More D newb questions.

[Bruce Adams]

On Thu, 08 May 2008 23:53:13 +0100, Me Here <p9e883002 at sneakemail.com>  
wrote:
>
> One person waiting at a checkout is just one person. Another joins,  
> you've got
> a queue. If the till next door closes and its queue joins the back of  
> that two
> person queue and you get a longer queue. Not a queue of queues.
>
A queue with one person in it is still a queue. i.e. a container
Likewise an empty queue.

> Two playing cards on top of each other and you have the start of a pack.  
> Put to
> packs together and you have a bigger pack.
>
> No one is surprised by any of these. There is nothing inconsistant.
>
> b.

Likewise. A card is a card.
A set of cards may be empty or contain one or more cards.