Some

Instance Constructors

new Some(x: A)

Type Members

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.

Value Members

final def !=(arg0: AnyRef): Boolean

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

Test two objects for inequality.
Test two objects for inequality.
returns
true if !(this == that), false otherwise.

Definition Classes
Any
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
def +(other: String): String

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

[use case] Returns a new option containing the elements from the left hand operand followed by the elements from the right hand operand.
[use case]
Returns a new option containing the elements from the left hand operand followed by the elements from the right hand operand. The element type of the option is the most specific superclass encompassing the element types of the two operands.
Example:
```
scala> val a = LinkedList(1)
a: scala.collection.mutable.LinkedList[Int] = LinkedList(1)

scala> val b = LinkedList(2)
b: scala.collection.mutable.LinkedList[Int] = LinkedList(2)

scala> val c = a ++ b
c: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2)

scala> val d = LinkedList('a')
d: scala.collection.mutable.LinkedList[Char] = LinkedList(a)

scala> val e = c ++ d
e: scala.collection.mutable.LinkedList[AnyVal] = LinkedList(1, 2, a)
```
B
the element type of the returned collection.
that
the traversable to append.
returns
a new option which contains all elements of this option followed by all elements of that.

Implicit information
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
Full Signature
def ++[B >: A, That](that: GenTraversableOnce[B])(implicit bf: CanBuildFrom[Iterable[A], B, That]): That
def ++:[B >: A, That](that: Traversable[B])(implicit bf: CanBuildFrom[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. In the standard library configuration, That is Iterable[B]
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 option followed by all elements of that.

Implicit information
This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
Definition Classes
TraversableLike
def ++:[B](that: 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 information
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: TraversableOnce[B])(implicit bf: CanBuildFrom[Iterable[A], B, That]): That
def ->[B](y: B): (Some[A], B)

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

Applies a binary operator to a start value and all elements of this option, going left to right.
Applies a binary operator to a start value and all elements of this option, going left to right.
Note: /: is alternate syntax for foldLeft; z /: xs is the same as xs foldLeft z.
Examples:
Note that the folding function used to compute b is equivalent to that used to compute c.
```
scala> val a = LinkedList(1,2,3,4)
a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)

scala> val b = (5 /: a)(_+_)
b: Int = 15

scala> val c = (5 /: a)((x,y) => x + y)
c: Int = 15
```
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 option, going left to right with the start value z on the left:
```
op(...op(op(z, x_1), x_2), ..., x_n)
```
where x₁, ..., x_n are the elements of this option.
Implicit information
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
def :\[B](z: B)(op: (A, B) ⇒ B): B

Applies a binary operator to all elements of this option and a start value, going right to left.
Applies a binary operator to all elements of this option and a start value, going right to left.
Note: :\ is alternate syntax for foldRight; xs :\ z is the same as xs foldRight z.
Examples:
Note that the folding function used to compute b is equivalent to that used to compute c.
```
scala> val a = LinkedList(1,2,3,4)
a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)

scala> val b = (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 option, going right to left with the start value z on the right:
```
op(x_1, op(x_2, ... op(x_n, z)...))
```
where x₁, ..., x_n are the elements of this option.
Implicit information
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
final def ==(arg0: AnyRef): Boolean

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

Test two objects for equality.
Test two objects for equality. The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).
returns
true if the receiver object is equivalent to the argument; false otherwise.

Definition Classes
Any
def addString(b: StringBuilder): StringBuilder

Appends all elements of this option to a string builder.
Appends all elements of this option to a string builder. The written text consists of the string representations (w.r.t. the method toString) of all elements of this option without any separator string.
Example:
```
scala> val a = LinkedList(1,2,3,4)
a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)

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

scala> val h = a.addString(b)
b: StringBuilder = 1234
```
b
the string builder to which elements are appended.
returns
the string builder b to which elements were appended.

Implicit information
This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
Definition Classes
TraversableOnce
def addString(b: StringBuilder, sep: String): StringBuilder

Appends all elements of this option to a string builder using a separator string.
Appends all elements of this option 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 option, separated by the string sep.
Example:
```
scala> val a = LinkedList(1,2,3,4)
a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)

