/**
 * @param arraysOrValues Arrays or values to concatenate.
 * @returns A new array containing the concatenated elements.
 */
export declare function concat<T extends defined, U extends defined[]>(...arraysOrValues: (T | U)[]): (T | U[number])[];
export declare function isArray(arg: unknown): arg is unknown[];
/**
 * @param arr The array to modify. This array is modified in place.
 * @param start The index at which to start changing the array.
 * @param deleteCount? The number of elements to remove.
 * @param items Elements to insert.
 * @returns An array containing the removed elements.
 */
export declare function splice<T extends defined>(arr: T[], start: number, deleteCount?: number, ...items: T[]): T[];
/**
 * Simulates JavaScript's Array.prototype.slice
 * @param arr The array to slice.
 * @param start The beginning index of the slice.
 * @param end_ The ending index of the slice (exclusive).
 * @returns A new array containing the extracted elements.
 */
export declare function slice<T extends defined>(arr: T[], start: number, end_?: number): T[];
declare const ArrayX: {
    isArray: typeof isArray;
    concat: typeof concat;
    slice: typeof slice;
    splice: typeof splice;
};
export default ArrayX;