNot(p: (A) ⇒ Boolean): Option[A]

    Returns this scala.Option if it is nonempty and applying the predicate `p` to this scala.Option's value returns false.

    Returns this scala.Option if it is nonempty and applying the predicate `p` to this scala.Option's value returns false. Otherwise, return `None`.

    This is equivalent to:

        option match {
          case Some(x) if !p(x) => Some(x)
          case _                => None
        }

    p

      the predicate used for testing.

    Definition Classes
      Option
    Annotations
      @inline()
36.  def finalize(): Unit

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

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

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

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

      not specified by SLS as a member of AnyRef

37.  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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce
38.  final def flatMap[B](f: (A) ⇒ Option[B]): Option[B]

    Returns the result of applying `f` to this scala.Option's value if this scala.Option is nonempty.

    Returns the result of applying `f` to this scala.Option's value if this scala.Option is nonempty. Returns `None` if this scala.Option is empty. Slightly different from `map` in that `f` is expected to return an scala.Option (which could be `None`).

    This is equivalent to:

        option match {
          case Some(x) => f(x)
          case None    => None
        }

    f

      the function to apply

    Definition Classes
      Option
    Annotations
      @inline()
    See also

      map

      foreach

39.  def flatten[B](implicit ev: <:<[A, Option[B]]): Option[B]
    Definition Classes
      Option
40.  final def fold[B](ifEmpty: ⇒ B)(f: (A) ⇒ B): B

    Returns the result of applying `f` to this scala.Option's value if the scala.Option is nonempty.

    Returns the result of applying `f` to this scala.Option's value if the scala.Option is nonempty. Otherwise, evaluates expression `ifEmpty`.

    This is equivalent to:

        option match {
          case Some(x) => f(x)
          case None    => ifEmpty
        }

    This is also equivalent to:

        option map f getOrElse ifEmpty

    ifEmpty

      the expression to evaluate if empty.

    f

      the function to apply if nonempty.

    Definition Classes
      Option
    Annotations
      @inline()
41.  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. Returns `z` if this iterable collection is empty.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce → GenTraversableOnce
42.  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. Returns `z` if this iterable collection is empty.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      IterableLike → TraversableOnce → GenTraversableOnce
43.  final def forall(p: (A) ⇒ Boolean): Boolean

    Returns true if this option is empty or the predicate `p` returns true when applied to this scala.Option's value.

    Returns true if this option is empty or the predicate `p` returns true when applied to this scala.Option's value.

    This is equivalent to:

        option match {
          case Some(x) => p(x)
          case None    => true
        }

    p

      the predicate to test

    Definition Classes
      Option
    Annotations
      @inline()
44.  final def foreach[U](f: (A) ⇒ U): Unit

    Apply the given procedure `f` to the option's value, if it is nonempty.

    Apply the given procedure `f` to the option's value, if it is nonempty. Otherwise, do nothing.

    This is equivalent to:

        option match {
          case Some(x) => f(x)
          case None    => ()
        }

    f

      the procedure to apply.

    Definition Classes
      Option
    Annotations
      @inline()
    See also

      map

      flatMap

45.  def genericBuilder[B]: Builder[B, collection.Iterable[B]]

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

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

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      GenericTraversableTemplate
46.  def get: A

    Returns the option's value.

    Returns the option's value.

    This is equivalent to:

        option match {
          case Some(x) => x
          case None    => throw new Exception
        }

    Definition Classes
      Some → Option
    Exceptions thrown

      `java.util.NoSuchElementException` if the option is empty.

    Note

      The option must be nonempty.

47.  final def getClass(): Class[_]

    Returns the runtime class representation of the object.

    Returns the runtime class representation of the object.

    returns

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

    Definition Classes
      AnyRef → Any
    Annotations
      @native()
48.  final def getOrElse[B >: A](default: ⇒ B): B

    Returns the option's value if the option is nonempty, otherwise return the result of evaluating `default`.

    Returns the option's value if the option is nonempty, otherwise return the result of evaluating `default`.

    This is equivalent to:

        option match {
          case Some(x) => x
          case None    => default
        }

    default

      the default expression.

