longliveenduro

button.setOnClickListener(new View.OnClickListener {
  def onClick(v:View) {
    openUri("http://wikipedia.org")
  }
})

longliveenduro

def fetchUserData(userId: Int): Future[UserData] = {...} // method which returns user data in the future
def loadFromUrl(url: Url): Future[Bitmap] = {...} // method which returns a bitmap in the future
 
val avatar: Future[Bitmap] = 
  for {
    userData <- fetchUserData(1) // bind user data to value 'userData' as soon as it is available 
    avatar <- loadFromUrl(userData.avatarUrl) // use 'userData' from above (when it is available) and then 
                                             // load the bitmap and bind it to 'avatar' as soon as it is available
  } yield avatar // return the avatar bitmap as a result
  

longliveenduro

{"questions":[{"id":37278957,"title":"Einfach nur müde","body":"Ich bin seit einigen Wochen einfach nur müde, müde, müde. \r\nGehe abends um 9 ins Bett, schlafe sofort ein und schlafe bis morgens um 7 durch. \r\nMorgens fühle ich mich als hätte ich kaum geschlafen. Auch im Urlaub oder an den Wochenenden bin ich dauer müde, egal wie lange ich schlafe.\r\nBeim Arzt war ich schon, der konnte nichts feststellen, Blutwerte alle super und ich bin kerngesund.\r\nHabe einige Probleme auf der Arbeit, bin ziemlich unterfordert mit mit meinen Aufgaben und langweile mich oft. Versuche seit 2 Jahren einen neuen Job zu finden, doch es ist gar nicht so einfach.\r\nHabt ihr einen Tipp wie sich meine Müdigkeit etwas bessern könnte?\r\n","created_at":"2014-07-18T08:54:42+02:00","creator":{"id":5462512,"nickname":"Polly276"},"tags":[{"id":3460,"name":"schlafen","normalized_tag":"schlafen","question_frequency":27065},{"id":4932,"name":"müde","normalized_tag":"muede","question_frequency":4264},{"id":5206433,"name":"Unterfoderung"

longliveenduro

{"questions":[
  {"id":36983645,"title":"question title...","body":"...","created_at":"...", "creator":{"id":5626472,"nickname":"..."},
  "tags":[{"id":1143,"name":"Sommer"}],
  "count_of_answers":0, "has_most_helpful_answer":false, 
  "links":[
    {"rel":"answers","href":"/answers?questionId=36983645"},
    {"rel":"creator","href":"/users/5626472"}]}, 
  ...
 ],
  "total_count": 276,

longliveenduro

{
   "questions" : [ { "id":4711, "title" : "Why to follow REST principles?", .... }, ...]
   "links" : [
      { "rel" :  "previous", "href" :  "/questions?beforeId=4711&limit=20" },
      { "rel" :  "next", "href" :  "/questions?afterId=4731&limit=20" },
   ]
} 

longliveenduro

  case object ParseError
  case class Person(firstName: String, lastName: String)

  val success1 = "first".success[ParseError.type].toValidationNel
  val failure = ParseError.failure[String].toValidationNel

  val result = (success1 |@| failure) {  Person(_ , _) }
  println(result)
  // prints : Failure(NonEmptyList(ParseError))

longliveenduro

import scalaz._
import Scalaz._

object validationFailFast {

  case object ParseError

  case class Person(firstName: String, lastName: String)

  val success1 = "first".success[ParseError.type].toValidationNel

longliveenduro

  val success1 = 1.success[String]
  val failure1 = "failure1".failure[Int]
  val failure2 = "failure2".failure[Int]
  // use +++ on Validation

  val result = success1 +++
    failure1 +++
    failure2
  // result is Failure(failure1failure2)

longliveenduro

  val success1 = 1.success[String]
  val failure1 = "failure1".failure[Int]
  val failure2 = "failure2".failure[Int]
  // use +++ on Validation

  val result = success1.toValidationNel +++
    failure1.toValidationNel +++
    failure2.toValidationNel

  // result is Failure(NonEmptyList(failure1, failure2))

longliveenduro

  val success1 = 1.success[String]
  val failure1 = "failure1".failure[Int]
  val failure2 = "failure2".failure[Int]

  for {
    r1 <- success1
    r2 <- failure1
    r3 <- failure2
  } yield r1 + r2 + r3