SeqProxyLike

Type Members

type Self = Repr

The type implementing this traversable
The type implementing this traversable

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

A class supporting filtered operations.
A class supporting filtered operations. Instances of this class are returned by method withFilter.

Definition Classes
TraversableLike

Abstract Value Members

abstract def newBuilder: Builder[A, Repr]

Creates a new builder for this collection type.
Creates a new builder for this collection type.

Attributes
protected[this]
Definition Classes
TraversableLike → HasNewBuilder
abstract def self: Repr

Definition Classes
TraversableProxyLike → Proxy
abstract def seq: Seq[A]

Definition Classes
GenSeqLike → Parallelizable → GenTraversableOnce

Concrete Value Members

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
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 SeqProxyLike[A, Repr] to any2stringadd[SeqProxyLike[A, Repr]] performed by method any2stringadd in scala.Predef.
Definition Classes
any2stringadd
def ++[B](that: GenTraversableOnce[B]): Seq[B]

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

scala> val b = List(2)
b: List[Int] = List(2)

scala> val c = a ++ b
c: List[Int] = List(1, 2)

scala> val d = List('a')
d: List[Char] = List(a)

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

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
Full Signature
def ++[B >: A, That](xs: GenTraversableOnce[B])(implicit bf: CanBuildFrom[Repr, B, That]): That
def ++:[B >: A, That](that: Traversable[B])(implicit bf: CanBuildFrom[Repr, B, That]): That

As with ++, returns a new collection containing the elements from the left operand followed by the elements from the right operand.
As with ++, returns a new collection containing the elements from the left operand followed by the elements from the right operand.
It differs from ++ in that the right operand determines the type of the resulting collection rather than the left one. Mnemonic: the COLon is on the side of the new COLlection type.
Example:
```
scala> val x = List(1)
x: List[Int] = List(1)

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

scala> val z = x ++: y
z: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2)
```
This overload exists because: for the implementation of ++: we should reuse that of ++ because many collections override it with more efficient versions.
Since TraversableOnce has no ++ method, we have to implement that directly, but Traversable and down can use the overload.
B
the element type of the returned collection.
That
the class of the returned collection. Where possible, That is the same class as the current collection class Repr, but this depends on the element type B being admissible for that class, which means that an implicit instance of type CanBuildFrom[Repr, B, That] is found.
that
the traversable to append.
bf
an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and and the new element type B.
returns
a new collection of type That which contains all elements of this traversable collection followed by all elements of that.

Definition Classes
TraversableLike
def ++:[B](that: TraversableOnce[B]): Seq[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 sequence which contains all elements of this sequence followed by all elements of that.

Definition Classes
TraversableLike
Full Signature
def ++:[B >: A, That](that: TraversableOnce[B])(implicit bf: CanBuildFrom[Repr, B, That]): That
def +:(elem: A): Seq[A]

[use case] A copy of the sequence with an element prepended.
[use case]
A copy of the sequence with an element prepended.
Note that :-ending operators are right associative (see example). A mnemonic for +: vs. :+ is: the COLon goes on the COLlection side.
Also, the original sequence is not modified, so you will want to capture the result.
Example:
```
scala> val x = List(1)
x: List[Int] = List(1)

scala> val y = 2 +: x
y: List[Int] = List(2, 1)

scala> println(x)
List(1)
```
elem
the prepended element
returns
a new sequence consisting of elem followed by all elements of this sequence.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
Full Signature
def +:[B >: A, That](elem: B)(implicit bf: CanBuildFrom[Repr, B, That]): That
def ->[B](y: B): (SeqProxyLike[A, Repr], B)

Implicit information
This member is added by an implicit conversion from SeqProxyLike[A, Repr] to ArrowAssoc[SeqProxyLike[A, Repr]] performed by method ArrowAssoc 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 traversable collection, going left to right.
Applies a binary operator to a start value and all elements of this traversable 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 traversable 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, ..., x_n are the elements of this traversable collection.
Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def :+(elem: A): Seq[A]

[use case] A copy of this sequence with an element appended.
[use case]
A copy of this sequence with an element appended.
A mnemonic for +: vs. :+ is: the COLon goes on the COLlection side.
Note: will not terminate for infinite-sized collections.
Example:
```
scala> val a = List(1)
a: List[Int] = List(1)

scala> val b = a :+ 2
b: List[Int] = List(1, 2)

scala> println(a)
List(1)
```
elem
the appended element
returns
a new sequence consisting of all elements of this sequence followed by elem.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
Full Signature
def :+[B >: A, That](elem: B)(implicit bf: CanBuildFrom[Repr, B, That]): That
def :\[B](z: B)(op: (A, B) ⇒ B): B

Applies a binary operator to all elements of this traversable collection and a start value, going right to left.
Applies a binary operator to all elements of this traversable 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 traversable 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, ..., x_n are the elements of this traversable collection.
Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
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
def addString(b: mutable.StringBuilder): mutable.StringBuilder

Appends all elements of this traversable collection to a string builder.
Appends all elements of this traversable collection to a string builder. The written text consists of the string representations (w.r.t. the method toString) of all elements of this traversable 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.

Definition Classes
TraversableProxyLike → TraversableOnce
def addString(b: mutable.StringBuilder, sep: String): mutable.StringBuilder

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

Definition Classes
TraversableProxyLike → TraversableOnce
def addString(b: mutable.StringBuilder, start: String, sep: String, end: String): mutable.StringBuilder

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

Definition Classes
TraversableProxyLike → 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 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 traversable or iterator 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

Definition Classes
TraversableOnce → GenTraversableOnce
def apply(idx: Int): A

Selects an element by its index in the sequence.
Selects an element by its index in the sequence.
Example:
```
scala> val x = List(1, 2, 3, 4, 5)
x: List[Int] = List(1, 2, 3, 4, 5)

scala> x(3)
res1: Int = 4
```
idx
The index to select.
returns
the element of this sequence at index idx, where 0 indicates the first element.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
Exceptions thrown
IndexOutOfBoundsException if idx does not satisfy 0 <= idx < length.
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 canEqual(that: Any): Boolean

Method called from equality methods, so that user-defined subclasses can refuse to be equal to other collections of the same kind.
Method called from equality methods, so that user-defined subclasses can refuse to be equal to other collections of the same kind.
that
The object with which this iterable collection should be compared
returns
true, if this iterable collection can possibly equal that, false otherwise. The test takes into consideration only the run-time types of objects but ignores their elements.

Definition Classes
IterableLike → Equals
def clone(): AnyRef

Create a copy of the receiver object.
Create a copy of the receiver object.
The default implementation of the clone method is platform dependent.
returns
a copy of the receiver object.

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
Note
not specified by SLS as a member of AnyRef
def collect[B](pf: PartialFunction[A, B]): Seq[B]

[use case] Builds a new collection by applying a partial function to all elements of this sequence on which the function is defined.
[use case]
Builds a new collection by applying a partial function to all elements of this sequence on which the function is defined.
B
the element type of the returned collection.
pf
the partial function which filters and maps the sequence.
returns
a new sequence resulting from applying the given partial function pf to each element on which it is defined and collecting the results. The order of the elements is preserved.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
Full Signature
def collect[B, That](pf: PartialFunction[A, B])(implicit bf: CanBuildFrom[Repr, B, That]): That
def collectFirst[B](pf: PartialFunction[A, B]): Option[B]

Finds the first element of the traversable or iterator for which the given partial function is defined, and applies the partial function to it.
Finds the first element of the traversable or iterator for which the given partial function is defined, and applies the partial function to it.
Note: may not terminate for infinite-sized collections.
Note: might return different results for different runs, unless the underlying collection type is ordered.
pf
the partial function
returns
an option value containing pf applied to the first value for which it is defined, or None if none exists.
Definition Classes
TraversableOnce
Example:
1. Seq("a", 1, 5L).collectFirst({ case x: Int => x*10 }) = Some(10)
def combinations(n: Int): Iterator[Repr]

Iterates over combinations.
Iterates over combinations. A _combination_ of length n is a subsequence of the original sequence, with the elements taken in order. Thus, "xy" and "yy" are both length-2 combinations of "xyy", but "yx" is not. If there is more than one way to generate the same subsequence, only one will be returned.
For example, "xyyy" has three different ways to generate "xy" depending on whether the first, second, or third "y" is selected. However, since all are identical, only one will be chosen. Which of the three will be taken is an implementation detail that is not defined.
returns
An Iterator which traverses the possible n-element combinations of this sequence.
Definition Classes
SeqLike
Example:
1. "abbbc".combinations(2) = Iterator(ab, ac, bb, bc)
def contains[A1 >: A](elem: A1): Boolean

Tests whether this sequence contains a given value as an element.
Tests whether this sequence contains a given value as an element.
Note: may not terminate for infinite-sized collections.
elem
the element to test.
returns
true if this sequence has an element that is equal (as determined by ==) to elem, false otherwise.

Definition Classes
SeqProxyLike → SeqLike
def containsSlice[B](that: GenSeq[B]): Boolean

Tests whether this sequence contains a given sequence as a slice.
Tests whether this sequence contains a given sequence as a slice.
Note: may not terminate for infinite-sized collections.
that
the sequence to test
returns
true if this sequence contains a slice with the same elements as that, otherwise false.

Definition Classes
SeqProxyLike → SeqLike
def copyToArray(xs: Array[A]): Unit

[use case] Copies the elements of this sequence to an array.
[use case]
Copies the elements of this sequence to an array. Fills the given array xs with values of this sequence. Copying will stop once either the end of the current sequence is reached, or the end of the target array is reached.
Note: will not terminate for infinite-sized collections.
xs
the array to fill.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
Full Signature
def copyToArray[B >: A](xs: Array[B]): Unit
def copyToArray(xs: Array[A], start: Int): Unit

[use case] Copies the elements of this sequence to an array.
[use case]
Copies the elements of this sequence to an array. Fills the given array xs with values of this sequence, beginning at index start. Copying will stop once either the end of the current sequence is reached, or the end of the target array is reached.
Note: will not terminate for infinite-sized collections.
xs
the array to fill.
start
the starting index.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
Full Signature
def copyToArray[B >: A](xs: Array[B], start: Int): Unit
def copyToArray(xs: Array[A], start: Int, len: Int): Unit

[use case] Copies the elements of this sequence to an array.
[use case]
Copies the elements of this sequence to an array. Fills the given array xs with at most len elements of this sequence, starting at position start. Copying will stop once either the end of the current sequence is reached, or the end of the target array is reached, or len elements have been copied.
Note: will not terminate for infinite-sized collections.
xs
the array to fill.
start
the starting index.
len
the maximal number of elements to copy.

Definition Classes
TraversableProxyLike → TraversableLike → TraversableOnce → GenTraversableOnce
Full Signature
def copyToArray[B >: A](xs: Array[B], start: Int, len: Int): Unit
def copyToBuffer[B >: A](dest: Buffer[B]): Unit

Copies all elements of this traversable collection to a buffer.
Copies all elements of this traversable collection to a buffer.
Note: will not terminate for infinite-sized collections.
dest
The buffer to which elements are copied.

Definition Classes
TraversableProxyLike → TraversableOnce
def corresponds[B](that: GenSeq[B])(p: (A, B) ⇒ Boolean): Boolean

Tests whether every element of this sequence relates to the corresponding element of another sequence by satisfying a test predicate.
Tests whether every element of this sequence relates to the corresponding element of another sequence by satisfying a test predicate.
B
the type of the elements of that
that
the other sequence
p
the test predicate, which relates elements from both sequences
returns
true if both sequences have the same length and p(x, y) is true for all corresponding elements x of this sequence and y of that, otherwise false.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
def count(p: (A) ⇒ Boolean): Int

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

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def diff(that: Seq[A]): Seq[A]

[use case] Computes the multiset difference between this sequence and another sequence.
[use case]
Computes the multiset difference between this sequence and another sequence.
Note: will not terminate for infinite-sized collections.
that
the sequence of elements to remove
returns
a new sequence which contains all elements of this sequence except some of occurrences of elements that also appear in that. If an element value x appears n times in that, then the first n occurrences of x will not form part of the result, but any following occurrences will.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
Full Signature
def diff[B >: A](that: GenSeq[B]): Repr
def distinct: Repr

Builds a new sequence from this sequence without any duplicate elements.
Builds a new sequence from this sequence without any duplicate elements.
Note: will not terminate for infinite-sized collections.
returns
A new sequence which contains the first occurrence of every element of this sequence.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
def drop(n: Int): Repr

Selects all elements except first n ones.
Selects all elements except first n ones.
Note: might return different results for different runs, unless the underlying collection type is ordered.
n
the number of elements to drop from this traversable collection.
returns
a traversable collection consisting of all elements of this traversable collection except the first n ones, or else the empty traversable collection, if this traversable collection has less than n elements.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def dropRight(n: Int): Repr

Selects all elements except last n ones.
Selects all elements except last n ones.
Note: might return different results for different runs, unless the underlying collection type is ordered.
n
The number of elements to take
returns
a iterable collection consisting of all elements of this iterable collection except the last n ones, or else the empty iterable collection, if this iterable collection has less than n elements.

Definition Classes
IterableProxyLike → IterableLike
def dropWhile(p: (A) ⇒ Boolean): Repr

Drops longest prefix of elements that satisfy a predicate.
Drops longest prefix of elements that satisfy a predicate.
Note: might return different results for different runs, unless the underlying collection type is ordered.
returns
the longest suffix of this traversable collection whose first element does not satisfy the predicate p.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def endsWith[B](that: GenSeq[B]): Boolean

Tests whether this sequence ends with the given sequence.
Tests whether this sequence ends with the given sequence.
Note: will not terminate for infinite-sized collections.
that
the sequence to test
returns
true if this sequence has that as a suffix, false otherwise.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
def ensuring(cond: (SeqProxyLike[A, Repr]) ⇒ Boolean, msg: ⇒ Any): SeqProxyLike[A, Repr]

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

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

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

Implicit information
This member is added by an implicit conversion from SeqProxyLike[A, Repr] to Ensuring[SeqProxyLike[A, Repr]] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
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
def equals(that: Any): Boolean

Compares the receiver object (this) with the argument object (that) for equivalence.
Compares the receiver object (this) with the argument object (that) for equivalence.
Any implementation of this method should be an equivalence relation:
- It is reflexive: for any instance x of type Any, x.equals(x) should return true.
- It is symmetric: for any instances x and y of type Any, x.equals(y) should return true if and only if y.equals(x) returns true.
- It is transitive: for any instances x, y, and z of type Any if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
If you override this method, you should verify that your implementation remains an equivalence relation. Additionally, when overriding this method it is usually necessary to override hashCode to ensure that objects which are "equal" (o1.equals(o2) returns true) hash to the same scala.Int. (o1.hashCode.equals(o2.hashCode)).
that
the object to compare against this object for equality.
returns
true if the receiver object is equivalent to the argument; false otherwise.

