declare function intersperse<T>(arr: ReadonlyArray<T>, value: T): ReadonlyArray<T>;
declare function randomItem<T>(array: ReadonlyArray<T>): T;
declare function isSuperset<T>(superset: ReadonlyArray<T>, subset: ReadonlyArray<T>): boolean;
declare function arrayFirst<T>(arr: ReadonlyArray<T>): T | undefined;
declare function arrayLast<T>(arr: ReadonlyArray<T>): T | undefined;
export declare const Array: {
    intersperse: typeof intersperse;
    randomItem: typeof randomItem;
    isSuperset: typeof isSuperset;
    first: typeof arrayFirst;
    last: typeof arrayLast;
};
export {};