Design Patterns discussion

[jdeena AT comcast.net]

I like your differentiation between State and Strategy.

I do also have a confusion that I tend to think Builder and TemplateMethod patterns mean the same though they fall in creational and behavioral pattern respectively.

Both encapsulate a process of doing/creating.

Deena 

 

> -------------- Original message -------------- 
>
> > >I'm wondering if you can give me some additional details as to how these 
> > >are different? Their applicability, purpose and structure seem nearly 
> > >identical: make the behavior of the context class change dynamically as 
> > >the state/strategy changes. Both patterns even mentions how they can be 
> > >tied into the flyweight pattern. The only difference I can readily see 
> > >is that the state pattern mentions transitions while the strategy does 
> > >not. Am I missing something? 
> > > 
> > > 
> > > 
> > >Thank you for your time, 
> > > 
> > >-James 
> > 
> > I'm not sure, as I haven't used Strategy pattern with the exception of 
> > academic purposes. Anyways, the difference I see between them is that the 
> > State !
>  pattern acts as a finite state machine, so the transitions between 
> > them are inside of them, hiding that responsibility away from the client, 
> > while the Strategy pattern requires the client to transition between 
> > strategies. 
> > 
> > 
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