Scaladoc for scala.collection.immutable.Stream.Empty

Inherits

Stream
LinearSeq
LinearSeq
LinearSeqLike
Seq
Seq
SeqLike
PartialFunction
Function1
Iterable
Iterable
IterableLike
Equals
Traversable
Immutable
Traversable
GenericTraversableTemplate
TraversableLike
HasNewBuilder
AnyRef
Any

Type Members

class WithFilter extends AnyRef

A class supporting filtered operations

Value Members

def ++[B >: A, That](that: Iterator[B])(bf: CanBuildFrom[Stream[A], B, That]): That

Create a new stream which contains all elements of this stream followed by all elements of Iterator that'

Create a new stream which contains all elements of this stream followed by all elements of Iterator that'

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 iterator to append.
bf
an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and the new element type B.
returns
a new collection of type That which contains all elements of this sequence followed by all elements of that.

definition classes: Stream ⇐ TraversableLike
def ++[B >: A, That](that: Traversable[B])(bf: CanBuildFrom[Stream[A], B, That]): That

Create a new stream which contains all elements of this stream followed by all elements of Traversable that'

Create a new stream which contains all elements of this stream followed by all elements of Traversable that'

B
the element type of the returned collection.
That
the class of the returned collection. Where possible, That is the same class as the current collection class Repr, but this depends on the element type B being admissible for that class, which means that an implicit instance of type CanBuildFrom[Repr, B, That] is found.
that
the traversable to append.
bf
an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and the new element type B.
returns
a new collection of type That which contains all elements of this sequence followed by all elements of that.

definition classes: Stream ⇐ TraversableLike
def +:[B >: A, That](elem: B)(bf: CanBuildFrom[Repr, B, That]): That

Prepends an element to this sequence

Prepends an element to this sequence

B
the element type of the returned sequence.
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.
elem
the prepended element
bf
an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and the new element type B.
returns
a new collection of type That consisting of elem followed by all elements of this sequence.

definition classes: SeqLike
def /:[B](z: B)(op: (B, A) ⇒ B): B

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

Applies a binary operator to a start value and all elements of this sequence, going left to right.
Note: /: is alternate syntax for foldLeft; z /: xs is the same as xs foldLeft z.
Note: will not terminate for infinite-sized collections.

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 sequence$, going left to right with the start value z on the left: {{{ op(...op(op(z, x₁), x₂), ..., x_n) }}} where x,,1,,, ..., x,,n,, are the elements of this sequence.

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

Appends an element to this sequence

Appends an element to this sequence
Note: will not terminate for infinite-sized collections.

B
the element type of the returned sequence.
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.
elem
the appended element
bf
an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and the new element type B.
returns
a new collection of type That consisting of all elements of this sequence followed by elem.

definition classes: SeqLike
def :\[B](z: B)(op: (A, B) ⇒ B): B

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

Applies a binary operator to all elements of this sequence 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.

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 sequence$, going right to left with the start value z on the right: {{{ op(x₁, op(x₂, ... op(x_n, z)...)) }}} where x,,1,,, ..., x,,n,, are the elements of this sequence.

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

Write all defined elements of this iterable into given string builder

Write all defined elements of this iterable into given string builder. The written text begins with the string start and is finished by the string end. Inside, the string representations of defined elements (w.r.t. the method toString()) are separated by the string sep. The method will not force evaluation of undefined elements. A tail of such elements will be represented by a "?" instead.

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: Stream ⇐ TraversableLike
def addString(b: StringBuilder): StringBuilder

Appends all elements of this sequence to a string builder

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

b
the string builder to which elements are appended.
returns
the string builder b to which elements were appended.

definition classes: TraversableLike
def addString(b: StringBuilder, sep: String): StringBuilder

Appends all elements of this sequence to a string builder using a separator string

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

b
the string builder to which elements are appended.
sep
the separator string.
returns
the string builder b to which elements were appended.

definition classes: TraversableLike
def andThen[C](k: (B) ⇒ C): PartialFunction[A, C]

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

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

C
the result type of the transformation function.
k
the transformation function
returns
a partial function with the same domain as this partial function, which maps arguments x to k(this(x)).

definition classes: PartialFunction ⇐ Function1
def append[B >: A](rest: ⇒ Traversable[B]): Stream[B]

The stream resulting from the concatenation of this stream with the argument stream

The stream resulting from the concatenation of this stream with the argument stream.

rest
The stream that gets appended to this stream

definition classes: Stream
def apply(n: Int): A

Selects an element by its index in the sequence

Selects an element by its index in the sequence. Note: the execution of apply may take time proportial to the index value.