    Definition Classes
      Option
    Annotations
      @inline()
49.  def groupBy[K](f: (A) ⇒ K): Map[K, collection.Iterable[A]]

    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 groupBy 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`.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableLike → GenTraversableLike
50.  def grouped(size: Int): collection.Iterator[collection.Iterable[A]]

    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 less than size `size` if the elements don't divide evenly.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      IterableLike
    See also

      scala.collection.Iterator, method `grouped`

51.  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. Non-empty Iterators usually return `false` even if they were created from a collection with a known finite size.

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

    returns

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

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableLike → TraversableOnce → GenTraversableOnce
52.  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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      IterableLike → TraversableLike → GenTraversableLike
    Exceptions thrown

      `NoSuchElementException` if the iterable collection is empty.

53.  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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableLike → GenTraversableLike
54.  def init: collection.Iterable[A]

    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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableLike → GenTraversableLike
    Exceptions thrown

      `UnsupportedOperationException` if the iterable collection is empty.

55.  def inits: collection.Iterator[collection.Iterable[A]]

    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

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableLike
    Example:

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

56.  def isDefined: Boolean

    Returns true if the option is an instance of scala.Some, false otherwise.

    Returns true if the option is an instance of scala.Some, false otherwise.

    This is equivalent to:

        option match {
          case Some(_) => true
          case None    => false
        }

    Definition Classes
      Option
57.  def isEmpty: Boolean

    Returns true if the option is `None`, false otherwise.

    Returns true if the option is `None`, false otherwise.

    This is equivalent to:

        option match {
          case Some(_) => false
          case None    => true
        }

    Definition Classes
      Some → Option
58.  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
59.  final def isTraversableAgain: Boolean

    Tests whether this iterable collection can be repeatedly traversed.

    Tests whether this iterable collection can be repeatedly traversed.

    returns

      `true`

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableLike → GenTraversableLike → GenTraversableOnce
60.  def iterator: Iterator[A]

    Returns a singleton iterator returning the scala.Option's value if it is nonempty, or an empty iterator if the option is empty.

    Returns a singleton iterator returning the scala.Option's value if it is nonempty, or an empty iterator if the option is empty.

    Definition Classes
      Option
61.  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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableLike → GenTraversableLike
    Exceptions thrown

      `NoSuchElementException` If the iterable collection is empty.

62.  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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableLike → GenTraversableLike
63.  final def map[B](f: (A) ⇒ B): Option[B]

    Returns a scala.Some containing the result of applying `f` to this scala.Option's value if this scala.Option is nonempty.

    Returns a scala.Some containing the result of applying `f` to this scala.Option's value if this scala.Option is nonempty. Otherwise return `None`.

    This is equivalent to:

        option match {
          case Some(x) => Some(f(x))
          case None    => None
        }

    f

      the function to apply

    Definition Classes
      Option
    Annotations
      @inline()
    Note

      This is similar to `flatMap` except here, `f` does not need to wrap its result in an scala.Option.

    See also

      flatMap

      foreach

64.  def max: A

    [use case] Finds the largest element.

    [use case]

    Finds the largest element.

    returns

      the largest element of this option.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce → GenTraversableOnce
     Full Signature

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

    Exceptions thrown

      `UnsupportedOperationException` if this option is empty.

65.  def maxBy[B](f: (A) ⇒ B): A

    [use case] Finds the first element which yields the largest value measured by function f.

    [use case]

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

    B

      The result type of the function f.

    f

      The measuring function.

    returns

      the first element of this option with the largest value measured by function f.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce → GenTraversableOnce
     Full Signature

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

    Exceptions thrown

      `UnsupportedOperationException` if this option is empty.

66.  def min: A

    [use case] Finds the smallest element.

    [use case]

    Finds the smallest element.

    returns

      the smallest element of this option

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce → GenTraversableOnce
     Full Signature

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

    Exceptions thrown

      `UnsupportedOperationException` if this option is empty.

67.  def minBy[B](f: (A) ⇒ B): A

    [use case] Finds the first element which yields the smallest value measured by function f.

    [use case]

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

    B

      The result type of the function f.

    f

      The measuring function.

    returns

      the first element of this option with the smallest value measured by function f.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce → GenTraversableOnce
     Full Signature

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

    Exceptions thrown

      `UnsupportedOperationException` if this option is empty.

68.  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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce → GenTraversableOnce
69.  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`.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce → GenTraversableOnce
    Example:

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

70.  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`.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce → GenTraversableOnce
    Example:

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

71.  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
72.  final def nonEmpty: Boolean

    Returns false if the option is `None`, true otherwise.

