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| function sort<T>(list: Array<T>, cmp?: (a: T, b: T) => number) { | |
| const {length} = list | |
| if (length < 2) return list | |
| cmp ??= (x, y) => (x as unknown as number) - (y as unknown as number) | |
| let unit = 1 | |
| let results = [] as Array<T> | |
| while (length > unit) { | |
| for (let i = 0; i < length; i += unit * 2) { | |
| const m = i | |
| const p = Math.min(m + unit, length - 1) | |
| const n = p - 1 | |
| const q = Math.min(p + unit, length) - 1 | |
| let k = m | |
| let j = p | |
| while (k <= n || j <= q) { | |
| if (k <= n && j <= q) { | |
| if (cmp(list[k], list[j]) > 0) { | |
| results.push(list[j]) | |
| j++ | |
| } else { | |
| results.push(list[k]) | |
| k++ | |
| } | |
| } else if (k <= n) { | |
| results.push(list[k]) | |
| k++ | |
| } else if (j <= q) { | |
| results.push(list[j]) | |
| j++ | |
| } | |
| } | |
| } | |
| list = results | |
| results = [] | |
| unit *= 2 | |
| } | |
| return list | |
| } |
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