Scala 3/scala.collection/EvidenceIterableFactory

EvidenceIterableFactory

trait EvidenceIterableFactory[+CC[_], Ev[_]] extends Serializable

Base trait for companion objects of collections that require an implicit evidence.

Type parameters:
CC

Collection type constructor (e.g. ArraySeq)

Ev

Unary type constructor for the implicit evidence required for an element type (typically Ordering or ClassTag)

Companion:
object
Source:
Factory.scala
class Object
trait Matchable
class Any
class Delegate[CC]
class Delegate[CC]
object ArraySeq
object ArraySeq
class Delegate[CC, Ev]
class Delegate[CC]
object SortedSet
object SortedSet
object SortedSet
object TreeSet
object TreeSet

Value members

Abstract methods

def empty[A : Ev]: CC[A]
def from[E : Ev](it: IterableOnce[E]): CC[E]
def newBuilder[A : Ev]: Builder[A, CC[A]]

Concrete methods

def apply[A : Ev](xs: A*): CC[A]
def fill[A : Ev](n: Int)(elem: => A): CC[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.

Returns:

A collection that contains the results of n evaluations of elem.

Source:
Factory.scala
def iterate[A : Ev](start: A, len: Int)(f: A => A): CC[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

Returns:

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

Source:
Factory.scala
def tabulate[A : Ev](n: Int)(f: Int => A): CC[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

Returns:

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

Source:
Factory.scala
def unfold[A : Ev, S](init: S)(f: S => Option[(A, S)]): CC[A]

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

Produces a collection 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

Returns:

a collection that produces elements using f until f returns None

Source:
Factory.scala

Implicits

Implicits

implicit def evidenceIterableFactory[A : Ev]: Factory[A, CC[A]]