Noobie ... Simple Inheriting from Hash Question

ruby-talk
1

Yep, extending Hash was what I ended up doing ...

···

-----Original Message-----
From: David Mitchell [mailto:david.mitchell@telogis.com]
Sent: Wednesday, 18 May 2005 10:11 AM
To: ruby-talk ML
Subject: Re: Noobie ... Simple Inheriting from Hash Question ..

You could just extend the hash class, rather than inheriting from it.
That is, instead of this:

class myHash < Hash
  def foo
    ...
  end
end

Do this:

class Hash
  def foo
    ...
  end
end

Then, all your hash objects will be given your 'foo' method and you can
do things like this:

{:key => "value"}.foo

David

Neville Burnell wrote:

Hi,

I have a class inheriting from Hash which has some specific methods
operating on the hash elements:

Class MyHash < Hash

  def foo
  ...
  end

End

....

Now, with Hash class, its really easy to create a new hash, eg

h = {:key1 => "val1", :key2 => "val2"}

What I would like to do is create a new instance of the class with the

same simplicity, but I'd like to avoid creating a redundant Hash and
tranferring the contents one by one to MyHash which happens if I code:

h = MyHash.new(:key1 => "val1", :key2 => "val2")

and then define initialize(h={})

Whats the "ruby way" tm for something like this?

Thanks

Nev

--
David Mitchell
Software Engineer
Telogis

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