Thanks, all your suggestions work great!
One more trivial question :
I found that my attempt to use "<:" to define a member variable doesn't
work. For example,
val pixel_stat<:Array[Int];
....
def this()
{
pixel_stat = new Array[Int](3);
}
would make X10 compiler to complain about time inferencing. Is this because
I can only use "<:" when definition and instantiation happens at the same
time?
Thanks,
Kirak
On Wed, Dec 8, 2010 at 12:51 PM, Vijay Saraswat <vi...@saraswat.org> wrote:
> You can always try
>
> val A<: Array[Int] = new Array[Int]((0..2)*(0..3), 0);
>
>
> This says, the "A is a val, and its type must satisfy Array[Int], and
> it is initialized with new Array..."..
>
> This permits the compiler to infer the type Array[Int](2) for A. (The
> compiler checks that this satisfies Array[Int].)
>
> Now, you can certainly declare A as a member variable of a class without
> specifying its type, e.g.:
>
> class F {
>
> val A = new Array[Int]((0..2)*(0..3), 0); // will infer type, e.g.
> Array[Int](2)
>
> ...
>
> }
>
> However, if you want to put A in a List[Array[Int]], say, then you have
> to declare
>
> val A:Array[Int] = ....
>
> In this case you can access A using a point, e.g.
>
> A([1,2])
>
> will work.
>
> On 12/8/2010 11:55 AM, Kirak Hong wrote:
> > Hi,
> >
> > I got an error when I run the following code :
> >
> > val A:Array[Int] = new Array[Int]((0..2)*(0..3), 0);
> >> A(1,1) = A(1,1)+1;
> >>
> >> error :
> >> Method or static constructor not found for given call.
> >> Call: A(x10.lang.Int{self==1}, x10.lang.Int{self==1})
> >>
> > However, following code form programming manual seems work well.
> >
> > val A = new Array[Int]((0..2)*(0..3), 0);
> >> A(1,1) = A(1,1)+1;
> >>
> > The only difference is that I specified type for A4 when define, and I
> need
> > to do that since I want to put the A as member variable of a class.
> > Can anybody please help me?
> >
> > Thanks,
> > Kirak
> >
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