I get it… so that's a green cut then?
On 1 Oct 2013, at 23:01, "Michał Bieliński" <[email protected]> wrote:
> Dnia 1 Października 2013, 23:50, Wt, Sean Charles napisał:
>>> I added a cut to avoid the solution with trailing glue.
>>> join([X], _, [X]) :- !.
>>
>> I am confused at the cut.. I have not yet experienced trailing glue,
>> that was the point of the second rule!?
>
> When I compiled your initial example and tested it GNU Prolog returned two
> results. I wanted only one. The behavior without cut is this:
>
> GNU Prolog 1.4.4 (32 bits)
> Compiled Apr 29 2013, 20:41:58 with gcc
> By Daniel Diaz
> Copyright (C) 1999-2013 Daniel Diaz
>
> | ?- join("ABC", "Z", X).
>
> X = [97,[122],98,[122],99] ? ;
>
> X = [97,[122],98,[122],99,[122]]
>
> yes
>
>
> With cut gprolog is satisfied with telling me the first solution.
>
> --
> Michał Bieliński
>
>
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