From: Gavin Kistner <gavin@...>
Date: 2005-11-24T13:05:54+09:00
Subject: Re: syntax error warning: useless use of a variable in void context

On Nov 23, 2005, at 3:57 PM, Christophe Grandsire wrote:
> The only ways to make this work is:
> - to make the instance variable @a readable with "attr_reader :a"  
> and replace "tlr.@a" with "tlr.a"
> - to bypass encapsulation by replacing "tlr.@a" with  
> "tlr.instance_variable_get(:@a)".

To be pedantic:
a) attr_reader doesn't make an instance variable readable, it's a  
convenient way to add a method that returns the value of the instance  
variable.

b) There are other ways (variations on your latter) such as  
tlr.instance_eval{ @a }