From: Ilan Berci <coder68@...>
Date: 2007-03-30T00:53:09+09:00
Subject: Re: Newbie question about dynamic class overriding

Ilan Berci wrote:
> 
> irb(main):001:0> class A
> irb(main):002:1> def send; "send"; end
> irb(main):003:1> end
> => nil
> irb(main):004:0> a = A.new
> => #<A:0x38665c>
> irb(main):005:0> def a.send; super + '_version2' ; end
> => nil
> irb(main):006:0> a.send
> => "send_version2"
> irb(main):007:0> A.new.send
> => "send"
> 
>

Emil,

My apologies, your title asked to do this dynamically, so this is 
probably what you want:

irb(main):001:0> class A
irb(main):002:1> end
=> nil
irb(main):003:0> A.module_eval(%q{class << self; def send2(str); str; 
end; end})=> nil
irb(main):004:0> A.send2
ArgumentError: wrong number of arguments (0 for 1)
        from (irb):4:in `send2'
        from (irb):4
        from :0
irb(main):005:0> A.send2("whoops")
=> "whoops"


your question is a little confusing as class definition itself is 
dynamic in ruby..  but I guess this is what you want by adding a class 
method "dynamically"

ilan

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