(function (factory) {
    if (typeof module === "object" && typeof module.exports === "object") {
        var v = factory(require, exports);
        if (v !== undefined) module.exports = v;
    }
    else if (typeof define === "function" && define.amd) {
        define(["require", "exports"], factory);
    }
})(function (require, exports) {
    /*---------------------------------------------------------------------------------------------
     *  Copyright (c) Microsoft Corporation. All rights reserved.
     *  Licensed under the MIT License. See License.txt in the project root for license information.
     *--------------------------------------------------------------------------------------------*/
    'use strict';
    /**
     * Takes a sorted array and a function p. The array is sorted in such a way that all elements where p(x) is false
     * are located before all elements where p(x) is true.
     * @returns the least x for which p(x) is true or array.length if no element fullfills the given function.
     */
    function findFirst(array, p) {
        var low = 0, high = array.length;
        if (high === 0) {
            return 0; // no children
        }
        while (low < high) {
            var mid = Math.floor((low + high) / 2);
            if (p(array[mid])) {
                high = mid;
            }
            else {
                low = mid + 1;
            }
        }
        return low;
    }
    exports.findFirst = findFirst;
    function binarySearch(array, key, comparator) {
        var low = 0, high = array.length - 1;
        while (low <= high) {
            var mid = ((low + high) / 2) | 0;
            var comp = comparator(array[mid], key);
            if (comp < 0) {
                low = mid + 1;
            }
            else if (comp > 0) {
                high = mid - 1;
            }
            else {
                return mid;
            }
        }
        return -(low + 1);
    }
    exports.binarySearch = binarySearch;
});
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