Definition Classes
Proxy → Any
def exists(p: (A) ⇒ Boolean): Boolean

Tests whether a predicate holds for at least one element of this traversable collection.
Tests whether a predicate holds for at least one element of this traversable collection.
Note: may not terminate for infinite-sized collections.
p
the predicate used to test elements.
returns
false if this traversable collection is empty, otherwise true if the given predicate p holds for some of the elements of this traversable collection, otherwise false

Definition Classes
TraversableProxyLike → TraversableLike → TraversableOnce → GenTraversableOnce
def filter(p: (A) ⇒ Boolean): Repr

Selects all elements of this traversable collection which satisfy a predicate.
Selects all elements of this traversable collection which satisfy a predicate.
p
the predicate used to test elements.
returns
a new traversable collection consisting of all elements of this traversable collection that satisfy the given predicate p. The order of the elements is preserved.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def filterNot(p: (A) ⇒ Boolean): Repr

Selects all elements of this traversable collection which do not satisfy a predicate.
Selects all elements of this traversable collection which do not satisfy a predicate.
p
the predicate used to test elements.
returns
a new traversable collection consisting of all elements of this traversable collection that do not satisfy the given predicate p. The order of the elements is preserved.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def finalize(): Unit

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

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

Finds the first element of the traversable collection satisfying a predicate, if any.
Finds the first element of the traversable 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 traversable collection that satisfies p, or None if none exists.

Definition Classes
TraversableProxyLike → TraversableLike → TraversableOnce → GenTraversableOnce
def flatMap[B](f: (A) ⇒ GenTraversableOnce[B]): Seq[B]

[use case] Builds a new collection by applying a function to all elements of this sequence and using the elements of the resulting collections.
[use case]
Builds a new collection by applying a function to all elements of this sequence 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 sequence. 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 sequence resulting from applying the given collection-valued function f to each element of this sequence and concatenating the results.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike → FilterMonadic
Full Signature
def flatMap[B, That](f: (A) ⇒ GenTraversableOnce[B])(implicit bf: CanBuildFrom[Repr, B, That]): That
def fold[A1 >: A](z: A1)(op: (A1, A1) ⇒ A1): A1

Folds the elements of this traversable or iterator using the specified associative binary operator.
Folds the elements of this traversable or iterator 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 traversable or iterator is empty.

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 traversable collection, going left to right.
Applies a binary operator to a start value and all elements of this traversable 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 traversable collection, 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 traversable collection. Returns z if this traversable collection is empty.
Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def foldRight[B](z: B)(op: (A, B) ⇒ B): B

Applies a binary operator to all elements of this traversable collection and a start value, going right to left.
Applies a binary operator to all elements of this traversable 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 traversable 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, ..., x_n are the elements of this traversable collection. Returns z if this traversable collection is empty.
Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def forall(p: (A) ⇒ Boolean): Boolean

Tests whether a predicate holds for all elements of this traversable collection.
Tests whether a predicate holds for all elements of this traversable collection.
Note: may not terminate for infinite-sized collections.
p
the predicate used to test elements.
returns
true if this traversable collection is empty or the given predicate p holds for all elements of this traversable collection, otherwise false.

Definition Classes
TraversableProxyLike → TraversableLike → TraversableOnce → GenTraversableOnce
def foreach(f: (A) ⇒ Unit): Unit

[use case] Applies a function f to all elements of this sequence.
[use case]
Applies a function f to all elements of this sequence.
Note: this method underlies the implementation of most other bulk operations. It's important to implement this method in an efficient way.
f
the function that is applied for its side-effect to every element. The result of function f is discarded.

Definition Classes
TraversableProxyLike → 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 SeqProxyLike[A, Repr] to StringFormat[SeqProxyLike[A, Repr]] performed by method StringFormat in scala.Predef.
Definition Classes
StringFormat
Annotations
@inline()
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
def groupBy[K](f: (A) ⇒ K): immutable.Map[K, Repr]

Partitions this traversable collection into a map of traversable collections according to some discriminator function.
Partitions this traversable collection into a map of traversable 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 traversable collection.
K
the type of keys returned by the discriminator function.
f
the discriminator function.
returns
A map from keys to traversable 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 traversable collection of those elements x for which f(x) equals k.
Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def grouped(size: Int): Iterator[Repr]

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

Definition Classes
IterableProxyLike → IterableLike
See also
scala.collection.Iterator, method grouped
def hasDefiniteSize: Boolean

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

Definition Classes
TraversableProxyLike → TraversableLike → TraversableOnce → GenTraversableOnce
def hashCode(): Int

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

Definition Classes
Proxy → Any
def head: A

Selects the first element of this traversable collection.
Selects the first element of this traversable collection.
Note: might return different results for different runs, unless the underlying collection type is ordered.
returns
the first element of this traversable collection.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
Exceptions thrown
NoSuchElementException if the traversable collection is empty.
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 traversable collection if it is nonempty, None if it is empty.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def indexOf(elem: A, from: Int): Int

[use case] Finds index of first occurrence of some value in this sequence after or at some start index.
[use case]
Finds index of first occurrence of some value in this sequence after or at some start index.
Note: may not terminate for infinite-sized collections.
elem
the element value to search for.
from
the start index
returns
the index >= from of the first element of this sequence that is equal (as determined by ==) to elem, or -1, if none exists.

Definition Classes
SeqProxyLike → GenSeqLike
Full Signature
def indexOf[B >: A](elem: B, from: Int): Int
def indexOf(elem: A): Int

[use case] Finds index of first occurrence of some value in this sequence.
[use case]
Finds index of first occurrence of some value in this sequence.
Note: may not terminate for infinite-sized collections.
elem
the element value to search for.
returns
the index of the first element of this sequence that is equal (as determined by ==) to elem, or -1, if none exists.

Definition Classes
SeqProxyLike → GenSeqLike
Full Signature
def indexOf[B >: A](elem: B): Int
def indexOfSlice[B >: A](that: GenSeq[B], from: Int): Int

Finds first index after or at a start index where this sequence contains a given sequence as a slice.
Finds first index after or at a start index where this sequence contains a given sequence as a slice.
Note: may not terminate for infinite-sized collections.
that
the sequence to test
from
the start index
returns
the first index >= from such that the elements of this sequence starting at this index match the elements of sequence that, or -1 of no such subsequence exists.

Definition Classes
SeqProxyLike → SeqLike
def indexOfSlice[B >: A](that: GenSeq[B]): Int

Finds first index where this sequence contains a given sequence as a slice.
Finds first index where this sequence contains a given sequence as a slice.
Note: may not terminate for infinite-sized collections.
that
the sequence to test
returns
the first index such that the elements of this sequence starting at this index match the elements of sequence that, or -1 of no such subsequence exists.

Definition Classes
SeqProxyLike → SeqLike
def indexWhere(p: (A) ⇒ Boolean, from: Int): Int

Finds index of the first element satisfying some predicate after or at some start index.
Finds index of the first element satisfying some predicate after or at some start index.
Note: may not terminate for infinite-sized collections.
p
the predicate used to test elements.
from
the start index
returns
the index >= from of the first element of this sequence that satisfies the predicate p, or -1, if none exists.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
def indexWhere(p: (A) ⇒ Boolean): Int

Finds index of first element satisfying some predicate.
Finds index of first element satisfying some predicate.
Note: may not terminate for infinite-sized collections.
p
the predicate used to test elements.
returns
the index of the first element of this sequence that satisfies the predicate p, or -1, if none exists.

Definition Classes
SeqProxyLike → GenSeqLike
def indices: Range

Produces the range of all indices of this sequence.
Produces the range of all indices of this sequence.
returns
a Range value from 0 to one less than the length of this sequence.

Definition Classes
SeqProxyLike → SeqLike
def init: Repr

Selects all elements except the last.
Selects all elements except the last.
Note: might return different results for different runs, unless the underlying collection type is ordered.
returns
a traversable collection consisting of all elements of this traversable collection except the last one.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
Exceptions thrown
UnsupportedOperationException if the traversable collection is empty.
def inits: Iterator[Repr]

Iterates over the inits of this traversable collection.
Iterates over the inits of this traversable collection. The first value will be this traversable collection and the final one will be an empty traversable collection, with the intervening values the results of successive applications of init.
returns
an iterator over all the inits of this traversable collection
Definition Classes
TraversableLike
Example:
1. List(1,2,3).inits = Iterator(List(1,2,3), List(1,2), List(1), Nil)
def intersect(that: Seq[A]): Seq[A]

[use case] Computes the multiset intersection between this sequence and another sequence.
[use case]
Computes the multiset intersection between this sequence and another sequence.
Note: may not terminate for infinite-sized collections.
that
the sequence of elements to intersect with.
returns
a new sequence which contains all elements of this sequence which also appear in that. If an element value x appears n times in that, then the first n occurrences of x will be retained in the result, but any following occurrences will be omitted.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
Full Signature
def intersect[B >: A](that: GenSeq[B]): Repr
def isDefinedAt(x: Int): Boolean

Tests whether this sequence contains given index.
Tests whether this sequence contains given index.
The implementations of methods apply and isDefinedAt turn a Seq[A] into a PartialFunction[Int, A].
returns
true if this sequence contains an element at position idx, false otherwise.

Definition Classes
SeqProxyLike → GenSeqLike
def isEmpty: Boolean

Tests whether this traversable collection is empty.
Tests whether this traversable collection is empty.
returns
true if the traversable collection contain no elements, false otherwise.

Definition Classes
TraversableProxyLike → TraversableLike → TraversableOnce → GenTraversableOnce
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 traversable collection can be repeatedly traversed.
Tests whether this traversable collection can be repeatedly traversed.
returns
true

Definition Classes
TraversableLike → GenTraversableLike → GenTraversableOnce
def iterator: Iterator[A]

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

Definition Classes
IterableProxyLike → IterableLike → GenIterableLike
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 traversable collection.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
Exceptions thrown
NoSuchElementException If the traversable collection is empty.
def lastIndexOf(elem: A, end: Int): Int

[use case] Finds index of last occurrence of some value in this sequence before or at a given end index.
[use case]
Finds index of last occurrence of some value in this sequence before or at a given end index.
elem
the element value to search for.
end
the end index.
returns
the index <= end of the last element of this sequence that is equal (as determined by ==) to elem, or -1, if none exists.

Definition Classes
SeqProxyLike → GenSeqLike
Full Signature
def lastIndexOf[B >: A](elem: B, end: Int): Int
def lastIndexOf(elem: A): Int

[use case] Finds index of last occurrence of some value in this sequence.
[use case]
Finds index of last occurrence of some value in this sequence.
Note: will not terminate for infinite-sized collections.
elem
the element value to search for.
returns
the index of the last element of this sequence that is equal (as determined by ==) to elem, or -1, if none exists.

Definition Classes
SeqProxyLike → GenSeqLike
Full Signature
def lastIndexOf[B >: A](elem: B): Int
def lastIndexOfSlice[B >: A](that: GenSeq[B], end: Int): Int

Finds last index before or at a given end index where this sequence contains a given sequence as a slice.
Finds last index before or at a given end index where this sequence contains a given sequence as a slice.
that
the sequence to test
end
the end index
returns
the last index <= end such that the elements of this sequence starting at this index match the elements of sequence that, or -1 of no such subsequence exists.

Definition Classes
SeqProxyLike → SeqLike
def lastIndexOfSlice[B >: A](that: GenSeq[B]): Int

Finds last index where this sequence contains a given sequence as a slice.
Finds last index where this sequence contains a given sequence as a slice.
Note: will not terminate for infinite-sized collections.
that
the sequence to test
returns
the last index such that the elements of this sequence starting a this index match the elements of sequence that, or -1 of no such subsequence exists.

Definition Classes
SeqProxyLike → SeqLike
def lastIndexWhere(p: (A) ⇒ Boolean, end: Int): Int

Finds index of last element satisfying some predicate before or at given end index.
Finds index of last element satisfying some predicate before or at given end index.
p
the predicate used to test elements.
returns
the index <= end of the last element of this sequence that satisfies the predicate p, or -1, if none exists.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
def lastIndexWhere(p: (A) ⇒ Boolean): Int

Finds index of last element satisfying some predicate.
Finds index of last element satisfying some predicate.
Note: will not terminate for infinite-sized collections.
p
the predicate used to test elements.
returns
the index of the last element of this sequence that satisfies the predicate p, or -1, if none exists.

Definition Classes
SeqProxyLike → GenSeqLike
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 traversable collection$ if it is nonempty, None if it is empty.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def length: Int

The length of the sequence.
The length of the sequence.
Note: will not terminate for infinite-sized collections.
Note: xs.length and xs.size yield the same result.
returns
the number of elements in this sequence.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
def lengthCompare(len: Int): Int

Compares the length of this sequence to a test value.
Compares the length of this sequence to a test value.
len
the test value that gets compared with the length.
returns
A value x where
```
x <  0       if this.length <  len
x == 0       if this.length == len
x >  0       if this.length >  len
```
The method as implemented here does not call length directly; its running time is O(length min len) instead of O(length). The method should be overwritten if computing length is cheap.
Definition Classes
SeqProxyLike → SeqLike
def map[B](f: (A) ⇒ B): Seq[B]

[use case] Builds a new collection by applying a function to all elements of this sequence.
[use case]
Builds a new collection by applying a function to all elements of this sequence.
B
the element type of the returned collection.
f
the function to apply to each element.
returns
a new sequence resulting from applying the given function f to each element of this sequence and collecting the results.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike → FilterMonadic
Full Signature
def map[B, That](f: (A) ⇒ B)(implicit bf: CanBuildFrom[Repr, B, That]): That
def max: A

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

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
Full Signature
def max[B >: A](implicit cmp: Ordering[B]): A
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 sequence with the largest value measured by function f.