definition classes: LinearSeqLike ⇐ SeqLike
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 sequence should be compared
returns
true, if this sequence 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 companion: GenericCompanion[Stream[A][A]]

The factory companion object that builds instances of class LinearSeq

The factory companion object that builds instances of class LinearSeq.

definition classes: Stream ⇐ LinearSeq ⇐ LinearSeq ⇐ Seq ⇐ Seq ⇐ Iterable ⇐ Iterable ⇐ Traversable ⇐ Traversable ⇐ GenericTraversableTemplate
def compose[A](g: (A) ⇒ T1): (A) ⇒ R

(f compose g)(x) == f(g(x))

(f compose g)(x) == f(g(x))

definition classes: Function1
def contains(elem: Any): 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 is equal (wrt ==) to elem, false otherwise.

definition classes: SeqLike
def containsSlice[B](that: Seq[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: SeqLike
def copyToArray[B >: A](xs: Array[B], start: Int, len: Int): Unit

Copies elements of this sequence to an array

Copies 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 array is reached, or len elements have been copied.
Note: will not terminate for infinite-sized collections.

B
the type of the elements of the array.
xs
the array to fill.
start
the starting index.
len
the maximal number of elements to copy.

definition classes: IterableLike ⇐ TraversableLike
def copyToArray[B >: A](xs: Array[B]): Unit

Copies elements of this sequence to an array

Copies elements of this sequence to an array. Fills the given array xs with all elements of this sequence, starting at position 0. Copying will stop once either the end of the current sequence is reached, or the end of the array is reached.
Note: will not terminate for infinite-sized collections.

B
the type of the elements of the array.
xs
the array to fill.

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

Copies elements of this sequence to an array

Copies elements of this sequence to an array. Fills the given array xs with all 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 array is reached.
Note: will not terminate for infinite-sized collections.

B
the type of the elements of the array.
xs
the array to fill.
start
the starting index.

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

Copies all elements of this sequence to a buffer

Copies all elements of this sequence to a buffer.
Note: will not terminate for infinite-sized collections.

dest
The buffer to which elements are copied.

definition classes: TraversableLike
def corresponds[B](that: Seq[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: SeqLike
def count(p: (A) ⇒ Boolean): Int

Counts the number of elements in the sequence which satisfy a predicate

Counts the number of elements in the sequence which satisfy a predicate.

p
the predicate used to test elements.
returns
the number of elements satisfying the predicate p.

definition classes: LinearSeqLike ⇐ TraversableLike
def diff[B >: A, That](that: Seq[B]): Repr

Computes the multiset difference between this sequence and another sequence

Computes the multiset difference between this sequence and another sequence.
Note: will not terminate for infinite-sized collections.

B
the element type of the returned sequence.
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 sequence of elements to remove
returns
a new collection of type That 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: SeqLike
def drop(n: Int): Repr

Selects all elements except first n ones

Selects all elements except first n ones.

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

definition classes: LinearSeqLike ⇐ TraversableLike
def dropRight(n: Int): Repr

Selects all elements except first n ones

Selects all elements except first n ones.

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

definition classes: LinearSeqLike ⇐ IterableLike
def dropWhile(p: (A) ⇒ Boolean): Stream[A]

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

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

p
the test predicate.
returns
the longest suffix of this sequence whose first element does not satisfy the predicate p.

definition classes: Stream ⇐ TraversableLike
def elements: Iterator[A]
def endsWith[B](that: Seq[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: SeqLike
def equals(that: Any): Boolean

The equality method defined in AnyRef

The equality method defined in AnyRef.

definition classes: SeqLike ⇐ Equals ⇐ AnyRef ⇐ Any
def equalsWith[B](that: Seq[B])(f: (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
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: SeqLike
def exists(p: (A) ⇒ Boolean): Boolean

Tests whether a predicate holds for some of the elements of this sequence

Tests whether a predicate holds for some of the elements of this sequence.
Note: may not terminate for infinite-sized collections.

p
the predicate used to test elements.
returns
true if the given predicate p holds for some of the elements of this sequence, otherwise false.

definition classes: LinearSeqLike ⇐ IterableLike ⇐ TraversableLike
def filterNot(p: (A) ⇒ Boolean): Repr

Selects all elements of this sequence which do not satisfy a predicate

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

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

definition classes: TraversableLike
def find(p: (A) ⇒ Boolean): Option[A]

Finds the first element of the sequence satisfying a predicate, if any

Finds the first element of the sequence satisfying a predicate, if any.
Note: may not terminate for infinite-sized collections.