    Returns false if the option is `None`, true otherwise.

    This is equivalent to:

        option match {
          case Some(_) => true
          case None    => false
        }

    Definition Classes
      Option
    Note

      Implemented here to avoid the implicit conversion to Iterable.

73.  final def notify(): Unit

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

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

    Definition Classes
      AnyRef
    Annotations
      @native()
    Note

      not specified by SLS as a member of AnyRef

74.  final def notifyAll(): Unit

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

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

    Definition Classes
      AnyRef
    Annotations
      @native()
    Note

      not specified by SLS as a member of AnyRef

75.  final def orElse[B >: A](alternative: ⇒ Option[B]): Option[B]

    Returns this scala.Option if it is nonempty, otherwise return the result of evaluating `alternative`.

    Returns this scala.Option if it is nonempty, otherwise return the result of evaluating `alternative`.

    This is equivalent to:

        option match {
          case Some(x) => Some(x)
          case None    => alternative
        }

    alternative

      the alternative expression.

    Definition Classes
      Option
    Annotations
      @inline()
76.  final def orNull[A1 >: A](implicit ev: <:<[Null, A1]): A1

    Returns the option's value if it is nonempty, or `null` if it is empty.

    Returns the option's value if it is nonempty, or `null` if it is empty.

    Although the use of null is discouraged, code written to use scala.Option must often interface with code that expects and returns nulls.

    This is equivalent to:

        option match {
          case Some(x) => x
          case None    => null
        }

    Definition Classes
      Option
    Annotations
      @inline()
    Example:

    1.     val initialText: Option[String] = getInitialText
           val textField = new JComponent(initialText.orNull,20)

77.  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

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      Parallelizable
78.  def partition(p: (A) ⇒ Boolean): (collection.Iterable[A], collection.Iterable[A])

    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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableLike → GenTraversableLike
79.  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 option 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 option and as result type of `product`. Examples of such types are: `Long`, `Float`, `Double`, `BigInt`.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce → GenTraversableOnce
     Full Signature

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

80.  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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce → GenTraversableOnce
    Exceptions thrown

      `UnsupportedOperationException` if this iterable collection is empty.

81.  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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce
    Exceptions thrown

      `UnsupportedOperationException` if this iterable collection is empty.

82.  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)` if this iterable collection is nonempty, `None` otherwise.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce → GenTraversableOnce
83.  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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce → GenTraversableOnce
84.  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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      IterableLike → TraversableOnce → GenTraversableOnce
    Exceptions thrown

      `UnsupportedOperationException` if this iterable collection is empty.

85.  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)` if this iterable collection is nonempty, `None` otherwise.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce → GenTraversableOnce
86.  def repr: collection.Iterable[A]

    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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableLike → GenTraversableLike
87.  def sameElements(that: GenIterable[A]): Boolean

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

    [use case]

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

    that

      the collection to compare with.

    returns

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

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      IterableLike → GenIterableLike
     Full Signature

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

88.  def scan[B >: A, That](z: B)(op: (B, B) ⇒ B)(implicit cbf: CanBuildFrom[collection.Iterable[A], 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

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableLike → GenTraversableLike
89.  def scanLeft[B, That](z: B)(op: (B, A) ⇒ B)(implicit bf: CanBuildFrom[collection.Iterable[A], 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 the new element type `B`.

    returns

      collection with intermediate results

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableLike → GenTraversableLike
90.  def scanRight[B, That](z: B)(op: (A, B) ⇒ B)(implicit bf: CanBuildFrom[collection.Iterable[A], 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 the new element type `B`.

    returns

      collection with intermediate results

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableLike → GenTraversableLike
    Annotations
      @migration
    Migration

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

91.  def seq: collection.Iterable[A]

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

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

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

    returns

      a sequential view of the collection.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      Iterable → GenIterable → Traversable → GenTraversable → Parallelizable → TraversableOnce → GenTraversableOnce
92.  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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce → GenTraversableOnce
93.  def slice(from: Int, until: Int): collection.Iterable[A]

    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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      IterableLike → TraversableLike → GenTraversableLike
94.  def sliding(size: Int, step: Int): collection.Iterator[collection.Iterable[A]]

    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

    returns

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

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      IterableLike
    See also

      scala.collection.Iterator, method `sliding`

95.  def sliding(size: Int): collection.Iterator[collection.Iterable[A]]

