On Thu, 22 Feb 2001, Jean Michel wrote:

> Watch out  here! The fact  that you can consider  an array as  a special
> case of a hash, of for that matter  a string or a file or a directory as
> a special case of an array is much more than just an analogy. The set of
> properties  which is  shared in  these cases  is an  extremely important
> programming  paradigm, and  a language  which can  express clearly  this
> paradigm in a uniform way in all cases will have a definite advantage. I
> think the  mixins that matju is  trying to make can  potentially achieve
> this for Ruby.

Are there any theoretical papers which explain this property, and hopefully
have a list of these properties and their classifications?

-- 
  spwhite / chariot.net.au