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

definition classes: LinearSeqLike ⇐ IterableLike ⇐ TraversableLike
def findIndexOf(p: (A) ⇒ Boolean): Int

Returns index of the first element satisying a predicate, or -1

Returns index of the first element satisying a predicate, or -1.

definition classes: SeqLike
def findLastIndexOf(p: (A) ⇒ Boolean): Int

Returns index of the last element satisying a predicate, or -1

Returns index of the last element satisying a predicate, or -1.

definition classes: SeqLike
def first: A
def firstOption: Option[A]

None if iterable is empty

None if iterable is empty.

definition classes: IterableLike
def flatten[B](asTraversable: (A) ⇒ Traversable[B]): Stream[B]

Converts this sequence of traversable collections into a sequence in which all element collections are concatenated

Converts this sequence of traversable collections into a sequence in which all element collections are concatenated.

B
the type of the elements of each traversable collection.
asTraversable
an implicit conversion which asserts that the element type of this sequence is a Traversable.
returns
a new sequence resulting from concatenating all element sequences.

definition classes: Stream ⇐ GenericTraversableTemplate
def foldRight[B](z: B)(f: (A, B) ⇒ B): B

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

Applies a binary operator to all elements of this sequence and a start value, going right to left.
Note: will not terminate for infinite-sized collections.

B
the result type of the binary operator.
z
the start value.
returns
the result of inserting op between consecutive elements of this sequence$, going right to left with the start value z on the right: {{{ op(x₁, op(x₂, ... op(x_n, z)...)) }}} where x,,1,,, ..., x,,n,, are the elements of this sequence.

definition classes: LinearSeqLike ⇐ IterableLike ⇐ TraversableLike
def forall(p: (A) ⇒ Boolean): Boolean

Tests whether a predicate holds for all elements of this sequence

Tests whether a predicate holds for all elements of this sequence.
Note: may not terminate for infinite-sized collections.

p
the predicate used to test elements.
returns
true if the given predicate p holds for all elements of this sequence, otherwise false.

definition classes: LinearSeqLike ⇐ IterableLike ⇐ TraversableLike
def force: Stream[A]

Force evaluation of the whole stream and return it

Force evaluation of the whole stream and return it

definition classes: Stream
def genericBuilder[B]: Builder[B, CC[B]]

The generic builder that builds instances of LinearSeq at arbitrary element types

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

definition classes: GenericTraversableTemplate
def groupBy[K](f: (A) ⇒ K): Map[K, Repr]

Partitions this sequence into a map of sequences according to some discriminator function

Partitions this sequence into a map of sequences 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 sequence.

K
the type of keys returned by the discriminator function.
f
the discriminator function.
returns
A map from keys to sequences such that the following invariant holds: {{{ (xs partition f)(k) = xs filter (x => f(x) == k) }}} That is, every key k is bound to a sequence of those elements x for which f(x) equals k.

definition classes: TraversableLike
def hasDefiniteSize: Boolean

Tests whether this sequence is known to have a finite size

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

definition classes: Stream ⇐ TraversableLike
def hashCode(): Int

Hashcodes for LinearSeq produce a value from the hashcodes of all the elements of the sequence

Hashcodes for LinearSeq produce a value from the hashcodes of all the elements of the sequence.

definition classes: SeqLike ⇐ AnyRef ⇐ Any
def head: Nothing

The first element of this stream

The first element of this stream

definition classes: Empty ⇐ Stream ⇐ LinearSeqLike ⇐ IterableLike ⇐ GenericTraversableTemplate ⇐ TraversableLike
def headOption: Option[A]

Optionally selects the first element

Optionally selects the first element.

definition classes: TraversableLike
def indexOf[B >: A](elem: B, from: Int): Int

Finds index of first occurrence of some value in this sequence after or at some start index

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.

B
the type of the element elem.
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 (wrt ==) to elem, or -1, if none exists.

definition classes: SeqLike
def indexOf[B >: A](elem: B): Int

Finds index of first occurrence of some value in this sequence

Finds index of first occurrence of some value in this sequence.
Note: may not terminate for infinite-sized collections.

B
the type of the element elem.
elem
the element value to search for.
returns
the index of the first element of this sequence that is equal (wrt ==) to elem, or -1, if none exists.

definition classes: SeqLike
def indexOfSlice[B >: A](that: Seq[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: SeqLike
def indexOfSlice[B >: A](that: Seq[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: 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: LinearSeqLike ⇐ SeqLike
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: SeqLike
def indices: Range

Produces the range of all indices of this sequence

Produces the range of all indices of this sequence.

definition classes: SeqLike
def init: Stream[A]

The stream without its last element

The stream without its last element.

definition classes: Stream ⇐ TraversableLike
def intersect[B >: A, That](that: Seq[B]): Repr

Computes the multiset intersection between this sequence and another sequence

Computes the multiset intersection between this sequence and another sequence.
Note: may not terminate for infinite-sized collections.

