From: "Bartosz Dziewoński" <matma.rex@...>
Date: 2012-04-28T21:45:40+09:00
Subject: Re: list local_variables in a def by means of a method

Like this:

--------
class A
  def stuff
    a = 4
    foo = 'asd'
    list_vars(binding())
  end

  def list_vars bnd
    bnd.eval('local_variables').each{|var|
      puts "#{var} is #{bnd.eval(var.to_s).class} and is equal to
#{bnd.eval(var.to_s).inspect}"
    }
  end
end

A.new.stuff
--------

This will print:

a is Fixnum and is equal to 4
foo is String and is equal to "asd"


The method "binding" will return a magical value that basically
contains the entire state of a script in this particular place. You
can then eval code as if it appeared in that place, and you will have
access to all variables available there.




-- Matma Rex