From: Daniel Berger <Daniel.Berger@...>
Date: 2005-11-22T04:33:22+09:00
Subject: Re: Problem with Pickaxe and Yaml

Mark Haliday wrote:
> I've got the Pickaxe book (2nd edition) and was doing some of the Yaml 
> code on page 417.  I cannot seem to get the expected results.
> 
> Example:
> 
> require 'yaml'
> 
> class Special
> 
>     def initialize(valuable, volatile, precious)
>         @valuable = valuable
>         @volatile = volatile
>         @precious = precious
>     end
> 
>     def to_yaml_properties
>         %w{@precious @valuable}
>     end
> 
>     def to_s
>         "#@valuable #@volatile #@precious"
>     end
> end
> 
> obj = Special.new("Hello", "there", "world")
> data = YAML.dump(obj)
> obj = YAML.load(data)


> puts obj["valuable"]
> 
> The last line throws an error, shouldn't it print out the value for 
> "valuable"?

No.  There's no "[]" method defined.  Try 'puts obj'.

That line isn't in the example, btw.

Regards,

Dan