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Scala 3
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Copyright (c) 2002-2025, LAMP/EPFL
Copyright (c) 2002-2025, LAMP/EPFL
Scala 3/scala/scala.collection/scala.collection.immutable/Stream

Stream

scala.collection.immutable.Stream
See theStream companion class
objectStream extendsSeqFactory[Stream]

Attributes

Companion
class
Deprecated
[Since version 2.13.0]Use LazyList (which is fully lazy) instead of Stream (which has a lazy tail only)
Source
Stream.scala
Graph
Supertypes
classObject
traitMatchable
classAny
Show all
Self type
Stream.type

Members list

Type members

Classlikes

object#::

Attributes

Source
Stream.scala
Supertypes
classObject
traitMatchable
classAny
Self type
#::.type
finalclassCons[A](valhead:A,tl:=>Stream[A]) extendsStream[A]

Attributes

Source
Stream.scala
Supertypes
classStream[A]
traitLinearSeq[A]
traitLinearSeq[A]
classAbstractSeq[A]
traitSeq[A]
traitSeqOps[A,Stream,Stream[A]]
traitIterable[A]
classAbstractSeq[A]
traitSeq[A]
traitEquals
traitSeqOps[A,Stream,Stream[A]]
traitInt=>A
traitIterable[A]
traitIterableOnce[A]
classObject
traitMatchable
classAny
Show all
finalclassDeferrer[A] extendsAnyVal

Attributes

Source
Stream.scala
Supertypes
classAnyVal
traitMatchable
classAny
objectEmpty extendsStream[Nothing]
classSerializationProxy[A](varcoll:Stream[A]) extendsSerializable

This serialization proxy is used for Streams which start with a sequence of evaluated cons cells.

This serialization proxy is used for Streams which start with a sequence of evaluated cons cells. The forced sequence is serialized in a compact, sequential format, followed by the unevaluated tail, which uses standard Java serialization to store the complete structure of unevaluated thunks. This allows the serialization of long evaluated streams without exhausting the stack through recursive serialization of cons cells.

Attributes

Source
Stream.scala
Supertypes
classObject
traitMatchable
classAny
objectcons

An alternative way of building and matching Streams using Stream.cons(hd, tl).

An alternative way of building and matching Streams using Stream.cons(hd, tl).

Attributes

Source
Stream.scala
Supertypes
classObject
traitMatchable
classAny
Self type
cons.type

Value members

Concrete methods

defcontinually[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).

Value parameters

elem

the element composing the resulting Stream

Attributes

Returns

the Stream containing an infinite number of elem

Source
Stream.scala
defempty[A]:Stream[A]

An empty collection

An empty collection

Type parameters

A

the type of the collection's elements

Attributes

Source
Stream.scala
deffrom[A](coll:IterableOnce[A]):Stream[A]

Creates a target collection from an existing source collection

Creates a target collection from an existing source collection

Type parameters

A

the type of the collection’s elements

Value parameters

source

Source collection

Attributes

Returns

a new collection with the elements ofsource

Source
Stream.scala
deffrom(start:Int,step:Int):Stream[Int]

Create an infinite Stream starting atstart and incrementing by stepstep.

Create an infinite Stream starting atstart and incrementing by stepstep.

Value parameters

start

the start value of the Stream

step

the increment value of the Stream

Attributes

Returns

the Stream starting at valuestart.

Source
Stream.scala
deffrom(start:Int):Stream[Int]

Create an infinite Stream starting atstart and incrementing by1.

Create an infinite Stream starting atstart and incrementing by1.

Value parameters

start

the start value of the Stream

Attributes

Returns

the Stream starting at valuestart.

Source
Stream.scala
deffromIterator[A](it:Iterator[A]):Stream[A]

Type parameters

A

type of elements

Value parameters

it

Source iterator

Attributes

Returns

AStream[A] that gets its elements from the givenIterator.

Source
Stream.scala
defiterate[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.

Value parameters

f

the function that's repeatedly applied

start

the start value of the Stream

Attributes

Returns

the Stream returning the infinite sequence of valuesstart, f(start), f(f(start)), ...

Source
Stream.scala
overridedefnewBuilder[A]:Builder[A,Stream[A]]

Type parameters

A

the type of the collection’s elements

Attributes

Returns

A builder forIterable objects.

Definition Classes
Source
Stream.scala

Inherited methods

defapply[A](elems:A*):Stream[A]

Creates a collection with the specified elements.

Creates a collection with the specified elements.

Type parameters

A

the type of the collection's elements

Value parameters

elems

the elements of the created collection

Attributes

Returns

a new collection with elementselems

Inherited from:
IterableFactory
Source
Factory.scala
defconcat[A](xss:Iterable[A]*):Stream[A]

Concatenates all argument collections into a single collection.

Concatenates all argument collections into a single collection.

Value parameters

xss

the collections that are to be concatenated.

Attributes

Returns

the concatenation of all the collections.

Inherited from:
IterableFactory
Source
Factory.scala
deffill[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.

Value parameters

elem

the element computation

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 3rd dimension

n4

the number of elements in the 4th dimension

n5

the number of elements in the 5th dimension

Attributes

Returns

A collection that contains the results ofn1 x n2 x n3 x n4 x n5 evaluations ofelem.