B
the element type of the returned sequence.
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 sequence of elements to intersect with.
returns
a new collection of type That 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: SeqLike
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].

definition classes: LinearSeqLike ⇐ SeqLike
def isEmpty: Boolean

is this stream empty? @return true if the sequence contain no elements, false otherwise

is this stream empty? @return true if the sequence contain no elements, false otherwise.

definition classes: Empty ⇐ Stream ⇐ LinearSeqLike ⇐ IterableLike ⇐ GenericTraversableTemplate ⇐ TraversableLike
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.

definition classes: LinearSeqLike ⇐ IterableLike
def last: A

Selects the last element

Selects the last element.

definition classes: LinearSeqLike ⇐ TraversableLike
def lastIndexOf[B >: A](elem: B, end: Int): Int

Finds index of last occurrence of some value in this sequence before or at a given end index

Finds index of last occurrence of some value in this sequence before or at a given end index.

B
the type of the element elem.
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 (wrt ==) to elem, or -1, if none exists.

definition classes: SeqLike
def lastIndexOf[B >: A](elem: B): Int

Finds index of last occurrence of some value in this sequence

Finds index of last occurrence of some value in this sequence.
Note: will not terminate for infinite-sized collections.

B
the type of the element elem.
elem
the element value to search for.
returns
the index of the last element of this sequence that is equal (wrt ==) to elem, or -1, if none exists.

definition classes: SeqLike
def lastIndexOfSlice[B >: A](that: Seq[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 idnex
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: SeqLike
def lastIndexOfSlice[B >: A](that: Seq[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: 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: LinearSeqLike ⇐ SeqLike
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: SeqLike
def lastOption: Option[A]

Optionally selects the last element

Optionally selects the last element.

definition classes: TraversableLike
def length: Int

The length of the sequence

The length of the sequence.
Note: will not terminate for infinite-sized collections.
Note: the execution of length may take time proportial to the length of the sequence.

definition classes: LinearSeqLike ⇐ SeqLike
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: LinearSeqLike ⇐ SeqLike
def lift: (A) ⇒ Option[B]

Turns this partial function into an plain function returning an Option result

Turns this partial function into an plain function returning an Option result.

definition classes: PartialFunction
def max[B >: A](cmp: Ordering[B]): A

Finds the largest element

Finds the largest element.

B
The type over which the ordering is defined.
cmp
An ordering to be used for comparing elements.
returns
the largest element of this sequence with respect to the ordering cmp.

definition classes: TraversableLike
def min[B >: A](cmp: Ordering[B]): A

Finds the smallest element

Finds the smallest element.

B
The type over which the ordering is defined.
cmp
An ordering to be used for comparing elements.
returns
the smallest element of this sequence with respect to the ordering cmp.

definition classes: TraversableLike
def mkString: String

Displays all elements of this sequence in a string

Displays all elements of this sequence in a string.

definition classes: Stream ⇐ TraversableLike
def mkString(sep: String): String

Displays all elements of this sequence in a string using a separator string

Displays all elements of this sequence in a string using a separator string.

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

definition classes: Stream ⇐ TraversableLike
def mkString(start: String, sep: String, end: String): String

Displays all elements of this sequence in a string using start, end, and separator strings

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

definition classes: Stream ⇐ TraversableLike
def nonEmpty: Boolean

Tests whether the sequence is not empty

Tests whether the sequence is not empty.

definition classes: TraversableLike
def orElse[A1 <: A, B1 >: B](that: PartialFunction[A1, B1]): PartialFunction[A1, B1]

Composes this partial function with a fallback partial function which gets applied where this partial function is not defined

Composes this partial function with a fallback partial function which gets applied where this partial function is not defined.

A1
the argument type of the fallback function
B1
the result type of the fallback function
that
the fallback function
returns
a partial function which has as domain the union of the domains of this partial function and that. The resulting partial function takes x to this(x) where this is defined, and to that(x) where it is not.

definition classes: PartialFunction
def padTo[B >: A, That](len: Int, elem: B)(bf: CanBuildFrom[Stream[A], B, That]): That

Returns a new sequence of given length containing the elements of this sequence followed by zero or more occurrences of given elements

Returns a new sequence of given length containing the elements of this sequence followed by zero or more occurrences of given elements.

