Protected ReadonlyballotsReadonlycandidatesStatic ReadonlyisStatic ReadonlyneedsStatic ReadonlyneedsReturn a matrix of duels from all the ballots
Result of the vote. The first item lists the winners of the vote.
For example this ranking means that Bear wins, Sheep is second and Lion third
[ [ 'Bear' ], [ 'Sheep' ], [ 'Lion' ] ]
Return a new instance of the same method restricted to a subset of candidates. Ballots are filtered to remove candidates not in the subset; unranked candidates are NOT appended (preserves only opinions voters expressed).
Wikipedia: Approval voting