?- maplist(dif(X), Xs).Samer Abdallah, 2009
Curatorial remark: Most probably this precious specimen was written earlier than its appearance 2009-02-25 on the SWI-list (Re: [SWIPL] DCG idioms). But no public evidence has been produced hitherto.
Curatorial update: The code fragment:
has been traced back to this file dated 2005. (File date 2009-12-19 17:30)all_diff_from(Vs, F) :- maplist(#\=(F), Vs).