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

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

    size

      the number of elements per group

    returns

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

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      IterableLike
    See also

      scala.collection.Iterator, method `sliding`

96.  def span(p: (A) ⇒ Boolean): (collection.Iterable[A], collection.Iterable[A])

    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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableLike → GenTraversableLike
97.  def splitAt(n: Int): (collection.Iterable[A], collection.Iterable[A])

    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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableLike → GenTraversableLike
98.  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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableLike → GenTraversableLike
99.  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 option 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 option and as result type of `sum`. Examples of such types are: `Long`, `Float`, `Double`, `BigInt`.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Definition Classes
      TraversableOnce → GenTraversableOnce
     Full Signature

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

100.  final def synchronized[T0](arg0: ⇒ T0): T0
     Definition Classes
       AnyRef
101.  def tail: collection.Iterable[A]

     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.

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       TraversableLike → GenTraversableLike
     Exceptions thrown

       `java.lang.UnsupportedOperationException` if the iterable collection is empty.

102.  def tails: collection.Iterator[collection.Iterable[A]]

     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

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       TraversableLike
     Example:

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

103.  def take(n: Int): collection.Iterable[A]

     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. If `n` is negative, returns an empty iterable collection.

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       IterableLike → TraversableLike → GenTraversableLike
104.  def takeRight(n: Int): collection.Iterable[A]

     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.

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       IterableLike
105.  def takeWhile(p: (A) ⇒ Boolean): collection.Iterable[A]

     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`.

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       IterableLike → TraversableLike → GenTraversableLike
106.  def to[Col[_]]: Col[A]

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

     [use case]

     Converts this option into another by copying all elements.

     Col

       The collection type to build.

     returns

       a new collection containing all elements of this option.

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       TraversableLike → TraversableOnce → GenTraversableOnce
      Full Signature

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

107.  def toArray: Array[A]

     [use case] Converts this option to an array.

     [use case]

     Converts this option to an array.

     returns

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

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       TraversableOnce → GenTraversableOnce
      Full Signature

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

108.  def toBuffer[B >: A]: Buffer[B]

     Uses the contents of this iterable collection to create a new mutable buffer.

     Uses the contents of this iterable collection to create a new mutable buffer.

     Note: will not terminate for infinite-sized collections.

     returns

       a buffer containing all elements of this iterable collection.

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       TraversableOnce → GenTraversableOnce
109.  def toIndexedSeq: collection.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.

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       TraversableOnce → GenTraversableOnce
110.  def toIterable: collection.Iterable[A]

     Returns this iterable collection as an iterable collection.

     Returns this iterable collection as an iterable collection.

     A new collection will not be built; lazy collections will stay lazy.

     Note: will not terminate for infinite-sized collections.

     returns

       an `Iterable` containing all elements of this iterable collection.

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       IterableLike → TraversableOnce → GenTraversableOnce
111.  def toIterator: collection.Iterator[A]

     Returns an Iterator over the elements in this iterable collection.

     Returns an Iterator over the elements in this iterable collection. Produces the same result as `iterator`.

     Note: will not terminate for infinite-sized collections.

     returns

       an Iterator containing all elements of this iterable collection.

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       IterableLike → TraversableLike → GenTraversableOnce
     Annotations
       @deprecatedOverriding( message = ... , since = "2.11.0" )
112.  final def toLeft[X](right: ⇒ X): Either[A, X]

     Returns a scala.util.Right containing the given argument `right` if this is empty, or a scala.util.Left containing this scala.Option's value if this scala.Option is nonempty.

     Returns a scala.util.Right containing the given argument `right` if this is empty, or a scala.util.Left containing this scala.Option's value if this scala.Option is nonempty.

     This is equivalent to:

         option match {
           case Some(x) => Left(x)
           case None    => Right(right)
         }

     right

       the expression to evaluate and return if this is empty

     Definition Classes
       Option
     Annotations
       @inline()
     See also

       toRight

113.  def toList: List[A]

     Returns a singleton list containing the scala.Option's value if it is nonempty, or the empty list if the scala.Option is empty.

     Returns a singleton list containing the scala.Option's value if it is nonempty, or the empty list if the scala.Option is empty.

     This is equivalent to:

         option match {
           case Some(x) => List(x)
           case None    => Nil
         }

     Definition Classes
       Option
114.  def toMap[T, U]: Map[T, U]

     [use case] Converts this option to a map.

