[Catalyst] Shoot out -- Catalyst / RoR / Other MVC apps --

[Peter Karman]

Dave Rolsky scribbled on 5/9/07 8:57 AM:
> On Wed, 9 May 2007, Peter Karman wrote:
> 
>> * subclass subclass subclass
> 

I meant that as in 'pound this into my own brain' rather than 'always do this'. 
As in, 'remember that if an existing module does 90% of what you want, it is 
probably better to subclass and extend/override than re-invent the whole wheel.'

unless of course it isn't. ;)

> My experience tells me that lots of subclassing is a bad smell. 
> Delegation is often simpler and less fraught with possibility for name 
> conflicts.

What do you mean by delegation?

> 
> Perl's inheritance mechanism is particularly egregious, of course. SUPER 
> is broken, and without private methods or attributes of any sort, it's 
> really easy to step on your parent's internals and break things.
> 
>> * a couple levels of indirection can increase re-usability immensely
> 
> "All problems in computer science can be solved by another level of 
> indirection" (Butler Lampson)
> 
> ... except the problem of having too many levels of indirection.
> 

exactly. which is why I said 'a couple.' ;) Everything in Moderation.

-- 
Peter Karman  .  http://peknet.com/  .  peter at peknet.com