MapGroup
@SerialVersionUID(0L)
trait Group[Map[K, V]]
trait Monoid[Map[K, V]]
trait Semigroup[Map[K, V]]
trait Serializable
class Object
trait Matchable
class Any
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
Between each pair of elements insert middle This name matches the term used in Foldable and Reducible and a similar Haskell function.
Between each pair of elements insert middle This name matches the term used in Foldable and Reducible and a similar Haskell function.
- Inherited from
- Semigroup
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