From: Gavin Sinclair <gsinclair@...>
Date: 2003-01-14T09:39:53+09:00
Subject: Re: Array_Of(AClass)

On Tuesday, January 14, 2003, 9:59:44 AM, dblack wrote:

> Technique #2 is not a drop-in replacement for technique #1, though.
> For example, if you want to "listen in" on what a method is doing,
> you might do:

>   class String
>     alias :oldsplit :split
>     def split(*a)
>       puts "args are #{a.join(', ')}"
>       oldsplit(*a)
>     end
>   end

> I don't think there's an equivalent way to do this by modifying the
> object's singleton class.

If it's just a single object, surely you can:

class << the_str
  def split(*args)
    puts "args are #{args.join(', ')}"
    super
  end
end

Which, again, is much nicer than aliasing.  However, it only works on
one String instance, not all of them.  Which was probably your point.

Gavin