[newbie] Usefulness of cut (!) ? As opposed to "fail" ?

From: Dirk Mittler (mdirk_at_sympatico.ca)
Date: 05/09/04

  • Next message: Martin Sondergaard: "Re: [newbie] Usefulness of cut (!) ? As opposed to "fail" ?" 
    Date: Sat, 8 May 2004 19:03:56 -0400

    I'm using SWI-Prolog, and learning as I go. I haven't bought a book about
    Prolog yet, but intend to. Meanwhile, I'm absorbing as much as I can from
    the manual, and from general reading. And from experimenting all day.

    One question I have in mind, and maybe somebody can explain this to me, is
    why in a list of conditions, it's useful to have a cut operator (!) . One
    situation would be, to avoid dangling pointers. Another situation could be,
    if it was followed by a semicolon (or). But under what circumstances would
    code want to issue a cut (!), not followed by a "fail", and not followed by
    a ";" ?

    Dirk

  • Next message: Martin Sondergaard: "Re: [newbie] Usefulness of cut (!) ? As opposed to "fail" ?"