From: hubert@... (Hubert Hung-Hsien Chang)
Date: 2002-03-24T12:57:04+09:00
Subject: Re: matrix.rb and question dervied from looking at it.

Well... of course we can... silly, i should have just tested myself.

def *(m)
    if(m.is_a?(Array))
       #do thing,
    else
        super(m)
    end
end

Embarassing.... :-)


hubert@cs.nyu.edu (Hubert Hung-Hsien Chang) wrote in message news:<98ba0902.0203161224.3682ad98@posting.google.com>...
> I took a look at the matrix.rb and here is one question:
> 
> Could we 'add' new  way of responding to parameters for 
> existing method?
> 
> For example, could we add ( or why can't we do this?)
> 
> 
> def *(m)
>        if(m.is_a?(Array))
>              return m.collect  {|x|   x  * m}
>         else
>               return #whatever the original method does.
>         end
> end
> 
> Under the Integer ( or other 'number' class, Fixnum, Bignum and so on.)
> class method?
> 
> Is there a way to do it ( without inventing new class)?
> 
> I look at the matrix.rb and they didn't implement this. In other words,
> if ou want to multiple the vector by a scalar, do it the '.scalar' way
> (or something like that.)
> 
> 
> Thanks
> 
> 
> Hubert