Cats kernel/cats.kernel.instances/IntGroup

IntGroup

class IntGroup extends CommutativeGroup[Int]
trait CommutativeGroup[Int]
trait Group[Int]
trait Monoid[Int]
trait Semigroup[Int]
trait Serializable
class Object
trait Matchable
class Any

Value members

Concrete methods

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

Inherited methods

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

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

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: Int): CommutativeSemigroup[Int]
Definition Classes
Inherited from
CommutativeSemigroup
def isEmpty(a: Int)(ev: Eq[Int]): 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[Int]