Inherited from:
IterableFactory
Source
Factory.scala
deffill[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.

Value parameters

elem

the element computation

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 3rd dimension

n4

the number of elements in the 4th dimension

Attributes

Returns

A collection that contains the results ofn1 x n2 x n3 x n4 evaluations ofelem.

Inherited from:
IterableFactory
Source
Factory.scala
deffill[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.

Value parameters

elem

the element computation

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 3rd dimension

Attributes

Returns

A collection that contains the results ofn1 x n2 x n3 evaluations ofelem.

Inherited from:
IterableFactory
Source
Factory.scala
deffill[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.

Value parameters

elem

the element computation

n1

the number of elements in the 1st dimension

n2

the number of elements in the 2nd dimension

Attributes

Returns

A collection that contains the results ofn1 x n2 evaluations ofelem.

Inherited from:
IterableFactory
Source
Factory.scala
deffill[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.

Value parameters

elem

the element computation

n

the number of elements contained in the collection.

Attributes

Returns

A collection that contains the results ofn evaluations ofelem.

Inherited from:
IterableFactory
Source
Factory.scala
defiterate[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.

Value parameters

f

the function that's repeatedly applied

len

the number of elements contained in the collection

start

the start value of the collection

Attributes

Returns

a collection withlen values in the sequencestart, f(start), f(f(start)), ...

Inherited from:
IterableFactory
Source
Factory.scala
defrange[A :Integral](start:A,end:A,step:A):Stream[A]

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

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

Value parameters

end

the end value of the collection (the first value NOT contained)

start

the start value of the collection

step

the difference between successive elements of the collection (must be positive or negative)

Attributes

Returns

a collection with valuesstart, start + step, ... up to, but excludingend

Inherited from:
IterableFactory
Source
Factory.scala
defrange[A :Integral](start:A,end:A):Stream[A]

Produces a collection containing a sequence of increasing of integers.

Produces a collection containing a sequence of increasing of integers.

Value parameters

end

the end value of the collection (the first value NOT contained)

start

the first element of the collection

Attributes

Returns

a collection with valuesstart, start + 1, ..., end - 1

Inherited from:
IterableFactory
Source
Factory.scala
deftabulate[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.

Value parameters

f

The function computing element values

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 3rd dimension

n4

the number of elements in the 4th dimension

n5

the number of elements in the 5th dimension

Attributes

Returns

A collection consisting of elementsf(i1, i2, i3, i4, i5) for0 <= i1 < n1,0 <= i2 < n2,0 <= i3 < n3,0 <= i4 < n4, and0 <= i5 < n5.

Inherited from:
IterableFactory
Source
Factory.scala
deftabulate[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.

Value parameters

f

The function computing element values

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 3rd dimension

n4

the number of elements in the 4th dimension

Attributes

Returns

A collection consisting of elementsf(i1, i2, i3, i4) for0 <= i1 < n1,0 <= i2 < n2,0 <= i3 < n3, and0 <= i4 < n4.

Inherited from:
IterableFactory
Source
Factory.scala
deftabulate[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.

Value parameters

f

The function computing element values

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 3rd dimension

Attributes

Returns

A collection consisting of elementsf(i1, i2, i3) for0 <= i1 < n1,0 <= i2 < n2, and0 <= i3 < n3.

Inherited from:
IterableFactory
Source
Factory.scala
deftabulate[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.

Value parameters

f

The function computing element values

n1

the number of elements in the 1st dimension

n2

the number of elements in the 2nd dimension

Attributes

Returns

A collection consisting of elementsf(i1, i2) for0 <= i1 < n1 and0 <= i2 < n2.

Inherited from:
IterableFactory
Source
Factory.scala
deftabulate[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.

Value parameters

f

The function computing element values

n

The number of elements in the collection

Attributes

Returns

A collection consisting of elementsf(0), ..., f(n -1)

Inherited from:
IterableFactory
Source
Factory.scala
finaldefunapplySeq[A](x:Stream[A]):UnapplySeqWrapper[A]

Attributes

Inherited from:
SeqFactory
Source
Factory.scala
defunfold[A,S](init:S)(f:S=>Option[(A,S)]):Stream[A]

Produces a collection that uses a functionf to produce elements of typeA and update an internal state of typeS.

Produces a collection that uses a functionf to produce elements of typeA and update an internal state of typeS.

Type parameters

A

Type of the elements

S

Type of the internal state

Value parameters

f

Computes the next element (or returnsNone to signal the end of the collection)

init

State initial value

Attributes

Returns

a collection that produces elements usingf untilf returnsNone

Inherited from:
IterableFactory
Source
Factory.scala

Implicits

Implicits

implicitdeftoDeferrer[A](l:=>Stream[A]):Deferrer[A]

Attributes

Source
Stream.scala

Inherited implicits

implicitdefiterableFactory[A]:Factory[A,Stream[A]]

Attributes

Inherited from:
IterableFactory
Source
Factory.scala
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Copyright (c) 2002-2025, LAMP/EPFL
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