Object scala.collection.immutable.LazyList

Companion class LazyList

object LazyList extends SeqFactory[LazyList]

This object provides a set of operations to create LazyList values.

Annotations
@SerialVersionUID()
Source
LazyList.scala
Linear Supertypes
SeqFactory[LazyList], IterableFactory[LazyList], java.io.Serializable, AnyRef, Any

Type Members

final class Deferrer[A] extends AnyVal

final class SerializationProxy[A] extends Serializable

This serialization proxy is used for LazyLists 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 lazy lists without exhausting the stack through recursive serialization of cons cells.

Annotations
@SerialVersionUID()

Value Members

final def !=(arg0: Any): Boolean

Test two objects for inequality.

returns

true if !(this == that), false otherwise.

Definition Classes
AnyRef → Any

final def ##(): Int

Equivalent to x.hashCode except for boxed numeric types and null. For numerics, it returns a hash value which is consistent with value equality: if two value type instances compare as true, then ## will produce the same hash value for each of them. For null returns a hashcode where null.hashCode throws a NullPointerException.

returns

a hash value consistent with ==

Definition Classes
AnyRef → Any

final def ==(arg0: Any): Boolean

The expression x == that is equivalent to if (x eq null) that eq null else x.equals(that).

returns

true if the receiver object is equivalent to the argument; false otherwise.

Definition Classes
AnyRef → Any

def apply[A](elems: A*): LazyList[A]

Creates a collection with the specified elements.

A

the type of the collection's elements

elems

the elements of the created collection

returns

a new collection with elements elems

Definition Classes
IterableFactory

final def asInstanceOf[T0]: T0

Cast the receiver object to be of type T0.

Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression 1.asInstanceOf[String] will throw a ClassCastException at runtime, while the expression List(1).asInstanceOf[List[String]] will not. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested type.

returns

the receiver object.

Definition Classes
Any
Exceptions thrown

ClassCastException if the receiver object is not an instance of the erasure of type T0.

def clone(): AnyRef

Create a copy of the receiver object.

The default implementation of the clone method is platform dependent.

returns

a copy of the receiver object.

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.CloneNotSupportedException]) @native()
Note

not specified by SLS as a member of AnyRef

def concat[A](xss: collection.Iterable[A]*): LazyList[A]

Concatenates all argument collections into a single lazy list.

xss

the collections that are to be concatenated.

returns

the concatenation of all the collections.

Definition Classes
LazyListIterableFactory

def continually[A](elem: => A): LazyList[A]

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

elem

the element composing the resulting LazyList

returns

the LazyList containing an infinite number of elem

def empty[A]: LazyList[A]

An empty collection

A

the type of the lazy list's elements

Definition Classes
LazyListIterableFactory

final def eq(arg0: AnyRef): Boolean

Tests whether the argument (that) is a reference to the receiver object (this).

The eq method implements an equivalence relation on non-null instances of AnyRef, and has three additional properties:

    It is consistent: for any non-null instances x and y of type AnyRef, multiple invocations of x.eq(y) consistently returns true or consistently returns false.For any non-null instance x of type AnyRef, x.eq(null) and null.eq(x) returns false. null.eq(null) returns true.

When overriding the equals or hashCode methods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2), they should be equal to each other (o1 == o2) and they should hash to the same value (o1.hashCode == o2.hashCode).

returns

true if the argument is a reference to the receiver object; false otherwise.

Definition Classes
AnyRef

def equals(arg0: AnyRef): Boolean

The equality method for reference types. Default implementation delegates to eq.

See also equals in scala.Any.

returns

true if the receiver object is equivalent to the argument; false otherwise.

Definition Classes
AnyRef → Any

def fill[A](n: Int)(elem: => A): LazyList[A]

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

n

the number of elements contained in the lazy list.

elem

the element computation

returns

A lazy list that contains the results of n evaluations of elem.

Definition Classes
LazyListIterableFactory

def fill[A](n1: Int, n2: Int, n3: Int, n4: Int, n5: Int)(elem: => A): LazyList[LazyList[LazyList[LazyList[LazyList[A]]]]]

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 3rd 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
IterableFactory

def fill[A](n1: Int, n2: Int, n3: Int, n4: Int)(elem: => A): LazyList[LazyList[LazyList[LazyList[A]]]]

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 3rd 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
IterableFactory

def fill[A](n1: Int, n2: Int, n3: Int)(elem: => A): LazyList[LazyList[LazyList[A]]]

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 3rd dimension

elem

the element computation

returns

A collection that contains the results of n1 x n2 x n3 evaluations of elem.

Definition Classes
IterableFactory

def fill[A](n1: Int, n2: Int)(elem: => A): LazyList[LazyList[A]]

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
IterableFactory

def finalize(): Unit

Called by the garbage collector on the receiver object when there are no more references to the object.

The details of when and if the finalize method is invoked, as well as the interaction between finalize and non-local returns and exceptions, are all platform dependent.

