scala.collection.immutable.Stream

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Type Members

type Coll = scala.collection.immutable.Stream[_]

The underlying collection type with unknown element type

The underlying collection type with unknown element type
definition classes: GenericCompanion
class Cons [+A] extends Stream[A]

A lazy cons cell, from which streams are built.
class ConsWrapper [A] extends AnyRef

A wrapper class that adds #:: for cons and #::: for concat as operations to streams.
class GenericCanBuildFrom [A] extends CanBuildFrom[CC[_], A, CC[A]]

A generic implementation of the CanBuildFrom trait, which forwards all calls to apply(from) to the genericBuilder method of collection from, and which forwards all calls of apply() to the newBuilder method of this factory.
class StreamBuilder [A] extends LazyBuilder[A, Stream[A]]

A builder for streams
class StreamCanBuildFrom [A] extends GenericCanBuildFrom[A]

The factory for streams.

Value Members

def != (arg0: AnyRef) : Boolean

attributes: final
definition classes: AnyRef
def != (arg0: Any) : Boolean

o != arg0 is the same as !(o == (arg0)).

o != arg0 is the same as !(o == (arg0)).
arg0
the object to compare against this object for dis-equality.
returns
false if the receiver object is equivalent to the argument; true otherwise.
attributes: final
definition classes: Any
def ## () : Int

attributes: final
definition classes: AnyRef → Any
object #:: extends AnyRef

An extractor that allows to pattern match streams with #::.
def $asInstanceOf [T0] () : T0

attributes: final
definition classes: AnyRef
def $isInstanceOf [T0] () : Boolean

attributes: final
definition classes: AnyRef
def == (arg0: AnyRef) : Boolean

o == arg0 is the same as if (o eq null) arg0 eq null else o.equals(arg0).

o == arg0 is the same as if (o eq null) arg0 eq null else o.equals(arg0).
arg0
the object to compare against this object for equality.
returns
true if the receiver object is equivalent to the argument; false otherwise.
attributes: final
definition classes: AnyRef
def == (arg0: Any) : Boolean

o == arg0 is the same as o.equals(arg0).

o == arg0 is the same as o.equals(arg0).
arg0
the object to compare against this object for equality.
returns
true if the receiver object is equivalent to the argument; false otherwise.
attributes: final
definition classes: Any
object Empty extends Stream[Nothing]
def apply [A] (xs: A*) : Stream[A]

A stream consisting of given elements@tparam A the type of the collection's elements

A stream consisting of given elements@tparam A the type of the collection's elements
returns
a new collection with elements elems
definition classes: Stream → GenericCompanion
def asInstanceOf [T0] : T0

This method is used to cast the receiver object to be of type T0.

This method is used to 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 expression1.asInstanceOf[String] will throw a ClassCastException at runtime, while the expressionList(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 typed.
returns
the receiver object.
attributes: final
definition classes: Any
implicit def canBuildFrom [A] : CanBuildFrom[Coll, A, Stream[A]]

attributes: implicit
def clone () : AnyRef

This method creates and returns a copy of the receiver object.

This method creates and returns 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
definition classes: AnyRef
def concat [A] (xs: Iterator[Stream[A]]) : Stream[A]

The concatenation of all streams returned by an iterator
The concatenation of all streams returned by an iterator
1. use xs.toStream.flatten instead
def concat [A] (xs: Iterable[Stream[A]]) : Stream[A]

The concatenation of a sequence of streams
The concatenation of a sequence of streams
1. use xs.flatten instead
def concat [A] (xss: Traversable[A]*) : Stream[A]

Concatenates all argument collections into a single collection.

Concatenates all argument collections into a single collection.
xss
the collections that are to be concatenated.
returns
the concatenation of all the collections.
definition classes: TraversableFactory
object cons extends AnyRef

An alternative way of building and matching Streams using Stream.
implicit def consWrapper [A] (stream: ⇒ Stream[A]) : ConsWrapper[A]

A wrapper method that adds #:: for cons and #::: for concat as operations to streams.