B
the element type of the returned sequence.
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.
len
the target length
elem
the padding value
bf
an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and the new element type B.
returns
a new collection of type That consisting of all elements of this sequence followed by the minimal number of occurrences of elem so that the resulting collection has a length of at least len.

definition classes: Stream ⇐ SeqLike
def partialMap[B, That](pf: PartialFunction[A, B])(bf: CanBuildFrom[Repr, B, That]): That

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

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.
That
the class of the returned collection. Where possible, That is the same class as the current collection class Repr, but this depends on the element type B being admissible for that class, which means that an implicit instance of type CanBuildFrom[Repr, B, That] is found.
pf
the partial function which filters and maps the sequence.
bf
an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and the new element type B.
returns
a new collection of type That resulting from applying the partial function pf to each element on which it is defined and collecting the results. The order of the elements is preserved.

definition classes: TraversableLike
def partition(p: (A) ⇒ Boolean): (Stream[A], Stream[A])

Returns all the elements of this stream that satisfy the predicate p

Returns all the elements of this stream that satisfy the predicate p. The order of the elements is preserved.

p
the predicate used to filter the stream.
returns
the elements of this stream satisfying p.

definition classes: Stream ⇐ TraversableLike
def patch[B >: A, That](from: Int, patch: Seq[B], replaced: Int)(bf: CanBuildFrom[Repr, B, That]): That

Produces a new sequence where a slice of elements in this sequence is replaced by another sequence

Produces a new sequence where a slice of elements in this sequence is replaced by another sequence.

B
the element type of the returned sequence.
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.
from
the index of the first replaced element
patch
the replacement sequence
replaced
the number of elements to drop in the original sequence
bf
an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and the new element type B.
returns
a new collection of type That consisting of all elements of this sequence except that replaced elements starting from from are replaced by patch.

definition classes: SeqLike
def prefixLength(p: (A) ⇒ Boolean): Int

Returns the length of the longest prefix whose elements all satisfy some preficate

Returns the length of the longest prefix whose elements all satisfy some preficate.
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: SeqLike
def print(sep: String): Unit

Prints elements of this stream one by one, separated by sep

Prints elements of this stream one by one, separated by sep

sep
The separator string printed between consecutive elements.

definition classes: Stream
def print(): Unit

Prints elements of this stream one by one, separated by commas

Prints elements of this stream one by one, separated by commas

definition classes: Stream
def product[B >: A](num: Numeric[B]): B

Multiplies up the elements of this collection

Multiplies up the elements of this collection.

B
the result type of the * operator.
num
an implicit parameter defining a set of numeric operations which includes the * operator to be used in forming the product.
returns
the product of all elements of this sequence with respect to the * operator in num.

definition classes: TraversableLike
def projection: SeqView[A, Repr]

returns a projection that can be used to call non-strict filter, map, and flatMap methods that build projections of the collection

returns a projection that can be used to call non-strict filter, map, and flatMap methods that build projections of the collection.

definition classes: SeqLike ⇐ IterableLike
def reduceLeft[B >: A](f: (B, A) ⇒ B): B

Applies a binary operator to all elements of this sequence, going left to right

Applies a binary operator to all elements of this sequence, going left to right.
Note: will not terminate for infinite-sized collections.

B
the result type of the binary operator.
returns
the result of inserting op between consecutive elements of this sequence$, going left to right: {{{ op(...(op(x₁, x₂), ... ) , x_n) }}} where x,,1,,, ..., x,,n,, are the elements of this sequence.

definition classes: LinearSeqLike ⇐ TraversableLike
def reduceLeftOption[B >: A](op: (B, A) ⇒ B): Option[B]

Optionally applies a binary operator to all elements of this sequence, going left to right

Optionally applies a binary operator to all elements of this sequence, going left to right.
Note: will not terminate for infinite-sized collections.

B
the result type of the binary operator.
op
the binary operator.
returns
an option value containing the result of reduceLeft(op) is this sequence is nonempty, None otherwise.

definition classes: TraversableLike
def reduceRight[B >: A](op: (A, B) ⇒ B): B

Applies a binary operator to all elements of this sequence, going right to left

Applies a binary operator to all elements of this sequence, going right to left.
Note: will not terminate for infinite-sized collections.

B
the result type of the binary operator.
op
the binary operator.
returns
the result of inserting op between consecutive elements of this sequence$, going right to left: {{{ op(x₁, op(x₂, ..., op(x_n-1, x_n)...)) }}} where x,,1,,, ..., x,,n,, are the elements of this sequence.

definition classes: LinearSeqLike ⇐ IterableLike ⇐ TraversableLike
def reduceRightOption[B >: A](op: (A, B) ⇒ B): Option[B]

Optionally applies a binary operator to all elements of this sequence, going right to left

Optionally applies a binary operator to all elements of this sequence, going right to left.
Note: will not terminate for infinite-sized collections.

