Hi Chris,

Chris Brown wrote:
> My_hash contains standard data of an RSS file:
> channel_title, channel URl and items.
> Items contains: title, link, author and description.
>
> so My_hash['title'] returns the right RSS channel
> Title e.g. CNN To stories
>
> But how can I return only all the links? or only one
> description? I'm not familiar with hashes so I'm confused.

I just had to work through this a week or so ago (accessing a hash of
hashes, not the RSS part) so I'll pass along what I learned in the hope it
will help.

In general, a hash is a set of (key, value) pairs.  The value can be a
singleton value, another hash, an array...  Those values can, themselves, be
any of the same.  To access a values in a multi-level hash, you iterate
through the levels.  So conditionally accessing a hash of hashes looks
like...

level1.each do |level1_key, level1_value|   # iterate through the top level
set of pairs
  if level1_key == what_you_want            # test each key to see if you
want to process it's values
    level1_value.each do |level2_key, level2_value|  # if you do, and it's a
hash itself, iterate through it
      if level2_key == another_thing_you_want  # test each key to see if ...
        level2_value.each do |level2_key, level3_value|  # and so on
           # and down you go...
        end
      end
    end
  end
end

HTH,
Bill