Definition Classes
TraversableOnce → GenTraversableOnce
Full Signature
def maxBy[B](f: (A) ⇒ B)(implicit cmp: Ordering[B]): A
def min: A

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

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
Full Signature
def min[B >: A](implicit cmp: Ordering[B]): A
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 sequence with the smallest value measured by function f.

Definition Classes
TraversableOnce → GenTraversableOnce
Full Signature
def minBy[B](f: (A) ⇒ B)(implicit cmp: Ordering[B]): A
def mkString: String

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

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def mkString(sep: String): String

Displays all elements of this traversable collection in a string using a separator string.
Displays all elements of this traversable collection in a string using a separator string.
sep
the separator string.
returns
a string representation of this traversable collection. In the resulting string the string representations (w.r.t. the method toString) of all elements of this traversable collection are separated by the string sep.
Definition Classes
TraversableProxyLike → 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 traversable collection in a string using start, end, and separator strings.
Displays all elements of this traversable 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 traversable 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 traversable collection are separated by the string sep.
Definition Classes
TraversableProxyLike → 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
def nonEmpty: Boolean

Tests whether the traversable collection is not empty.
Tests whether the traversable collection is not empty.
returns
true if the traversable collection contains at least one element, false otherwise.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
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
def padTo(len: Int, elem: A): Seq[A]

[use case] A copy of this sequence with an element value appended until a given target length is reached.
[use case]
A copy of this sequence with an element value appended until a given target length is reached.
len
the target length
elem
the padding value
returns
a new sequence consisting of all elements of this sequence followed by the minimal number of occurrences of elem so that the resulting sequence has a length of at least len.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
Full Signature
def padTo[B >: A, That](len: Int, elem: B)(implicit bf: CanBuildFrom[Repr, B, That]): That
def par: ParSeq[A]

Returns a parallel implementation of this collection.
Returns a parallel implementation of this collection.
For most collection types, this method creates a new parallel collection by copying all the elements. For these collection, par takes linear time. Mutable collections in this category do not produce a mutable parallel collection that has the same underlying dataset, so changes in one collection will not be reflected in the other one.
Specific collections (e.g. ParArray or mutable.ParHashMap) override this default behaviour by creating a parallel collection which shares the same underlying dataset. For these collections, par takes constant or sublinear time.
All parallel collections return a reference to themselves.
returns
a parallel implementation of this collection

Definition Classes
Parallelizable
def parCombiner: Combiner[A, ParSeq[A]]

The default par implementation uses the combiner provided by this method to create a new parallel collection.
The default par implementation uses the combiner provided by this method to create a new parallel collection.
returns
a combiner for the parallel collection of type ParRepr

Attributes
protected[this]
Definition Classes
SeqLike → TraversableLike → Parallelizable
def partition(p: (A) ⇒ Boolean): (Repr, Repr)

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

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def patch(from: Int, that: GenSeq[A], replaced: Int): Seq[A]

[use case] Produces a new sequence where a slice of elements in this sequence is replaced by another sequence.
[use case]
Produces a new sequence where a slice of elements in this sequence is replaced by another sequence.
from
the index of the first replaced element
replaced
the number of elements to drop in the original sequence
returns
a new sequence consisting of all elements of this sequence except that replaced elements starting from from are replaced by patch.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
Full Signature
def patch[B >: A, That](from: Int, patch: GenSeq[B], replaced: Int)(implicit bf: CanBuildFrom[Repr, B, That]): That
def permutations: Iterator[Repr]

Iterates over distinct permutations.
Iterates over distinct permutations.
returns
An Iterator which traverses the distinct permutations of this sequence.
Definition Classes
SeqLike
Example:
1. "abb".permutations = Iterator(abb, bab, bba)
def prefixLength(p: (A) ⇒ Boolean): Int

Returns the length of the longest prefix whose elements all satisfy some predicate.
Returns the length of the longest prefix whose elements all satisfy some predicate.
Note: may not terminate for infinite-sized collections.
p
the predicate used to test elements.
returns
the length of the longest prefix of this sequence such that every element of the segment satisfies the predicate p.

Definition Classes
SeqProxyLike → GenSeqLike
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 sequence 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 sequence and as result type of product. Examples of such types are: Long, Float, Double, BigInt.

Definition Classes
TraversableProxyLike → 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 traversable or iterator using the specified associative binary operator.
Reduces the elements of this traversable or iterator 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 traversable or iterator is nonempty.

Definition Classes
TraversableOnce → GenTraversableOnce
Exceptions thrown
UnsupportedOperationException if this traversable or iterator is empty.
def reduceLeft[B >: A](op: (B, A) ⇒ B): B

Applies a binary operator to all elements of this traversable collection, going left to right.
Applies a binary operator to all elements of this traversable 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 traversable collection, going left to right:
```
op( op( ... op(x_1, x_2) ..., x_{n-1}), x_n)
```
where x₁, ..., x_n are the elements of this traversable collection.
Definition Classes
TraversableProxyLike → TraversableOnce
Exceptions thrown
UnsupportedOperationException if this traversable collection is empty.
def reduceLeftOption[B >: A](op: (B, A) ⇒ B): Option[B]

Optionally applies a binary operator to all elements of this traversable collection, going left to right.
Optionally applies a binary operator to all elements of this traversable 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 traversable collection is nonempty, None otherwise.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def reduceOption[A1 >: A](op: (A1, A1) ⇒ A1): Option[A1]

Reduces the elements of this traversable or iterator, if any, using the specified associative binary operator.
Reduces the elements of this traversable or iterator, if any, using the specified associative binary operator.
The order in which operations are performed on elements is unspecified and may be nondeterministic.
A1
A type parameter for the binary operator, a supertype of A.
op
A binary operator that must be associative.
returns
An option value containing result of applying reduce operator op between all the elements if the collection is nonempty, and None otherwise.

Definition Classes
TraversableOnce → GenTraversableOnce
def reduceRight[B >: A](op: (A, B) ⇒ B): B

Applies a binary operator to all elements of this traversable collection, going right to left.
Applies a binary operator to all elements of this traversable 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 traversable collection, 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 traversable collection.
Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
Exceptions thrown
UnsupportedOperationException if this traversable collection is empty.
def reduceRightOption[B >: A](op: (A, B) ⇒ B): Option[B]

Optionally applies a binary operator to all elements of this traversable collection, going right to left.
Optionally applies a binary operator to all elements of this traversable 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 traversable collection is nonempty, None otherwise.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def repr: Repr

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

Definition Classes
TraversableLike → GenTraversableLike
def reverse: Repr

Returns new sequence with elements in reversed order.
Returns new sequence with elements in reversed order.
Note: will not terminate for infinite-sized collections.
returns
A new sequence with all elements of this sequence in reversed order.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
def reverseIterator: Iterator[A]

An iterator yielding elements in reversed order.
An iterator yielding elements in reversed order.
Note: will not terminate for infinite-sized collections.
Note: xs.reverseIterator is the same as xs.reverse.iterator but might be more efficient.
returns
an iterator yielding the elements of this sequence in reversed order

Definition Classes
SeqProxyLike → SeqLike
def reverseMap[B](f: (A) ⇒ B): Seq[B]

[use case] Builds a new collection by applying a function to all elements of this sequence and collecting the results in reversed order.
[use case]
Builds a new collection by applying a function to all elements of this sequence and collecting the results in reversed order.
Note: will not terminate for infinite-sized collections.
Note: xs.reverseMap(f) is the same as xs.reverse.map(f) but might be more efficient.
B
the element type of the returned collection.
f
the function to apply to each element.
returns
a new sequence resulting from applying the given function f to each element of this sequence and collecting the results in reversed order.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
Full Signature
def reverseMap[B, That](f: (A) ⇒ B)(implicit bf: CanBuildFrom[Repr, B, That]): That
def reversed: List[A]

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

[use case] Checks if the other iterable collection contains the same elements in the same order as this sequence.
[use case]
Checks if the other iterable collection contains the same elements in the same order as this sequence.
Note: will not terminate for infinite-sized collections.
that
the collection to compare with.
returns
true, if both collections contain the same elements in the same order, false otherwise.

Definition Classes
IterableProxyLike → 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[Repr, B, That]): That

Computes a prefix scan of the elements of the collection.
Computes a prefix scan of the elements of the collection.
Note: The neutral element z may be applied more than once.
B
element type of the resulting collection
That
type of the resulting collection
z
neutral element for the operator op
op
the associative operator for the scan
cbf
combiner factory which provides a combiner
returns
a new traversable collection containing the prefix scan of the elements in this traversable collection

Definition Classes
TraversableLike → GenTraversableLike
def scanLeft[B, That](z: B)(op: (B, A) ⇒ B)(implicit bf: CanBuildFrom[Repr, B, That]): That

Produces a collection containing cumulative results of applying the operator going left to right.
Produces a collection containing cumulative results of applying the operator going left to right.
Note: will not terminate for infinite-sized collections.
Note: might return different results for different runs, unless the underlying collection type is ordered.
B
the type of the elements in the resulting collection
That
the actual type of the resulting collection
z
the initial value
op
the binary operator applied to the intermediate result and the element
bf
an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and and the new element type B.
returns
collection with intermediate results

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def scanRight[B, That](z: B)(op: (A, B) ⇒ B)(implicit bf: CanBuildFrom[Repr, B, That]): That

Produces a collection containing cumulative results of applying the operator going right to left.
Produces a collection containing cumulative results of applying the operator going right to left. The head of the collection is the last cumulative result.
Note: will not terminate for infinite-sized collections.
Note: might return different results for different runs, unless the underlying collection type is ordered.
Example:
```
List(1, 2, 3, 4).scanRight(0)(_ + _) == List(10, 9, 7, 4, 0)
```
B
the type of the elements in the resulting collection
That
the actual type of the resulting collection
z
the initial value
op
the binary operator applied to the intermediate result and the element
bf
an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and and the new element type B.
returns
collection with intermediate results

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def segmentLength(p: (A) ⇒ Boolean, from: Int): Int

Computes length of longest segment whose elements all satisfy some predicate.
Computes length of longest segment whose elements all satisfy some predicate.
Note: may not terminate for infinite-sized collections.
p
the predicate used to test elements.
from
the index where the search starts.
returns
the length of the longest segment of this sequence starting from index from such that every element of the segment satisfies the predicate p.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
def size: Int

The size of this sequence.
The size of this sequence.
Note: will not terminate for infinite-sized collections.
returns
the number of elements in this sequence.

Definition Classes
SeqProxyLike → TraversableProxyLike → SeqLike → GenTraversableLike → TraversableOnce → GenTraversableOnce
def slice(from: Int, until: Int): Repr

Selects an interval of elements.
Selects an interval of elements. The returned collection is made up of all elements x which satisfy the invariant:
```
from <= indexOf(x) < until
```
Note: might return different results for different runs, unless the underlying collection type is ordered.
returns
a traversable collection containing the elements greater than or equal to index from extending up to (but not including) index until of this traversable collection.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def sliding(size: Int, step: Int): Iterator[Repr]

Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.)
Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.)
size
the number of elements per group
step
the distance between the first elements of successive groups
returns
An iterator producing iterable collections of size size, except the last and the only element will be truncated if there are fewer elements than size.

Definition Classes
IterableProxyLike → IterableLike
See also
scala.collection.Iterator, method sliding
def sliding(size: Int): Iterator[Repr]

Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.) "Sliding window" step is 1 by default.
Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.) "Sliding window" step is 1 by default.
size
the number of elements per group
returns
An iterator producing iterable collections of size size, except the last and the only element will be truncated if there are fewer elements than size.

Definition Classes
IterableProxyLike → IterableLike
See also
scala.collection.Iterator, method sliding
def sortBy[B](f: (A) ⇒ B)(implicit ord: Ordering[B]): Repr

Sorts this Seq according to the Ordering which results from transforming an implicitly given Ordering with a transformation function.
Sorts this Seq according to the Ordering which results from transforming an implicitly given Ordering with a transformation function.
B
the target type of the transformation f, and the type where the ordering ord is defined.
f
the transformation function mapping elements to some other domain B.
ord
the ordering assumed on domain B.
returns
a sequence consisting of the elements of this sequence sorted according to the ordering where x < y if ord.lt(f(x), f(y)).
Definition Classes
SeqProxyLike → SeqLike
Example:
1. val words = "The quick brown fox jumped over the lazy dog".split(' ') // this works because scala.Ordering will implicitly provide an Ordering[Tuple2[Int, Char]] words.sortBy(x => (x.length, x.head)) res0: Array[String] = Array(The, dog, fox, the, lazy, over, brown, quick, jumped)
See also
scala.math.Ordering Note: will not terminate for infinite-sized collections.
def sortWith(lt: (A, A) ⇒ Boolean): Repr

Sorts this sequence according to a comparison function.
Sorts this sequence according to a comparison function.
Note: will not terminate for infinite-sized collections.
The sort is stable. That is, elements that are equal (as determined by lt) appear in the same order in the sorted sequence as in the original.
lt
the comparison function which tests whether its first argument precedes its second argument in the desired ordering.
returns
a sequence consisting of the elements of this sequence sorted according to the comparison function lt.
Definition Classes
SeqProxyLike → SeqLike
Example:
1. List("Steve", "Tom", "John", "Bob").sortWith(_.compareTo(_) < 0) = List("Bob", "John", "Steve", "Tom")
def sorted[B >: A](implicit ord: Ordering[B]): Repr

Sorts this sequence according to an Ordering.
Sorts this sequence according to an Ordering.
The sort is stable. That is, elements that are equal (as determined by lt) appear in the same order in the sorted sequence as in the original.
ord
the ordering to be used to compare elements.
returns
a sequence consisting of the elements of this sequence sorted according to the ordering ord.

Definition Classes
SeqProxyLike → SeqLike
See also
scala.math.Ordering
def span(p: (A) ⇒ Boolean): (Repr, Repr)

Splits this traversable collection into a prefix/suffix pair according to a predicate.
Splits this traversable 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 traversable collection whose elements all satisfy p, and the rest of this traversable collection.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def splitAt(n: Int): (Repr, Repr)

Splits this traversable collection into two at a given position.
Splits this traversable 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 traversable collections consisting of the first n elements of this traversable collection, and the other elements.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def startsWith[B](that: GenSeq[B]): Boolean

Tests whether this sequence starts with the given sequence.
Tests whether this sequence starts with the given sequence.
that
the sequence to test
returns
true if this collection has that as a prefix, false otherwise.