B
the result type of the binary operator.
op
the binary operator.
returns
an option value containing the result of reduceRight(op) is this sequence is nonempty, None otherwise.

definition classes: TraversableLike
def removeDuplicates: Stream[A]

Builds a new stream from this stream in which any duplicates (wrt to ==) removed

Builds a new stream from this stream in which any duplicates (wrt to ==) removed. Among duplicate elements, only the first one is retained in the result stream

definition classes: Stream ⇐ SeqLike
def repr: Repr

The collection of type sequence underlying this TraversableLike object

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

definition classes: TraversableLike
def reverse: Stream[A]

A list consisting of all elements of this list in reverse order

A list consisting of all elements of this list in reverse order.

definition classes: Stream ⇐ SeqLike
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.

definition classes: SeqLike
def reverseMap[B, That](f: (A) ⇒ B)(bf: CanBuildFrom[Repr, B, That]): That

Builds a new collection by applying a function to all elements of this sequence and collecting the results in reversed order

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.
That
the class of the returned collection. Where possible, That is the same class as the current collection class Repr, but this depends on the element type B being admissible for that class, which means that an implicit instance of type CanBuildFrom[Repr, B, That] is found.
f
the function to apply to each element.
bf
an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and the new element type B.
returns
a new collection of type That resulting from applying the given function f to each element of this sequence and collecting the results in reversed order.

definition classes: SeqLike
def reversedElements: Iterator[A]
def sameElements[B >: A](that: Iterable[B]): Boolean

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

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.

B
the type of the elements of collection that.
that
the collection to compare with.
returns
true, if both collections contain the same elements in the same order, false otherwise.

definition classes: LinearSeqLike ⇐ IterableLike
def segmentLength(p: (A) ⇒ Boolean, from: Int): Int

Computes length of longest segment whose elements all satisfy some preficate

Computes length of longest segment whose elements all satisfy some preficate.
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: LinearSeqLike ⇐ SeqLike
def size: Int

The size of this sequence, equivalent to length

The size of this sequence, equivalent to length.
Note: will not terminate for infinite-sized collections.

definition classes: SeqLike ⇐ TraversableLike
def slice(start: Int, end: Int): Stream[A]

A substream starting at index from and extending up to (but not including) index until

A substream starting at index from and extending up to (but not including) index until.

start
The index of the first element of the returned subsequence
end
The index of the element following the returned subsequence
returns
a sequence containing the elements starting at index from and extending up to (but not including) index until of this sequence.

definition classes: Stream ⇐ LinearSeqLike ⇐ IterableLike ⇐ TraversableLike
def sortBy[B](f: (A) ⇒ B)(ord: Ordering[B]): Repr

Sorts this LinearSeq according to the Ordering which results from transforming an implicitly given Ordering with a transformation function

Sorts this LinearSeq 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: SeqLike
def sortWith[B >: A](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 wrt 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: SeqLike
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 wrt 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: SeqLike
def span(p: (A) ⇒ Boolean): (Repr, Repr)

Spits this sequence into a prefix/suffix pair according to a predicate

Spits this sequence 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.

p
the test predicate
returns
a pair consisting of the longest prefix of this sequence whose elements all satisfy p, and the rest of this sequence.

definition classes: LinearSeqLike ⇐ TraversableLike
def splitAt(n: Int): (Repr, Repr)

Splits this sequence into two at a given position

Splits this sequence into two at a given position. Note: c splitAt n is equivalent to (but possibly more efficient than) (c take n, c drop n).

n
the position at which to split.
returns
a pair of sequences consisting of the first n elements of this sequence, and the other elements.

definition classes: TraversableLike
def startsWith[B](that: Seq[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. otherwise false

definition classes: SeqLike
def startsWith[B](that: Seq[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.
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: SeqLike
def stringPrefix: String

Defines the prefix of this object's toString representation as Stream

Defines the prefix of this object's toString representation as Stream.

definition classes: Stream ⇐ TraversableLike
def sum[B >: A](num: Numeric[B]): B

Sums up the elements of this collection

Sums up the elements of this collection.

B
the result type of the + operator.
num
an implicit parameter defining a set of numeric operations which includes the + operator to be used in forming the sum.
returns
the sum of all elements of this sequence with respect to the + operator in num.

definition classes: TraversableLike
def tail: Nothing

A stream consisting of the remaining elements of this stream after the first one

A stream consisting of the remaining elements of this stream after the first one.

definition classes: Empty ⇐ Stream ⇐ LinearSeqLike ⇐ TraversableLike
def tailDefined: Boolean

Is the tail of this stream defined?