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

scala> a.addString(b, ", ")
res0: StringBuilder = 1, 2, 3, 4
```
b
the string builder to which elements are appended.
sep
the separator string.
returns
the string builder b to which elements were appended.

Implicit information
This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
Definition Classes
TraversableOnce
def addString(b: StringBuilder, start: String, sep: String, end: String): StringBuilder

Appends all elements of this option to a string builder using start, end, and separator strings.
Appends all elements of this option 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 option are separated by the string sep.
Example:
```
scala> val a = LinkedList(1,2,3,4)
a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)

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

scala> a.addString(b, "LinkedList(", ", ", ")")
res1: StringBuilder = LinkedList(1, 2, 3, 4)
```
b
the string builder to which elements are appended.
start
the starting string.
sep
the separator string.
end
the ending string.
returns
the string builder b to which elements were appended.

Implicit information
This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
Definition Classes
TraversableOnce
def aggregate[B](z: B)(seqop: (B, A) ⇒ B, combop: (B, B) ⇒ B): B

Aggregates the results of applying an operator to subsequent elements.
Aggregates the results of applying an operator to subsequent elements.
This is a more general form of fold and reduce. It has similar semantics, but does not require the result to be a supertype of the element type. It traverses the elements in different partitions sequentially, using seqop to update the result, and then applies combop to results from different partitions. The implementation of this operation may operate on an arbitrary number of collection partitions, so combop may be invoked an arbitrary number of times.
For example, one might want to process some elements and then produce a Set. In this case, seqop would process an element and append it to the list, while combop would concatenate two lists from different partitions together. The initial value z would be an empty set.
```
pc.aggregate(Set[Int]())(_ += process(_), _ ++ _)
```
Another example is calculating geometric mean from a collection of doubles (one would typically require big doubles for this).
B
the type of accumulated results
z
the initial value for the accumulated result of the partition - this will typically be the neutral element for the seqop operator (e.g. Nil for list concatenation or 0 for summation)
seqop
an operator used to accumulate results within a partition
combop
an associative operator used to combine results from different partitions

Implicit information
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
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.
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()
Note
not specified by SLS as a member of AnyRef
def collect[B](pf: PartialFunction[A, B]): Option[B]

Returns a Some containing the result of applying pf to this Option's contained value, if this option is nonempty and pf is defined for that value.
Returns a Some containing the result of applying pf to this 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 Option's value (if possible), or None.

Definition Classes
Option
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 information
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
Full Signature
def collect[B, That](pf: PartialFunction[A, B])(implicit bf: CanBuildFrom[Iterable[A], B, That]): That
def collectFirst[B](pf: PartialFunction[A, B]): Option[B]

Finds the first element of the option for which the given partial function is defined, and applies the partial function to it.
Finds the first element of the option for which the given partial function is defined, and applies the partial function to it.
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 information
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)
def companion: GenericCompanion[Iterable]

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

Implicit information
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
def copyToArray(xs: Array[A], start: Int, len: Int): Unit

[use case] Copies elements of this option to an array.
[use case]
Copies 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 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 information
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
def copyToArray(xs: Array[A]): Unit

[use case] Copies values of this option to an array.
[use case]
Copies values 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 array is reached.
xs
the array to fill.

Implicit information
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
def copyToArray(xs: Array[A], start: Int): Unit

[use case] Copies values of this option to an array.
[use case]
Copies values 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 array is reached.
xs
the array to fill.
start
the starting index.

Implicit information
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
def copyToBuffer[B >: A](dest: Buffer[B]): Unit

Copies all elements of this option to a buffer.
Copies all elements of this option to a buffer.
dest
The buffer to which elements are copied.

Implicit information
This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
Definition Classes
TraversableOnce
def count(p: (A) ⇒ Boolean): Int

Counts the number of elements in the option which satisfy a predicate.
Counts the number of elements in the option which satisfy a predicate.
p
the predicate used to test elements.
returns
the number of elements satisfying the predicate p.

Implicit information
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
def drop(n: Int): Iterable[A]

Selects all elements except first n ones.
Selects all elements except first n ones.
n
the number of elements to drop from this option.
returns
a option consisting of all elements of this option except the first n ones, or else the empty option, if this option has less than n elements.

Implicit information
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
def dropRight(n: Int): Iterable[A]

Selects all elements except last n ones.
Selects all elements except last n ones.
n
The number of elements to take
returns
a option consisting of all elements of this option except the last n ones, or else the empty option, if this option has less than n elements.

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

Drops longest prefix of elements that satisfy a predicate.
Drops longest prefix of elements that satisfy a predicate.
returns
the longest suffix of this option whose first element does not satisfy the predicate p.

Implicit information
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
def ensuring(cond: (Some[A]) ⇒ Boolean, msg: ⇒ Any): Some[A]

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

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

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

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

Tests whether the argument (arg0) is a reference to the receiver object (this).
Tests whether the argument (arg0) is a reference to the receiver object (this).
The eq method implements an equivalence relation on non-null instances of AnyRef, and has three additional properties:
- It is consistent: for any non-null instances x and y of type AnyRef, multiple invocations of x.eq(y) consistently returns true or consistently returns false.
- For any non-null instance x of type AnyRef, x.eq(null) and null.eq(x) returns false.
- null.eq(null) returns true.
When overriding the equals or hashCode methods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2), they should be equal to each other (o1 == o2) and they should hash to the same value (o1.hashCode == o2.hashCode).
returns
true if the argument is a reference to the receiver object; false otherwise.

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

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

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

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

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

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

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

Called by the garbage collector on the receiver object when there are no more references to the object.
Called by the garbage collector on the receiver object when there are no more references to the object.
The details of when and if the finalize method is invoked, as well as the interaction between finalize and non-local returns and exceptions, are all platform dependent.

Attributes
protected[lang]
Definition Classes
AnyRef
Annotations
@throws()
Note
not specified by SLS as a member of AnyRef
def find(p: (A) ⇒ Boolean): Option[A]

Finds the first element of the option satisfying a predicate, if any.
Finds the first element of the option satisfying a predicate, if any.
p
the predicate used to test elements.
returns
an option value containing the first element in the option that satisfies p, or None if none exists.

Implicit information
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
final def flatMap[B](f: (A) ⇒ Option[B]): Option[B]

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

Definition Classes
Option
Annotations
@inline()
See also
foreach
map
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 a an Iterable[Int]
val xs = Map("a" -> List(11,111), "b" -> List(22,222)).flatMap(_._2)

// ys will be a Map[Int, Int]
val ys = Map("a" -> List(1 -> 11,1 -> 111), "b" -> List(2 -> 22,2 -> 222)).flatMap(_._2)
```
B
the element type of the returned collection.
f
the function to apply to each element.
returns
a new option resulting from applying the given collection-valued function f to each element of this option and concatenating the results.

