[Newbies] Traits Example

[Oscar Nierstrasz]

Hi Rob,

What you say seems to make sense, but it is hard to tell without  
looking at some code.

There are some simple examples of traits in Chapter 5 of Squeak by  
Example.

http://SqueakByExample.org/SBE.pdf

- on

On Mar 17, 2008, at 2:37, Rob Rothwell wrote:

> Hello,
>
> Can anyone give me a simple Traits example?  I am trying to figure  
> out if it would be useful for me in the context of developing Aida  
> applications.
>
> In Aida, a WebApplication observes a domain model object.  Let's  
> call it WebAppModel.
>
> Of course, you could subclass ANY object to create your WebAppModel,  
> but I still want it to know how to do certain things, like start and  
> stop itself.
>
> In other words, I might have one WebAppModel that subclasses Object,  
> and another that subclasses OrderedCollection, but I don't want to  
> teach them both how to start or stop each time I create a new one,  
> and it seems less elegant to subclass everything from a WebAppModel  
> base class and then include the actual objects they model as  
> instance variables.
>
> Does this make sense or am I missing some other fundamental concept,  
> and is this what Traits are for?
>
> Thanks,
>
> Rob Rothwell
> _______________________________________________
> Beginners mailing list
> Beginners at lists.squeakfoundation.org
> http://lists.squeakfoundation.org/mailman/listinfo/beginners