How to define a list of lists in Scala?

Question

I would like to create a storage for the following type:

List(List(2.3,1.1),List(2.2, 1))

But if I do the following:

var y         


        

Answer 1

This seems to have been fixed in Scala 2.9

Welcome to Scala version 2.9.0.1 (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_22).
Type in expressions to have them evaluated.
Type :help for more information.

scala> var y = List(List (1.0, 2.2), List(2, 1.1, -2.1))
y: List[List[Double]] = List(List(1.0, 2.2), List(2.0, 1.1, -2.1))

scala> y(0)(0) * 2
res0: Double = 2.0