UnitAbGroup
trait CommutativeGroup[Unit]
trait CommutativeMonoid[Unit]
trait CommutativeSemigroup[Unit]
trait Group[Unit]
trait Monoid[Unit]
trait Semigroup[Unit]
trait Serializable
class Object
trait Matchable
class Any
class UnitAlgebra
Value members
Concrete methods
Inherited methods
Given a sequence of as, sum them using the monoid and return the total.
Given a sequence of as, sum them using the monoid and return the total.
Example:
scala> import cats.kernel.instances.string._
scala> Monoid[String].combineAll(List("One ", "Two ", "Three"))
res0: String = One Two Three
scala> Monoid[String].combineAll(List.empty)
res1: String = ""
- Inherited from
- Monoid
override
Return a appended to itself n times. If n is negative, then
this returns inverse(a) appended to itself n times.
Return a appended to itself n times. If n is negative, then
this returns inverse(a) appended to itself n times.
- Definition Classes
- Group -> Monoid -> Semigroup
- Inherited from
- Group
Tests if a is the identity.
Tests if a is the identity.
Example:
scala> import cats.kernel.instances.string._
scala> Monoid[String].isEmpty("")
res0: Boolean = true
scala> Monoid[String].isEmpty("something")
res1: Boolean = false
- Inherited from
- Monoid
Remove the element b from a.
Remove the element b from a.
Equivalent to combine(a, inverse(b))
Example:
scala> import cats.kernel.instances.int._
scala> Group[Int].remove(5, 2)
res0: Int = 3
- Inherited from
- Group