Re: Benefits of Dynamic Typing

In article <435bb30b$0$6500$ed2619ec@xxxxxxxxxxxxxxxxxxxxxxxxxx>,
Jon Harrop <usenet@xxxxxxxxxxxxxx> wrote:

> Rainer Joswig wrote:
> > In article <435a6eb7$0$49774$ed2e19e4@xxxxxxxxxxxxxxxxxxxxxxxxxx>,
> > Jon Harrop <usenet@xxxxxxxxxxxxxx> wrote:
> >> I have written several, others also exist, e.g. Richard Fateman's
> >> MockMMA.
> >
> > Where are they?
>
> WRI bought the first one (so it is no longer on my academic website, which
> has since been deleted anyway). They paid me to develop the second one, so
> that is theirs.
>
> > Are your implementations also of the 'depth' of MockMMa?
>
> I put more effort into high-performance execution of general purpose
> programs written in Mathematica whereas, IIRC, MockMMA put more effort into
> polynomial manipulation functions.
>
> > Is it even allowed to implement Mathematica?
>
> WRI have copyright over the look and feel and I am sure they would defend
> that in court. However, nobody will mind if you write a mini Mathematica
> interpreter for fun. I actually recommend doing this as a learning
> exercise. In particular, try writing a complete implementation of the
> pattern matcher. You may like to try it in ML and in Lisp. I bet the ML
> implementation is much shorter and faster. :-)

Why isn't Mathematica written in Mathematica?
.

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