LukaJCB

type Container f1 f2 f3 = 
  { children :: f1 String
  , friends :: f2 Int
  , colleagues :: f3 Number
  }

data SomeType f1 f2 f3 a e = Container (Container f1 f2 f3)
  | AnotherType a
  | SomeEffect (Eff e Unit)

LukaJCB

import Html exposing (beginnerProgram, div, button, text, ul, li, input, Html)
import Html.Events exposing (onClick, onInput)
import Array exposing (Array, toList, fromList, push, filter)


main =
  beginnerProgram { model = initialState, view = view, update = update }


type alias Model = { list: Array String, currentText: String }

LukaJCB

val nameStream = createInputHandler()

val component = div(
  label(className := "label", "Name:"),
  input(inputType := "text", input --> nameStream),
  hr(),
  h1("Hello ", child <-- nameStream)
)

render(document.getElementById("app"), component)

LukaJCB

//So now after letting IntelliJ convert our file to Kotlin we get this:
//... but there's an error

class ExampleActivity : AppCompatActivity() {

    private var foo: String? = "Bar"

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

LukaJCB

class ExampleActivity extends AppCompatActivity {

    private String foo = "Bar";

    @Override
    public void onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        foo = getSomething();

LukaJCB

trait Functor[F[_]] {
  def fmap[A, B](f: A => B): F[A] => F[B]
}

LukaJCB

val res = arr match {
  case Array(0) => "0"
  case Array(x, y) => x + " > " + y
  case Array(0, _*) => "0 > ..."
  case _ => "..."
}

LukaJCB

val list = Stream(1,2,3,4,5,6,7,8,9)

val list2 = list.map(_ + 8)
  .filter(_ % 2 == 0)
  .map(_ * 4)
  
println(list2.head)

LukaJCB

var arr = [1,2,3,4,5,6,7,8,9]

var arr2 = arr.map(x => x + 8)
  .filter(x => x % 2 == 0)
  .map(x => x * 4)
  
console.log(arr2[0])

LukaJCB

add :: Integer -> Integer -> Integer
add a b = a + b