RosettaCodeData/Task/Remove-duplicate-elements/Prolog/remove-duplicate-elements-4.pro

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Prolog
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2013-04-10 23:57:08 -07:00
?- distinct([A, A, 1, 2, 3, 2, 3, 4],Xs).
Xs = [A, 1, 2, 3, 4]