So how would you do it in scala ;) ?
(sorry I always find it crushing how easy everything is in scala, when
I have to look at java).
Of course you can just do:
def foo() : (String, Int) = ("Hello", 42)
never looking into what scala *actually* does with tuples, if its
something nasty or not... (someone else I am sure knows if it is a
good or bad thing).
On Feb 10, 7:05 am, Viktor Klang <[email protected]> wrote:
> I'd recommend putting a static factory method named "pair" aswell,
>
> with a bit of static import magicks:
>
> final Pair<String,String> values = pair("foo","bar");
>
> instead of
>
> final Pair<String,String> values = Pair.of("foo","bar");
>
> because
>
> final Pair<String,String> values = of("foo","bar"); //doesn't really make
> sense...
>
> On Mon, Feb 9, 2009 at 8:30 PM, Reinier Zwitserloot <[email protected]>wrote:
>
>
>
>
>
> > .of instead of .create?
>
> > I likey.
>
> > On Feb 9, 6:26 pm, [email protected] (Dominic Mitchell) wrote:
> > > On Mon, Feb 09, 2009 at 05:27:42AM -0800, Reinier Zwitserloot wrote:
> > > > 1. By using a constructor, you don't get type inference. Use a static
> > > > method, like so:
>
> > > > public static <P, Q> Pair<P, Q> create(P a, P b) {
> > > > return new Pair<P, Q>(a, b);
> > > > }
>
> > > > and then make the actual constructor private.
>
> > > Hear, hear! Although, I'd call it "of" rather than create, as that's
> > > what the google collections library does. The type inference leads to a
> > > really nice API.
>
> > > public Pair<String, Integer> doStuff() {
> > > // …
> > > return Pair.of("answer", 42);
> > > }
>
> > > As to the issues of getters / setters:
>
> > > * Don't have setters, pairs should be immutable.
> > > * Do you really need to get at pairs from within JavaBeans? I'd guess
> > > probably not. Most of the time, the components of a pair will be
> > > extracted within a line or two of the call site.
>
> > > A nice discussion, anyways. I wish my iPod hadn't run out of juice half
> > > way through. :)
>
> > > -Dom
>
> --
> Viktor Klang
> Senior Systems Analyst
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