/**
 * Generates a UUID (Universally Unique Identifier).
 * @returns A UUID string.
 */
export declare function generateUUID(): string;
/**
 * Generates a unique username based on a full name and email.
 * @param fullName - The user's full name.
 * @param email - The user's email.
 * @returns A unique username.
 */
export declare function generateUniqueUsername(fullName: string, email: string): string;
/**
 * Generates a slug from a title and an optional author.
 * @param title - The title to slugify.
 * @param author - The author of the title, defaults to 'guest'.
 * @returns A slug string.
 */
export declare function slugify(title: string, author?: string): string;
/**
 * Generates a unique filename by combining a base name with a unique identifier.
 * @param baseName - The base name of the file.
 * @returns A unique filename string.
 */
export declare function generateUniqueFilename(baseName: string): string;
/**
 * Generates a unique token using a combination of random values and timestamp.
 * @returns A unique token string.
 */
export declare function generateToken(): string;
/**
 * Checks if all elements in an array are unique.
 * @param array - The array to check.
 * @returns True if all elements are unique, false otherwise.
 */
export declare function hasUniqueElements(array: any[]): boolean;