Implicit information
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 → FilterMonadic
Full Signature
def flatMap[B, That](f: (A) ⇒ GenTraversableOnce[B])(implicit bf: CanBuildFrom[Iterable[A], B, That]): That
def flatten[B](implicit ev: <:<[A, Option[B]]): Option[B]

Definition Classes
Option
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))
// xs == List(1, 2, 3, 1, 2, 3)

val ys = Set(List(1, 2, 3), List(3, 2, 1))
// 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 information
This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
Definition Classes
GenericTraversableTemplate
Full Signature
def flatten[B](implicit asTraversable: (A) ⇒ GenTraversableOnce[B]): Iterable[B]
final def fold[B](ifEmpty: ⇒ B)(f: (A) ⇒ B): B

Returns the result of applying f to this Option's value if the Option is nonempty.
Returns the result of applying f to this Option's value if the Option is nonempty. Otherwise, evaluates expression ifEmpty.
ifEmpty
the expression to evaluate if empty.
f
the function to apply if nonempty.

Definition Classes
Option
Annotations
@inline()
Note
This is equivalent to Option map f getOrElse ifEmpty.
def fold[A1 >: A](z: A1)(op: (A1, A1) ⇒ A1): A1

Folds the elements of this option using the specified associative binary operator.
Folds the elements of this option using the specified associative binary operator.
A1
a type parameter for the binary operator, a supertype of A.
z
a neutral element for the fold operation; may be added to the result an arbitrary number of times, and must not change the result (e.g., Nil for list concatenation, 0 for addition, or 1 for multiplication.)
op
a binary operator that must be associative
returns
the result of applying fold operator op between all the elements and z

