donghao526 commented on code in PR #3130:
URL: https://github.com/apache/kvrocks/pull/3130#discussion_r2471630044
##########
src/types/tdigest.h:
##########
@@ -150,3 +152,70 @@ inline StatusOr<double> TDigestQuantile(TD&& td, double q)
{
diff /= (lc.weight / 2 + rc.weight / 2);
return Lerp(lc.mean, rc.mean, diff);
}
+
+inline void AssignRankForEqualInputs(const std::vector<size_t>& indices,
double cumulative_weight,
+ std::vector<int>& result) {
+ for (auto index : indices) {
+ result[index] = static_cast<int>(cumulative_weight);
+ }
+}
+
+template <typename TD>
+inline Status TDigestRevRank(TD&& td, const std::vector<double>& inputs,
std::vector<int>& result) {
+ std::map<double, std::vector<size_t>> value_to_indices;
+ for (size_t i = 0; i < inputs.size(); ++i) {
+ value_to_indices[inputs[i]].push_back(i);
Review Comment:
Ok, Use DoubleComparator to ensure the two double values are equal
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