Samehadar

Advanced Functional Programming with Scala - Notes

Copyright © 2017 Fantasyland Institute of Learning. All rights reserved.

1. Mastering Functions

A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.

val square : Int => Int = x => x * x

gigiigig

import shapeless._

import scalaz._
import Scalaz._

object console extends App {

  trait Foo[A] {
    type B
    def value: B

Fristi

{-# LANGUAGE TypeFamilies #-}

import Data.Function (on)
import Control.Applicative

data EventData e = EventData {
    eventId :: Int,
    body :: Event e
}