From: George Moschovitis <george.moschovitis@...>
Date: 2005-11-16T21:42:12+09:00
Subject: Re: YAML on 1.8.3 question

Ehm,

I forgot to tell you that the original object does not exist in the
current context.

so, o = YAML.load does not yield an object.

-g.


On 11/16/05, Mauricio Fern�ndez <mfp@acm.org> wrote:
> On Wed, Nov 16, 2005 at 08:53:08PM +0900, George Moschovitis wrote:
> > Hello all,
> >
> > I have a yaml file that I parse like this
> >
> > yaml = YAML.parse(yaml_str)
> >
> > the 'yaml_str' variable holds the serialized version of an Object.
> > Lets say this object hase 2 attributes, 'title' and 'body'.
> >
> > How can I access them from the 'yaml' variable. Ie I want an imaginary
> > method 'lookup':
> >
> > yaml.lookup['title'] # => returns the title value.
>
> require 'yaml'
> o = Object.new
> o.instance_eval{ @title = "foo"; @body = "bar" }
> s = YAML.dump(o) # => "!ruby/object \nbody: bar\ntitle: foo\n"
>
> # for instance
> def add_lookup(obj)
>   def obj.lookup(x); instance_variable_get "@#{x}" end
> end
>
> o2 = YAML.load(s)
> add_lookup(o2)
> o2.lookup "title" # => "foo"
> o2.lookup "body" # => "bar"
> [RUBY_VERSION, RUBY_RELEASE_DATE] # => ["1.8.3", "2005-09-24"]
>
> --
> Mauricio Fernandez
>
>


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