BuildFrom

@implicitNotFound(msg = "Cannot construct a collection of type ${C} with elements of type ${A} based on a collection of type ${From}.")
trait BuildFrom[-From, -A, +C]

Builds a collection of type C from elements of type A when a source collection of type From is available. Implicit instances of BuildFrom are available for all collection types.

Type Params
A

Type of elements (e.g. Int, Boolean, etc.)

C

Type of collection (e.g. List[Int], TreeMap[Int, String], etc.)

From

Type of source collection

Companion
object
Source
BuildFrom.scala
class Any

Value members

Abstract methods

def newBuilder(from: From): Builder[A, C]

Get a Builder for the collection.

Get a Builder for the collection. For non-strict collection types this will use an intermediate buffer. Building collections with fromSpecific is preferred because it can be lazy for lazy collections.

Source
BuildFrom.scala

Concrete methods

def toFactory(from: From): Factory[A, C]

Partially apply a BuildFrom to a Factory

Partially apply a BuildFrom to a Factory

Source
BuildFrom.scala

Deprecated methods

@deprecated("Use newBuilder() instead of apply()", "2.13.0") @inline
def apply(from: From): Builder[A, C]
Deprecated
Source
BuildFrom.scala