Hmm, I'm probably being obtuse here, but how do I get a reference to "this
code block" within a code block? I can write:

  a = lambda { |x| x < 2 ? 1 : x * a.call(x-1) }
  # trouble is, the block is bound to external variable 'a'

  b = a
  a = nil
  puts b.call(5)  # fails

I want the object to be self-contained. 'self' doesn't work. Best I can come
up with is to try and hide it:

  a = __myfoo = lambda { |x| x < 2 ? 1 : x * __myfoo.call(x-1) }

Is there a better way that this?

Thanks,

Brian.