Another silly question, but I can't find any mention of it in the doc nor in the Fan sources: how do I create an empty map?

I tried

map := Map.make([Int:Int]) map := Map.make(Int:Int) map := Map.make(int, int) map := Map.make(Type.make(int, int))

and quite a few other combinations, but no luck.

The API doc says that the parameter of Map.make is Type but this didn't help...

-- Cedric

Ok, figured it out ten seconds after I posted this:

map := [Int:Int][:]

I'm still curious to hear why my various make() attempts failed...

Try

map := Map.make([Int:Int].type)

I think this parameter is like the array instance passed into List#toArray in Java. Is that correct?

You don't need the first set of square brackets:

map := Int:Int[:]

Maps and Lists should rarely ever be created using the make() methods, unless you're doing so reflectively. But if you need to use Map.make (as helium noted) you need to pass in a Map Type.