Given a value and a function in the Apply context, applies the function to the value.
ap2 is a binary version of ap, defined in terms of ap.
ap2 is a binary version of ap, defined in terms of ap.
Replaces the A
value in F[A]
with the supplied value.
Replaces the A
value in F[A]
with the supplied value.
Two sequentially dependent Applicatives can be composed.
Two sequentially dependent Applicatives can be composed.
The composition of Applicatives F
and G
, F[G[x]]
, is also an Applicative
Applicative[Option].compose[List].pure(10) = Some(List(10))
Two sequentially dependent Applys can be composed.
Two sequentially dependent Applys can be composed.
The composition of Applys F
and G
, F[G[x]]
, is also an Apply.
val ap = Apply[Option].compose[List] val x = Some(List(1, 2)) val y = Some(List(10, 20)) ap.map2(x, y)(_ + _) == Some(List(11, 12, 21, 22))
Compose this functor F with a functor G to produce a composite Functor on G[F[_]], with a map method which uses an A => B to map a G[F[A]] to a G[F[B]].
Compose this functor F with a functor G to produce a composite Functor on G[F[_]], with a map method which uses an A => B to map a G[F[A]] to a G[F[B]].
Compose 2 invariant Functors F and G to get a new Invariant Functor for F[G[_]].
Compose 2 invariant Functors F and G to get a new Invariant Functor for F[G[_]].
Compose this functor F with a Contravariant Functor G to produce a new Contravariant Functor on F[G[_]].
Compose the Invariant Functor F with a normal (Covariant) Functor to get a new Invariant Functor for [F[G[_]].
Tuple the values in fa with the result of applying a function with the value
Tuple the values in fa with the result of applying a function with the value
Lift a function f to operate on Functors
Lift a function f to operate on Functors
Applies the pure (binary) function f to the effectful values fa and fb.
Applies the pure (binary) function f to the effectful values fa and fb.
map2 can be seen as a binary version of cats.Functor#map.
pure
lifts any value into the Applicative Functor.
pure
lifts any value into the Applicative Functor.
Applicative[Option].pure(10) = Some(10)
pureEval
lifts any value into the Applicative Functor.
pureEval
lifts any value into the Applicative Functor.
This variant supports optional laziness.
Given fa
and n
, apply fa
n
times to construct an F[List[A]]
value.
Given fa
and n
, apply fa
n
times to construct an F[List[A]]
value.
Empty the fa of the values, preserving the structure
Empty the fa of the values, preserving the structure