Implicit information
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
def foldLeft[B](z: B)(op: (B, A) ⇒ B): B

Applies a binary operator to a start value and all elements of this option, going left to right.
Applies a binary operator to a start value and all elements of this option, going left to right.
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 option, going left to right with the start value z on the left:
```
op(...op(z, x_1), x_2, ..., x_n)
```
where x₁, ..., x_n are the elements of this option.
Implicit information
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
def foldRight[B](z: B)(op: (A, B) ⇒ B): B

Applies a binary operator to all elements of this option and a start value, going right to left.
Applies a binary operator to all elements of this option and a start value, going right to left.
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 option, going right to left with the start value z on the right:
```
op(x_1, op(x_2, ... op(x_n, z)...))
```
where x₁, ..., x_n are the elements of this option.
Implicit information
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
final def forall(p: (A) ⇒ Boolean): Boolean

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

Definition Classes
Option
Annotations
@inline()
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.
f
the procedure to apply.

Definition Classes
Option
Annotations
@inline()
See also
flatMap
map
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 information
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 → TraversableOnce → GenTraversableOnce → FilterMonadic
Full Signature
def foreach[U](f: (A) ⇒ U): Unit
def formatted(fmtstr: String): String

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

Implicit information
This member is added by an implicit conversion from Some[A] to StringFormat performed by method any2stringfmt in scala.Predef.
Definition Classes
StringFormat
Annotations
@inline()
def genericBuilder[B]: Builder[B, Iterable[B]]

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

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

Returns the option's value.
Returns the option's value.

Definition Classes
Some → Option
Exceptions thrown
Predef.NoSuchElementException
if the option is empty.
Note
The option must be nonEmpty.
final def getClass(): Class[_]

A representation that corresponds to the dynamic class of the receiver object.
A representation that corresponds to the dynamic class of the receiver object.
The nature of the representation is platform dependent.
returns
a representation that corresponds to the dynamic class of the receiver object.

Definition Classes
AnyRef → Any
Note
not specified by SLS as a member of AnyRef
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.
default
the default expression.

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

Partitions this option into a map of options according to some discriminator function.
Partitions this option into a map of options 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 option.
K
the type of keys returned by the discriminator function.
f
the discriminator function.
returns
A map from keys to options such that the following invariant holds:
```
(xs partition f)(k) = xs filter (x => f(x) == k)
```
That is, every key k is bound to a option of those elements x for which f(x) equals k.
Implicit information
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
def grouped(size: Int): Iterator[Iterable[A]]

Partitions elements in fixed size options.
Partitions elements in fixed size options.
size
the number of elements per group
returns
An iterator producing options of size size, except the last will be truncated if the elements don't divide evenly.

Implicit information
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
Iterator, method grouped
def hasDefiniteSize: Boolean

Tests whether this option is known to have a finite size.
Tests whether this option is known to have a finite size. All strict collections are known to have finite size. For a non-strict collection such as Stream, the predicate returns true if all elements have been computed. It returns false if the stream is not yet evaluated to the end.
Note: many collection methods will not work on collections of infinite sizes.
returns
true if this collection is known to have finite size, false otherwise.

Implicit information
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
def head: A

Selects the first element of this option.
Selects the first element of this option.
returns
the first element of this option.

Implicit information
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 option is empty.
def headOption: Option[A]

Optionally selects the first element.
Optionally selects the first element.
returns
the first element of this option if it is nonempty, None if it is empty.

Implicit information
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
def init: Iterable[A]

Selects all elements except the last.
Selects all elements except the last.
returns
a option consisting of all elements of this option except the last one.

Implicit information
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 option is empty.
def inits: Iterator[Iterable[A]]

Iterates over the inits of this option.
Iterates over the inits of this option. The first value will be this option and the final one will be an empty option, with the intervening values the results of successive applications of init.
returns
an iterator over all the inits of this option
Implicit information
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)
def isDefined: Boolean

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

Definition Classes
Option
def isEmpty: Boolean

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

Definition Classes
Some → Option
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
final def isTraversableAgain: Boolean

Tests whether this option can be repeatedly traversed.
Tests whether this option can be repeatedly traversed.
returns
true

Implicit information
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
def iterator: Iterator[A]

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

Definition Classes
Option
def last: A

Selects the last element.
Selects the last element.
returns
The last element of this option.

