Demo fragments for my talk “What can we learn from composable DSLs?”

AkkaHttp.scala

object Utils {
  val disableCache = respondWithHeaders(
    `Cache-Control`(`no-cache`, `max-age`(0), `must-revalidate`, `no-store`),
    `Expires`(DateTime.MinValue)
  )
}

object BooksRoutes {
  val routes = path("books" / Segment) { id =>
    complete(id)
  }
}

object AuthorRoutes {
  val routes = path("authors" / "list") {
    complete("Shakespear")
  }
}

object Routes {
  val routes = Utils.disableCache {
    pathPrefix("v1" / "api") {
      BookRoutes.routes ~ AuthorRoutes.routes
    }
  }
}

Macroid.scala

val large = TextTweaks.large + TextTweaks.italic
val adaptive = hdpi ? large | Tweaks.blank

val hello = widget[TextView] <~ text("Hello World!") <~ adaptive
val button = widget[Button] <~ text("Click me!")

layout[LinearLayout](
  hello,
  button
)

ScalaJS.scala

def nursery(teaser: String) = li(
  em(teaser), " ", button("Show")
)

val lamb = nursery("Mary had a little lamb")
val star = nursery("Twinkle, twinkle, little star")

val rhymes = ul(lamb, star)

println(rhymes)