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Trait EvidenceIterableFactory.EvidenceIterableFactory

Companion object • Source code

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)
Supertypes
trait Serializable
class Object
trait Matchable
class Any
Known subtypes
17 types
trait ClassTagIterableFactory[CC]
class Delegate[CC]
class Delegate[CC]
trait ClassTagSeqFactory[CC]
trait StrictOptimizedClassTagSeqFactory[CC]
object ArraySeq.type
object ArraySeq.type
object UnrolledBuffer.type
class Delegate[CC, Ev]
class Delegate[CC]
object SortedSet.type
object SortedSet.type
object SortedSet.type
trait SortedIterableFactory[CC]
object TreeSet.type
object PriorityQueue.type
object TreeSet.type

Abstract methods

Source
def empty[A : Ev]: CC[A]

Source
def from[E : Ev](it: IterableOnce[E]): CC[E]

Source
def newBuilder[A : Ev]: Builder[A, CC[A]]

Concrete methods

Source
def apply[A : Ev](xs: A*): CC[A]

Source
def fill[A : Ev](n: Int)(elem: => A): CC[A]

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
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.

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
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.

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
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.

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

Implicits

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

© 2002-2022 EPFL, with contributions from Lightbend.
Licensed under the Apache License, Version 2.0.
https://scala-lang.org/api/3.2.0/scala/collection/EvidenceIterableFactory.html