/**
 * Creates an array of values by running each element in collection through iteratee.
 *
 * @param collection - The collection to iterate over
 * @param iteratee - The function invoked per iteration
 * @returns The new mapped array
 *
 * @example
 * ```ts
 * function square(n) {
 *   return n * n;
 * }
 *
 * map([4, 8], square);
 * // => [16, 64]
 *
 * map({ 'a': 4, 'b': 8 }, square);
 * // => [16, 64] (iteration order is not guaranteed)
 *
 * const users = [
 *   { 'user': 'barney' },
 *   { 'user': 'fred' }
 * ];
 *
 * // The `_.property` iteratee shorthand.
 * map(users, 'user');
 * // => ['barney', 'fred']
 * ```
 */
export declare function map<T, R>(collection: T[], iteratee: ((value: T, index: number, collection: T[]) => R) | string): R[];
/**
 * Creates a flattened array of values by running each element in collection
 * through iteratee and flattening the mapped results. The iteratee is invoked
 * with three arguments: (value, index|key, collection).
 *
 * @param collection - The collection to iterate over
 * @param iteratee - The function invoked per iteration
 * @returns The new flattened array
 *
 * @example
 * ```ts
 * function duplicate(n) {
 *   return [n, n];
 * }
 *
 * flatMap([1, 2], duplicate);
 * // => [1, 1, 2, 2]
 * ```
 */
export declare function flatMap<T, R>(collection: T[], iteratee: ((value: T, index: number, collection: T[]) => R | R[]) | string): R[];
/**
 * This method is like flatMap except that it recursively flattens the
 * mapped results.
 *
 * @param collection - The collection to iterate over
 * @param iteratee - The function invoked per iteration
 * @returns The new flattened array
 *
 * @example
 * ```ts
 * function duplicate(n) {
 *   return [[[n, n]]];
 * }
 *
 * flatMapDeep([1, 2], duplicate);
 * // => [1, 1, 2, 2]
 * ```
 */
export declare function flatMapDeep<T, R>(collection: T[], iteratee: ((value: T, index: number, collection: T[]) => R | R[]) | string): R[];
/**
 * This method is like flatMap except that it recursively flattens the
 * mapped results up to depth times.
 *
 * @param collection - The collection to iterate over
 * @param iteratee - The function invoked per iteration
 * @param depth - The maximum recursion depth
 * @returns The new flattened array
 *
 * @example
 * ```ts
 * function duplicate(n) {
 *   return [[[n, n]]];
 * }
 *
 * flatMapDepth([1, 2], duplicate, 2);
 * // => [[1, 1], [2, 2]]
 * ```
 */
export declare function flatMapDepth<T, R>(collection: T[], iteratee: ((value: T, index: number, collection: T[]) => R | R[]) | string, depth?: number): R[];