Functors, covariant by nature if not by Scala type. Their key
operation is map
, whose behavior is constrained only by type and
the functor laws.
Many useful functors also have natural scalaz.Apply or scalaz.Bind operations. Many also support scalaz.Traverse.
- See also
- Companion
- object
Type members
Classlikes
Inherited classlikes
Value members
Concrete methods
The composition of Functor F
and Bifunctor G
, [x, y]F[G[x, y]]
, is a Bifunctor
The composition of Functor F
and Bifunctor G
, [x, y]F[G[x, y]]
, is a Bifunctor
The composition of Functors F
and G
, [x]F[G[x]]
, is a Functor
The composition of Functors F
and G
, [x]F[G[x]]
, is a Functor
Pair all A
s in fa
with the result of function application.
Pair all A
s in fa
with the result of function application.
The composition of Functor F and Contravariant G, [x]F[G[x]]
,
is contravariant.
The composition of Functor F and Contravariant G, [x]F[G[x]]
,
is contravariant.
The product of Functors F
and G
, [x](F[x], G[x]])
, is a Functor
The product of Functors F
and G
, [x](F[x], G[x]])
, is a Functor
Empty fa
of meaningful pure values, preserving its
structure.
Empty fa
of meaningful pure values, preserving its
structure.
Inherited methods
Converts ma
to a value of type F[B]
using the provided bijection.
Converts ma
to a value of type F[B]
using the provided bijection.
- Inherited from
- InvariantFunctor
Converts ma
to a value of type F[B]
using the provided isomorphism.
Converts ma
to a value of type F[B]
using the provided isomorphism.
- Inherited from
- InvariantFunctor