Definition Classes
SeqProxyLike → GenSeqLike
def startsWith[B](that: GenSeq[B], offset: Int): Boolean

Tests whether this sequence contains the given sequence at a given index.
Tests whether this sequence contains the given sequence at a given index.
Note: If the both the receiver object this and the argument that are infinite sequences this method may not terminate.
that
the sequence to test
offset
the index where the sequence is searched.
returns
true if the sequence that is contained in this sequence at index offset, otherwise false.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
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 traversable collection. By default the string prefix is the simple name of the collection class traversable collection.

Definition Classes
TraversableProxyLike → 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 sequence 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 sequence and as result type of sum. Examples of such types are: Long, Float, Double, BigInt.

Definition Classes
TraversableProxyLike → 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: Repr

Selects all elements except the first.
Selects all elements except the first.
Note: might return different results for different runs, unless the underlying collection type is ordered.
returns
a traversable collection consisting of all elements of this traversable collection except the first one.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
Exceptions thrown
`UnsupportedOperationException` if the traversable collection is empty.
def tails: Iterator[Repr]

Iterates over the tails of this traversable collection.
Iterates over the tails of this traversable collection. The first value will be this traversable collection and the final one will be an empty traversable collection, with the intervening values the results of successive applications of tail.
returns
an iterator over all the tails of this traversable collection
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): Repr

Selects first n elements.
Selects first n elements.
Note: might return different results for different runs, unless the underlying collection type is ordered.
n
the number of elements to take from this traversable collection.
returns
a traversable collection consisting only of the first n elements of this traversable collection, or else the whole traversable collection, if it has less than n elements.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def takeRight(n: Int): Repr

Selects last n elements.
Selects last n elements.
Note: might return different results for different runs, unless the underlying collection type is ordered.
n
the number of elements to take
returns
a iterable collection consisting only of the last n elements of this iterable collection, or else the whole iterable collection, if it has less than n elements.

Definition Classes
IterableProxyLike → IterableLike
def takeWhile(p: (A) ⇒ Boolean): Repr

Takes longest prefix of elements that satisfy a predicate.
Takes longest prefix of elements that satisfy a predicate.
Note: might return different results for different runs, unless the underlying collection type is ordered.
returns
the longest prefix of this traversable collection whose elements all satisfy the predicate p.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def thisCollection: Seq[A]

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

Attributes
protected[this]
Definition Classes
SeqLike → IterableLike → TraversableLike
def to[Col[_]]: Col[A]

[use case] Converts this sequence into another by copying all elements.
[use case]
Converts this sequence into another by copying all elements.
Note: will not terminate for infinite-sized collections.
Col
The collection type to build.
returns
a new collection containing all elements of this sequence.

Definition Classes
TraversableLike → TraversableOnce → GenTraversableOnce
Full Signature
def to[Col[_]](implicit cbf: CanBuildFrom[Nothing, A, Col[A]]): Col[A]
def toArray: Array[A]

[use case] Converts this sequence to an array.
[use case]
Converts this sequence to an array.
Note: will not terminate for infinite-sized collections.
returns
an array containing all elements of this sequence. An ClassTag must be available for the element type of this sequence.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
Full Signature
def toArray[B >: A](implicit arg0: ClassTag[B]): Array[B]
def toBuffer[B >: A]: Buffer[B]

Uses the contents of this traversable collection to create a new mutable buffer.
Uses the contents of this traversable collection to create a new mutable buffer.
Note: will not terminate for infinite-sized collections.
returns
a buffer containing all elements of this traversable collection.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def toCollection(repr: Repr): Seq[A]

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

Attributes
protected[this]
Definition Classes
SeqLike → IterableLike → TraversableLike
def toIndexedSeq: immutable.IndexedSeq[A]

Converts this traversable collection to an indexed sequence.
Converts this traversable collection to an indexed sequence.
Note: will not terminate for infinite-sized collections.
returns
an indexed sequence containing all elements of this traversable collection.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def toIterable: Iterable[A]

Converts this traversable collection to an iterable collection.
Converts this traversable collection to an iterable collection. Note that the choice of target Iterable is lazy in this default implementation as this TraversableOnce may be lazy and unevaluated (i.e. it may be an iterator which is only traversable once).
Note: will not terminate for infinite-sized collections.
returns
an Iterable containing all elements of this traversable collection.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def toIterator: Iterator[A]

Returns an Iterator over the elements in this traversable collection.
Returns an Iterator over the elements in this traversable collection. Will return the same Iterator if this instance is already an Iterator.
Note: will not terminate for infinite-sized collections.
returns
an Iterator containing all elements of this traversable collection.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableOnce
def toList: List[A]

Converts this traversable collection to a list.
Converts this traversable collection to a list.
Note: will not terminate for infinite-sized collections.
returns
a list containing all elements of this traversable collection.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def toMap[T, U]: Map[T, U]

[use case] Converts this sequence to a map.
[use case]
Converts this sequence to a map. This method is unavailable unless the elements are members of Tuple2, each ((T, U)) becoming a key-value pair in the map. Duplicate keys will be overwritten by later keys: if this is an unordered collection, which key is in the resulting map is undefined.
Note: will not terminate for infinite-sized collections.
returns
a map of type immutable.Map[T, U] containing all key/value pairs of type (T, U) of this sequence.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
Full Signature
def toMap[T, U](implicit ev: <:<[A, (T, U)]): immutable.Map[T, U]
def toParArray: ParArray[T]

Implicit information
This member is added by an implicit conversion from SeqProxyLike[A, Repr] to CollectionsHaveToParArray[SeqProxyLike[A, Repr], T] performed by method CollectionsHaveToParArray in scala.collection.parallel. This conversion will take place only if an implicit value of type (SeqProxyLike[A, Repr]) ⇒ GenTraversableOnce[T] is in scope.
Definition Classes
CollectionsHaveToParArray
def toSeq: Seq[A]

Converts this sequence to a sequence.
Converts this sequence 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 sequence.

Definition Classes
SeqProxyLike → TraversableProxyLike → SeqLike → GenSeqLike → TraversableOnce → GenTraversableOnce
def toSet[B >: A]: immutable.Set[B]

Converts this traversable collection to a set.
Converts this traversable collection to a set.
Note: will not terminate for infinite-sized collections.
returns
a set containing all elements of this traversable collection.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def toStream: Stream[A]

Converts this traversable collection to a stream.
Converts this traversable collection to a stream.
returns
a stream containing all elements of this traversable collection.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableOnce
def toString(): String

Returns a string representation of the object.
Returns a string representation of the object.
The default representation is platform dependent.
returns
a string representation of the object.

Definition Classes
Proxy → Any
def toTraversable: Traversable[A]

Converts this traversable collection to an unspecified Traversable.
Converts this traversable 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 traversable collection.

Definition Classes
TraversableProxyLike → TraversableLike → TraversableOnce → GenTraversableOnce
def toVector: Vector[A]

Converts this traversable or iterator to a Vector.
Converts this traversable or iterator to a Vector.
Note: will not terminate for infinite-sized collections.
returns
a vector containing all elements of this traversable or iterator.

Definition Classes
TraversableOnce → GenTraversableOnce
def union(that: Seq[A]): Seq[A]

[use case] Produces a new sequence which contains all elements of this sequence and also all elements of a given sequence.
[use case]
Produces a new sequence which contains all elements of this sequence and also all elements of a given sequence. xs union ys is equivalent to xs ++ ys.
Another way to express this is that xs union ys computes the order-preserving multi-set union of xs and ys. union is hence a counter-part of diff and intersect which also work on multi-sets.
Note: will not terminate for infinite-sized collections.
that
the sequence to add.
returns
a new sequence which contains all elements of this sequence followed by all elements of that.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
Full Signature
def union[B >: A, That](that: GenSeq[B])(implicit bf: CanBuildFrom[Repr, B, That]): That
def updated(index: Int, elem: A): Seq[A]

[use case] A copy of this sequence with one single replaced element.
[use case]
A copy of this sequence with one single replaced element.
index
the position of the replacement
elem
the replacing element
returns
a copy of this sequence with the element at position index replaced by elem.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
Full Signature
def updated[B >: A, That](index: Int, elem: B)(implicit bf: CanBuildFrom[Repr, B, That]): That
def view(from: Int, until: Int): SeqView[A, Repr]

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

Definition Classes
SeqProxyLike → IterableProxyLike → TraversableProxyLike → SeqLike → IterableLike → TraversableLike
def view: SeqView[A, Repr]

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

Definition Classes
SeqProxyLike → IterableProxyLike → TraversableProxyLike → SeqLike → 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): FilterMonadic[A, Repr]

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

Definition Classes
TraversableLike → FilterMonadic
def zip[B](that: GenIterable[B]): Seq[(A, B)]

[use case] Returns a sequence formed from this sequence and another iterable collection by combining corresponding elements in pairs.
[use case]
Returns a sequence formed from this sequence 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 sequence containing pairs consisting of corresponding elements of this sequence and that. The length of the returned collection is the minimum of the lengths of this sequence and that.

Definition Classes
IterableProxyLike → IterableLike → GenIterableLike
Full Signature
def zip[A1 >: A, B, That](that: GenIterable[B])(implicit bf: CanBuildFrom[Repr, (A1, B), That]): That
def zipAll[B](that: Iterable[B], thisElem: A, thatElem: B): Seq[(A, B)]

[use case] Returns a sequence formed from this sequence and another iterable collection by combining corresponding elements in pairs.
[use case]
Returns a sequence formed from this sequence 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 sequence is shorter than that.
thatElem
the element to be used to fill up the result if that is shorter than this sequence.
returns
a new sequence containing pairs consisting of corresponding elements of this sequence and that. The length of the returned collection is the maximum of the lengths of this sequence and that. If this sequence is shorter than that, thisElem values are used to pad the result. If that is shorter than this sequence, thatElem values are used to pad the result.

Definition Classes
IterableProxyLike → IterableLike → GenIterableLike
Full Signature
def zipAll[B, A1 >: A, That](that: GenIterable[B], thisElem: A1, thatElem: B)(implicit bf: CanBuildFrom[Repr, (A1, B), That]): That
def zipWithIndex: Seq[(A, Int)]

[use case] Zips this sequence with its indices.
[use case]
Zips this sequence with its indices.
returns
A new sequence containing pairs consisting of all elements of this sequence paired with their index. Indices start at 0.
Definition Classes
IterableProxyLike → IterableLike → GenIterableLike
Full Signature
def zipWithIndex[A1 >: A, That](implicit bf: CanBuildFrom[Repr, (A1, Int), That]): That
Example:
1. List("a", "b", "c").zipWithIndex = List(("a", 0), ("b", 1), ("c", 2))
def →[B](y: B): (SeqProxyLike[A, Repr], B)

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

Shadowed Implicit Value Members

def filter(p: (A) ⇒ Boolean): TraversableOnce[A]
Implicit information
This member is added by an implicit conversion from SeqProxyLike[A, Repr] to MonadOps[A] performed by method MonadOps in scala.collection.TraversableOnce.
Shadowing
This implicitly inherited member is shadowed by one or more members in this class.
To access this member you can use a type ascription:
(seqProxyLike: MonadOps[A]).filter(p)
Definition Classes
MonadOps
def flatMap[B](f: (A) ⇒ GenTraversableOnce[B]): TraversableOnce[B]
Implicit information
This member is added by an implicit conversion from SeqProxyLike[A, Repr] to MonadOps[A] performed by method MonadOps in scala.collection.TraversableOnce.
Shadowing
This implicitly inherited member is shadowed by one or more members in this class.
To access this member you can use a type ascription:
(seqProxyLike: MonadOps[A]).flatMap(f)
Definition Classes
MonadOps
def map[B](f: (A) ⇒ B): TraversableOnce[B]
Implicit information
This member is added by an implicit conversion from SeqProxyLike[A, Repr] to MonadOps[A] performed by method MonadOps in scala.collection.TraversableOnce.
Shadowing
This implicitly inherited member is shadowed by one or more members in this class.
To access this member you can use a type ascription:
(seqProxyLike: MonadOps[A]).map(f)
Definition Classes
MonadOps
def withFilter(p: (A) ⇒ Boolean): Iterator[A]
Implicit information
This member is added by an implicit conversion from SeqProxyLike[A, Repr] to MonadOps[A] performed by method MonadOps in scala.collection.TraversableOnce.
Shadowing
This implicitly inherited member is shadowed by one or more members in this class.
To access this member you can use a type ascription:
(seqProxyLike: MonadOps[A]).withFilter(p)
Definition Classes
MonadOps

Ungrouped

type Self = Repr

The type implementing this traversable
The type implementing this traversable

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

A class supporting filtered operations.
A class supporting filtered operations. Instances of this class are returned by method withFilter.

Definition Classes
TraversableLike

abstract def newBuilder: Builder[A, Repr]

Creates a new builder for this collection type.
Creates a new builder for this collection type.

Attributes
protected[this]
Definition Classes
TraversableLike → HasNewBuilder
abstract def self: Repr

Definition Classes
TraversableProxyLike → Proxy
abstract def seq: Seq[A]

Definition Classes
GenSeqLike → Parallelizable → GenTraversableOnce
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
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 SeqProxyLike[A, Repr] to any2stringadd[SeqProxyLike[A, Repr]] performed by method any2stringadd in scala.Predef.
Definition Classes
any2stringadd
def ++[B](that: GenTraversableOnce[B]): Seq[B]

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

scala> val b = List(2)
b: List[Int] = List(2)

scala> val c = a ++ b
c: List[Int] = List(1, 2)

scala> val d = List('a')
d: List[Char] = List(a)

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

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
Full Signature
def ++[B >: A, That](xs: GenTraversableOnce[B])(implicit bf: CanBuildFrom[Repr, B, That]): That
def ++:[B >: A, That](that: Traversable[B])(implicit bf: CanBuildFrom[Repr, B, That]): That

As with ++, returns a new collection containing the elements from the left operand followed by the elements from the right operand.
As with ++, returns a new collection containing the elements from the left operand followed by the elements from the right operand.
It differs from ++ in that the right operand determines the type of the resulting collection rather than the left one. Mnemonic: the COLon is on the side of the new COLlection type.
Example:
```
scala> val x = List(1)
x: List[Int] = List(1)

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

scala> val z = x ++: y
z: scala.collection.mutable.LinkedList[Int] = LinkedList(1, 2)
```
This overload exists because: for the implementation of ++: we should reuse that of ++ because many collections override it with more efficient versions.
Since TraversableOnce has no ++ method, we have to implement that directly, but Traversable and down can use the overload.
B
the element type of the returned collection.
That
the class of the returned collection. Where possible, That is the same class as the current collection class Repr, but this depends on the element type B being admissible for that class, which means that an implicit instance of type CanBuildFrom[Repr, B, That] is found.
that
the traversable to append.
bf
an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and and the new element type B.
returns
a new collection of type That which contains all elements of this traversable collection followed by all elements of that.