Is the tail of this stream defined?

definition classes: Empty ⇐ Stream
def take(n: Int): Stream[A]

Returns the n first elements of this stream, or else the whole stream, if it has less than n elements

Returns the n first elements of this stream, or else the whole stream, if it has less than n elements.

n
the number of elements to take.
returns
the n first elements of this stream.

definition classes: Stream ⇐ LinearSeqLike ⇐ IterableLike ⇐ TraversableLike
def takeRight(n: Int): Stream[A]

Returns the rightmost n elements from this iterable

Returns the rightmost n elements from this iterable.

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

definition classes: Stream ⇐ IterableLike
def takeWhile(p: (A) ⇒ Boolean): Stream[A]

Returns the longest prefix of this stream whose elements satisfy the predicate p

Returns the longest prefix of this stream whose elements satisfy the predicate p.

p
the test predicate.
returns
the longest prefix of this sequence whose elements all satisfy the predicate p.

definition classes: Stream ⇐ LinearSeqLike ⇐ IterableLike ⇐ TraversableLike
def toArray[B >: A](arg0: ClassManifest[B]): Array[B]

Converts this sequence to an array

Converts this sequence to an array.
Note: will not terminate for infinite-sized collections.

B
the type of the elements of the array. A ClassManifest for this type must be available.
returns
an array containing all elements of this sequence.

definition classes: TraversableLike
def toIndexedSeq[B >: A]: IndexedSeq[B]

Converts this sequence to an indexed sequence

Converts this sequence to an indexed sequence.
Note: will not terminate for infinite-sized collections.

definition classes: TraversableLike
def toIterable: Iterable[A]

Converts this sequence to an iterable collection

Converts this sequence to an iterable collection.
Note: Will not terminate for infinite-sized collections.

definition classes: IterableLike ⇐ TraversableLike
def toList: List[A]

Converts this sequence to a list

Converts this sequence to a list.
Note: will not terminate for infinite-sized collections.

definition classes: TraversableLike
def toSeq: Seq[A]

Converts this sequence to a sequence

Converts this sequence to a sequence.
Note: will not terminate for infinite-sized collections.
Overridden for efficiency.

definition classes: SeqLike ⇐ TraversableLike
def toSet[B >: A]: Set[B]

Converts this sequence to a set

Converts this sequence to a set.
Note: will not terminate for infinite-sized collections.

definition classes: TraversableLike
def toStream: Stream[A]

Converts this sequence to a stream

Converts this sequence to a stream.
Note: will not terminate for infinite-sized collections.

definition classes: Stream ⇐ IterableLike ⇐ TraversableLike
def toString(): String

Converts this sequence to a string

Converts this sequence to a string

definition classes: Stream ⇐ SeqLike ⇐ Function1 ⇐ TraversableLike ⇐ AnyRef ⇐ Any
def transpose[B](asTraversable: (A) ⇒ Traversable[B]): CC[CC[B] @scala.annotation.unchecked.uncheckedVariance]

Transposes this sequence of traversable collections into

Transposes this sequence of traversable collections into

definition classes: GenericTraversableTemplate
def union[B >: A, That](that: Seq[B])(bf: CanBuildFrom[Repr, B, That]): That

Produces a new sequence which contains all elements of this sequence and also all elements of a given sequence

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.
Note: will not terminate for infinite-sized collections.
Another way to express this is that xs union ys computes the order-presevring multi-set union of xs and ys. union is hence a counter-oart of diff and intersect which also work on multi-sets.
Note: will not terminate for infinite-sized collections.

B
the element type of the returned sequence.
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 sequence to add.
bf
an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and the new element type B.
returns
a new collection of type That which contains all elements of this sequence followed by all elements of that.

definition classes: SeqLike
def unzip[A1, A2](asPair: (A) ⇒ (A1, A2)): (CC[A1], CC[A2])

Converts this sequence of pairs into two collections of the first and second halfs of each pair

Converts this sequence of pairs into two collections of the first and second halfs of each pair.

asPair
an implicit conversion which asserts that the element type of this sequence is a pair.
returns
a pair sequences, containing the first, respectively second half of each element pair of this sequence.

definition classes: GenericTraversableTemplate
def updated[B >: A, That](index: Int, elem: B)(bf: CanBuildFrom[Repr, B, That]): That

A copy of this sequence with one single replaced element

A copy of this sequence with one single replaced element.

