| import ascending from "./ascending.js"; | |
| import group, {rollup} from "./group.js"; | |
| import sort from "./sort.js"; | |
| export default function groupSort(values, reduce, key) { | |
| return (reduce.length !== 2 | |
| ? sort(rollup(values, reduce, key), (([ak, av], [bk, bv]) => ascending(av, bv) || ascending(ak, bk))) | |
| : sort(group(values, key), (([ak, av], [bk, bv]) => reduce(av, bv) || ascending(ak, bk)))) | |
| .map(([key]) => key); | |
| } | |