     [use case]

     Converts this option 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 of type `immutable.Map[T, U]` containing all key/value pairs of type `(T, U)` of this option.

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       TraversableOnce → GenTraversableOnce
      Full Signature

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

115.  final def toRight[X](left: ⇒ X): Either[X, A]

     Returns a scala.util.Left containing the given argument `left` if this scala.Option is empty, or a scala.util.Right containing this scala.Option's value if this is nonempty.

     Returns a scala.util.Left containing the given argument `left` if this scala.Option is empty, or a scala.util.Right containing this scala.Option's value if this is nonempty.

     This is equivalent to:

         option match {
           case Some(x) => Right(x)
           case None    => Left(left)
         }

     left

       the expression to evaluate and return if this is empty

     Definition Classes
       Option
     Annotations
       @inline()
     See also

       toLeft

116.  def toSeq: collection.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.

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       TraversableOnce → GenTraversableOnce
117.  def toSet[B >: A]: 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.

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       TraversableOnce → GenTraversableOnce
118.  def toStream: collection.immutable.Stream[A]

     Converts this iterable collection to a stream.

     Converts this iterable collection to a stream.

     returns

       a stream containing all elements of this iterable collection.

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       IterableLike → TraversableLike → GenTraversableOnce
119.  def toString(): String

     Converts this iterable collection to a string.

     Converts this iterable collection to a string.

     returns

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

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       TraversableLike → Any
120.  def toTraversable: collection.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.

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       TraversableLike → TraversableOnce → GenTraversableOnce
     Annotations
       @deprecatedOverriding( message = ... , since = "2.11.0" )
121.  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.

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       TraversableOnce → GenTraversableOnce
122.  def transpose[B](implicit asTraversable: (A) ⇒ GenTraversableOnce[B]): collection.Iterable[collection.Iterable[B]]

     Transposes this iterable collection of traversable collections into a iterable collection of iterable collections.

     Transposes this iterable collection of traversable collections into a iterable collection of iterable collections.

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

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

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

     B

       the type of the elements of each traversable collection.

     asTraversable

       an implicit conversion which asserts that the element type of this iterable collection is a `Traversable`.

     returns

       a two-dimensional iterable collection of iterable collections which has as nth row the nth column of this iterable collection.

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       GenericTraversableTemplate
     Annotations
       @migration
     Migration

       (Changed in version 2.9.0) `transpose` throws an `IllegalArgumentException` if collections are not uniformly sized.

     Exceptions thrown

       `IllegalArgumentException` if all collections in this iterable collection are not of the same size.

123.  def unzip[A1, A2](implicit asPair: (A) ⇒ (A1, A2)): (collection.Iterable[A1], collection.Iterable[A2])

     Converts this iterable collection of pairs into two collections of the first and second half of each pair.

     Converts this iterable collection of pairs into two collections of the first and second half of each pair.

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

     A1

       the type of the first half of the element pairs

     A2

       the type of the second half of the element pairs

     asPair

       an implicit conversion which asserts that the element type of this iterable collection is a pair.

     returns

       a pair of iterable collections, containing the first, respectively second half of each element pair of this iterable collection.

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       GenericTraversableTemplate
124.  def unzip3[A1, A2, A3](implicit asTriple: (A) ⇒ (A1, A2, A3)): (collection.Iterable[A1], collection.Iterable[A2], collection.Iterable[A3])

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

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

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

     A1

       the type of the first member of the element triples

     A2

       the type of the second member of the element triples

     A3

       the type of the third member of the element triples

     asTriple

       an implicit conversion which asserts that the element type of this iterable collection is a triple.

     returns

       a triple of iterable collections, containing the first, second, respectively third member of each element triple of this iterable collection.

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       GenericTraversableTemplate
125.  val value: A
126.  def view(from: Int, until: Int): IterableView[A, collection.Iterable[A]]

     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`.

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       IterableLike → TraversableLike
127.  def view: IterableView[A, collection.Iterable[A]]

     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.

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       IterableLike → TraversableLike
128.  final def wait(): Unit
     Definition Classes
       AnyRef
     Annotations
       @throws( ... )
129.  final def wait(arg0: Long, arg1: Int): Unit
     Definition Classes
       AnyRef
     Annotations
       @throws( ... )
130.  final def wait(arg0: Long): Unit
     Definition Classes
       AnyRef
     Annotations
       @throws( ... ) @native()
131.  final def withFilter(p: (A) ⇒ Boolean): WithFilter

     Necessary to keep scala.Option from being implicitly converted to scala.collection.Iterable in `for` comprehensions.

