export declare function getFilledArray<T extends (v: number, k: number) => unknown, Y extends ReturnType<T>>(range: number, mapfn: T): Y[];
export declare function updateIndex<T extends unknown[]>(array: T, indexItem: number, item: T[keyof T]): T;
export declare function joinArrayStrings(array: readonly string[]): string;
export declare function append<T extends unknown[]>(array: T, item: T[keyof T]): T;
export declare function mergeArrayStringFromIndex(array: readonly string[], arrayToMerge: readonly string[], fromIndex: number): string[];