From: Robert Klemme <bob.news@...>
Date: 2006-03-26T07:53:54+09:00
Subject: Re: Object methods

Eustaquio Rangel de Oliveira J wrote:
> Hello there. :-)
> 
> Ok, I know I can do this to add a method (and a class)
> to an object:
> 
> irb(main):001:0> s = "Testing!"
> => "Testing!"
> irb(main):002:0> class <<s
> irb(main):003:1>    def says
> irb(main):004:2>       puts "s says:"+self
> irb(main):005:2>    end
> irb(main):006:1> end
> => nil
> irb(main):007:0> s.says
> s says:Testing!
> => nil
> irb(main):008:0> x = "Another test."
> => "Another test."
> irb(main):009:0> x.says
> NoMethodError: undefined method `says' for "Another
> test.":String
>         from (irb):9
>         from :0
> irb(main):010:0> 
> 
> My question is, dinamically, how to do that? Just like
> this:
> 
> irb(main):010:0> x.class.class_eval %q(def x.says()
> puts "x says:"+self end)
> => nil
> irb(main):011:0> x.says
> x says:Another test.
> 
> Or there is another shorter way to do that, with an
> object? To build an object method with some parameters
> like a string or a Proc?

I'm not sure what exactly you're after.  Do you mean

class String
   def says
     print "s says: ", self, "\n"
   end
end

?

	robert