Task and Coeval need foreach and foreachL

[alexandru]

Task and Coeval need foreach and foreachL methods.

The foreachL operator behaves like map, except that it yields a Task[Unit] and a Coeval[Unit]. And foreach will trigger the evaluation. In case of Task it has to take a Scheduler as an implicit parameter and return a CancelableFuture[Unit], since it cannot be blocking.

Task example:

val task = Task(1 + 1)

// Lazy foreachL
val unit: Task[Unit] = task.foreachL(x => println(x))

// Strict foreach
for (r <- task) println(r)

Coeval example:

val coeval = Coeval(1 + 1)

// Lazy foreachL
val unit: Coeval[Unit] = coeval.foreachL(x => println(x))

// Strict foreach
for (r <- coeval) println(r)