     Necessary to keep scala.Option from being implicitly converted to scala.collection.Iterable in `for` comprehensions.

     Definition Classes
       Option
     Annotations
       @inline()
132.  def zip[B](that: GenIterable[B]): Option[(A, B)]

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

     [use case]

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

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       IterableLike → GenIterableLike
      Full Signature

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

133.  def zipAll[B](that: collection.Iterable[B], thisElem: A, thatElem: B): Option[(A, B)]

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

     [use case]

     Returns a option formed from this option 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.

     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 option is shorter than `that`.

     thatElem

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

     returns

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

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       IterableLike → GenIterableLike
      Full Signature

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

134.  def zipWithIndex: Option[(A, Int)]

     [use case] Zips this option with its indices.

     [use case]

     Zips this option with its indices.

     returns

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

     Implicit
       This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
     Definition Classes
       IterableLike → GenIterableLike
      Full Signature

     #### def zipWithIndex[A1 >: A, That](implicit bf: CanBuildFrom[collection.Iterable[A], (A1, Int), That]): That

     Example:

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

135.  def →[B](y: B): (Some[A], B)
     Implicit
       This member is added by an implicit conversion from Some[A] to ArrowAssoc[Some[A]] performed by method ArrowAssoc in scala.Predef.
     Definition Classes
       ArrowAssoc

### Shadowed Implicit Value Members

1.  def collect[B](pf: PartialFunction[A, B]): Option[B]

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

   [use case]

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

   B

     the element type of the returned collection.

   pf

     the partial function which filters and maps the option.

   returns

     a new option 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.

   Implicit
     This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
   Shadowing
     This implicitly inherited member is shadowed by one or more members in this class.
     To access this member you can use a type ascription:

         (some: Iterable[A]).collect(pf)

   Definition Classes
     TraversableLike → GenTraversableLike
    Full Signature

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

2.  def exists(p: (A) ⇒ Boolean): Boolean

   Tests whether a predicate holds for at least one element of this iterable collection.

   Tests whether a predicate holds for at least one element of this iterable collection.

   Note: may not terminate for infinite-sized collections.

   p

     the predicate used to test elements.

   returns

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

   Implicit
     This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
   Shadowing
     This implicitly inherited member is shadowed by one or more members in this class.
     To access this member you can use a type ascription:

         (some: Iterable[A]).exists(p)

   Definition Classes
     IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce
3.  def filter(p: (A) ⇒ Boolean): collection.Iterable[A]

   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.

   Implicit
     This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
   Shadowing
     This implicitly inherited member is shadowed by one or more members in this class.
     To access this member you can use a type ascription:

         (some: Iterable[A]).filter(p)

   Definition Classes
     TraversableLike → GenTraversableLike
4.  def filterNot(p: (A) ⇒ Boolean): collection.Iterable[A]

   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.

   Implicit
     This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
   Shadowing
     This implicitly inherited member is shadowed by one or more members in this class.
     To access this member you can use a type ascription:

         (some: Iterable[A]).filterNot(p)

   Definition Classes
     TraversableLike → GenTraversableLike
5.  def flatMap[B](f: (A) ⇒ GenTraversableOnce[B]): Option[B]

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

   [use case]

   Builds a new collection by applying a function to all elements of this option 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 option. 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 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 option resulting from applying the given collection-valued function `f` to each element of this option and concatenating the results.

   Implicit
     This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
   Shadowing
     This implicitly inherited member is shadowed by one or more members in this class.
     To access this member you can use a type ascription:

         (some: Iterable[A]).flatMap(f)

   Definition Classes
     TraversableLike → GenTraversableLike → FilterMonadic
    Full Signature

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

6.  def flatten[B]: Option[B]

   [use case] Converts this option of traversable collections into a option formed by the elements of these traversable collections.

   [use case]

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

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

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

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

   B

     the type of the elements of each traversable collection.

   returns

     a new option resulting from concatenating all element options.

   Implicit
     This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
   Shadowing
     This implicitly inherited member is shadowed by one or more members in this class.
     To access this member you can use a type ascription:

         (some: Iterable[A]).flatten

   Definition Classes
     GenericTraversableTemplate
    Full Signature

   #### def flatten[B](implicit asTraversable: (A) ⇒ GenTraversableOnce[B]): collection.Iterable[B]

7.  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.