Implicit information
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 option is empty.
def lastOption: Option[A]

Optionally selects the last element.
Optionally selects the last element.
returns
the last element of this option$ if it is nonempty, None if it is empty.

Implicit information
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
final def map[B](f: (A) ⇒ B): Option[B]

Returns a Some containing the result of applying f to this Option's value if this Option is nonempty.
Returns a Some containing the result of applying f to this Option's value if this Option is nonempty. Otherwise return 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 Option.
See also
foreach
flatMap
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 information
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 → FilterMonadic
Full Signature
def map[B, That](f: (A) ⇒ B)(implicit bf: CanBuildFrom[Iterable[A], B, That]): That
def max: A

[use case] Finds the largest element.
[use case]
Finds the largest element.
returns
the largest element of this option.

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

Implicit information
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
def min: A

[use case] Finds the smallest element.
[use case]
Finds the smallest element.
returns
the smallest element of this option

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

Implicit information
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
def mkString: String

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

Implicit information
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
def mkString(sep: String): String

Displays all elements of this option in a string using a separator string.
Displays all elements of this option in a string using a separator string.
sep
the separator string.
returns
a string representation of this option. In the resulting string the string representations (w.r.t. the method toString) of all elements of this option are separated by the string sep.
Implicit information
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"
def mkString(start: String, sep: String, end: String): String

Displays all elements of this option in a string using start, end, and separator strings.
Displays all elements of this option 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 option. 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 option are separated by the string sep.
Implicit information
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)"
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
final def nonEmpty: Boolean

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

Definition Classes
Option
Note
Implemented here to avoid the implicit conversion to Iterable.
final def notify(): Unit

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

Definition Classes
AnyRef
Note
not specified by SLS as a member of AnyRef
final def notifyAll(): Unit

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

Definition Classes
AnyRef
Note
not specified by SLS as a member of AnyRef
final def orElse[B >: A](alternative: ⇒ Option[B]): Option[B]

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

Definition Classes
Option
Annotations
@inline()
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 Option must often interface with code that expects and returns nulls.
Definition Classes
Option
Annotations
@inline()
Example:
1. val initalText: Option[String] = getInitialText val textField = new JComponent(initalText.orNull,20)
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 information
This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
Definition Classes
Parallelizable
def partition(p: (A) ⇒ Boolean): (Iterable[A], Iterable[A])

Partitions this option in two options according to a predicate.
Partitions this option in two options according to a predicate.
p
the predicate on which to partition.
returns
a pair of options: the first option consists of all elements that satisfy the predicate p and the second option consists of all elements that don't. The relative order of the elements in the resulting options is the same as in the original option.

Implicit information
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
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 information
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
def reduce[A1 >: A](op: (A1, A1) ⇒ A1): A1

Reduces the elements of this option using the specified associative binary operator.
Reduces the elements of this option using the specified associative binary operator.
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 option is nonempty.

Implicit information
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 option is empty.
def reduceLeft[B >: A](op: (B, A) ⇒ B): B

Implicit information
This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
Definition Classes
TraversableOnce
def reduceLeftOption[B >: A](op: (B, A) ⇒ B): Option[B]

Optionally applies a binary operator to all elements of this option, going left to right.
Optionally applies a binary operator to all elements of this option, going left to right.
B
the result type of the binary operator.
op
the binary operator.
returns
an option value containing the result of reduceLeft(op) is this option is nonempty, None otherwise.

Implicit information
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
def reduceOption[A1 >: A](op: (A1, A1) ⇒ A1): Option[A1]

Reduces the elements of this option, if any, using the specified associative binary operator.
Reduces the elements of this option, if any, using the specified associative binary operator.
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 information
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
def reduceRight[B >: A](op: (A, B) ⇒ B): B

Applies a binary operator to all elements of this option, going right to left.
Applies a binary operator to all elements of this option, going right to left.
B
the result type of the binary operator.
op
the binary operator.
returns
the result of inserting op between consecutive elements of this option, going right to left:
```
op(x_1, op(x_2, ..., op(x_{n-1}, x_n)...))
```
where x₁, ..., x_n are the elements of this option.
Implicit information
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 option is empty.
def reduceRightOption[B >: A](op: (A, B) ⇒ B): Option[B]

Optionally applies a binary operator to all elements of this option, going right to left.
Optionally applies a binary operator to all elements of this option, going right to left.
B
the result type of the binary operator.
op
the binary operator.
returns
an option value containing the result of reduceRight(op) is this option is nonempty, None otherwise.

