sadache · December 12, 2011 09:27 · gre · Dec 12, 2011 · sadache · Dec 12, 2011
diff --git a/code.scala b/code.scala
 // What is a Promise sequence function ?
 // A function which transform a List[Promise[A]] into a Promise[List[A]]

 // First naive implementation. It's a synchronous implementation (blocking).
 def sequencePromises[A](list: List[Promise[A]]): Promise[List[A]] =
  list.foldLeft(Promise.pure(Promise[List[A]]()))((s,p) => s.flatMap( s => p.map(a => s :+ a)))  

 //should be in the lines of this, didn't try to typecheck it though.
	// What is a Promise sequence function ?
	// A function which transform a List[Promise[A]] into a Promise[List[A]]

	// First naive implementation. It's a synchronous implementation (blocking).
	def sequencePromises[A](list: List[Promise[A]]): Promise[List[A]] =
	list.foldLeft(Promise.pure(Promise[List[A]]()))((s,p) => s.flatMap( s => p.map(a => s :+ a)))

	//should be in the lines of this, didn't try to typecheck it though.