export type Comparator<T> = (a: T, b: T) => number;
export declare const DEFAULT_COMPARATOR: Comparator<any>;
type AnyArray<T = any> = {
    [Index in number]: T;
} & {
    length: number;
};
export declare function binarySearch<Arr extends AnyArray>(array: Arr, find: Arr[number]): number;
export declare function binarySearch<Arr extends AnyArray, Find>(array: Arr, find: Find, comparator: Comparator<Arr[number] | Find>, low?: number, high?: number): number;
/**
 * Finds the index of the greatest element less than a given search value in a sorted array
 * using a binary search.  If the given search value is less than or equal to all elements in the
 * array, returns -1.
 *
 * @param {array} the array to search in.
 * @param {find} the value to search for.
 * @param {comparator} two-argument function that returns &lt; 0 if
 *      the first argument is less than the second; &gt; 0 if the first
 *      argument is greater; and 0 otherwise. (defaults to <code>a - b</code>)
 * @param {low} the lower bound of the range in <code>array</code> to
 *      search in (defaults to 0)
 * @param {high} the upper bound of the range in <code>array</code> to
 *      search in (defaults to <code>array.length - 1</code>)
 */
export declare function lowerIndex<Arr extends AnyArray>(array: Arr, find: Arr[number]): number;
export declare function lowerIndex<Arr extends AnyArray, Find>(array: Arr, find: Find, comparator: Comparator<Arr[number] | Find>, low?: number, high?: number): number;
/**
 * Finds the entry with the greatest element less than a given search value in a sorted array
 * using a binary search.  If the search value is less than or equal to all elements in the
 * array, returns [-1, undefined].
 *
 * @param {array} the array to search in.
 * @param {find} the value to search for.
 * @param {comparator} two-argument function that returns &lt; 0 if
 *      the first argument is less than the second; &gt; 0 if the first
 *      argument is greater; and 0 otherwise. (defaults to <code>a - b</code>)
 * @param {low} the lower bound of the range in <code>array</code> to
 *      search in (defaults to 0)
 * @param {high} the upper bound of the range in <code>array</code> to
 *      search in (defaults to <code>array.length - 1</code>)
 */
export declare function lowerEntry<Arr extends AnyArray>(array: Arr, find: Arr[number]): [number, Arr[number] | undefined];
export declare function lowerEntry<Arr extends AnyArray, Find>(array: Arr, find: Find, comparator: Comparator<Arr[number] | Find>, low?: number, high?: number): [number, Arr[number] | undefined];
/**
 * Finds the greatest element less than a given value in a sorted array
 * using a binary search.  If the given value is less than or equal to all elements in the
 * array, returns undefined.
 *
 * @param {array} the array to search in.
 * @param {find} the value to search for.
 * @param {comparator} two-argument function that returns &lt; 0 if
 *      the first argument is less than the second; &gt; 0 if the first
 *      argument is greater; and 0 otherwise. (defaults to <code>a - b</code>)
 * @param {low} the lower bound of the range in <code>array</code> to
 *      search in (defaults to 0)
 * @param {high} the upper bound of the range in <code>array</code> to
 *      search in (defaults to <code>array.length - 1</code>)
 */
export declare function lowerValue<Arr extends AnyArray>(array: Arr, find: Arr[number]): Arr[number] | undefined;
export declare function lowerValue<Arr extends AnyArray, Elem>(array: Arr, find: Elem, comparator: Comparator<Arr[number] | Elem>, low?: number, high?: number): Arr[number] | undefined;
/**
 * Finds the index of the greatest element less than or equal to a given search value in a sorted array
 * using a binary search.  If the given value is less than all elements in the
 * array, returns -1.
 *
 * @param {array} the array to search in.
 * @param {find} the value to search for.
