From: Chris Hulan <chris.hulan@...>
Date: 2011-10-21T21:38:36+09:00
Subject: Re: When is a method known to Ruby?

...
>  module Foo
>
>    CONSTANT_1 = 'bla'
>    CONSTANT_2 = foo('bla')
>
>    def self.foo(i) # i is a string that will be shortened.

As Robert described, the call to foo in assignment to CONSTANT_2
occurs before foo is defined

cheers