Definition Classes
TraversableLike
def ++:[B](that: TraversableOnce[B]): Seq[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 sequence which contains all elements of this sequence followed by all elements of that.

Definition Classes
TraversableLike
Full Signature
def ++:[B >: A, That](that: TraversableOnce[B])(implicit bf: CanBuildFrom[Repr, B, That]): That
def +:(elem: A): Seq[A]

[use case] A copy of the sequence with an element prepended.
[use case]
A copy of the sequence with an element prepended.
Note that :-ending operators are right associative (see example). A mnemonic for +: vs. :+ is: the COLon goes on the COLlection side.
Also, the original sequence is not modified, so you will want to capture the result.
Example:
```
scala> val x = List(1)
x: List[Int] = List(1)

scala> val y = 2 +: x
y: List[Int] = List(2, 1)

scala> println(x)
List(1)
```
elem
the prepended element
returns
a new sequence consisting of elem followed by all elements of this sequence.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
Full Signature
def +:[B >: A, That](elem: B)(implicit bf: CanBuildFrom[Repr, B, That]): That
def ->[B](y: B): (SeqProxyLike[A, Repr], B)

Implicit information
This member is added by an implicit conversion from SeqProxyLike[A, Repr] to ArrowAssoc[SeqProxyLike[A, Repr]] performed by method ArrowAssoc 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 traversable collection, going left to right.
Applies a binary operator to a start value and all elements of this traversable 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 traversable 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, ..., x_n are the elements of this traversable collection.
Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def :+(elem: A): Seq[A]

[use case] A copy of this sequence with an element appended.
[use case]
A copy of this sequence with an element appended.
A mnemonic for +: vs. :+ is: the COLon goes on the COLlection side.
Note: will not terminate for infinite-sized collections.
Example:
```
scala> val a = List(1)
a: List[Int] = List(1)

scala> val b = a :+ 2
b: List[Int] = List(1, 2)

scala> println(a)
List(1)
```
elem
the appended element
returns
a new sequence consisting of all elements of this sequence followed by elem.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
Full Signature
def :+[B >: A, That](elem: B)(implicit bf: CanBuildFrom[Repr, B, That]): That
def :\[B](z: B)(op: (A, B) ⇒ B): B

Applies a binary operator to all elements of this traversable collection and a start value, going right to left.
Applies a binary operator to all elements of this traversable 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 traversable 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, ..., x_n are the elements of this traversable collection.
Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
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
def addString(b: mutable.StringBuilder): mutable.StringBuilder

Appends all elements of this traversable collection to a string builder.
Appends all elements of this traversable collection to a string builder. The written text consists of the string representations (w.r.t. the method toString) of all elements of this traversable 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.

Definition Classes
TraversableProxyLike → TraversableOnce
def addString(b: mutable.StringBuilder, sep: String): mutable.StringBuilder

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

Definition Classes
TraversableProxyLike → TraversableOnce
def addString(b: mutable.StringBuilder, start: String, sep: String, end: String): mutable.StringBuilder

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

Definition Classes
TraversableProxyLike → 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 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 traversable or iterator 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

Definition Classes
TraversableOnce → GenTraversableOnce
def apply(idx: Int): A

Selects an element by its index in the sequence.
Selects an element by its index in the sequence.
Example:
```
scala> val x = List(1, 2, 3, 4, 5)
x: List[Int] = List(1, 2, 3, 4, 5)

scala> x(3)
res1: Int = 4
```
idx
The index to select.
returns
the element of this sequence at index idx, where 0 indicates the first element.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
Exceptions thrown
IndexOutOfBoundsException if idx does not satisfy 0 <= idx < length.
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 canEqual(that: Any): Boolean

Method called from equality methods, so that user-defined subclasses can refuse to be equal to other collections of the same kind.
Method called from equality methods, so that user-defined subclasses can refuse to be equal to other collections of the same kind.
that
The object with which this iterable collection should be compared
returns
true, if this iterable collection can possibly equal that, false otherwise. The test takes into consideration only the run-time types of objects but ignores their elements.

Definition Classes
IterableLike → Equals
def clone(): AnyRef

Create a copy of the receiver object.
Create a copy of the receiver object.
The default implementation of the clone method is platform dependent.
returns
a copy of the receiver object.

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
Note
not specified by SLS as a member of AnyRef
def collect[B](pf: PartialFunction[A, B]): Seq[B]

[use case] Builds a new collection by applying a partial function to all elements of this sequence on which the function is defined.
[use case]
Builds a new collection by applying a partial function to all elements of this sequence on which the function is defined.
B
the element type of the returned collection.
pf
the partial function which filters and maps the sequence.
returns
a new sequence resulting from applying the given partial function pf to each element on which it is defined and collecting the results. The order of the elements is preserved.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
Full Signature
def collect[B, That](pf: PartialFunction[A, B])(implicit bf: CanBuildFrom[Repr, B, That]): That
def collectFirst[B](pf: PartialFunction[A, B]): Option[B]

Finds the first element of the traversable or iterator for which the given partial function is defined, and applies the partial function to it.
Finds the first element of the traversable or iterator for which the given partial function is defined, and applies the partial function to it.
Note: may not terminate for infinite-sized collections.
Note: might return different results for different runs, unless the underlying collection type is ordered.
pf
the partial function
returns
an option value containing pf applied to the first value for which it is defined, or None if none exists.
Definition Classes
TraversableOnce
Example:
1. Seq("a", 1, 5L).collectFirst({ case x: Int => x*10 }) = Some(10)
def combinations(n: Int): Iterator[Repr]

Iterates over combinations.
Iterates over combinations. A _combination_ of length n is a subsequence of the original sequence, with the elements taken in order. Thus, "xy" and "yy" are both length-2 combinations of "xyy", but "yx" is not. If there is more than one way to generate the same subsequence, only one will be returned.
For example, "xyyy" has three different ways to generate "xy" depending on whether the first, second, or third "y" is selected. However, since all are identical, only one will be chosen. Which of the three will be taken is an implementation detail that is not defined.
returns
An Iterator which traverses the possible n-element combinations of this sequence.
Definition Classes
SeqLike
Example:
1. "abbbc".combinations(2) = Iterator(ab, ac, bb, bc)
def contains[A1 >: A](elem: A1): Boolean

Tests whether this sequence contains a given value as an element.
Tests whether this sequence contains a given value as an element.
Note: may not terminate for infinite-sized collections.
elem
the element to test.
returns
true if this sequence has an element that is equal (as determined by ==) to elem, false otherwise.

Definition Classes
SeqProxyLike → SeqLike
def containsSlice[B](that: GenSeq[B]): Boolean

Tests whether this sequence contains a given sequence as a slice.
Tests whether this sequence contains a given sequence as a slice.
Note: may not terminate for infinite-sized collections.
that
the sequence to test
returns
true if this sequence contains a slice with the same elements as that, otherwise false.

Definition Classes
SeqProxyLike → SeqLike
def copyToArray(xs: Array[A]): Unit

[use case] Copies the elements of this sequence to an array.
[use case]
Copies the elements of this sequence to an array. Fills the given array xs with values of this sequence. Copying will stop once either the end of the current sequence is reached, or the end of the target array is reached.
Note: will not terminate for infinite-sized collections.
xs
the array to fill.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
Full Signature
def copyToArray[B >: A](xs: Array[B]): Unit
def copyToArray(xs: Array[A], start: Int): Unit

[use case] Copies the elements of this sequence to an array.
[use case]
Copies the elements of this sequence to an array. Fills the given array xs with values of this sequence, beginning at index start. Copying will stop once either the end of the current sequence is reached, or the end of the target array is reached.
Note: will not terminate for infinite-sized collections.
xs
the array to fill.
start
the starting index.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
Full Signature
def copyToArray[B >: A](xs: Array[B], start: Int): Unit
def copyToArray(xs: Array[A], start: Int, len: Int): Unit

[use case] Copies the elements of this sequence to an array.
[use case]
Copies the elements of this sequence to an array. Fills the given array xs with at most len elements of this sequence, starting at position start. Copying will stop once either the end of the current sequence is reached, or the end of the target array is reached, or len elements have been copied.
Note: will not terminate for infinite-sized collections.
xs
the array to fill.
start
the starting index.
len
the maximal number of elements to copy.

Definition Classes
TraversableProxyLike → TraversableLike → TraversableOnce → GenTraversableOnce
Full Signature
def copyToArray[B >: A](xs: Array[B], start: Int, len: Int): Unit
def copyToBuffer[B >: A](dest: Buffer[B]): Unit

Copies all elements of this traversable collection to a buffer.
Copies all elements of this traversable collection to a buffer.
Note: will not terminate for infinite-sized collections.
dest
The buffer to which elements are copied.

Definition Classes
TraversableProxyLike → TraversableOnce
def corresponds[B](that: GenSeq[B])(p: (A, B) ⇒ Boolean): Boolean

Tests whether every element of this sequence relates to the corresponding element of another sequence by satisfying a test predicate.
Tests whether every element of this sequence relates to the corresponding element of another sequence by satisfying a test predicate.
B
the type of the elements of that
that
the other sequence
p
the test predicate, which relates elements from both sequences
returns
true if both sequences have the same length and p(x, y) is true for all corresponding elements x of this sequence and y of that, otherwise false.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
def count(p: (A) ⇒ Boolean): Int

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

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def diff(that: Seq[A]): Seq[A]

[use case] Computes the multiset difference between this sequence and another sequence.
[use case]
Computes the multiset difference between this sequence and another sequence.
Note: will not terminate for infinite-sized collections.
that
the sequence of elements to remove
returns
a new sequence which contains all elements of this sequence except some of occurrences of elements that also appear in that. If an element value x appears n times in that, then the first n occurrences of x will not form part of the result, but any following occurrences will.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
Full Signature
def diff[B >: A](that: GenSeq[B]): Repr
def distinct: Repr

Builds a new sequence from this sequence without any duplicate elements.
Builds a new sequence from this sequence without any duplicate elements.
Note: will not terminate for infinite-sized collections.
returns
A new sequence which contains the first occurrence of every element of this sequence.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
def drop(n: Int): Repr

Selects all elements except first n ones.
Selects all elements except first n ones.
Note: might return different results for different runs, unless the underlying collection type is ordered.
n
the number of elements to drop from this traversable collection.
returns
a traversable collection consisting of all elements of this traversable collection except the first n ones, or else the empty traversable collection, if this traversable collection has less than n elements.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def dropRight(n: Int): Repr

Selects all elements except last n ones.
Selects all elements except last n ones.
Note: might return different results for different runs, unless the underlying collection type is ordered.
n
The number of elements to take
returns
a iterable collection consisting of all elements of this iterable collection except the last n ones, or else the empty iterable collection, if this iterable collection has less than n elements.

Definition Classes
IterableProxyLike → IterableLike
def dropWhile(p: (A) ⇒ Boolean): Repr

Drops longest prefix of elements that satisfy a predicate.
Drops longest prefix of elements that satisfy a predicate.
Note: might return different results for different runs, unless the underlying collection type is ordered.
returns
the longest suffix of this traversable collection whose first element does not satisfy the predicate p.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def endsWith[B](that: GenSeq[B]): Boolean

Tests whether this sequence ends with the given sequence.
Tests whether this sequence ends with the given sequence.
Note: will not terminate for infinite-sized collections.
that
the sequence to test
returns
true if this sequence has that as a suffix, false otherwise.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
def ensuring(cond: (SeqProxyLike[A, Repr]) ⇒ Boolean, msg: ⇒ Any): SeqProxyLike[A, Repr]

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

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

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

Implicit information
This member is added by an implicit conversion from SeqProxyLike[A, Repr] to Ensuring[SeqProxyLike[A, Repr]] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
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
def equals(that: Any): Boolean

Compares the receiver object (this) with the argument object (that) for equivalence.
Compares the receiver object (this) with the argument object (that) for equivalence.
Any implementation of this method should be an equivalence relation:
- It is reflexive: for any instance x of type Any, x.equals(x) should return true.
- It is symmetric: for any instances x and y of type Any, x.equals(y) should return true if and only if y.equals(x) returns true.
- It is transitive: for any instances x, y, and z of type Any if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
If you override this method, you should verify that your implementation remains an equivalence relation. Additionally, when overriding this method it is usually necessary to override hashCode to ensure that objects which are "equal" (o1.equals(o2) returns true) hash to the same scala.Int. (o1.hashCode.equals(o2.hashCode)).
that
the object to compare against this object for equality.
returns
true if the receiver object is equivalent to the argument; false otherwise.

Definition Classes
Proxy → Any
def exists(p: (A) ⇒ Boolean): Boolean

Tests whether a predicate holds for at least one element of this traversable collection.
Tests whether a predicate holds for at least one element of this traversable collection.
Note: may not terminate for infinite-sized collections.
p
the predicate used to test elements.
returns
false if this traversable collection is empty, otherwise true if the given predicate p holds for some of the elements of this traversable collection, otherwise false

Definition Classes
TraversableProxyLike → TraversableLike → TraversableOnce → GenTraversableOnce
def filter(p: (A) ⇒ Boolean): Repr

Selects all elements of this traversable collection which satisfy a predicate.
Selects all elements of this traversable collection which satisfy a predicate.
p
the predicate used to test elements.
returns
a new traversable collection consisting of all elements of this traversable collection that satisfy the given predicate p. The order of the elements is preserved.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def filterNot(p: (A) ⇒ Boolean): Repr

Selects all elements of this traversable collection which do not satisfy a predicate.
Selects all elements of this traversable collection which do not satisfy a predicate.
p
the predicate used to test elements.
returns
a new traversable collection consisting of all elements of this traversable collection that do not satisfy the given predicate p. The order of the elements is preserved.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def finalize(): Unit

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

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

Finds the first element of the traversable collection satisfying a predicate, if any.
Finds the first element of the traversable 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 traversable collection that satisfies p, or None if none exists.

