From: Li Chen <chen_li3@...>
Date: 2009-06-03T12:09:46+09:00
Subject: Re: Do I need self in this method definition

matt neuburg wrote:

> You do if you really want a class method - that is, if you want to be
> able to call this thing by saying Hash.my_each(hash1, hash2).
> 
> The alternative is to make an instance method. Then you could call it by
> saying hash1.my_each(hash2). In that case, you would not use "self" in
> the def. m.


Thank you so much. Here is my implement of an instance method. But I 
cannot explain very clear why I  can #each directly without a receiver.


Li


class Hash
def my_each(hash2={})
    each do |k,v|
      if  hash2.has_key?(k)
          print k,"\t",v,"\t", hash2[k],"\n"
       else
           print k,"\t",v,"\n"
      end
    end
end

end
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