42 lines
1.4 KiB
TypeScript
42 lines
1.4 KiB
TypeScript
/*
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Copyright 2020 Bruno Windels <bruno@windels.cloud>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* @license
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* Based off baseSortedIndex function in Lodash <https://lodash.com/>
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* Copyright JS Foundation and other contributors <https://js.foundation/>
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* Released under MIT license <https://lodash.com/license>
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* Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
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* Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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*/
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export function sortedIndex<T>(array: T[], value: T, comparator: (x:T, y:T) => number): number {
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let low = 0;
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let high = array.length;
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while (low < high) {
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let mid = (low + high) >>> 1;
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let cmpResult = comparator(value, array[mid]);
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if (cmpResult > 0) {
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low = mid + 1;
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} else if (cmpResult < 0) {
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high = mid;
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} else {
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low = high = mid;
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}
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}
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return high;
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}
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