Practicing Ruby - The Decorator Delegator Disco

Ruby Best Practices - The Decorator Delegator Disco:

2009-06-27 16:00, written by Gregory Brown As promised, we’re back with more design discussion and hopefully some interesting ideas. Let’s start with a quick recap of what has happened so far. First, Sandi Metz posted on her blog about type specific coupling that a case statement can introduce. Her proposed solution encouraged us to pass the responsibilities down to the individual objects, which is certainly desirable. Aaron Patterson got in the mix, pointing out the issues that can happen when you are too aggressive about adding methods to core Ruby. When Sandi suggested that Double Dispatch might be a way around this problem, Aaron responded with an implementation using the visitor pattern to accomplish this sort of thing. I had not seen Aaron’s initial work before setting out to solve the problem on my own, and ended up taking an entirely different path to get there. I’...

Full article: http://blog.rubybestpractices.com/posts/gregory/008-decor...