   Note: will not terminate for infinite-sized collections.

   A1

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

   z

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

   op

     a binary operator that must be associative.

   returns

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

   Implicit
     This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
   Shadowing
     This implicitly inherited member is shadowed by one or more members in this class.
     To access this member you can use a type ascription:

         (some: Iterable[A]).fold(z)(op)

   Definition Classes
     TraversableOnce → GenTraversableOnce
8.  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 this iterable collection is empty or the given predicate `p` holds for all elements of this iterable collection, otherwise `false`.

   Implicit
     This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
   Shadowing
     This implicitly inherited member is shadowed by one or more members in this class.
     To access this member you can use a type ascription:

         (some: Iterable[A]).forall(p)

   Definition Classes
     IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce
9.  def foreach(f: (A) ⇒ Unit): Unit

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

   [use case]

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

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

   f

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

   Implicit
     This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
   Shadowing
     This implicitly inherited member is shadowed by one or more members in this class.
     To access this member you can use a type ascription:

         (some: Iterable[A]).foreach(f)

   Definition Classes
     IterableLike → TraversableLike → GenTraversableLike → TraversableOnce → GenTraversableOnce → FilterMonadic
    Full Signature

   #### def foreach[U](f: (A) ⇒ U): Unit

10.  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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (some: Iterable[A]).isEmpty

    Definition Classes
      IterableLike → TraversableLike → TraversableOnce → GenTraversableOnce
11.  def iterator: collection.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

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (some: Iterable[A]).iterator

    Definition Classes
      IterableLike → GenIterableLike
12.  def map[B](f: (A) ⇒ B): Option[B]

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

    [use case]

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

    B

      the element type of the returned collection.

    f

      the function to apply to each element.

    returns

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

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (some: Iterable[A]).map(f)

    Definition Classes
      TraversableLike → GenTraversableLike → FilterMonadic
     Full Signature

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

13.  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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (some: Iterable[A]).nonEmpty

    Definition Classes
      TraversableOnce → GenTraversableOnce
14.  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.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (some: Iterable[A]).toList

    Definition Classes
      TraversableOnce → GenTraversableOnce
15.  def withFilter(p: (A) ⇒ Boolean): FilterMonadic[A, collection.Iterable[A]]

    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`.

    Implicit
      This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
    Shadowing
      This implicitly inherited member is shadowed by one or more members in this class.
      To access this member you can use a type ascription:

          (some: Iterable[A]).withFilter(p)

    Definition Classes
      TraversableLike → FilterMonadic

### Deprecated Value Members

1.  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 = List(1,2,3,4)
       a: List[Int] = List(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.

   Implicit
     This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
   Definition Classes
     TraversableOnce → GenTraversableOnce
   Annotations
     @deprecated
   Deprecated

     (Since version 2.12.10) Use foldLeft instead of /:

2.  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 = List(1,2,3,4)
       a: List[Int] = List(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.

   Implicit
     This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
   Definition Classes
     TraversableOnce → GenTraversableOnce
   Annotations
     @deprecated
   Deprecated

     (Since version 2.12.10) Use foldRight instead of :\

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

   Returns string formatted according to given `format` string.

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

   Implicit
     This member is added by an implicit conversion from Some[A] to StringFormat[Some[A]] performed by method StringFormat in scala.Predef.
   Definition Classes
     StringFormat
   Annotations
     @deprecated @inline()
   Deprecated

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

4.  def x: A
   Annotations
     @deprecated
   Deprecated

     (Since version 2.12.0) Use .value instead.

### Inherited from Option[A]

### Inherited from Serializable

### Inherited from java.io.Serializable

### Inherited from Product

### Inherited from Equals

### Inherited from AnyRef

### Inherited from Any

### Inherited by implicit conversion option2Iterable from Some[A] to Iterable[A]

### Inherited by implicit conversion any2stringadd from Some[A] to any2stringadd[Some[A]]

### Inherited by implicit conversion StringFormat from Some[A] to StringFormat[Some[A]]

### Inherited by implicit conversion Ensuring from Some[A] to Ensuring[Some[A]]

### Inherited by implicit conversion ArrowAssoc from Some[A] to ArrowAssoc[Some[A]]

### Ungrouped