From: Greg Willits <lists@...>
Date: 2010-10-30T11:14:50+09:00
Subject: Dynamically reference instance vars

If I need to dynamically reference instance vars, is this the only way
to do it (var set example)?

  my_object.send(:instance_variable_set, "@#{iname}", ivalue)

I expected something more elegant, but this is the only way I can get it
to work. No biggie, just curious.

More complete example below.

-- gw


class Shape
  attr_accessor :size, :fill_color, :line_color, :line_width
  def initialize
    @size = ""
    @fill_color = ""
    @line_color = ""
    @line_width = ""
  end
end

my_shape = Shape.new

shape_details = {
  :size => 'small',
  :fill_color => 'red',
  :line_color => 'black',
  :line_width => '2'}

shape_details.each do |iname, ivalue|
  my_shape.send(:instance_variable_set, "@#{iname}", ivalue)
end

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