There is a trait called Kleisli in the scalaz library. Looking at the code:
import scalaz._
import Scalaz._
type StringPair = (String, String)
val f: Int => List[String] = (i: Int) => List((i |+| 1).toString, (i |+| 2).toString)
val g: String => List[StringPair] = (s: String) => List("X" -> s, s -> "Y")
val k = kleisli(f) >=> kleisli(g) //this gives me a function: Int => List[(String, String)]
Calling the function k with the value of 2 gives:
println( k(2) ) //Prints: List((X,3), (3,Y), (X,4), (4,Y))
My question is: how would I use Scalaz to combine f and g to get a function m such that the output of m(2) would be:
val m = //??? some combination of f and g
println( m(2) ) //Prints: List((X,3), (X,4), (3,Y), (4,Y))
Is this even possible?
