From: Li Chen <chen_li3@...>
Date: 2009-06-03T11:17:05+09:00
Subject: Do I need self in this method definition

Hello everyone,

I have two hashes. They have the same keys but  different or the same
values.
I want to loop through  one hash and print out the  values in both
hashes for the same key.I  add a method to class Hash. I run the script
and it prints out the expected results. I wonder if  I have to use
self#method in my implement.
Thanks for all the comments.

Li



class Hash
  def  self.my_each(hash1={}, hash2={})
    hash1.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


##############main#############
hash1={
'ATC'=>1,
'CTA'=>2,
'CAT'=>10,
'CCC'=>1
}

hash2={
'ATC'=>3,
'CTA'=>2,
'CAT'=>11
}

Hash.my_each(hash1, hash2)
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