From: Brian Candler <b.candler@...>
Date: 2010-04-20T05:44:03+09:00
Subject: Re: ya config file parser

Roberto Cm wrote:
> to load the file on new(), I changed the class like this:
> 
> require 'yaml'
> 
> class ConfigYaml
> 
>   def initialize(file)
>     if file.nil?? then
>       yaml_conf = YAML.load_file(file)
>     end
>     @data = case yaml_conf.nil?
>       when true then YAML.load_file(file)
>       else {}
>     end
>     update!(data)
>   end

That looks a bit broken - 'data' is a local variable or method, which 
you don't seem to have, which is different from @data which is an 
instance variable.

You could try this as a starting point:

class ConfigYaml
  def initialize(file)
    @filename = file
    load
  end

  def load
    @data = YAML.load_file(@filename)
  rescue Errno::ENOENT
    @data = {}
  end

  def save
    File.open(@filename,"w") { |f| f.write YAML.dump(@data) }
  end

  ... rest as before
end
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