 * @param {comparator} two-argument function that returns &lt; 0 if
 *      the first argument is less than the second; &gt; 0 if the first
 *      argument is greater; and 0 otherwise. (defaults to <code>a - b</code>)
 * @param {low} the lower bound of the range in <code>array</code> to
 *      search in (defaults to 0)
 * @param {high} the upper bound of the range in <code>array</code> to
 *      search in (defaults to <code>array.length - 1</code>)
 */
export declare function floorIndex<Arr extends AnyArray>(array: Arr, find: Arr[number]): number;
export declare function floorIndex<Arr extends AnyArray, Elem>(array: Arr, find: Elem, comparator: Comparator<Arr[number] | Elem>, low?: number, high?: number): number;
/**
 * Finds the entry with the greatest element less than or equal to a given search value in a sorted array
 * using a binary search.  If the given value is less than all elements in the
 * array, returns [-1, undefined].
 *
 * @param {array} the array to search in.
 * @param {find} the value to search for.
 * @param {comparator} two-argument function that returns &lt; 0 if
 *      the first argument is less than the second; &gt; 0 if the first
 *      argument is greater; and 0 otherwise. (defaults to <code>a - b</code>)
 * @param {low} the lower bound of the range in <code>array</code> to
 *      search in (defaults to 0)
 * @param {high} the upper bound of the range in <code>array</code> to
 *      search in (defaults to <code>array.length - 1</code>)
 */
export declare function floorEntry<Arr extends AnyArray>(array: Arr, find: Arr[number]): [number, Arr[number] | undefined];
export declare function floorEntry<Arr extends AnyArray, Elem>(array: Arr, find: Elem, comparator: Comparator<Arr[number] | Elem>, low?: number, high?: number): [number, Arr[number] | undefined];
/**
 * Finds the greatest element less than or equal to a given search value in a sorted array
 * using a binary search.  If the given value is less than all elements in the
 * array, returns undefined.
 *
 * @param {array} the array to search in.
 * @param {find} the value to search for.
 * @param {comparator} two-argument function that returns &lt; 0 if
 *      the first argument is less than the second; &gt; 0 if the first
 *      argument is greater; and 0 otherwise. (defaults to <code>a - b</code>)
 * @param {low} the lower bound of the range in <code>array</code> to
 *      search in (defaults to 0)
 * @param {high} the upper bound of the range in <code>array</code> to
 *      search in (defaults to <code>array.length - 1</code>)
 */
export declare function floorValue<Arr extends AnyArray>(array: Arr, find: Arr[number]): Arr[number] | undefined;
export declare function floorValue<Arr extends AnyArray, Elem>(array: Arr, find: Elem, comparator: Comparator<Arr[number] | Elem>, low?: number, high?: number): Arr[number] | undefined;
/**
 * Finds the index of the least element greater than or equal to a given search value in a sorted array
 * using a binary search.  If the given value is greater than all elements in the
 * array, returns the length of the array.
 *
 * @param {array} the array to search in.
 * @param {find} the value to search for.
 * @param {comparator} two-argument function that returns &lt; 0 if
 *      the first argument is less than the second; &gt; 0 if the first
 *      argument is greater; and 0 otherwise. (defaults to <code>a - b</code>)
 * @param {low} the lower bound of the range in <code>array</code> to
 *      search in (defaults to 0)
 * @param {high} the upper bound of the range in <code>array</code> to
 *      search in (defaults to <code>array.length - 1</code>)
 */
export declare const ceilingIndex: typeof binarySearch;
/**
 * Finds the entry with the least element greater than or equal to a given search value in a sorted array
 * using a binary search.  If the given value is greater than all elements in the
 * array, returns [array.length, undefined].
 *
 * @param {array} the array to search in.
 * @param {find} the value to search for.
 * @param {comparator} two-argument function that returns &lt; 0 if
 *      the first argument is less than the second; &gt; 0 if the first
 *      argument is greater; and 0 otherwise. (defaults to <code>a - b</code>)
 * @param {low} the lower bound of the range in <code>array</code> to
 *      search in (defaults to 0)
 * @param {high} the upper bound of the range in <code>array</code> to
 *      search in (defaults to <code>array.length - 1</code>)
 */
export declare function ceilingEntry<Arr extends AnyArray>(array: Arr, find: Arr[number]): [number, Arr[number] | undefined];
export declare function ceilingEntry<Arr extends AnyArray, Elem>(array: Arr, find: Elem, comparator: Comparator<Arr[number] | Elem>, low?: number, high?: number): [number, Arr[number] | undefined];
/**
 * Finds the least element greater than or equal to a given search value in a sorted array
 * using a binary search.  If the given value is greater than all elements in the
 * array, returns undefined.
