Function compareIndex

src/rank.js:9–9

(i, j)

  const R = new Float64Array(V.length);
  if (valueof.length !== 2) V = V.map(valueof), valueof = ascending;
  const compareIndex = (i, j) => valueof(V[i], V[j]);
  let k, r;
  values = Uint32Array.from(V, (_, i) => i);
  // Risky chaining due to Safari 14 https://github.com/d3/d3-array/issues/123