typelevel
Proposal: `andThen` for Polynomial?
Current Spire has compose for Polynomial[A]:
(f.compose(g).compose(h))(x) // => process h, then g, then f; that's result
But it has no andThen method for Polynomial.
In business context, People prefer more intuitive syntax ---- "Discount, then apply another discount, then add tax".
So implementing andThen alike function is reasonable choice for devs including newcomers.
Please tell me your opinions!
Thanks for the idea! The compose method for Polynomial relates to this mathematical concept.
https://en.wikipedia.org/wiki/Polynomial#Composition
What is the mathematical formulation for andThen?
It is just the opposite (and the standard semantics in Scala: https://www.scala-lang.org/api/current/scala/PartialFunction.html#andThen-f71).
basicaly (f.compose(g).compose(h))(x) is (h.andThen(g).andThen(f))(x). Such "pipeline" composition is often used in functional programming (Haskell, ocaml, etc). It is easier to read.
