From: Ryan Davis <ryand-ruby@...>
Date: 2010-04-21T16:20:53+09:00
Subject: Re: Module "re-opening"


On Apr 20, 2010, at 22:55 , tilde wrote:

> Hi there, first time arond here for me, and first step with ruby ^^
> 
> well, i come with a simple (maybe stupid) question:
> 
> http://sprunge.us/BjJP?rb
> 
> why this simple source doesn't do what is expected? (modify the visibility of sqrt module)
> 
> thx in advance for any answer ^^

It is essentially a class method, so you need to invoke private at the class level:

>> module Math; class << self; private :sqrt; end; end
>> Math.sqrt 42
NoMethodError: private method `sqrt' called for Math:Module