A wrapper method that adds #:: for cons and #::: for concat as operations to streams.
attributes: implicit
def const [A] (elem: A) : Stream[A]

Create an infinite stream containing the given element.
Create an infinite stream containing the given element.
elem
the element composing the resulting stream
returns
the stream containing an infinite number of elem
1. use continually' instead
def continually [A] (elem: ⇒ A) : Stream[A]

Create an infinite stream containing the given element expression (which is computed for each occurrence)

Create an infinite stream containing the given element expression (which is computed for each occurrence)
elem
the element composing the resulting stream
returns
the stream containing an infinite number of elem
def empty [A] : Stream[A]

The empty stream@tparam A the type of the collection's elements

The empty stream@tparam A the type of the collection's elements
definition classes: Stream → GenericCompanion
def eq (arg0: AnyRef) : Boolean

This method is used to test whether the argument (arg0) is a reference to the receiver object (this).

This method is used to test whether the argument (arg0) is a reference to the receiver object (this).
The eq method implements an [http://en.wikipedia.org/wiki/Equivalence_relation equivalence relation] on non-null instances of AnyRef: * It is reflexive: for any non-null instance x of type AnyRef, x.eq(x) returns true. * It is symmetric: for any non-null instances x and y of type AnyRef, x.eq(y) returns true if and only if y.eq(x) returns true. * It is transitive: for any non-null instances x, y, and z of type AnyRef if x.eq(y) returns true and y.eq(z) returns true, then x.eq(z) returns true.
Additionally, the eq method has three other 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).
arg0
the object to compare against this object for reference equality.
returns
true if the argument is a reference to the receiver object; false otherwise.
attributes: final
definition classes: AnyRef
def equals (arg0: Any) : Boolean

This method is used to compare the receiver object (this) with the argument object (arg0) for equivalence.

This method is used to compare the receiver object (this) with the argument object (arg0) for equivalence.
The default implementations of this method is an [http://en.wikipedia.org/wiki/Equivalence_relation equivalence relation]: * It is reflexive: for any instance x of type Any, x.equals(x) should return true. * It is symmetric: for any instances x and y of type Any, x.equals(y) should return true if and only if y.equals(x) returns true. * It is transitive: for any instances x, y, and z of type AnyRef if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
If you override this method, you should verify that your implementation remains an equivalence relation. Additionally, when overriding this method it is often necessary to override hashCode to ensure that objects that are "equal" (o1.equals(o2) returns true) hash to the same scala.Int (o1.hashCode.equals(o2.hashCode)).
arg0
the object to compare against this object for equality.
returns
true if the receiver object is equivalent to the argument; false otherwise.
definition classes: AnyRef → Any
def fill [A] (n: Int)(elem: ⇒ A) : Stream[A]

Produces a collection containing the results of some element computation a number of times.

Produces a collection containing the results of some element computation a number of times.
n
the number of elements contained in the collection.
elem
the element computation
returns
A collection that contains the results of n evaluations of elem.
definition classes: Stream → TraversableFactory
def fill [A] (n1: Int, n2: Int, n3: Int, n4: Int, n5: Int)(elem: ⇒ A) : Stream[Stream[Stream[Stream[Stream[A]]]]]

Produces a five-dimensional collection containing the results of some element computation a number of times.

Produces a five-dimensional collection containing the results of some element computation a number of times.
n1
the number of elements in the 1st dimension
n2
the number of elements in the 2nd dimension
n3
the number of elements in the 3nd dimension
n4
the number of elements in the 4th dimension
n5
the number of elements in the 5th dimension
elem
the element computation
returns
A collection that contains the results of n1 x n2 x n3 x n4 x n5 evaluations of elem.
definition classes: TraversableFactory
def fill [A] (n1: Int, n2: Int, n3: Int, n4: Int)(elem: ⇒ A) : Stream[Stream[Stream[Stream[A]]]]

Produces a four-dimensional collection containing the results of some element computation a number of times.

Produces a four-dimensional collection containing the results of some element computation a number of times.
n1
the number of elements in the 1st dimension
n2
the number of elements in the 2nd dimension
n3
the number of elements in the 3nd dimension
n4
the number of elements in the 4th dimension
elem
the element computation
returns
A collection that contains the results of n1 x n2 x n3 x n4 evaluations of elem.
definition classes: TraversableFactory
def fill [A] (n1: Int, n2: Int, n3: Int)(elem: ⇒ A) : Stream[Stream[Stream[A]]]

Produces a three-dimensional collection containing the results of some element computation a number of times.

Produces a three-dimensional collection containing the results of some element computation a number of times.
n1
the number of elements in the 1st dimension
n2
the number of elements in the 2nd dimension
n3
the number of elements in the 3nd dimension
elem
the element computation
returns
A collection that contains the results of n1 x n2 x n3 evaluations of elem.
definition classes: TraversableFactory
def fill [A] (n1: Int, n2: Int)(elem: ⇒ A) : Stream[Stream[A]]

Produces a two-dimensional collection containing the results of some element computation a number of times.

