From: "trans.  (T. Onoma)" <transami@...>
Date: 2004-11-06T01:24:18+09:00
Subject: Re: value provided for argument with default value - how to check inside method?

On Friday 05 November 2004 10:08 am, itsme213 wrote:
| "Robert Klemme" <bob.news@gmx.net> wrote
|
| > I'm unsure what you're at.  Normally the idea of having a default value
| > is that you don't have to worry about where it came from:
| >
| > def foo(x=10)
| >   puts x
| > end
| >
| > Care to unveil a bit more detail why you would need that piece of
| > information?
|
| In this case, I want to use foo() and foo(x) as getter and setter
| respectively i.e. some form of overloading.

Something like:

  def foo(*x)
    if x.empty?
      defined?(@x) ? @x : @x=10
    else
      @x = x.pop
    end
  end

Should do the trick.

T.