From: Max Williams <toastkid.williams@...>
Date: 2008-03-12T21:08:51+09:00
Subject: Passing only a hash key, with no value, as an option

I'm using the method of parameter passing where i have one 'regular'
parameter and then a hash of options:

def chunkify(something, options = {})
  ...
end

I want to have it so that the user can just pass a key through without
having to set it to anything, eg

dinner = chunkify(bacon, :extra_fine)

However, 'extra_fine' is just being treated as a symbol, rather than a
hash key, and so 'options' is simply the symbol :extra_fine, rather than
the hash {:extra_fine => nil}.

I can fix this by passing :extra_fine => true to the method, but can i
set up the method so it will just take the hash key, and maybe some
other hash_keys, some with and some without values?

thanks
max
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