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