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Releases

votes@4.0.0

Major Changes

• af1be8f: Refactor everything. New API. Main changes:

  • Remove external dependency javascript-lp-solver.
  • Implement tie-breaking mechanism.
  • New Election class to chain rankers together.
  • New unrankedLast option on ballot methods: by default unranked candidates
    join a ballot as one tied bottom tier; pass false to score only expressed
    preferences.
  • Round-based methods report per-round details: scores, tie-break steps, and
    method-specific info (CoombsInfo, NansonInfo).
  • Round-method ranking() now includes the winners tier.
  • New Schulze#strengths() exposing the beatpath strength matrix.
  • New iteratedRanking() on all methods and Election: fill each place by
    re-running the full method without the already-placed candidates, instead of
    using the method's own full ranking. restrict() is now public, and the
    iterateRanking helper is exported under utils.
  • Ranked pairs: fix infinite recursion on raw win-count matrices with wide
    ties.

Patch Changes

• 6eed0be: Performance and packaging improvements:

  • matrixFromBallots now indexes candidates with a Map and tracks unranked
    candidates with a Set (was O(ballots × candidates²)).
  • New pairwiseMatrix utility; Copeland and Schulze share it.
  • Simplify Ranked pairs winner detection (removes dead score bookkeeping).
  • package.json exports now declares explicit types conditions and
    exposes ./package.json.
  • Remove the utils.Edge re-export; use RankedPairsEdge from the package
    root instead.