Two bookings overlap if they share any instant. The ranges are half-open — a range that ends exactly when the next begins does not collide with it, which is what makes back-to-back bookings possible at all.
The module under test
| 1 | export function overlaps(a, b) { | ||
| 2 | if (!a || !b) { | ||
| 3 | return false; | ||
| 4 | } | ||
| 5 | return a.start < b.end && b.start < a.end; | ||
| 6 | } | ||
| 7 | |||
| 8 | export function merge(ranges) { | ||
| 9 | const sorted = ranges.slice().sort((x, y) => x.start - y.start); | ||
| 10 | const merged = []; | ||
| 11 | for (const range of sorted) { | ||
| 12 | const last = merged[merged.length - 1]; | ||
| 13 | if (last && range.start <= last.end) { | ||
| 14 | last.end = Math.max(last.end, range.end); | ||
| 15 | } else { | ||
| 16 | merged.push({ start: range.start, end: range.end }); | ||
| 17 | } | ||
| 18 | } | ||
| 19 | return merged; | ||
| 20 | } | ||
| 21 |
Your tests
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