 *
 * @param {array} the array to search in.
 * @param {find} the value to search for.
 * @param {comparator} two-argument function that returns &lt; 0 if
 *      the first argument is less than the second; &gt; 0 if the first
 *      argument is greater; and 0 otherwise. (defaults to <code>a - b</code>)
 * @param {low} the lower bound of the range in <code>array</code> to
 *      search in (defaults to 0)
 * @param {high} the upper bound of the range in <code>array</code> to
 *      search in (defaults to <code>array.length - 1</code>)
 */
export declare function ceilingValue<Arr extends AnyArray>(array: Arr, find: Arr[number]): Arr[number] | undefined;
export declare function ceilingValue<Arr extends AnyArray, Elem>(array: Arr, find: Elem, comparator: Comparator<Arr[number] | Elem>, low?: number, high?: number): Arr[number] | undefined;
/**
 * Finds the index of the least element greater than a given value in a sorted array
 * using a binary search.  If the given value is greater than or equal to all elements in the
 * array, returns the length of the array.
 *
 * @param {array} the array to search in.
 * @param {find} the value to search for.
 * @param {comparator} two-argument function that returns &lt; 0 if
 *      the first argument is less than the second; &gt; 0 if the first
 *      argument is greater; and 0 otherwise. (defaults to <code>a - b</code>)
 * @param {low} the lower bound of the range in <code>array</code> to
 *      search in (defaults to 0)
 * @param {high} the upper bound of the range in <code>array</code> to
 *      search in (defaults to <code>array.length - 1</code>)
 */
export declare function higherIndex<Arr extends AnyArray>(array: Arr, find: Arr[number]): number;
export declare function higherIndex<Arr extends AnyArray, Elem>(array: Arr, find: Elem, comparator: Comparator<Arr[number] | Elem>, low?: number, high?: number): number;
/**
 * Finds the entry with the least element greater than a given value in a sorted array
 * using a binary search.  If the given value is greater than or equal to all elements in the
 * array, returns [array.length, undefined].
 *
 * @param {array} the array to search in.
 * @param {find} the value to search for.
 * @param {comparator} two-argument function that returns &lt; 0 if
 *      the first argument is less than the second; &gt; 0 if the first
 *      argument is greater; and 0 otherwise. (defaults to <code>a - b</code>)
 * @param {low} the lower bound of the range in <code>array</code> to
 *      search in (defaults to 0)
 * @param {high} the upper bound of the range in <code>array</code> to
 *      search in (defaults to <code>array.length - 1</code>)
 */
export declare function higherEntry<Arr extends AnyArray>(array: Arr, find: Arr[number]): [number, Arr[number] | undefined];
export declare function higherEntry<Arr extends AnyArray, Elem>(array: Arr, find: Elem, comparator: Comparator<Arr[number] | Elem>, low?: number, high?: number): [number, Arr[number] | undefined];
/**
 * Finds the least element greater than a given value in a sorted array
 * using a binary search.  If the given value is greater than or equal to all elements in the
 * array, returns undefined.
 *
 * @param {array} the array to search in.
 * @param {find} the value to search for.
 * @param {comparator} two-argument function that returns &lt; 0 if
 *      the first argument is less than the second; &gt; 0 if the first
 *      argument is greater; and 0 otherwise. (defaults to <code>a - b</code>)
 * @param {low} the lower bound of the range in <code>array</code> to
 *      search in (defaults to 0)
 * @param {high} the upper bound of the range in <code>array</code> to
 *      search in (defaults to <code>array.length - 1</code>)
 */
export declare function higherValue<Arr extends AnyArray>(array: Arr, find: Arr[number]): Arr[number] | undefined;
export declare function higherValue<Arr extends AnyArray, Elem>(array: Arr, find: Elem, comparator: Comparator<Arr[number] | Elem>, low?: number, high?: number): Arr[number] | undefined;
export {};