From: 7stud -- <bbxx789_05ss@...>
Date: 2009-02-22T05:28:24+09:00
Subject: Re: How to call a module method dynamically

Adrian Klingel wrote:
> Yeah, that's definitely new to me.  Thanks stud.

Me too. Can anyone explain why I can do this:

num = 1
puts Object.module_eval("num")   #=>1

def f
  "xyz"
end

puts Object.module_eval("f")   #=>xyz

but I can't do this:

module Foo
  def mymethod
    "xyz"
  end
end

puts Foo.module_eval("mymethod")

--output:--
`module_eval': undefined local variable or method `mymethod' for 
Foo:Module (NameError)

That result and the result from my previous example seem to imply that 
free standing def's are added to Object's singleton class, i.e. they are 
class methods.  But in pickaxe2, p.346 it says:

-------
Outside a class or module definition, a definition with an unadorned 
method name is added as a private method to class Object, and hence may 
be called in any context without an explicit receiver.
-------





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