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RosettaCodeData/Task/Apply-a-callback-to-an-array/Prolog/apply-a-callback-to-an-arra...

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Prolog
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?- assert((fun(X, Y) :- Y is 2 * X)).
true.
?- maplist(fun, [1,2,3,4,5], L).
L = [2,4,6,8,10].
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