19 lines
560 B
JavaScript
19 lines
560 B
JavaScript
// Port of lower_bound from https://en.cppreference.com/w/cpp/algorithm/lower_bound
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// Used to compute insertion index to keep queue sorted after insertion
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export default function lowerBound(array, value, comparator) {
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let first = 0;
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let count = array.length;
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while (count > 0) {
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const step = Math.trunc(count / 2);
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let it = first + step;
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if (comparator(array[it], value) <= 0) {
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first = ++it;
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count -= step + 1;
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}
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else {
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count = step;
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}
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}
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return first;
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}
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