From: Martin DeMello <martindemello@...>
Date: 2002-04-20T05:09:48+09:00
Subject: Re: Replacing groups of methods: How would *you* do this?

Hal E. Fulton <hal9000@hypermetrics.com> wrote:

> Suppose I have a class where I consider
> a number of methods "pluggable" or
> "disposable." (If you're curious, these are
> UI-oriented; I'm writing an app with alternate
> user interfaces.)

> At first I thought: I'll make a module with the
> methods in it, then include it at runtime if/when
> I choose to.

> But then I realized that module instance methods
> don't replace class instance methods. Hmm.

> So I thought: I can write replacement methods
> in the same class and put them in separate
> files which I then include.

> But I don't really want to use separate files.

> What do you think?

How about using alias to swap in and out sets of methods, rather than
actually replacing them? Something like

  def swapin(i)
    ["method1","method2"].each {|m|
      eval "alias #{m} #{methodset[i][m]}"
    }
  end

-- 
Martin DeMello