eslint: enable extra rules

no-implicit-coercion, no-extra-boolean-cast, no-invalid-this, logical-assignment-operators, no-unmodified-loop-condition

packages/hydrooj/src/script/rating.ts

@@ -111,7 +111,7 @@ export async function calcLevel(domainId: string, report: Function) {
     let bulk = coll.initializeUnorderedBulkOp();
     for await (const dudoc of ducur) {
         count++;
-        if (!dudoc.rp) dudoc.rp = null;
+        dudoc.rp ||= null;
         if (dudoc.rp !== last.rp) rank = count;
         bulk.find({ _id: dudoc._id }).updateOne({ $set: { rank } });
         last = dudoc;