нас всех скоро сосчитают

reputations online

покачало

Кто-нибудь заметил ещё? Плавная такая волна прошла, и ещё, и ещё.

Нанотехнологии в Кремнево-Осколково

"hidden monads in scala"

blogger entry

  trait Functor[X] { 
    def map[Y](f: X => Y): Functor[Y]
  }
  
  def loop[X,Y](f: Functor[X], a: X=>Y) = for (x <- f) yield a(x)

Update: see recent blog entry on monads by Luc Duponchel for a lot more details.

Update: did you get it? for() can be applied to any class that has map(); and, roughly speaking, if you have several variables in your for loop, you will need flatMap (to flatten the result, aka, apply monadic multiplication.