From: Markus Gaelli <gaelli@...>
Date: 2006-09-01T08:16:43+09:00
Subject: Fwd: [Q] How would you do method extensions (sometimes called class extensions) in Ruby?



Begin forwarded message:

> From: Sam Roberts <sroberts@bycast.com>
> Date: August 31, 2006 11:44:20 PM GMT+02:00
> To: Markus Gaelli <gaelli@emergent.de>
> Subject: Re: [Q] How would you do method extensions (sometimes  
> called class extensions) in Ruby?
>
> On Fri, Sep 01, 2006 at 06:08:11AM +0900, Markus Gaelli wrote:
>> I am aware of Singleton Methods, but as they can extend instances,
>> (how) can I extend classes without changing their original class
>> definition in Ruby?
>
> This is probably best posted to ruby-talk, not ruby-core, folks would
> likely be quite interested.
>
> classes are "open" in ruby, you can add methods as you wish.
>
> irb(main):001:0> s = "hi"
> => "hi"
> irb(main):002:0> class String; def this(opt) puts(self+opt) end end
> => nil
> irb(main):003:0> s.this(" that")
> hi that
> => nil
> irb(main):004:0> "bye".this(" that")
> bye that
> => nil
>
> Cheers,
> Sam
>