Implicit information
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
def repr: Iterable[A]

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

Implicit information
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
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 information
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
def scan[B >: A, That](z: B)(op: (B, B) ⇒ B)(implicit cbf: CanBuildFrom[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 option containing the prefix scan of the elements in this option

Implicit information
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
def scanLeft[B, That](z: B)(op: (B, A) ⇒ B)(implicit bf: CanBuildFrom[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.
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 information
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
def scanRight[B, That](z: B)(op: (A, B) ⇒ B)(implicit bf: CanBuildFrom[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.
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 information
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.
val self: Any

Implicit information
This member is added by an implicit conversion from Some[A] to StringAdd performed by method any2stringadd in scala.Predef.
Definition Classes
StringAdd
val self: Any

Implicit information
This member is added by an implicit conversion from Some[A] to StringFormat performed by method any2stringfmt in scala.Predef.
Definition Classes
StringFormat
def seq: Iterable[A]

A version of this collection with all of the operations implemented sequentially (i.
A version of this collection with all of the operations implemented sequentially (i.e. in a single-threaded manner).
This method returns a reference to this collection. In parallel collections, it is redefined to return a sequential implementation of this collection. In both cases, it has O(1) complexity.
returns
a sequential view of the collection.

Implicit information
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
def size: Int

The size of this option.
The size of this option.
returns
the number of elements in this option.