Definition Classes
TraversableProxyLike → TraversableLike → TraversableOnce → GenTraversableOnce
def flatMap[B](f: (A) ⇒ GenTraversableOnce[B]): Seq[B]

[use case] Builds a new collection by applying a function to all elements of this sequence and using the elements of the resulting collections.
[use case]
Builds a new collection by applying a function to all elements of this sequence 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 sequence. 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 sequence resulting from applying the given collection-valued function f to each element of this sequence and concatenating the results.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike → FilterMonadic
Full Signature
def flatMap[B, That](f: (A) ⇒ GenTraversableOnce[B])(implicit bf: CanBuildFrom[Repr, B, That]): That
def fold[A1 >: A](z: A1)(op: (A1, A1) ⇒ A1): A1

Folds the elements of this traversable or iterator using the specified associative binary operator.
Folds the elements of this traversable or iterator 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 traversable or iterator is empty.

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 traversable collection, going left to right.
Applies a binary operator to a start value and all elements of this traversable 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 traversable collection, 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 traversable collection. Returns z if this traversable collection is empty.
Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def foldRight[B](z: B)(op: (A, B) ⇒ B): B

Applies a binary operator to all elements of this traversable collection and a start value, going right to left.
Applies a binary operator to all elements of this traversable 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 traversable 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, ..., x_n are the elements of this traversable collection. Returns z if this traversable collection is empty.
Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def forall(p: (A) ⇒ Boolean): Boolean

Tests whether a predicate holds for all elements of this traversable collection.
Tests whether a predicate holds for all elements of this traversable collection.
Note: may not terminate for infinite-sized collections.
p
the predicate used to test elements.
returns
true if this traversable collection is empty or the given predicate p holds for all elements of this traversable collection, otherwise false.

Definition Classes
TraversableProxyLike → TraversableLike → TraversableOnce → GenTraversableOnce
def foreach(f: (A) ⇒ Unit): Unit

[use case] Applies a function f to all elements of this sequence.
[use case]
Applies a function f to all elements of this sequence.
Note: this method underlies the implementation of most other bulk operations. It's important to implement this method in an efficient way.
f
the function that is applied for its side-effect to every element. The result of function f is discarded.

Definition Classes
TraversableProxyLike → 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 SeqProxyLike[A, Repr] to StringFormat[SeqProxyLike[A, Repr]] performed by method StringFormat in scala.Predef.
Definition Classes
StringFormat
Annotations
@inline()
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
def groupBy[K](f: (A) ⇒ K): immutable.Map[K, Repr]

Partitions this traversable collection into a map of traversable collections according to some discriminator function.
Partitions this traversable collection into a map of traversable 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 traversable collection.
K
the type of keys returned by the discriminator function.
f
the discriminator function.
returns
A map from keys to traversable 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 traversable collection of those elements x for which f(x) equals k.
Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def grouped(size: Int): Iterator[Repr]

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

Definition Classes
IterableProxyLike → IterableLike
See also
scala.collection.Iterator, method grouped
def hasDefiniteSize: Boolean

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

Definition Classes
TraversableProxyLike → TraversableLike → TraversableOnce → GenTraversableOnce
def hashCode(): Int

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

Definition Classes
Proxy → Any
def head: A

Selects the first element of this traversable collection.
Selects the first element of this traversable collection.
Note: might return different results for different runs, unless the underlying collection type is ordered.
returns
the first element of this traversable collection.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
Exceptions thrown
NoSuchElementException if the traversable collection is empty.
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 traversable collection if it is nonempty, None if it is empty.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def indexOf(elem: A, from: Int): Int

[use case] Finds index of first occurrence of some value in this sequence after or at some start index.
[use case]
Finds index of first occurrence of some value in this sequence after or at some start index.
Note: may not terminate for infinite-sized collections.
elem
the element value to search for.
from
the start index
returns
the index >= from of the first element of this sequence that is equal (as determined by ==) to elem, or -1, if none exists.

Definition Classes
SeqProxyLike → GenSeqLike
Full Signature
def indexOf[B >: A](elem: B, from: Int): Int
def indexOf(elem: A): Int

[use case] Finds index of first occurrence of some value in this sequence.
[use case]
Finds index of first occurrence of some value in this sequence.
Note: may not terminate for infinite-sized collections.
elem
the element value to search for.
returns
the index of the first element of this sequence that is equal (as determined by ==) to elem, or -1, if none exists.

Definition Classes
SeqProxyLike → GenSeqLike
Full Signature
def indexOf[B >: A](elem: B): Int
def indexOfSlice[B >: A](that: GenSeq[B], from: Int): Int

Finds first index after or at a start index where this sequence contains a given sequence as a slice.
Finds first index after or at a start index where this sequence contains a given sequence as a slice.
Note: may not terminate for infinite-sized collections.
that
the sequence to test
from
the start index
returns
the first index >= from such that the elements of this sequence starting at this index match the elements of sequence that, or -1 of no such subsequence exists.

Definition Classes
SeqProxyLike → SeqLike
def indexOfSlice[B >: A](that: GenSeq[B]): Int

Finds first index where this sequence contains a given sequence as a slice.
Finds first index where this sequence contains a given sequence as a slice.
Note: may not terminate for infinite-sized collections.
that
the sequence to test
returns
the first index such that the elements of this sequence starting at this index match the elements of sequence that, or -1 of no such subsequence exists.

Definition Classes
SeqProxyLike → SeqLike
def indexWhere(p: (A) ⇒ Boolean, from: Int): Int

Finds index of the first element satisfying some predicate after or at some start index.
Finds index of the first element satisfying some predicate after or at some start index.
Note: may not terminate for infinite-sized collections.
p
the predicate used to test elements.
from
the start index
returns
the index >= from of the first element of this sequence that satisfies the predicate p, or -1, if none exists.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
def indexWhere(p: (A) ⇒ Boolean): Int

Finds index of first element satisfying some predicate.
Finds index of first element satisfying some predicate.
Note: may not terminate for infinite-sized collections.
p
the predicate used to test elements.
returns
the index of the first element of this sequence that satisfies the predicate p, or -1, if none exists.

Definition Classes
SeqProxyLike → GenSeqLike
def indices: Range

Produces the range of all indices of this sequence.
Produces the range of all indices of this sequence.
returns
a Range value from 0 to one less than the length of this sequence.

Definition Classes
SeqProxyLike → SeqLike
def init: Repr

Selects all elements except the last.
Selects all elements except the last.
Note: might return different results for different runs, unless the underlying collection type is ordered.
returns
a traversable collection consisting of all elements of this traversable collection except the last one.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
Exceptions thrown
UnsupportedOperationException if the traversable collection is empty.
def inits: Iterator[Repr]

Iterates over the inits of this traversable collection.
Iterates over the inits of this traversable collection. The first value will be this traversable collection and the final one will be an empty traversable collection, with the intervening values the results of successive applications of init.
returns
an iterator over all the inits of this traversable collection
Definition Classes
TraversableLike
Example:
1. List(1,2,3).inits = Iterator(List(1,2,3), List(1,2), List(1), Nil)
def intersect(that: Seq[A]): Seq[A]

[use case] Computes the multiset intersection between this sequence and another sequence.
[use case]
Computes the multiset intersection between this sequence and another sequence.
Note: may not terminate for infinite-sized collections.
that
the sequence of elements to intersect with.
returns
a new sequence which contains all elements of this sequence which also appear in that. If an element value x appears n times in that, then the first n occurrences of x will be retained in the result, but any following occurrences will be omitted.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
Full Signature
def intersect[B >: A](that: GenSeq[B]): Repr
def isDefinedAt(x: Int): Boolean

Tests whether this sequence contains given index.
Tests whether this sequence contains given index.
The implementations of methods apply and isDefinedAt turn a Seq[A] into a PartialFunction[Int, A].
returns
true if this sequence contains an element at position idx, false otherwise.

Definition Classes
SeqProxyLike → GenSeqLike
def isEmpty: Boolean

Tests whether this traversable collection is empty.
Tests whether this traversable collection is empty.
returns
true if the traversable collection contain no elements, false otherwise.

Definition Classes
TraversableProxyLike → TraversableLike → TraversableOnce → GenTraversableOnce
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 traversable collection can be repeatedly traversed.
Tests whether this traversable collection can be repeatedly traversed.
returns
true

Definition Classes
TraversableLike → GenTraversableLike → GenTraversableOnce
def iterator: Iterator[A]

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

Definition Classes
IterableProxyLike → IterableLike → GenIterableLike
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 traversable collection.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
Exceptions thrown
NoSuchElementException If the traversable collection is empty.
def lastIndexOf(elem: A, end: Int): Int

[use case] Finds index of last occurrence of some value in this sequence before or at a given end index.
[use case]
Finds index of last occurrence of some value in this sequence before or at a given end index.
elem
the element value to search for.
end
the end index.
returns
the index <= end of the last element of this sequence that is equal (as determined by ==) to elem, or -1, if none exists.

Definition Classes
SeqProxyLike → GenSeqLike
Full Signature
def lastIndexOf[B >: A](elem: B, end: Int): Int
def lastIndexOf(elem: A): Int

[use case] Finds index of last occurrence of some value in this sequence.
[use case]
Finds index of last occurrence of some value in this sequence.
Note: will not terminate for infinite-sized collections.
elem
the element value to search for.
returns
the index of the last element of this sequence that is equal (as determined by ==) to elem, or -1, if none exists.

Definition Classes
SeqProxyLike → GenSeqLike
Full Signature
def lastIndexOf[B >: A](elem: B): Int
def lastIndexOfSlice[B >: A](that: GenSeq[B], end: Int): Int

Finds last index before or at a given end index where this sequence contains a given sequence as a slice.
Finds last index before or at a given end index where this sequence contains a given sequence as a slice.
that
the sequence to test
end
the end index
returns
the last index <= end such that the elements of this sequence starting at this index match the elements of sequence that, or -1 of no such subsequence exists.

Definition Classes
SeqProxyLike → SeqLike
def lastIndexOfSlice[B >: A](that: GenSeq[B]): Int

Finds last index where this sequence contains a given sequence as a slice.
Finds last index where this sequence contains a given sequence as a slice.
Note: will not terminate for infinite-sized collections.
that
the sequence to test
returns
the last index such that the elements of this sequence starting a this index match the elements of sequence that, or -1 of no such subsequence exists.

Definition Classes
SeqProxyLike → SeqLike
def lastIndexWhere(p: (A) ⇒ Boolean, end: Int): Int

Finds index of last element satisfying some predicate before or at given end index.
Finds index of last element satisfying some predicate before or at given end index.
p
the predicate used to test elements.
returns
the index <= end of the last element of this sequence that satisfies the predicate p, or -1, if none exists.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
def lastIndexWhere(p: (A) ⇒ Boolean): Int

Finds index of last element satisfying some predicate.
Finds index of last element satisfying some predicate.
Note: will not terminate for infinite-sized collections.
p
the predicate used to test elements.
returns
the index of the last element of this sequence that satisfies the predicate p, or -1, if none exists.

Definition Classes
SeqProxyLike → GenSeqLike
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 traversable collection$ if it is nonempty, None if it is empty.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def length: Int

The length of the sequence.
The length of the sequence.
Note: will not terminate for infinite-sized collections.
Note: xs.length and xs.size yield the same result.
returns
the number of elements in this sequence.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
def lengthCompare(len: Int): Int

Compares the length of this sequence to a test value.
Compares the length of this sequence to a test value.
len
the test value that gets compared with the length.
returns
A value x where
```
x <  0       if this.length <  len
x == 0       if this.length == len
x >  0       if this.length >  len
```
The method as implemented here does not call length directly; its running time is O(length min len) instead of O(length). The method should be overwritten if computing length is cheap.
Definition Classes
SeqProxyLike → SeqLike
def map[B](f: (A) ⇒ B): Seq[B]

[use case] Builds a new collection by applying a function to all elements of this sequence.
[use case]
Builds a new collection by applying a function to all elements of this sequence.
B
the element type of the returned collection.
f
the function to apply to each element.
returns
a new sequence resulting from applying the given function f to each element of this sequence and collecting the results.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike → FilterMonadic
Full Signature
def map[B, That](f: (A) ⇒ B)(implicit bf: CanBuildFrom[Repr, B, That]): That
def max: A

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

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
Full Signature
def max[B >: A](implicit cmp: Ordering[B]): A
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 sequence with the largest value measured by function f.

Definition Classes
TraversableOnce → GenTraversableOnce
Full Signature
def maxBy[B](f: (A) ⇒ B)(implicit cmp: Ordering[B]): A
def min: A

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

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
Full Signature
def min[B >: A](implicit cmp: Ordering[B]): A
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 sequence with the smallest value measured by function f.

