Re: [Rails-devel] Train management

[Chris S. <chr...@gm...>]

Note that, in 18EA there are triple train types - trains can be either
freight or express or local.

--
Chris

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On Mon, Jun 13, 2011 at 8:59 AM, Erik Vos <eri...@xs...> wrote:

> > -----Oorspronkelijk bericht-----
> > Van: Stefan Frey [mailto:ste...@we...]
>
> > If you have flipTrain subclassing Train or have both be implementations
> of
> > the interface trainI is up to you. However I prefer the latter and trainI
> is an
> > unnecessary, as imho there is no need for an interface with only one
> > implementation (unless you provide an official API).
>
> We have many redundant interfaces, and I'd rather get rid of all of them,
> but there seems to be (or have been) a school of thought with some
> influence
> in this project that maintains that such interfaces are required about
> everywhere, just in case.  I prefer to use interfaces only when there is a
> actual need to provide some common functionality to classes in completely
> different hierarchies (good examples we have are the CashHolder, Moveable
> and MoveableHolder interfaces).
>
> We'll find out whether or not we really need TrainI when developing the
> dual
> train class; I will consider both options. This could the only other train
> class we will ever need: even the 18EU Pullmann has (right or wrong) been
> implemented with the standard Train class; its peculiarities are handled by
> special code.
>
> Erik.
>
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