/**
 * Iterates over elements of collection, returning the first element
 * predicate returns truthy for.
 *
 * @param collection - The collection to inspect
 * @param predicate - The function invoked per iteration
 * @param fromIndex - The index to search from
 * @returns The matched element, else undefined
 *
 * @example
 * ```ts
 * const users = [
 *   { 'user': 'barney',  'age': 36, 'active': true },
 *   { 'user': 'fred',    'age': 40, 'active': false },
 *   { 'user': 'pebbles', 'age': 1,  'active': true }
 * ];
 *
 * find(users, function(o) { return o.age < 40; });
 * // => object for 'barney'
 *
 * // The `_.matches` iteratee shorthand.
 * find(users, { 'age': 1, 'active': true });
 * // => object for 'pebbles'
 *
 * // The `_.matchesProperty` iteratee shorthand.
 * find(users, ['active', false]);
 * // => object for 'fred'
 *
 * // The `_.property` iteratee shorthand.
 * find(users, 'active');
 * // => object for 'barney'
 * ```
 */
export declare function find<T>(collection: T[], predicate: ((value: T, index: number, collection: T[]) => boolean) | Record<string, any> | string | [
    string,
    any
], fromIndex?: number): T | undefined;
/**
 * This method is like find except that it iterates over elements of
 * collection from right to left.
 *
 * @param collection - The collection to inspect
 * @param predicate - The function invoked per iteration
 * @param fromIndex - The index to search from
 * @returns The matched element, else undefined
 *
 * @example
 * ```ts
 * findLast([1, 2, 3, 4], function(n) {
 *   return n % 2 === 1;
 * });
 * // => 3
 * ```
 */
export declare function findLast<T>(collection: T[], predicate: ((value: T, index: number, collection: T[]) => boolean) | Record<string, any> | string | [
    string,
    any
], fromIndex?: number): T | undefined;
/**
 * This method is like find except that it returns the index of the first
 * element predicate returns truthy for, instead of the element itself.
 *
 * @param array - The array to inspect
 * @param predicate - The function invoked per iteration
 * @param fromIndex - The index to search from
 * @returns The index of the found element, else -1
 *
 * @example
 * ```ts
 * const users = [
 *   { 'user': 'barney',  'active': false },
 *   { 'user': 'fred',    'active': false },
 *   { 'user': 'pebbles', 'active': true }
 * ];
 *
 * findIndex(users, function(o) { return o.user === 'barney'; });
 * // => 0
 * ```
 */
export declare function findIndex<T>(array: T[], predicate: ((value: T, index: number, array: T[]) => boolean) | Record<string, any> | string | [
    string,
    any
], fromIndex?: number): number;
/**
 * This method is like findIndex except that it iterates over elements
 * of collection from right to left.
 *
 * @param array - The array to inspect
 * @param predicate - The function invoked per iteration
 * @param fromIndex - The index to search from
 * @returns The index of the found element, else -1
 *
 * @example
 * ```ts
 * const users = [
 *   { 'user': 'barney',  'active': true },
 *   { 'user': 'fred',    'active': false },
 *   { 'user': 'pebbles', 'active': false }
 * ];
 *
 * findLastIndex(users, function(o) { return o.user === 'pebbles'; });
 * // => 2
 * ```
 */
export declare function findLastIndex<T>(array: T[], predicate: ((value: T, index: number, array: T[]) => boolean) | Record<string, any> | string | [
    string,
    any
], fromIndex?: number): number;