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Scala 3/scala/scala.collection/scala.collection.immutable/Queue

Queue

scala.collection.immutable.Queue
See theQueue companion class
object Queue extends StrictOptimizedSeqFactory[Queue]

This object provides a set of operations to create immutable.Queue values.

Attributes

Companion
class
Source
Queue.scala
Graph
Supertypes
trait SeqFactory[Queue]
trait Pure
trait Serializable
class Object
trait Matchable
class Any
Show all
Self type
Queue.type

Members list

Value members

Concrete methods

override def apply[A](xs: A*): Queue[A]

Creates a immutable queue with the specified elements.

Creates a immutable queue with the specified elements.

Type parameters

A

the type of the immutable queue's elements

Value parameters

elems

the elements of the created immutable queue

Attributes

Returns

a new immutable queue with elements elems

Definition Classes
Source
Queue.scala
def empty[A]: Queue[A]

An empty immutable queue.

An empty immutable queue.

Type parameters

A

the type of the immutable queue's elements

Attributes

Returns

an empty immutable queue of type CC[A]

Source
Queue.scala
def from[A](source: IterableOnce[A]^): Queue[A]

Creates a target immutable queue from an existing source collection

Creates a target immutable queue from an existing source collection

Type parameters

A

the type of the collection’s elements

Value parameters

source

Source collection

Attributes

Returns

a new immutable queue with the elements of source

Source
Queue.scala
def newBuilder[A]: Builder[A, Queue[A]]

Type parameters

A

the type of the immutable queue’s elements

Attributes

Returns

a builder for immutable.Queue objects.

Source
Queue.scala

Inherited methods

override def concat[A](xss: Iterable[A]*): Queue[A]

Concatenates all argument collections into a single immutable queue.

Concatenates all argument collections into a single immutable queue.

Type parameters

A

the element type of the immutable queue

Value parameters

xss

the collections that are to be concatenated.

Attributes

Returns

the concatenation of all the collections.

Definition Classes
Inherited from:
StrictOptimizedSeqFactory
Source
Factory.scala
override def fill[A](n: Int)(elem: => A): Queue[A]

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

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

Type parameters

A

the element type of the immutable queue

Value parameters

elem

the element computation

n

the number of elements contained in the immutable queue.

Attributes

Returns

A immutable queue that contains the results of n evaluations of elem.

Definition Classes
Inherited from:
StrictOptimizedSeqFactory
Source
Factory.scala
def fill[A](n1: Int, n2: Int, n3: Int, n4: Int, n5: Int)(elem: => A): Queue[Queue[Queue[Queue[Queue[A]]]]]

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

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

Type parameters

A

the element type of the immutable queue

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 immutable queue that contains the results of n1 x n2 x n3 x n4 x n5 evaluations of elem.

Inherited from:
IterableFactory
Source
Factory.scala
def fill[A](n1: Int, n2: Int, n3: Int, n4: Int)(elem: => A): Queue[Queue[Queue[Queue[A]]]]

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

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

Type parameters

A

the element type of the immutable queue

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 immutable queue that contains the results of n1 x n2 x n3 x n4 evaluations of elem.

Inherited from:
IterableFactory
Source
Factory.scala
def fill[A](n1: Int, n2: Int, n3: Int)(elem: => A): Queue[Queue[Queue[A]]]

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

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

Type parameters

A

the element type of the immutable queue

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 immutable queue that contains the results of n1 x n2 x n3 evaluations of elem.

Inherited from:
IterableFactory
Source
Factory.scala
def fill[A](n1: Int, n2: Int)(elem: => A): Queue[Queue[A]]

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

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

Type parameters

A

the element type of the immutable queue

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 immutable queue that contains the results of n1 x n2 evaluations of elem.

Inherited from:
IterableFactory
Source
Factory.scala
def iterate[A](start: A, len: Int)(f: A => A): Queue[A]

Produces a immutable queue containing repeated applications of a function to a start value.

Produces a immutable queue containing repeated applications of a function to a start value.