Definition Classes
TraversableOnce → GenTraversableOnce
Full Signature
def minBy[B](f: (A) ⇒ B)(implicit cmp: Ordering[B]): A
def mkString: String

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

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def mkString(sep: String): String

Displays all elements of this traversable collection in a string using a separator string.
Displays all elements of this traversable collection in a string using a separator string.
sep
the separator string.
returns
a string representation of this traversable collection. In the resulting string the string representations (w.r.t. the method toString) of all elements of this traversable collection are separated by the string sep.
Definition Classes
TraversableProxyLike → 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 traversable collection in a string using start, end, and separator strings.
Displays all elements of this traversable 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 traversable 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 traversable collection are separated by the string sep.
Definition Classes
TraversableProxyLike → 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
def nonEmpty: Boolean

Tests whether the traversable collection is not empty.
Tests whether the traversable collection is not empty.
returns
true if the traversable collection contains at least one element, false otherwise.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
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
def padTo(len: Int, elem: A): Seq[A]

[use case] A copy of this sequence with an element value appended until a given target length is reached.
[use case]
A copy of this sequence with an element value appended until a given target length is reached.
len
the target length
elem
the padding value
returns
a new sequence consisting of all elements of this sequence followed by the minimal number of occurrences of elem so that the resulting sequence has a length of at least len.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
Full Signature
def padTo[B >: A, That](len: Int, elem: B)(implicit bf: CanBuildFrom[Repr, B, That]): That
def par: ParSeq[A]

Returns a parallel implementation of this collection.
Returns a parallel implementation of this collection.
For most collection types, this method creates a new parallel collection by copying all the elements. For these collection, par takes linear time. Mutable collections in this category do not produce a mutable parallel collection that has the same underlying dataset, so changes in one collection will not be reflected in the other one.
Specific collections (e.g. ParArray or mutable.ParHashMap) override this default behaviour by creating a parallel collection which shares the same underlying dataset. For these collections, par takes constant or sublinear time.
All parallel collections return a reference to themselves.
returns
a parallel implementation of this collection

Definition Classes
Parallelizable
def parCombiner: Combiner[A, ParSeq[A]]

The default par implementation uses the combiner provided by this method to create a new parallel collection.
The default par implementation uses the combiner provided by this method to create a new parallel collection.
returns
a combiner for the parallel collection of type ParRepr

Attributes
protected[this]
Definition Classes
SeqLike → TraversableLike → Parallelizable
def partition(p: (A) ⇒ Boolean): (Repr, Repr)

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

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def patch(from: Int, that: GenSeq[A], replaced: Int): Seq[A]

[use case] Produces a new sequence where a slice of elements in this sequence is replaced by another sequence.
[use case]
Produces a new sequence where a slice of elements in this sequence is replaced by another sequence.
from
the index of the first replaced element
replaced
the number of elements to drop in the original sequence
returns
a new sequence consisting of all elements of this sequence except that replaced elements starting from from are replaced by patch.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
Full Signature
def patch[B >: A, That](from: Int, patch: GenSeq[B], replaced: Int)(implicit bf: CanBuildFrom[Repr, B, That]): That
def permutations: Iterator[Repr]

Iterates over distinct permutations.
Iterates over distinct permutations.
returns
An Iterator which traverses the distinct permutations of this sequence.
Definition Classes
SeqLike
Example:
1. "abb".permutations = Iterator(abb, bab, bba)
def prefixLength(p: (A) ⇒ Boolean): Int

Returns the length of the longest prefix whose elements all satisfy some predicate.
Returns the length of the longest prefix whose elements all satisfy some predicate.
Note: may not terminate for infinite-sized collections.
p
the predicate used to test elements.
returns
the length of the longest prefix of this sequence such that every element of the segment satisfies the predicate p.

Definition Classes
SeqProxyLike → GenSeqLike
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 sequence 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 sequence and as result type of product. Examples of such types are: Long, Float, Double, BigInt.

Definition Classes
TraversableProxyLike → 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 traversable or iterator using the specified associative binary operator.
Reduces the elements of this traversable or iterator 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 traversable or iterator is nonempty.

Definition Classes
TraversableOnce → GenTraversableOnce
Exceptions thrown
UnsupportedOperationException if this traversable or iterator is empty.
def reduceLeft[B >: A](op: (B, A) ⇒ B): B

Applies a binary operator to all elements of this traversable collection, going left to right.
Applies a binary operator to all elements of this traversable 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 traversable collection, going left to right:
```
op( op( ... op(x_1, x_2) ..., x_{n-1}), x_n)
```
where x₁, ..., x_n are the elements of this traversable collection.
Definition Classes
TraversableProxyLike → TraversableOnce
Exceptions thrown
UnsupportedOperationException if this traversable collection is empty.
def reduceLeftOption[B >: A](op: (B, A) ⇒ B): Option[B]

Optionally applies a binary operator to all elements of this traversable collection, going left to right.
Optionally applies a binary operator to all elements of this traversable 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 traversable collection is nonempty, None otherwise.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def reduceOption[A1 >: A](op: (A1, A1) ⇒ A1): Option[A1]

Reduces the elements of this traversable or iterator, if any, using the specified associative binary operator.
Reduces the elements of this traversable or iterator, if any, using the specified associative binary operator.
The order in which operations are performed on elements is unspecified and may be nondeterministic.
A1
A type parameter for the binary operator, a supertype of A.
op
A binary operator that must be associative.
returns
An option value containing result of applying reduce operator op between all the elements if the collection is nonempty, and None otherwise.

Definition Classes
TraversableOnce → GenTraversableOnce
def reduceRight[B >: A](op: (A, B) ⇒ B): B

Applies a binary operator to all elements of this traversable collection, going right to left.
Applies a binary operator to all elements of this traversable 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 traversable collection, 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 traversable collection.
Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
Exceptions thrown
UnsupportedOperationException if this traversable collection is empty.
def reduceRightOption[B >: A](op: (A, B) ⇒ B): Option[B]

Optionally applies a binary operator to all elements of this traversable collection, going right to left.
Optionally applies a binary operator to all elements of this traversable 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 traversable collection is nonempty, None otherwise.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def repr: Repr

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

Definition Classes
TraversableLike → GenTraversableLike
def reverse: Repr

Returns new sequence with elements in reversed order.
Returns new sequence with elements in reversed order.
Note: will not terminate for infinite-sized collections.
returns
A new sequence with all elements of this sequence in reversed order.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
def reverseIterator: Iterator[A]

An iterator yielding elements in reversed order.
An iterator yielding elements in reversed order.
Note: will not terminate for infinite-sized collections.
Note: xs.reverseIterator is the same as xs.reverse.iterator but might be more efficient.
returns
an iterator yielding the elements of this sequence in reversed order

Definition Classes
SeqProxyLike → SeqLike
def reverseMap[B](f: (A) ⇒ B): Seq[B]

[use case] Builds a new collection by applying a function to all elements of this sequence and collecting the results in reversed order.
[use case]
Builds a new collection by applying a function to all elements of this sequence and collecting the results in reversed order.
Note: will not terminate for infinite-sized collections.
Note: xs.reverseMap(f) is the same as xs.reverse.map(f) but might be more efficient.
B
the element type of the returned collection.
f
the function to apply to each element.
returns
a new sequence resulting from applying the given function f to each element of this sequence and collecting the results in reversed order.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
Full Signature
def reverseMap[B, That](f: (A) ⇒ B)(implicit bf: CanBuildFrom[Repr, B, That]): That
def reversed: List[A]

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

[use case] Checks if the other iterable collection contains the same elements in the same order as this sequence.
[use case]
Checks if the other iterable collection contains the same elements in the same order as this sequence.
Note: will not terminate for infinite-sized collections.
that
the collection to compare with.
returns
true, if both collections contain the same elements in the same order, false otherwise.

Definition Classes
IterableProxyLike → 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[Repr, B, That]): That

Computes a prefix scan of the elements of the collection.
Computes a prefix scan of the elements of the collection.
Note: The neutral element z may be applied more than once.
B
element type of the resulting collection
That
type of the resulting collection
z
neutral element for the operator op
op
the associative operator for the scan
cbf
combiner factory which provides a combiner
returns
a new traversable collection containing the prefix scan of the elements in this traversable collection

Definition Classes
TraversableLike → GenTraversableLike
def scanLeft[B, That](z: B)(op: (B, A) ⇒ B)(implicit bf: CanBuildFrom[Repr, B, That]): That

Produces a collection containing cumulative results of applying the operator going left to right.
Produces a collection containing cumulative results of applying the operator going left to right.
Note: will not terminate for infinite-sized collections.
Note: might return different results for different runs, unless the underlying collection type is ordered.
B
the type of the elements in the resulting collection
That
the actual type of the resulting collection
z
the initial value
op
the binary operator applied to the intermediate result and the element
bf
an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and and the new element type B.
returns
collection with intermediate results

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def scanRight[B, That](z: B)(op: (A, B) ⇒ B)(implicit bf: CanBuildFrom[Repr, B, That]): That

Produces a collection containing cumulative results of applying the operator going right to left.
Produces a collection containing cumulative results of applying the operator going right to left. The head of the collection is the last cumulative result.
Note: will not terminate for infinite-sized collections.
Note: might return different results for different runs, unless the underlying collection type is ordered.
Example:
```
List(1, 2, 3, 4).scanRight(0)(_ + _) == List(10, 9, 7, 4, 0)
```
B
the type of the elements in the resulting collection
That
the actual type of the resulting collection
z
the initial value
op
the binary operator applied to the intermediate result and the element
bf
an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and and the new element type B.
returns
collection with intermediate results

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def segmentLength(p: (A) ⇒ Boolean, from: Int): Int

Computes length of longest segment whose elements all satisfy some predicate.
Computes length of longest segment whose elements all satisfy some predicate.
Note: may not terminate for infinite-sized collections.
p
the predicate used to test elements.
from
the index where the search starts.
returns
the length of the longest segment of this sequence starting from index from such that every element of the segment satisfies the predicate p.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
def size: Int

The size of this sequence.
The size of this sequence.
Note: will not terminate for infinite-sized collections.
returns
the number of elements in this sequence.

Definition Classes
SeqProxyLike → TraversableProxyLike → SeqLike → GenTraversableLike → TraversableOnce → GenTraversableOnce
def slice(from: Int, until: Int): Repr

Selects an interval of elements.
Selects an interval of elements. The returned collection is made up of all elements x which satisfy the invariant:
```
from <= indexOf(x) < until
```
Note: might return different results for different runs, unless the underlying collection type is ordered.
returns
a traversable collection containing the elements greater than or equal to index from extending up to (but not including) index until of this traversable collection.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def sliding(size: Int, step: Int): Iterator[Repr]

Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.)
Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.)
size
the number of elements per group
step
the distance between the first elements of successive groups
returns
An iterator producing iterable collections of size size, except the last and the only element will be truncated if there are fewer elements than size.

Definition Classes
IterableProxyLike → IterableLike
See also
scala.collection.Iterator, method sliding
def sliding(size: Int): Iterator[Repr]

Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.) "Sliding window" step is 1 by default.
Groups elements in fixed size blocks by passing a "sliding window" over them (as opposed to partitioning them, as is done in grouped.) "Sliding window" step is 1 by default.
size
the number of elements per group
returns
An iterator producing iterable collections of size size, except the last and the only element will be truncated if there are fewer elements than size.

Definition Classes
IterableProxyLike → IterableLike
See also
scala.collection.Iterator, method sliding
def sortBy[B](f: (A) ⇒ B)(implicit ord: Ordering[B]): Repr

Sorts this Seq according to the Ordering which results from transforming an implicitly given Ordering with a transformation function.
Sorts this Seq according to the Ordering which results from transforming an implicitly given Ordering with a transformation function.
B
the target type of the transformation f, and the type where the ordering ord is defined.
f
the transformation function mapping elements to some other domain B.
ord
the ordering assumed on domain B.
returns
a sequence consisting of the elements of this sequence sorted according to the ordering where x < y if ord.lt(f(x), f(y)).
Definition Classes
SeqProxyLike → SeqLike
Example:
1. val words = "The quick brown fox jumped over the lazy dog".split(' ') // this works because scala.Ordering will implicitly provide an Ordering[Tuple2[Int, Char]] words.sortBy(x => (x.length, x.head)) res0: Array[String] = Array(The, dog, fox, the, lazy, over, brown, quick, jumped)
See also
scala.math.Ordering Note: will not terminate for infinite-sized collections.
def sortWith(lt: (A, A) ⇒ Boolean): Repr

Sorts this sequence according to a comparison function.
Sorts this sequence according to a comparison function.
Note: will not terminate for infinite-sized collections.
The sort is stable. That is, elements that are equal (as determined by lt) appear in the same order in the sorted sequence as in the original.
lt
the comparison function which tests whether its first argument precedes its second argument in the desired ordering.
returns
a sequence consisting of the elements of this sequence sorted according to the comparison function lt.
Definition Classes
SeqProxyLike → SeqLike
Example:
1. List("Steve", "Tom", "John", "Bob").sortWith(_.compareTo(_) < 0) = List("Bob", "John", "Steve", "Tom")
def sorted[B >: A](implicit ord: Ordering[B]): Repr

Sorts this sequence according to an Ordering.
Sorts this sequence according to an Ordering.
The sort is stable. That is, elements that are equal (as determined by lt) appear in the same order in the sorted sequence as in the original.
ord
the ordering to be used to compare elements.
returns
a sequence consisting of the elements of this sequence sorted according to the ordering ord.

Definition Classes
SeqProxyLike → SeqLike
See also
scala.math.Ordering
def span(p: (A) ⇒ Boolean): (Repr, Repr)

Splits this traversable collection into a prefix/suffix pair according to a predicate.
Splits this traversable 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 traversable collection whose elements all satisfy p, and the rest of this traversable collection.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def splitAt(n: Int): (Repr, Repr)

Splits this traversable collection into two at a given position.
Splits this traversable 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 traversable collections consisting of the first n elements of this traversable collection, and the other elements.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def startsWith[B](that: GenSeq[B]): Boolean

Tests whether this sequence starts with the given sequence.
Tests whether this sequence starts with the given sequence.
that
the sequence to test
returns
true if this collection has that as a prefix, false otherwise.

Definition Classes
SeqProxyLike → GenSeqLike
def startsWith[B](that: GenSeq[B], offset: Int): Boolean

Tests whether this sequence contains the given sequence at a given index.
Tests whether this sequence contains the given sequence at a given index.
Note: If the both the receiver object this and the argument that are infinite sequences this method may not terminate.
that
the sequence to test
offset
the index where the sequence is searched.
returns
true if the sequence that is contained in this sequence at index offset, otherwise false.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
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 traversable collection. By default the string prefix is the simple name of the collection class traversable collection.

Definition Classes
TraversableProxyLike → 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 sequence 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 sequence and as result type of sum. Examples of such types are: Long, Float, Double, BigInt.

Definition Classes
TraversableProxyLike → 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: Repr

Selects all elements except the first.
Selects all elements except the first.
Note: might return different results for different runs, unless the underlying collection type is ordered.
returns
a traversable collection consisting of all elements of this traversable collection except the first one.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
Exceptions thrown
`UnsupportedOperationException` if the traversable collection is empty.
def tails: Iterator[Repr]

Iterates over the tails of this traversable collection.
Iterates over the tails of this traversable collection. The first value will be this traversable collection and the final one will be an empty traversable collection, with the intervening values the results of successive applications of tail.
returns
an iterator over all the tails of this traversable collection
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): Repr

Selects first n elements.
Selects first n elements.
Note: might return different results for different runs, unless the underlying collection type is ordered.
n
the number of elements to take from this traversable collection.
returns
a traversable collection consisting only of the first n elements of this traversable collection, or else the whole traversable collection, if it has less than n elements.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def takeRight(n: Int): Repr

Selects last n elements.
Selects last n elements.
Note: might return different results for different runs, unless the underlying collection type is ordered.
n
the number of elements to take
returns
a iterable collection consisting only of the last n elements of this iterable collection, or else the whole iterable collection, if it has less than n elements.