Produces a two-dimensional collection containing the results of some element computation a number of times.
n1
the number of elements in the 1st dimension
n2
the number of elements in the 2nd dimension
elem
the element computation
returns
A collection that contains the results of n1 x n2 evaluations of elem.
definition classes: TraversableFactory
def finalize () : Unit

This method is called by the garbage collector on the receiver object when garbage collection determines that there are no more references to the object.

This method is called by the garbage collector on the receiver object when garbage collection determines that there are no more references to the object.
The details of when and if the finalize method are invoked, as well as the interaction between finalizeand non-local returns and exceptions, are all platform dependent.
attributes: protected
definition classes: AnyRef
def from (start: Int) : Stream[Int]

Create an infinite stream starting at startand incrementing by 1.

Create an infinite stream starting at startand incrementing by 1.
start
the start value of the stream
returns
the stream starting at value start.
def from (start: Int, step: Int) : Stream[Int]

Create an infinite stream starting at startand incrementing by step step

Create an infinite stream starting at startand incrementing by step step
start
the start value of the stream
step
the increment value of the stream
returns
the stream starting at value start.
def fromIterator [A] (it: Iterator[A]) : Stream[A]

A stream containing all elements of a given iterator, in the order they are produced.
A stream containing all elements of a given iterator, in the order they are produced.
it
The iterator producing the stream's elements
1. use it.toStream instead
def getClass () : java.lang.Class[_ <: java.lang.Object]

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

Returns 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.
attributes: final
definition classes: AnyRef
def hashCode () : Int

Returns a hash code value for the object.

Returns 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 the object.
definition classes: AnyRef → Any
def isInstanceOf [T0] : Boolean

This method is used to test whether the dynamic type of the receiver object is T0.

This method is used to test whether the dynamic type of the receiver object is T0.
Note that the test result of the test is modulo Scala's erasure semantics. Therefore the expression1.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 requested typed.
returns
true if the receiver object is an instance of erasure of type T0; false otherwise.
attributes: final
definition classes: Any
def iterate [A] (start: A, len: Int)(f: (A) ⇒ A) : Stream[A]

Produces a collection containing repeated applications of a function to a start value.

Produces a collection containing repeated applications of a function to a start value.
start
the start value of the collection
len
the number of elements contained inthe collection
f
the function that's repeatedly applied
returns
a collection with len values in the sequence start, f(start), f(f(start)), ...
definition classes: Stream → TraversableFactory
def iterate [A] (start: A)(f: (A) ⇒ A) : Stream[A]

An infinite stream that repeatedly applies a given function to a start value.

An infinite stream that repeatedly applies a given function to a start value.
start
the start value of the stream
f
the function that's repeatedly applied
returns
the stream returning the infinite sequence of values start, f(start), f(f(start)), ...
lazy val lazy_:: : #::
1. use #:: instead
def make [A] (n: Int, elem: A) : Stream[A]

Create a stream containing several copies of an element.
Create a stream containing several copies of an element.
n
the length of the resulting stream
elem
the element composing the resulting stream
returns
the stream composed of n elements all equal to elem
1. use fill(n, elem) instead
def ne (arg0: AnyRef) : Boolean

o.ne(arg0) is the same as !(o.eq(arg0)).

o.ne(arg0) is the same as !(o.eq(arg0)).
arg0
the object to compare against this object for reference dis-equality.
returns
false if the argument is not a reference to the receiver object; true otherwise.
attributes: final
definition classes: AnyRef
def newBuilder [A] : Builder[A, Stream[A]]

Creates a new builder for a stream@tparam A the type of the collection's elements

Creates a new builder for a stream@tparam A the type of the collection's elements
definition classes: Stream → GenericCompanion
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.
attributes: final
definition classes: AnyRef
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.
attributes: final
definition classes: AnyRef
def range (start: Int, end: Int, step: (Int) ⇒ Int) : Stream[Int]

Create a stream with element valuesv_n+1 = step(v_n)where v₀ = startand elements are in the range between start (inclusive) and end (exclusive)
Create a stream with element valuesv_n+1 = step(v_n)where v₀ = startand elements are in the range between start (inclusive) and end (exclusive)
start
the start value of the stream
end
the end value of the stream
step
the increment function of the stream, must be monotonically increasing or decreasing
returns
the stream starting at value start.
1. use iterate' instead.
def range (start: Int, end: Int, step: Int) : Stream[Int]

Produces a collection containing equally spaced values in some integer interval.