Type parameters

A

the element type of the immutable queue

Value parameters

f

the function that's repeatedly applied

len

the number of elements contained in the immutable queue

start

the start value of the immutable queue

Attributes

Returns

a immutable queue with len values in the sequence start, f(start), f(f(start)), ...

Inherited from:
IterableFactory
Source
Factory.scala
def range[A : Integral](start: A, end: A, step: A): Queue[A]

Produces a immutable queue containing equally spaced values in some integer interval.

Produces a immutable queue containing equally spaced values in some integer interval.

Type parameters

A

the element type of the immutable queue, which must have an Integral instance

Value parameters

end

the end value of the immutable queue (the first value NOT contained)

start

the start value of the immutable queue

step

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

Attributes

Returns

a immutable queue with values start, start + step, ... up to, but excluding end

Inherited from:
IterableFactory
Source
Factory.scala
def range[A : Integral](start: A, end: A): Queue[A]

Produces a immutable queue containing a sequence of increasing of integers.

Produces a immutable queue containing a sequence of increasing of integers.

Type parameters

A

the element type of the immutable queue, which must have an Integral instance

Value parameters

end

the end value of the immutable queue (the first value NOT contained)

start

the first element of the immutable queue

Attributes

Returns

a immutable queue with values start, start + 1, ..., end - 1

Inherited from:
IterableFactory
Source
Factory.scala
override def tabulate[A](n: Int)(f: Int => A): Queue[A]

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

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

Type parameters

A

the element type of the immutable queue

Value parameters

f

The function computing element values

n

The number of elements in the immutable queue

Attributes

Returns

A immutable queue consisting of elements f(0), ..., f(n -1)

Definition Classes
Inherited from:
StrictOptimizedSeqFactory
Source
Factory.scala
def tabulate[A](n1: Int, n2: Int, n3: Int, n4: Int, n5: Int)(f: (Int, Int, Int, Int, Int) => A): Queue[Queue[Queue[Queue[Queue[A]]]]]

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

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

Type parameters

A

the element type of the immutable queue

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 immutable queue 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.

Inherited from:
IterableFactory
Source
Factory.scala
def tabulate[A](n1: Int, n2: Int, n3: Int, n4: Int)(f: (Int, Int, Int, Int) => A): Queue[Queue[Queue[Queue[A]]]]

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

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

Type parameters

A

the element type of the immutable queue

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 immutable queue consisting of elements f(i1, i2, i3, i4) for 0 <= i1 < n1, 0 <= i2 < n2, 0 <= i3 < n3, and 0 <= i4 < n4.

Inherited from:
IterableFactory
Source
Factory.scala
def tabulate[A](n1: Int, n2: Int, n3: Int)(f: (Int, Int, Int) => A): Queue[Queue[Queue[A]]]

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

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

Type parameters

A

the element type of the immutable queue

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 immutable queue consisting of elements f(i1, i2, i3) for 0 <= i1 < n1, 0 <= i2 < n2, and 0 <= i3 < n3.

Inherited from:
IterableFactory
Source
Factory.scala
def tabulate[A](n1: Int, n2: Int)(f: (Int, Int) => A): Queue[Queue[A]]

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

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

Type parameters

A

the element type of the immutable queue

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 immutable queue consisting of elements f(i1, i2) for 0 <= i1 < n1 and 0 <= i2 < n2.

Inherited from:
IterableFactory
Source
Factory.scala
final def unapplySeq[A](x: Queue[A]): UnapplySeqWrapper[A]

Attributes

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

Produces a immutable queue that uses a function f to produce elements of type A and update an internal state of type S.

Produces a immutable queue that uses a function f to produce elements of type A and update an internal state of type S.

Type parameters

A

Type of the elements

S

Type of the internal state

Value parameters

f

Computes the next element (or returns None to signal the end of the collection)

init

State initial value

Attributes

Returns

a immutable queue that produces elements using f until f returns None

Inherited from:
IterableFactory
Source
Factory.scala

Implicits

Inherited implicits

implicit def iterableFactory[A]: Factory[A, Queue[A]]

Attributes

Inherited from:
IterableFactory
Source
Factory.scala
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Copyright (c) 2002-2026, LAMP/EPFL