Implicit information
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
def slice(from: Int, until: Int): 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
```
returns
a option containing the elements greater than or equal to index from extending up to (but not including) index until of this option.

Implicit information
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
def sliding(size: Int, step: Int): Iterator[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 (defaults to 1)
returns
An iterator producing options of size size, except the last and the only element will be truncated if there are fewer elements than size.

Implicit information
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
Iterator, method sliding
def sliding(size: Int): Iterator[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
returns
An iterator producing options of size size, except the last and the only element will be truncated if there are fewer elements than size.

Implicit information
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
Iterator, method sliding
def span(p: (A) ⇒ Boolean): (Iterable[A], Iterable[A])

Splits this option into a prefix/suffix pair according to a predicate.
Splits this option 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.
returns
a pair consisting of the longest prefix of this option whose elements all satisfy p, and the rest of this option.

Implicit information
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
def splitAt(n: Int): (Iterable[A], Iterable[A])

Splits this option into two at a given position.
Splits this option into two at a given position. Note: c splitAt n is equivalent to (but possibly more efficient than) (c take n, c drop n).
n
the position at which to split.
returns
a pair of options consisting of the first n elements of this option, and the other elements.

Implicit information
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
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 option. By default the string prefix is the simple name of the collection class option.

Implicit information
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
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 information
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
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def tail: Iterable[A]

Selects all elements except the first.
Selects all elements except the first.
returns
a option consisting of all elements of this option except the first one.

Implicit information
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 option is empty.
def tails: Iterator[Iterable[A]]

Iterates over the tails of this option.
Iterates over the tails of this option. The first value will be this option and the final one will be an empty option, with the intervening values the results of successive applications of tail.
returns
an iterator over all the tails of this option
Implicit information
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)
def take(n: Int): Iterable[A]

Selects first n elements.
Selects first n elements.
n
Tt number of elements to take from this option.
returns
a option consisting only of the first n elements of this option, or else the whole option, if it has less than n elements.

Implicit information
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
def takeRight(n: Int): Iterable[A]

Selects last n elements.
Selects last n elements.
n
the number of elements to take
returns
a option consisting only of the last n elements of this option, or else the whole option, if it has less than n elements.

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

Takes longest prefix of elements that satisfy a predicate.
Takes longest prefix of elements that satisfy a predicate.
returns
the longest prefix of this option whose elements all satisfy the predicate p.

Implicit information
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
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 information
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]
def toBuffer[B >: A]: Buffer[B]

Converts this option to a mutable buffer.
Converts this option to a mutable buffer.
returns
a buffer containing all elements of this option.

Implicit information
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
def toIndexedSeq: IndexedSeq[A]

Converts this option to an indexed sequence.
Converts this option to an indexed sequence.
returns
an indexed sequence containing all elements of this option.

Implicit information
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
def toIterable: Iterable[A]

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

Implicit information
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
def toIterator: Iterator[A]

Returns an Iterator over the elements in this option.
Returns an Iterator over the elements in this option. Will return the same Iterator if this instance is already an Iterator.
returns
an Iterator containing all elements of this option.

Implicit information
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
final def toLeft[X](right: ⇒ X): Product with Serializable with Either[A, X]

Returns a Right containing the given argument right if this is empty, or a Left containing this Option's value if this Option is nonempty.
Returns a Right containing the given argument right if this is empty, or a Left containing this Option's value if this Option is nonempty.
right
the expression to evaluate and return if this is empty

Definition Classes
Option
Annotations
@inline()
See also
toRight
def toList: List[A]

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

Definition Classes
Option
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 information
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]
final def toRight[X](left: ⇒ X): Product with Serializable with Either[X, A]

Returns a Left containing the given argument left if this Option is empty, or a Right containing this Option's value if this is nonempty.
Returns a Left containing the given argument left if this Option is empty, or a Right containing this Option's value if this is nonempty.
left
the expression to evaluate and return if this is empty

Definition Classes
Option
Annotations
@inline()
See also
toLeft
def toSeq: Seq[A]

Converts this option to a sequence.
Converts this option to a sequence. As with toIterable, it's lazy in this default implementation, as this TraversableOnce may be lazy and unevaluated.
returns
a sequence containing all elements of this option.

Implicit information
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
def toSet[B >: A]: Set[B]

Converts this option to a set.
Converts this option to a set.
returns
a set containing all elements of this option.

Implicit information
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
def toStream: Stream[A]

Converts this option to a stream.
Converts this option to a stream.
returns
a stream containing all elements of this option.

Implicit information
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
def toTraversable: Traversable[A]

Converts this option to an unspecified Traversable.
Converts this option to an unspecified Traversable. Will return the same collection if this instance is already Traversable.
returns
a Traversable containing all elements of this option.

Implicit information
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
def transpose[B](implicit asTraversable: (A) ⇒ GenTraversableOnce[B]): Iterable[Iterable[B]]

Transposes this option of traversable collections into a option of options.
Transposes this option of traversable collections into a option of options.
B
the type of the elements of each traversable collection.
asTraversable
an implicit conversion which asserts that the element type of this option is a Traversable.
returns
a two-dimensional option of options which has as nth row the nth column of this option.

Implicit information
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 option are not of the same size.
def unzip[A1, A2](implicit asPair: (A) ⇒ (A1, A2)): (Iterable[A1], Iterable[A2])

Converts this option of pairs into two collections of the first and second half of each pair.
Converts this option of pairs into two collections of the first and second half of each pair.
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 option is a pair.
returns
a pair options, containing the first, respectively second half of each element pair of this option.

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

Converts this option of triples into three collections of the first, second, and third element of each triple.
Converts this option of triples into three collections of the first, second, and third element of each triple.
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 option is a triple.
returns
a triple options, containing the first, second, respectively third member of each element triple of this option.

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

Creates a non-strict view of a slice of this option.
Creates a non-strict view of a slice of this option.
Note: the difference between view and slice is that view produces a view of the current option, whereas slice produces a new option.
Note: view(from, to) is equivalent to view.slice(from, to)
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 option, starting at index from and extending up to (but not including) index until.

Implicit information
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
def view: IterableView[A, Iterable[A]]

Creates a non-strict view of this option.
Creates a non-strict view of this option.
returns
a non-strict view of this option.

Implicit information
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
final def wait(): Unit

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

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

Definition Classes
AnyRef
Annotations
@throws()
def withFilter(p: (A) ⇒ Boolean): WithFilter

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

Definition Classes
Option
val x: A
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 information
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[Iterable[A], (A1, B), That]): That
def zipAll[B](that: 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 information
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[Iterable[A], (A1, B), That]): That
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. @example List("a", "b", "c").zipWithIndex = List(("a", 0), ("b", 1), ("c", 2))

Implicit information
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[Iterable[A], (A1, Int), That]): That
def →[B](y: B): (Some[A], B)

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

Deprecated Value Members

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

A syntactic sugar for out of order folding.
A syntactic sugar for out of order folding. See fold.
Example:
```
scala> val a = LinkedList(1,2,3,4)
a: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2, 3, 4)

