Problems › TypeScript › monitoring
What share of requests failed
A status page shows the error rate as a whole percentage, because nobody reads four decimal places at a glance.
- Rounded to the nearest whole percent, halves going up.
- No requests at all means no rate: return 0.
- More errors than requests is impossible data — treat it as 100.
errorRate(errors: int, total: int) → int
Where you start
function errorRate(errors: number, total: number): number {
}Worked examples
| Call | Result |
|---|---|
errorRate(5, 100) | 5 |
errorRate(1, 3) | 33 |
errorRate(2, 3) | 67 |
errorRate(0, 100) | 0 |
Hint
Add half the divisor before dividing, then cap.
Reference solution in TypeScript
function errorRate(errors: number, total: number): number {
if (total <= 0 || errors <= 0) return 0;
return Math.min(100, Math.floor((errors * 100 + Math.floor(total / 2)) / total));
}