invalid6363
Programmer
i need help on how to write a predicate that will duplicate the items in a list, where the left argument is a list and whose right argument is a list consisting of every element in the left list written twice.
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how do i duplicate items in a list?
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invalid6363
Programmer
never mind i got it.
dups([],[]).
dups([H|T],[H,H|Y]) :- dups(T,Y).
dups([],[]).
dups([H|T],[H,H|Y]) :- dups(T,Y).
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