From: Rick DeNatale <rick.denatale@...>
Date: 2007-10-26T20:58:01+09:00
Subject: Re: find all member in a class

On 10/26/07, Pokkai Dokkai <bad_good_lion@yahoo.com> wrote:
> how to find all members list(member functions & member variables for all
> access specifiers like public, private and protected) ?
> --
> Posted via http://www.ruby-forum.com/.
>
>

Note that unlike some languages with which you might be familiar,
"member" variables aren't declared and only come into being when
defined during code execution.  In fact there's a real difference
between that subtle vocabulary shift between "member" and "instance".
Different instances of the same class might have different sets of
instance variables. In fact the same instance might acquire instance
variables over time:

class A
  def i
    @i ||= 42
  end

  def j
    @j ||= "hello"
  end
end

a1 = A.new

a1.instance_variables # => []

a1.i

a1.instance_variables # => ["@i"]

a1.j

a1.instance_variables # => ["@j", "@i"]

AND, since Ruby allows instances to have singleton methods, it's even
possible for two instances of the same class to have different sets of
methods.

-- 
Rick DeNatale

My blog on Ruby
http://talklikeaduck.denhaven2.com/