Raul Miller wrote:
> To be fair, this will be different from $.
>
> t= $.
>
> t is a verb -- albeit, a verb without a domain.
>
> This means that the cost of implementation would be significant.
This loses me completely. I don't know enough even
to work out whether this is meant to be amusing.
For various reasons I haven't used J since I stopped
teaching it, and then I only taught simple tacit in
class. I was sometimes forced to teach explicit
to students doing their project.
So all that follows is from an out-of-practice and
naive user.
> If he were to implement this, I think Roger would
> have to introduce up to six new classes of parsing
> tokens.
Maybe so. I wouldn't know. But if the introductions
were systematic would this necessarily make it
expensive to do ? After all [ and ] required similar
parsing modifications (I think someone said in this
thread) and it was done and it's very useful. I would
suggest that implementing [. and ]. would prove just
as useful. The usefulness springs in both cases from
providing a a very simple, very basic, and very useful
facility.
> Before I can even begin to think about what
> all this means, I would want to come up with
> a variety of useful or at least plausible examples
> of each.
I wish I could do this, but I now use an ASUS eeePC and
I can't work out how to install J on it. That's one
reason I haven't done any J for quite a while now.
All I can say is that I taught tacit J for quite a few
years and every time students came to me with problems
in their projects and I had to teach them how to code
explicitly [. and ]. would have avoided that every time.
Back then (in the last millennium I think) was when
I suggested [. and ]. as verbs in this forum.
Neville Holmes, P.O. Box 2412, Bakery Hill 3354, Victoria
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