Code RoomObject keys coerce to strings

MediumPrep Room Coding #1973

Object keys coerce to strings

Code reviewCode quality & reviewMid–Senior~18 min

Review this JavaScript that builds a price-count histogram and serializes it, expecting to read prices back later.

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 18 min

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

1function histogram(prices) {

2 const h = {};

3 for (const p of prices) { // p like 0.1, 0.2, 0.3

4 const key = p * 3; // bucket width grouping

5 h[key] = (h[key] || 0) + 1;

6 }

7 return JSON.stringify(h);

8}

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