From: Rick DeNatale <rick.denatale@...>
Date: 2007-11-11T02:28:38+09:00
Subject: Re: top-level methods and constants

On Nov 10, 2007 12:10 PM, Xavier Noria <fxn@hashref.com> wrote:
> A couple of questions regarding the top-level environment of execution.
>
> * The Pickaxe says on page 376 that top-level methods are defined as
> private instance methods of Object, whereas Ruby for Rails says on
> page 203 they are private instance methods of the Kernel module. Which
> one is correct?

Looks like the pickaxe:

def foo
end

self.private_methods.include?("foo") # => true
Object.private_instance_methods(false).include?("foo") # => true
Kernel.private_instance_methods(false).include?("foo") # => false

Note though that in irb top level methods are public:
irb(main):001:0> def foo
irb(main):002:1> end
=> nil
irb(main):003:0>
irb(main):004:0* self.private_methods.include?("foo")
=> false
irb(main):005:0> Object.private_instance_methods(false).include?("foo")
=> false
irb(main):006:0> Kernel.private_instance_methods(false).include?("foo")
=> false
irb(main):007:0> Object.instance_methods(false).include?("foo")
=> true
irb(main):008:0>

-- 
Rick DeNatale

My blog on Ruby
http://talklikeaduck.denhaven2.com/