Code RoomBigDecimal map key collision

MediumPrep Room Coding #2158

BigDecimal map key collision

Code reviewCode quality & reviewMid–Senior~16 min

Review this Java method that deduplicates and looks up users by a money threshold.

What a strong answer looks like

Separate real bugs from style. Rank issues by severity, point at the root cause rather than the symptom, and suggest a concrete fix, specific and kind.

0:00 of about 16 min

Mark a line and say what kind of problem it is.0 findings

1Map<BigDecimal, User> byBalance = new HashMap<>();

2

3void index(List<User> users) {

4 for (User u : users) {

5 byBalance.put(u.getBalance(), u);

6 }

7}

8

9User exactlyTen() {

10 return byBalance.get(new BigDecimal("10.0"));

11}

Which questions mattered is sealed until you submit. Telling you now would just be handing over the edge cases.