Semigroup_DiscretePath
The default semigroup instance that concats paths by rebasing.
Notice that this structure
- is associative
- is only unital if you identify
x concatRebase zerowithx, where the former has an extra point. - does not admit inverses. Concatenating a reverse path does not erase the original path.
Value members
Inherited methods
Given a sequence of as, combine them and return the total.
Given a sequence of as, combine them and return the total.
If the sequence is empty, returns None. Otherwise, returns Some(total).
Example:
scala> import cats.kernel.instances.string._
scala> Semigroup[String].combineAllOption(List("One ", "Two ", "Three"))
res0: Option[String] = Some(One Two Three)
scala> Semigroup[String].combineAllOption(List.empty)
res1: Option[String] = None
- Inherited from
- Semigroup
Return a combined with itself n times.
Return a combined with itself n times.
Example:
scala> import cats.kernel.instances.int._
scala> import cats.kernel.instances.string._
scala> Semigroup[Int].combineN(1, 10)
res0: Int = 10
scala> Semigroup[String].combineN("ha", 3)
res1: String = hahaha
- Inherited from
- Semigroup
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