/**
 * Applies a filter and map functions into an array to return a new array.
 *
 * Note: Saves an additional loop while doing filter & map separately.
 *
 * @param {any[]} list
 * @param {(((element: any, index: number) => boolean) | false)} filter
 * @param {(element: any, index: number) => T} [map]
 * @returns {T[]}
 */
export declare function fmap<T>(list: any[], filter: ((element: any, index: number) => boolean) | false, map?: (element: any, index: number) => T): T[];