From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2011-01-26T18:33:48+09:00
Subject: Re: Another Basic Ruby Question

On Wed, Jan 26, 2011 at 12:36 AM, Jim Carter <jcarter@leupold.com> wrote:
> Within the Class I define things which I would expect to be Global.
> Both the matrix and the reference to class are not seen in the method
> calculate, as they fall outside of the method declaration.  How do I
> make them visible, so they can remain where they are( Yes, I could pass
> the matrix variable - e.g., calculate(m)- but is there another way to do
> this?)  I don't think I could pass subr in this manner.
>
> Class Subroutines
>
> #some subroutines listed here
>   def altitude(abs_psr_inhg)
>      #stuff
>   end
>
> end
>
>
> Class Ballistics
>
>   require 'Matrix'
>
>   m = Matrix[[1,2,3],[4,5,6]]
>   subr = Subroutines.new
>
>   def calculate
>
>      puts m
>      alt = subr.altitude(abs_psr_inhg)
>
>
>   end
>
> end

You could use instance variables. By the way, class is lowecase:

class Subroutines
  def altitude(abs_psr_inhg)
    puts "altitude"
  end
end

class Ballistics
  require 'Matrix'
  def initialize
    @m = Matrix[[1,2,3],[4,5,6]]
    @subr = Subroutines.new
  end

  def calculate
    puts @m
    alt = @subr.altitude(@m)
  end
end

b = Ballistics.new
b.calculate

Jesus.