From: "Florian Groß" <florgro@...>
Date: 2006-01-06T23:32:42+09:00
Subject: Re: How to write a destructive string method?

Henrik wrote:

> Nor can I do (assuming another alias_method):
> 
> 	def upcase!
> 	  self.old_upcase!
> 	  self.tr!("åäö", "ÅÄÖ")
> 	end
> 
> or the same thing chained (self.old_upcase!.tr!(...)), because that only 
> returns nil.

I'd do it like this: (Ignoring the more obvious replace solution)

class String
   alias :old_upcase! :upcase!
   def upcase!()
     old_upcase!
     tr!("åäö", "ÅÄÖ")
   end

   def upcase()
     result = self.clone
     result.upcase!
     return result
   end
end

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