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Alex Rivera
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If I create a Set in Scala using Set(1, 2, 3) I get an immutable.Set . scala> val s = Set(1, 2, 3) s: scala.collection.immutable.Set[Int] = Set(1, 2, 3) Q1: What kind of Set is this actually? Is it some hash-set? What is the complexity of look-ups for instance? Q2: Where can I read up on this "set-creating" method? I thought that it was the apply method but the docs says " This method allows sets to be interpreted as predicates. It returns true, iff this set contains element elem. " Similarly, if I create a List using List(1, 2, 3) , I get scala> val l = List(1, 2, 3) l: List[Int] = List(1, 2, 3) scala> l.getClass res13: java.lang.Class[_] = class scala.$colon$colon Q3: Again, what do I get? In this case I can't even immediately tell if it's mutable or not, since it's not even part of the scala.collection -package. Why does this live in the scala package? Q4: Where in the API can I read about this "list-creating" method?
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