hiya,
def declares a method, each subsequent access makes the expression run
again. In this line:
a.value = "new value"
you get a new Data, set its value and discard it. The only "trick" is
that, as in this case, you can define one without parameters, but it
will always re-evaluate.
I hope the rest makes sense given that.
cheers,
Chris
On Wed, Jul 8, 2009 at 1:35 PM, Christoph Drießen<
ced@...> wrote:
> Hi all,
>
> running the following code yields
>
> null
> null
> null
> new value
>
> class Data {
> var value: String = _
> }
>
> object DataTest {
> def main(args: Array[String]) {
> def a = new Data
> val b = new Data
>
> println(a.value)
> println(b.value)
>
> a.value = "new value"
> b.value = "new value"
>
> println(a.value)
> println(b.value)
> }
> }
>
> Can anyone explain the difference between def and val in this situation?
> Playing around with both I cannot find any difference between 'a' and 'b',
> they are both the same class. But 'a' must be something different. What
> exactly is it then?
>
> Cheers,
> Christoph
>
