Power set: Difference between revisions
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(mapcar '((X) (cons (car Lst) X)) L) |
(mapcar '((X) (cons (car Lst) X)) L) |
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L ) ) ) )</lang> |
L ) ) ) )</lang> |
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=={{header|Prolog}}== |
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<lang prolog> |
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powerset(Set,PowerSet) :- |
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findall(SubSet,subset(Set,SubSet),PowerSet). |
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subset([],[]). |
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subset([_|Tail],Set) :- subset(Tail,Set). |
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subset([Head|Tail],[Head|Set]) :- subset(Tail,Set). |
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?- powerset([1,2,3,4],X). |
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X = [[], [4], [3], [3, 4], [2], [2, 4], [2, 3], [2, 3, 4], [1], [1, 4], [1, 3], [1, 3, 4], [1, 2], [1, 2, 4], [1, 2, 3], [1, 2, 3, 4]]. |
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</lang> |
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=={{header|PureBasic}}== |
=={{header|PureBasic}}== |
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