Cats kernel/cats.kernel.instances/LongGroup

LongGroup

class LongGroup extends CommutativeGroup[Long]
trait CommutativeGroup[Long]
trait CommutativeMonoid[Long]
trait Group[Long]
trait Monoid[Long]
trait Semigroup[Long]
trait Serializable
class Object
trait Matchable
class Any

Value members

Concrete methods

def combine(x: Long, y: Long): Long
def empty: Long
def inverse(x: Long): Long
override def remove(x: Long, y: Long): Long
Definition Classes

Inherited methods

def combineAll(as: IterableOnce[Long]): Long

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 def combineAllOption(as: IterableOnce[Long]): Option[Long]
Definition Classes
Inherited from
Monoid
override def combineN(a: Long, n: Int): Long

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
Inherited from
Group
override def intercalate(middle: Long): CommutativeSemigroup[Long]
Definition Classes
Inherited from
CommutativeSemigroup
def isEmpty(a: Long)(ev: Eq[Long]): Boolean

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
override def reverse: CommutativeMonoid[Long]