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34 lines
786 B
34 lines
786 B
1 year ago
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import ascending from "./ascending";
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export default function(compare) {
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if (compare.length === 1) compare = ascendingComparator(compare);
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return {
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left: function(a, x, lo, hi) {
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if (lo == null) lo = 0;
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if (hi == null) hi = a.length;
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while (lo < hi) {
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var mid = lo + hi >>> 1;
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if (compare(a[mid], x) < 0) lo = mid + 1;
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else hi = mid;
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}
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return lo;
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},
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right: function(a, x, lo, hi) {
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if (lo == null) lo = 0;
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if (hi == null) hi = a.length;
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while (lo < hi) {
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var mid = lo + hi >>> 1;
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if (compare(a[mid], x) > 0) hi = mid;
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else lo = mid + 1;
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}
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return lo;
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}
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};
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}
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function ascendingComparator(f) {
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return function(d, x) {
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return ascending(f(d), x);
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};
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}
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