Definition Classes
IterableProxyLike → IterableLike
def takeWhile(p: (A) ⇒ Boolean): Repr

Takes longest prefix of elements that satisfy a predicate.
Takes longest prefix of elements that satisfy a predicate.
Note: might return different results for different runs, unless the underlying collection type is ordered.
returns
the longest prefix of this traversable collection whose elements all satisfy the predicate p.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableLike
def thisCollection: Seq[A]

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

Attributes
protected[this]
Definition Classes
SeqLike → IterableLike → TraversableLike
def to[Col[_]]: Col[A]

[use case] Converts this sequence into another by copying all elements.
[use case]
Converts this sequence into another by copying all elements.
Note: will not terminate for infinite-sized collections.
Col
The collection type to build.
returns
a new collection containing all elements of this sequence.

Definition Classes
TraversableLike → TraversableOnce → GenTraversableOnce
Full Signature
def to[Col[_]](implicit cbf: CanBuildFrom[Nothing, A, Col[A]]): Col[A]
def toArray: Array[A]

[use case] Converts this sequence to an array.
[use case]
Converts this sequence to an array.
Note: will not terminate for infinite-sized collections.
returns
an array containing all elements of this sequence. An ClassTag must be available for the element type of this sequence.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
Full Signature
def toArray[B >: A](implicit arg0: ClassTag[B]): Array[B]
def toBuffer[B >: A]: Buffer[B]

Uses the contents of this traversable collection to create a new mutable buffer.
Uses the contents of this traversable collection to create a new mutable buffer.
Note: will not terminate for infinite-sized collections.
returns
a buffer containing all elements of this traversable collection.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def toCollection(repr: Repr): Seq[A]

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

Attributes
protected[this]
Definition Classes
SeqLike → IterableLike → TraversableLike
def toIndexedSeq: immutable.IndexedSeq[A]

Converts this traversable collection to an indexed sequence.
Converts this traversable collection to an indexed sequence.
Note: will not terminate for infinite-sized collections.
returns
an indexed sequence containing all elements of this traversable collection.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def toIterable: Iterable[A]

Converts this traversable collection to an iterable collection.
Converts this traversable collection to an iterable collection. Note that the choice of target Iterable is lazy in this default implementation as this TraversableOnce may be lazy and unevaluated (i.e. it may be an iterator which is only traversable once).
Note: will not terminate for infinite-sized collections.
returns
an Iterable containing all elements of this traversable collection.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def toIterator: Iterator[A]

Returns an Iterator over the elements in this traversable collection.
Returns an Iterator over the elements in this traversable collection. Will return the same Iterator if this instance is already an Iterator.
Note: will not terminate for infinite-sized collections.
returns
an Iterator containing all elements of this traversable collection.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableOnce
def toList: List[A]

Converts this traversable collection to a list.
Converts this traversable collection to a list.
Note: will not terminate for infinite-sized collections.
returns
a list containing all elements of this traversable collection.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def toMap[T, U]: Map[T, U]

[use case] Converts this sequence to a map.
[use case]
Converts this sequence to a map. This method is unavailable unless the elements are members of Tuple2, each ((T, U)) becoming a key-value pair in the map. Duplicate keys will be overwritten by later keys: if this is an unordered collection, which key is in the resulting map is undefined.
Note: will not terminate for infinite-sized collections.
returns
a map of type immutable.Map[T, U] containing all key/value pairs of type (T, U) of this sequence.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
Full Signature
def toMap[T, U](implicit ev: <:<[A, (T, U)]): immutable.Map[T, U]
def toParArray: ParArray[T]

Implicit information
This member is added by an implicit conversion from SeqProxyLike[A, Repr] to CollectionsHaveToParArray[SeqProxyLike[A, Repr], T] performed by method CollectionsHaveToParArray in scala.collection.parallel. This conversion will take place only if an implicit value of type (SeqProxyLike[A, Repr]) ⇒ GenTraversableOnce[T] is in scope.
Definition Classes
CollectionsHaveToParArray
def toSeq: Seq[A]

Converts this sequence to a sequence.
Converts this sequence 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 sequence.

Definition Classes
SeqProxyLike → TraversableProxyLike → SeqLike → GenSeqLike → TraversableOnce → GenTraversableOnce
def toSet[B >: A]: immutable.Set[B]

Converts this traversable collection to a set.
Converts this traversable collection to a set.
Note: will not terminate for infinite-sized collections.
returns
a set containing all elements of this traversable collection.

Definition Classes
TraversableProxyLike → TraversableOnce → GenTraversableOnce
def toStream: Stream[A]

Converts this traversable collection to a stream.
Converts this traversable collection to a stream.
returns
a stream containing all elements of this traversable collection.

Definition Classes
TraversableProxyLike → TraversableLike → GenTraversableOnce
def toString(): String

Returns a string representation of the object.
Returns a string representation of the object.
The default representation is platform dependent.
returns
a string representation of the object.

Definition Classes
Proxy → Any
def toTraversable: Traversable[A]

Converts this traversable collection to an unspecified Traversable.
Converts this traversable 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 traversable collection.

Definition Classes
TraversableProxyLike → TraversableLike → TraversableOnce → GenTraversableOnce
def toVector: Vector[A]

Converts this traversable or iterator to a Vector.
Converts this traversable or iterator to a Vector.
Note: will not terminate for infinite-sized collections.
returns
a vector containing all elements of this traversable or iterator.

Definition Classes
TraversableOnce → GenTraversableOnce
def union(that: Seq[A]): Seq[A]

[use case] Produces a new sequence which contains all elements of this sequence and also all elements of a given sequence.
[use case]
Produces a new sequence which contains all elements of this sequence and also all elements of a given sequence. xs union ys is equivalent to xs ++ ys.
Another way to express this is that xs union ys computes the order-preserving multi-set union of xs and ys. union is hence a counter-part of diff and intersect which also work on multi-sets.
Note: will not terminate for infinite-sized collections.
that
the sequence to add.
returns
a new sequence which contains all elements of this sequence followed by all elements of that.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
Full Signature
def union[B >: A, That](that: GenSeq[B])(implicit bf: CanBuildFrom[Repr, B, That]): That
def updated(index: Int, elem: A): Seq[A]

[use case] A copy of this sequence with one single replaced element.
[use case]
A copy of this sequence with one single replaced element.
index
the position of the replacement
elem
the replacing element
returns
a copy of this sequence with the element at position index replaced by elem.

Definition Classes
SeqProxyLike → SeqLike → GenSeqLike
Full Signature
def updated[B >: A, That](index: Int, elem: B)(implicit bf: CanBuildFrom[Repr, B, That]): That
def view(from: Int, until: Int): SeqView[A, Repr]

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

Definition Classes
SeqProxyLike → IterableProxyLike → TraversableProxyLike → SeqLike → IterableLike → TraversableLike
def view: SeqView[A, Repr]

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

Definition Classes
SeqProxyLike → IterableProxyLike → TraversableProxyLike → SeqLike → 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): FilterMonadic[A, Repr]

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

Definition Classes
TraversableLike → FilterMonadic
def zip[B](that: GenIterable[B]): Seq[(A, B)]

[use case] Returns a sequence formed from this sequence and another iterable collection by combining corresponding elements in pairs.
[use case]
Returns a sequence formed from this sequence 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 sequence containing pairs consisting of corresponding elements of this sequence and that. The length of the returned collection is the minimum of the lengths of this sequence and that.

Definition Classes
IterableProxyLike → IterableLike → GenIterableLike
Full Signature
def zip[A1 >: A, B, That](that: GenIterable[B])(implicit bf: CanBuildFrom[Repr, (A1, B), That]): That
def zipAll[B](that: Iterable[B], thisElem: A, thatElem: B): Seq[(A, B)]

[use case] Returns a sequence formed from this sequence and another iterable collection by combining corresponding elements in pairs.
[use case]
Returns a sequence formed from this sequence 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 sequence is shorter than that.
thatElem
the element to be used to fill up the result if that is shorter than this sequence.
returns
a new sequence containing pairs consisting of corresponding elements of this sequence and that. The length of the returned collection is the maximum of the lengths of this sequence and that. If this sequence is shorter than that, thisElem values are used to pad the result. If that is shorter than this sequence, thatElem values are used to pad the result.

Definition Classes
IterableProxyLike → IterableLike → GenIterableLike
Full Signature
def zipAll[B, A1 >: A, That](that: GenIterable[B], thisElem: A1, thatElem: B)(implicit bf: CanBuildFrom[Repr, (A1, B), That]): That
def zipWithIndex: Seq[(A, Int)]

[use case] Zips this sequence with its indices.
[use case]
Zips this sequence with its indices.
returns
A new sequence containing pairs consisting of all elements of this sequence paired with their index. Indices start at 0.
Definition Classes
IterableProxyLike → IterableLike → GenIterableLike
Full Signature
def zipWithIndex[A1 >: A, That](implicit bf: CanBuildFrom[Repr, (A1, Int), That]): That
Example:
1. List("a", "b", "c").zipWithIndex = List(("a", 0), ("b", 1), ("c", 2))
def →[B](y: B): (SeqProxyLike[A, Repr], B)

Implicit information
This member is added by an implicit conversion from SeqProxyLike[A, Repr] to ArrowAssoc[SeqProxyLike[A, Repr]] performed by method ArrowAssoc in scala.Predef.
Definition Classes
ArrowAssoc
def filter(p: (A) ⇒ Boolean): TraversableOnce[A]
Implicit information
This member is added by an implicit conversion from SeqProxyLike[A, Repr] to MonadOps[A] performed by method MonadOps in scala.collection.TraversableOnce.
Shadowing
This implicitly inherited member is shadowed by one or more members in this class.
To access this member you can use a type ascription:
(seqProxyLike: MonadOps[A]).filter(p)
Definition Classes
MonadOps
def flatMap[B](f: (A) ⇒ GenTraversableOnce[B]): TraversableOnce[B]
Implicit information
This member is added by an implicit conversion from SeqProxyLike[A, Repr] to MonadOps[A] performed by method MonadOps in scala.collection.TraversableOnce.
Shadowing
This implicitly inherited member is shadowed by one or more members in this class.
To access this member you can use a type ascription:
(seqProxyLike: MonadOps[A]).flatMap(f)
Definition Classes
MonadOps
def map[B](f: (A) ⇒ B): TraversableOnce[B]
Implicit information
This member is added by an implicit conversion from SeqProxyLike[A, Repr] to MonadOps[A] performed by method MonadOps in scala.collection.TraversableOnce.
Shadowing
This implicitly inherited member is shadowed by one or more members in this class.
To access this member you can use a type ascription:
(seqProxyLike: MonadOps[A]).map(f)
Definition Classes
MonadOps
def withFilter(p: (A) ⇒ Boolean): Iterator[A]
Implicit information
This member is added by an implicit conversion from SeqProxyLike[A, Repr] to MonadOps[A] performed by method MonadOps in scala.collection.TraversableOnce.
Shadowing
This implicitly inherited member is shadowed by one or more members in this class.
To access this member you can use a type ascription:
(seqProxyLike: MonadOps[A]).withFilter(p)
Definition Classes
MonadOps

Related Doc: package collection

trait SeqProxyLike[+A, +Repr <: SeqLike[A, Repr] with Seq[A]] extends SeqLike[A, Repr] with IterableProxyLike[A, Repr]

Type Members

type Self = Repr

class WithFilter extends FilterMonadic[A, Repr]

Abstract Value Members

abstract def newBuilder: Builder[A, Repr]

abstract def self: Repr

abstract def seq: Seq[A]

Concrete Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

def +(other: String): String

def ++[B](that: GenTraversableOnce[B]): Seq[B]

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

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

def ++:[B](that: TraversableOnce[B]): Seq[B]

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

def +:(elem: A): Seq[A]

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

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

def /:[B](z: B)(op: (B, A) ⇒ B): B

def :+(elem: A): Seq[A]

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

def :\[B](z: B)(op: (A, B) ⇒ B): B

final def ==(arg0: Any): Boolean

def addString(b: mutable.StringBuilder): mutable.StringBuilder

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

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

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

def apply(idx: Int): A

final def asInstanceOf[T0]: T0

def canEqual(that: Any): Boolean

def clone(): AnyRef

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

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

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

def combinations(n: Int): Iterator[Repr]

def contains[A1 >: A](elem: A1): Boolean

def containsSlice[B](that: GenSeq[B]): Boolean

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

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

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

def corresponds[B](that: GenSeq[B])(p: (A, B) ⇒ Boolean): Boolean

def count(p: (A) ⇒ Boolean): Int

def diff(that: Seq[A]): Seq[A]

def diff[B >: A](that: GenSeq[B]): Repr

def distinct: Repr

def drop(n: Int): Repr

def dropRight(n: Int): Repr

def dropWhile(p: (A) ⇒ Boolean): Repr

def endsWith[B](that: GenSeq[B]): Boolean

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

def ensuring(cond: (SeqProxyLike[A, Repr]) ⇒ Boolean): SeqProxyLike[A, Repr]

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

def ensuring(cond: Boolean): SeqProxyLike[A, Repr]

final def eq(arg0: AnyRef): Boolean

def equals(that: Any): Boolean

def exists(p: (A) ⇒ Boolean): Boolean

def filter(p: (A) ⇒ Boolean): Repr

def filterNot(p: (A) ⇒ Boolean): Repr

def finalize(): Unit

def find(p: (A) ⇒ Boolean): Option[A]

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

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

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

def forall(p: (A) ⇒ Boolean): Boolean

def foreach(f: (A) ⇒ Unit): Unit

def foreach[U](f: (A) ⇒ U): Unit

def formatted(fmtstr: String): String

final def getClass(): Class[_]

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

def grouped(size: Int): Iterator[Repr]