Produces a collection containing equally spaced values in some integer interval.
start
the start value of the collection
end
the end value of the collection (the first value NOT contained)
step
the difference between successive elements of the collection (must be positive or negative)
returns
a collection with values start, start + step, ... up to, but excluding end
definition classes: Stream → TraversableFactory
def range (start: Int, end: Int) : Stream[Int]

Produces a collection containing a sequence of increasing of integers.

Produces a collection containing a sequence of increasing of integers.
end
the end value of the collection (the first value NOT contained)
returns
a collection with values start, start + 1, ..., end - 1
definition classes: TraversableFactory
def synchronized [T0] (arg0: T0) : T0

attributes: final
definition classes: AnyRef
def tabulate [A] (n: Int)(f: (Int) ⇒ A) : Stream[A]

Produces a collection containing values of a given function over a range of integer values starting from 0.

Produces a collection containing values of a given function over a range of integer values starting from 0.
n
The number of elements in the collection
f
The function computing element values
returns
A collection consisting of elements f(0), ..., f(n -1)
definition classes: Stream → TraversableFactory
def tabulate [A] (n1: Int, n2: Int, n3: Int, n4: Int, n5: Int)(f: (Int, Int, Int, Int, Int) ⇒ A) : Stream[Stream[Stream[Stream[Stream[A]]]]]

Produces a five-dimensional collection containing values of a given function over ranges of integer values starting from 0.

Produces a five-dimensional collection containing values of a given function over ranges of integer values starting from 0.
n1
the number of elements in the 1st dimension
n2
the number of elements in the 2nd dimension
n3
the number of elements in the 3nd dimension
n4
the number of elements in the 4th dimension
n5
the number of elements in the 5th dimension
f
The function computing element values
returns
A collection consisting of elements f(i1, i2, i3, i4, i5) for 0 <= i1 < n1, 0 <= i2 < n2, 0 <= i3 < n3, 0 <= i4 < n4, and 0 <= i5 < n5.
definition classes: TraversableFactory
def tabulate [A] (n1: Int, n2: Int, n3: Int, n4: Int)(f: (Int, Int, Int, Int) ⇒ A) : Stream[Stream[Stream[Stream[A]]]]

Produces a four-dimensional collection containing values of a given function over ranges of integer values starting from 0.

Produces a four-dimensional collection containing values of a given function over ranges of integer values starting from 0.
n1
the number of elements in the 1st dimension
n2
the number of elements in the 2nd dimension
n3
the number of elements in the 3nd dimension
n4
the number of elements in the 4th dimension
f
The function computing element values
returns
A collection consisting of elements f(i1, i2, i3, i4) for 0 <= i1 < n1, 0 <= i2 < n2, 0 <= i3 < n3, and 0 <= i4 < n4.
definition classes: TraversableFactory
def tabulate [A] (n1: Int, n2: Int, n3: Int)(f: (Int, Int, Int) ⇒ A) : Stream[Stream[Stream[A]]]

Produces a three-dimensional collection containing values of a given function over ranges of integer values starting from 0.

Produces a three-dimensional collection containing values of a given function over ranges of integer values starting from 0.
n1
the number of elements in the 1st dimension
n2
the number of elements in the 2nd dimension
n3
the number of elements in the 3nd dimension
f
The function computing element values
returns
A collection consisting of elements f(i1, i2, i3) for 0 <= i1 < n1, 0 <= i2 < n2, and 0 <= i3 < n3.
definition classes: TraversableFactory
def tabulate [A] (n1: Int, n2: Int)(f: (Int, Int) ⇒ A) : Stream[Stream[A]]

Produces a two-dimensional collection containing values of a given function over ranges of integer values starting from 0.

Produces a two-dimensional collection containing values of a given function over ranges of integer values starting from 0.
n1
the number of elements in the 1st dimension
n2
the number of elements in the 2nd dimension
f
The function computing element values
returns
A collection consisting of elements f(i1, i2) for 0 <= i1 < n1 and 0 <= i2 < n2.
definition classes: TraversableFactory
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: AnyRef → Any
def unapplySeq [A] (x: Stream[A]) : Some[Stream[A]]

This method is called in a pattern match { case Seq(.

