RosettaCodeData/Task/Remove-duplicate-elements/Prolog/remove-duplicate-elements-3.pro

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Prolog
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2023-07-01 11:58:00 -04:00
member1(X,[H|_]) :- X==H,!.
member1(X,[_|T]) :- member1(X,T).
distinct([],[]).
distinct([H|T],C) :- member1(H,T),!, distinct(T,C).
distinct([H|T],[H|C]) :- distinct(T,C).