From: diego scataglini <dwebsubmit@...>
Date: 2007-07-11T22:57:01+09:00
Subject: Re: Polymorphic Code

Thank you for the correction =)

Diego Scataglini

On Jul 11, 2007, at 9:19 AM, Phrogz <phrogz@mac.com> wrote:

> On Jul 8, 3:31 pm, diego scataglini <dwebsub...@gmail.com> wrote:
>> I believe that changes to a class don't modify its already existing
>> instances. But you can always add and remove behavior of an object.
>
> C:\>irb
> irb(main):001:0> class Foo; def sq(x) x*x end; end
> irb(main):002:0> f = Foo.new
> irb(main):003:0> f.sq( 12 )
> => 144
>
> irb(main):004:0> class Foo; def double(x) x+x end; end
> irb(main):005:0> f.double( 21 )
> => 42
>
> irb(main):006:0> class Foo; def sq(x) x*x*x end; end
> irb(main):007:0> f.sq( 12 )
> => 1728
>
>