From: "David A. Black" <dblack@...>
Date: 2009-01-21T11:17:35+09:00
Subject: Re: cannot get attr_accessor to work

Hi --

On Wed, 21 Jan 2009, Tom Cloyd wrote:

> I've been staring at this for a couple of hours, and I cannot crack the nut. 
> This SHOULD work, but I'm obviously screwing up. Just cannot see where. I'm 
> carefully following several examples, but...I cannot get access to my 
> instance variables.
>
> Here's a stripped down version of the code -
>
> # SetNet.rb
>
> def main
> # Set up logging
> run_log = Manage_log.new( 'logfile.txt' ).open
> log = run_log.log
> logging_now = run_log.lgg    # @logging_now = false

I haven't read the rest of your code but I'll bet the problem is right
there. Ruby is interpreting log and logging_now as local variables. If
you want to call the methods of those names, you have to do:

   self.log = run_log.log
   self.logging_now = run_log.lgg

Basically, given any expression that looks like this:

    var = value

the parser interprets var as a local variable name. So you have to add
the explicit receiver to achieve the method call.


David

-- 
David A. Black / Ruby Power and Light, LLC
Ruby/Rails consulting & training: http://www.rubypal.com
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