scala> val b = (a /:\ 5)(_+_)
b: Int = 15
```
Implicit information
This member is added by an implicit conversion from Some[A] to Iterable[A] performed by method option2Iterable in scala.Option.
Definition Classes
GenTraversableOnce
Annotations
@deprecated
Deprecated
(Since version 2.10.0) use fold instead

Inherited from Option[A]

Inherited from 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 StringAdd

Inherited by implicit conversion any2stringfmt from Some[A] to StringFormat

Inherited by implicit conversion any2ArrowAssoc from Some[A] to ArrowAssoc[Some[A]]

Inherited by implicit conversion any2Ensuring from Some[A] to Ensuring[Some[A]]

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

Instance Constructors

new Some(x: A)

Type Members

class WithFilter extends AnyRef

Value Members

final def !=(arg0: AnyRef): Boolean

final def !=(arg0: Any): Boolean

final def ##(): Int

def +(other: String): String

def ++[B](that: GenTraversableOnce[B]): `Option`[B]

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

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

def ++:[B](that: TraversableOnce[B]): `Option`[B]

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

def ->[B](y: B): (Some[A], B)

def /:[B](z: B)(op: (B, A) ⇒ B): B

def :\[B](z: B)(op: (A, B) ⇒ B): B

final def ==(arg0: AnyRef): Boolean

final def ==(arg0: Any): Boolean

def addString(b: StringBuilder): StringBuilder

def addString(b: StringBuilder, sep: String): StringBuilder

def addString(b: StringBuilder, start: String, sep: String, end: String): StringBuilder

def aggregate[B](z: B)(seqop: (B, A) ⇒ B, combop: (B, B) ⇒ B): B

final def asInstanceOf[T0]: T0

def clone(): AnyRef

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

def collect[B](pf: PartialFunction[A, B]): `Option`[B]

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

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

def companion: GenericCompanion[Iterable]

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

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

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

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

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

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

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

def count(p: (A) ⇒ Boolean): Int

def drop(n: Int): Iterable[A]

def dropRight(n: Int): Iterable[A]

def dropWhile(p: (A) ⇒ Boolean): Iterable[A]

def ensuring(cond: (Some[A]) ⇒ Boolean, msg: ⇒ Any): Some[A]

def ensuring(cond: (Some[A]) ⇒ Boolean): Some[A]

def ensuring(cond: Boolean, msg: ⇒ Any): Some[A]

def ensuring(cond: Boolean): Some[A]

final def eq(arg0: AnyRef): Boolean

final def exists(p: (A) ⇒ Boolean): Boolean

final def filter(p: (A) ⇒ Boolean): Option[A]

final def filterNot(p: (A) ⇒ Boolean): Option[A]

def finalize(): Unit

def find(p: (A) ⇒ Boolean): Option[A]

final def flatMap[B](f: (A) ⇒ Option[B]): Option[B]

def flatMap[B](f: (A) ⇒ GenTraversableOnce[B]): `Option`[B]

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

def flatten[B](implicit ev: <:<[A, Option[B]]): Option[B]

def flatten[B]: `Option`[B]

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

final def fold[B](ifEmpty: ⇒ B)(f: (A) ⇒ B): B

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

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

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

final def forall(p: (A) ⇒ Boolean): Boolean

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

def foreach(f: (A) ⇒ Unit): Unit

def foreach[U](f: (A) ⇒ U): Unit

def formatted(fmtstr: String): String

def genericBuilder[B]: Builder[B, Iterable[B]]

def get: A

final def getClass(): Class[_]

final def getOrElse[B >: A](default: ⇒ B): B

def groupBy[K](f: (A) ⇒ K): Map[K, Iterable[A]]

def grouped(size: Int): Iterator[Iterable[A]]

def hasDefiniteSize: Boolean

def head: A

def headOption: Option[A]

def init: Iterable[A]

def inits: Iterator[Iterable[A]]

def isDefined: Boolean