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.Throwable])
Note

not specified by SLS as a member of AnyRef

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

Create an infinite LazyList starting at start and incrementing by 1.

start

the start value of the LazyList

returns

the LazyList starting at value start.

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

Create an infinite LazyList starting at start and incrementing by step step.

start

the start value of the LazyList

step

the increment value of the LazyList

returns

the LazyList starting at value start.

def from[A](coll: IterableOnce[A]): LazyList[A]

Creates a target lazy list from an existing source collection

A

the type of the collection’s elements

returns

a new lazy list with the elements of source

Definition Classes
LazyListIterableFactory

final def getClass(): Class[_ <: AnyRef]

Returns the runtime class representation of the object.

returns

a class object corresponding to the runtime type of the receiver.

Definition Classes
AnyRef → Any
Annotations
@native()

def hashCode(): Int

The hashCode method for reference types. See hashCode in scala.Any.

returns

the hash code value for this object.

Definition Classes
AnyRef → Any
Annotations
@native()

final def isInstanceOf[T0]: Boolean

Test whether the dynamic type of the receiver object is T0.

Note that the result of the test is modulo Scala's erasure semantics. Therefore the expression 1.isInstanceOf[String] will return false, while the expression List(1).isInstanceOf[List[String]] will return true. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the specified type.

returns

true if the receiver object is an instance of erasure of type T0; false otherwise.

Definition Classes
Any

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

Definition Classes
IterableFactory

def iterate[A](start: => A)(f: (A) => A): LazyList[A]

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

start

the start value of the LazyList

f

the function that's repeatedly applied

returns

the LazyList returning the infinite sequence of values start, f(start), f(f(start)), ...

def iterate[A](start: A, len: Int)(f: (A) => A): LazyList[A]

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 in the 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
IterableFactory

final def ne(arg0: AnyRef): Boolean

Equivalent to !(this eq that).

returns

true if the argument is not a reference to the receiver object; false otherwise.

Definition Classes
AnyRef

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

The builder returned by this method only evaluates elements of collections added to it as needed.

A

the type of the lazy list’s elements

returns

A builder for LazyList objects.

Definition Classes
LazyListIterableFactory

final def notify(): Unit

Wakes up a single thread that is waiting on the receiver object's monitor.

Definition Classes
AnyRef
Annotations
@native()
Note

not specified by SLS as a member of AnyRef

final def notifyAll(): Unit

Wakes up all threads that are waiting on the receiver object's monitor.

Definition Classes
AnyRef
Annotations
@native()
Note

not specified by SLS as a member of AnyRef

def range[A](start: A, end: A, step: A)(implicit arg0: Integral[A]): LazyList[A]

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
IterableFactory

def range[A](start: A, end: A)(implicit arg0: Integral[A]): LazyList[A]

Produces a collection containing a sequence of increasing of integers.

start

the first element of the collection

end

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

returns

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

Definition Classes
IterableFactory

final def synchronized[T0](arg0: => T0): T0

Definition Classes
AnyRef

def tabulate[A](n: Int)(f: (Int) => A): LazyList[A]

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

n

The number of elements in the lazy list

f

The function computing element values

returns

A lazy list consisting of elements f(0), ..., f(n -1)

Definition Classes
LazyListIterableFactory

def tabulate[A](n1: Int, n2: Int, n3: Int, n4: Int, n5: Int)(f: (Int, Int, Int, Int, Int) => A): LazyList[LazyList[LazyList[LazyList[LazyList[A]]]]]

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 3rd 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
IterableFactory

def tabulate[A](n1: Int, n2: Int, n3: Int, n4: Int)(f: (Int, Int, Int, Int) => A): LazyList[LazyList[LazyList[LazyList[A]]]]

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 3rd 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
IterableFactory

def tabulate[A](n1: Int, n2: Int, n3: Int)(f: (Int, Int, Int) => A): LazyList[LazyList[LazyList[A]]]

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 3rd 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
IterableFactory

def tabulate[A](n1: Int, n2: Int)(f: (Int, Int) => A): LazyList[LazyList[A]]

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
IterableFactory

implicit def toDeferrer[A](l: => LazyList[A]): Deferrer[A]

def toString(): String

Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.

returns

a String representation of the object.

Definition Classes
AnyRef → Any

final def unapplySeq[A](x: LazyList[A]): UnapplySeqWrapper[A]

Definition Classes
SeqFactory

def unfold[A, S](init: S)(f: (S) => Option[(A, S)]): LazyList[A]

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

A

Type of the elements

S

Type of the internal state

init

State initial value

f

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

returns

a lazy list that produces elements using f until f returns None

Definition Classes
LazyListIterableFactory

final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.InterruptedException])

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

Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.InterruptedException])

final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws(classOf[java.lang.InterruptedException]) @native()

object #::

object cons

© 2002-2019 EPFL, with contributions from Lightbend.
Licensed under the Apache License, Version 2.0.
https://www.scala-lang.org/api/2.13.0/scala/collection/immutable/LazyList$.html