B
the element type of the returned sequence.
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.
index
the position of the replacement
elem
the replacing element
bf
an implicit value of class CanBuildFrom which determines the result class That from the current representation type Repr and the new element type B.
returns
a new collection of type That which is a copy of this sequence with the element at position index replaced by elem.

definition classes: SeqLike
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: SeqLike ⇐ IterableLike ⇐ TraversableLike
def view: SeqView[A, Repr]

Creates a non-strict view of this sequence

Creates a non-strict view of this sequence.

definition classes: SeqLike ⇐ IterableLike ⇐ TraversableLike
def withFilter(p: (A) ⇒ Boolean): WithFilter

Creates a non-strict filter of this sequence

Creates a non-strict filter of this sequence.
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.

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 sequence which satify the predicate p.

definition classes: TraversableLike
def zipAll[B, A1 >: A, That](that: Iterable[B], thisElem: A1, thatElem: B)(bf: CanBuildFrom[Repr, (A1, B), That]): That

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

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.

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 collection of type That 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: IterableLike
def zipWithIndex[A1 >: A, That](bf: CanBuildFrom[Stream[A], (A1, Int), That]): That

Zips this iterable with its indices

Zips this iterable with its indices. s.zipWithIndex is equivalent to s zip s.indices

A1
the type of the first half of the returned pairs (this is always a supertype of the collection's element type A).
That
the class of the returned collection. Where possible, That is the same class as the current collection class Repr, but this depends on the element type (A1, Int) being admissible for that class, which means that an implicit instance of type CanBuildFrom[Repr, (A1, Int), That]. is found.
returns
A new collection of type That containing pairs consisting of all elements of this sequence paired with their index. Indices start at 0.

definition classes: Stream ⇐ IterableLike

Empty

object Empty extends Stream[Nothing]

Inherits

Type Members

class WithFilter extends AnyRef

Value Members

def ++[B >: A, That](that: Iterator[B])(bf: CanBuildFrom[Stream[A], B, That]): That

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

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

def /:[B](z: B)(op: (B, A) ⇒ B): B

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

def :\[B](z: B)(op: (A, B) ⇒ B): B

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

def addString(b: StringBuilder): StringBuilder

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

def andThen[C](k: (B) ⇒ C): PartialFunction[A, C]

def append[B >: A](rest: ⇒ Traversable[B]): Stream[B]

def apply(n: Int): A

def canEqual(that: Any): Boolean

def companion: GenericCompanion[Stream[A][A]]

def compose[A](g: (A) ⇒ T1): (A) ⇒ R

def contains(elem: Any): Boolean

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

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

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

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

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

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

def count(p: (A) ⇒ Boolean): Int

def diff[B >: A, That](that: Seq[B]): Repr

def drop(n: Int): Repr

def dropRight(n: Int): Repr

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

def elements: Iterator[A]

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

def equals(that: Any): Boolean

def equalsWith[B](that: Seq[B])(f: (A, B) ⇒ Boolean): Boolean

def exists(p: (A) ⇒ Boolean): Boolean

def filterNot(p: (A) ⇒ Boolean): Repr

def find(p: (A) ⇒ Boolean): Option[A]

def findIndexOf(p: (A) ⇒ Boolean): Int

def findLastIndexOf(p: (A) ⇒ Boolean): Int

def first: A

def firstOption: Option[A]

def flatten[B](asTraversable: (A) ⇒ Traversable[B]): Stream[B]

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

def forall(p: (A) ⇒ Boolean): Boolean

def force: Stream[A]

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

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

def hasDefiniteSize: Boolean

def hashCode(): Int

def head: Nothing

def headOption: Option[A]

def indexOf[B >: A](elem: B, from: Int): Int

def indexOf[B >: A](elem: B): Int

def indexOfSlice[B >: A](that: Seq[B], from: Int): Int

def indexOfSlice[B >: A](that: Seq[B]): Int

def indexWhere(p: (A) ⇒ Boolean, from: Int): Int

def indexWhere(p: (A) ⇒ Boolean): Int

def indices: Range

def init: Stream[A]

def intersect[B >: A, That](that: Seq[B]): Repr

def isDefinedAt(x: Int): Boolean

def isEmpty: Boolean

def iterator: Iterator[A]

def last: A

def lastIndexOf[B >: A](elem: B, end: Int): Int

def lastIndexOf[B >: A](elem: B): Int

def lastIndexOfSlice[B >: A](that: Seq[B], end: Int): Int

def lastIndexOfSlice[B >: A](that: Seq[B]): Int

def lastIndexWhere(p: (A) ⇒ Boolean, end: Int): Int

def lastIndexWhere(p: (A) ⇒ Boolean): Int

def lastOption: Option[A]

def length: Int

def lengthCompare(len: Int): Int

def lift: (A) ⇒ Option[B]

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

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

def mkString: String