At 08:48 PM 4/13/01 +0900, ts wrote:
> >>>>> "L" == Luigi Ballabio <luigi.ballabio / riskmap.net> writes:
>
>  Add
>
> >> class One
> >>    def + (x)
> >>       x+1
> >>    end
>
>       def coerce(x)
>          [x, 1]
>       end
>
> >> end
>
>L> Sort of __radd__ in Python?
>
>  it will work also with '3 * one' and 'one * 3' if you define 'def *(x)'
>  (or with -)

Hmm. Looks like I kept my example too simple.
The real picture is, I have a TridiagonalOperator class written in C++ and 
exported to Ruby through SWIG. Not easy to coerce to a Float :) I export 
the operator * (a matrix times a scalar) and I hoped I could get 
scalar*matrix for free. Oh well...

Thanks anyway,
                 Luigi