On Sat, Jul 25, 2009 at 6:38 AM, neville holmes<[email protected]> wrote:
> Having a third, and even a fourth, argument need not
> be difficult and would certainly be useful, especially
> (in my direct experience) in teaching beginners tacit
> programming.
>
> At the risk of boring long-term readers of this forum,
> my repeated suggestion has been for the use of [. and
> ]. to bring in operands just as [ and ] bring in
> arguments. Then with &[. [.& &]. or ].& you would
> effectively have third and fourth arguments. There
> would be many other simplifications then made available
> as well.
Perhaps:
0&{::
1&{::
2&{::
3&{::
This gives you four arguments. And, for some domains,
you can use n&{ instead of n&{::
I can not think of an expression off the top of my head which
would use four arguments, hopefully their use is obvious?
--
Raul
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