From: Shawn Anderson <shawn42@...>
Date: 2008-04-01T03:35:08+09:00
Subject: Re: Modifying FIX::* method

------=_Part_14711_31447217.1206988500926
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

Adam,
I believe the OP wanted a Foo object returned, not a Fixnum.

/Shawn

On Mon, Mar 31, 2008 at 11:27 AM, Adam Shelly <adam.shelly@gmail.com> wrote:

> On 3/31/08, Alex DeCaria <alex.decaria@millersville.edu> wrote:
> > I want to be able to multiply a NUMERIC object by my Foo object and have
> > it return a new Foo object with all the instance variables multiplied by
> > the Numeric object.
> [...]
> > I'm thinking I have to modify the "*" method for all the subclasses of
> > the NUMERIC class.  Is this correct?  Or am I missing something.
> >
>
> You don't need to modify Numeric, you just need to tell it how to
> coerce your object into a number.
>
> irb(main):057:0* class Foo
> irb(main):058:1> def initialize(x)
> irb(main):059:2> @x=x
> irb(main):060:2> end
> irb(main):061:1> def coerce(n)
> irb(main):062:2> [n,@x]
> irb(main):063:2> end
> irb(main):064:1> end
> => nil
> irb(main):065:0> 2 + Foo.new(3)
> => 5
> irb(main):066:0> f=Foo.new(4)
> => #<Foo:0x283b13c @x=4>
> irb(main):067:0> 8/f
> => 2
>
> -Adam
>
>

------=_Part_14711_31447217.1206988500926--