From: Robert Klemme <bob.news@...>
Date: 2005-02-21T23:54:47+09:00
Subject: Re: YAML and hash


"Artur Merke" <merke@ls1.cs.uni-dortmund.de> schrieb im Newsbeitrag
news:Pine.LNX.4.33.0502211443370.17818-100000@as0203.cs.uni-dortmund.de...
> Hi,
>
> is there a possibility to recognize multiple keys while
> reading a hash using YAML?
>
> example:
>
> arr= YAML::load("aaa: 1\nbbb: 2\naaa: 3" )
> => {"aaa"=>3, "bbb"=>2}
>
> but I would like to get a warning or an exception when
> encountering the key 'aaa' for the second time, and not just
> get the first entry overwritten.
>
> Any ideas?

I don't have much insight into YAML internals but you'll probably be able
to do that with YAML#add_builtin_type or YAML#add_ruby_type
http://www.ruby-doc.org/core/classes/YAML.html#M001712

Kind regards

    robert