From: Robert Klemme <shortcutter@...>
Date: 2009-03-08T23:01:53+09:00
Subject: Re: Extending has for default value, can't get it to work

2009/3/7 Jo Be <nous.placidus@gmail.com>:
> http://pastie.org/409974
>
> When I instantiate MyHash.new I get an empty hash. Just not sure how to
> proceed.

If initializing the Hash with particular values is the only reason for
a subclass, I would not choose this approach.  You could rather do any
of these

1. cloning

MyHash = {:foo => "bar".freeze}.freeze

new_hash = MyHash.dup

2. method

def Hash.my
  {:foo => "bar"}
end

new_hash = Hash.my

IMHO a subclass is only worthwhile if you add functionality.  But even
then I'd probably rather consider delegation over inheritance.
Another alternative is to create a module with additional
functionality.  It all depends on what you want to achieve.

Kind regards

robert

-- 
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