This method is called in a pattern match { case Seq(...) => }.
x
the selector value
returns
sequence wrapped in an option, if this is a Seq, otherwise none
definition classes: SeqFactory
def wait () : Unit

attributes: final
definition classes: AnyRef
def wait (arg0: Long, arg1: Int) : Unit

attributes: final
definition classes: AnyRef
def wait (arg0: Long) : Unit

attributes: final
definition classes: AnyRef

Stream

object Stream extends SeqFactory[Stream]

Type Members

type Coll = scala.collection.immutable.Stream[_]

Value Members

def != (arg0: AnyRef) : Boolean

def != (arg0: Any) : Boolean

def ## () : Int

def $asInstanceOf [T0] () : T0

def $isInstanceOf [T0] () : Boolean

def == (arg0: AnyRef) : Boolean

def == (arg0: Any) : Boolean

def apply [A] (xs: A*) : Stream[A]

def asInstanceOf [T0] : T0

implicit def canBuildFrom [A] : CanBuildFrom[Coll, A, Stream[A]]

def clone () : AnyRef

def concat [A] (xs: Iterator[Stream[A]]) : Stream[A]

def concat [A] (xs: Iterable[Stream[A]]) : Stream[A]

def concat [A] (xss: Traversable[A]*) : Stream[A]

implicit def consWrapper [A] (stream: ⇒ Stream[A]) : ConsWrapper[A]

def const [A] (elem: A) : Stream[A]

def continually [A] (elem: ⇒ A) : Stream[A]

def empty [A] : Stream[A]

def eq (arg0: AnyRef) : Boolean

def equals (arg0: Any) : Boolean

def fill [A] (n: Int)(elem: ⇒ A) : Stream[A]

def fill [A] (n1: Int, n2: Int, n3: Int, n4: Int, n5: Int)(elem: ⇒ A) : Stream[Stream[Stream[Stream[Stream[A]]]]]

def fill [A] (n1: Int, n2: Int, n3: Int, n4: Int)(elem: ⇒ A) : Stream[Stream[Stream[Stream[A]]]]

def fill [A] (n1: Int, n2: Int, n3: Int)(elem: ⇒ A) : Stream[Stream[Stream[A]]]

def fill [A] (n1: Int, n2: Int)(elem: ⇒ A) : Stream[Stream[A]]

def finalize () : Unit

def from (start: Int) : Stream[Int]

def from (start: Int, step: Int) : Stream[Int]

def fromIterator [A] (it: Iterator[A]) : Stream[A]

def getClass () : java.lang.Class[_ <: java.lang.Object]

def hashCode () : Int

def isInstanceOf [T0] : Boolean

def iterate [A] (start: A, len: Int)(f: (A) ⇒ A) : Stream[A]

def iterate [A] (start: A)(f: (A) ⇒ A) : Stream[A]

lazy val lazy_:: : #::

def make [A] (n: Int, elem: A) : Stream[A]

def ne (arg0: AnyRef) : Boolean

def newBuilder [A] : Builder[A, Stream[A]]

def notify () : Unit

def notifyAll () : Unit

def range (start: Int, end: Int, step: (Int) ⇒ Int) : Stream[Int]

def range (start: Int, end: Int, step: Int) : Stream[Int]

def range (start: Int, end: Int) : Stream[Int]

def synchronized [T0] (arg0: T0) : T0

def tabulate [A] (n: Int)(f: (Int) ⇒ A) : Stream[A]

def tabulate [A] (n1: Int, n2: Int, n3: Int, n4: Int, n5: Int)(f: (Int, Int, Int, Int, Int) ⇒ A) : Stream[Stream[Stream[Stream[Stream[A]]]]]

def tabulate [A] (n1: Int, n2: Int, n3: Int, n4: Int)(f: (Int, Int, Int, Int) ⇒ A) : Stream[Stream[Stream[Stream[A]]]]

def tabulate [A] (n1: Int, n2: Int, n3: Int)(f: (Int, Int, Int) ⇒ A) : Stream[Stream[Stream[A]]]

def tabulate [A] (n1: Int, n2: Int)(f: (Int, Int) ⇒ A) : Stream[Stream[A]]

def toString () : String

def unapplySeq [A] (x: Stream[A]) : Some[Stream[A]]

def wait () : Unit

def wait (arg0: Long, arg1: Int) : Unit

def wait (arg0: Long) : Unit

Inherited from SeqFactory[Stream]

Inherited from TraversableFactory[Stream]

Inherited from GenericCompanion[Stream]

Inherited from AnyRef

Inherited from Any