binding ruby

http://www.ruby-doc.org/core/classes/Kernel.html#M001057
http://www.ruby-doc.org/core/classes/Binding.html
http://onestepback.org/index.cgi/Tech/Ruby/RubyBindings.rdoc/style/print


  def getBinding(str)
    return binding
  end
  str = "hello"
  eval "str + ' Fred'"                      #=> "hello Fred"
  eval "str + ' Fred'", getBinding("bye")   #=> "bye Fred"

class Demo
def initialize(n)
  @secret = n
end
def getBinding
  return binding()
end
end

k1 = Demo.new(99)
b1 = k1.getBinding
k2 = Demo.new(-3)
b2 = k2.getBinding

p eval("@secret", b1)   #=> 99
p eval("@secret", b2)   #=> -3
p eval("@secret")       #=> nil

def getBinding(param)
 return binding()
end
b = getBinding("hello")
p eval("param", b)   #=> "hello"