From: why the lucky stiff <ruby-talk@...>
Date: 2004-03-13T07:42:43+09:00
Subject: Re: saving array

Phidippus wrote:

>TypeError: can't dump NArray
>        from /usr/local/lib/ruby/1.6/pstore.rb:111:in `dump'
>        from /usr/local/lib/ruby/1.6/pstore.rb:111:in `transaction'
>        from (irb):5
>  
>
Here's one way to do it in YAML.  Hopefully we can make this simpler in 
the future.  Not too bad for now.

    class NArray
        def is_complex_yaml?
            true
        end
        def to_yaml_type
            "!ruby/narray"
        end
        def to_yaml( opts = {} )
            opts[:DocType] = self.class if Hash === opts
            YAML::quick_emit( self.object_id, opts ) { |out|
                out.seq( to_yaml_type ) { |seq|
                    seq.concat( self.to_a )
                }
            }
        end
    end

    YAML.add_ruby_type( 'narray' ) { |type, val| NArray[ *val ] ) }


_why