From: James Gray <james@...>
Date: 2008-07-25T04:44:29+09:00
Subject: Re: what is "p"?

On Jul 24, 2008, at 2:39 PM, matu wrote:

> Farrel Lifson wrote:
>
>> That's correct. The Kernel module is mixed into Object (and hence is
>> available in every object as every object is a descendant of Object).
>>
>
> Ok. Thank you both. But...
>
> hi.rb:
> module Hi
>  def ola
>    p 'ola'
>  end
> end
>
>>> require 'hi'
> => true
>>> include Hi
> => Object
>>> Object.methods.include? 'ola'
> => true
>>> ola
> "ola"
> => nil
>>> Object.methods.include? 'p'
> => false
>
> WTF? Why does Object.methods not include p? Kernel is mixed in like  
> my Hi
> module, right? So why does Object.methods include ola, but not p?

It does.  You just need to know that it's a private method:

 >> Object.private_methods.include? "p"
=> true

James Edward Gray II