/** @module utils */
/**
 * Delays for a specified amount of time.
 *
 * @param ms - The number of milliseconds to delay for.
 * @returns A promise that resolves after the delay.
 */
export declare function timeout(ms: number): Promise<void>;
/**
 * Comparison function for sorting in descending order.
 *
 * @param a - The first value to compare.
 * @param b - The second value to compare.
 * @returns -1 if a > b, 1 if b > a, 0 otherwise.
 */
export declare function sortToLower(a: any, b: any): number;
/**
 * Comparison function for sorting in ascending order.
 *
 * @param a - The first value to compare.
 * @param b - The second value to compare.
 * @returns 1 if a > b, -1 if b > a, 0 otherwise.
 */
export declare function sortToHigher(a: any, b: any): number;
/**
 * Pads a value with leading zeros until it reaches a specified length.
 *
 * @param val - The value to pad.
 * @param length - The desired length of the padded value.
 * @returns The padded value as a string.
 */
export declare function padZero(val: any, length?: number): string;
export declare const ALPHABET: string;
export declare const ALPHABET_LENGTH: number;
/**
 * Generates a random token of a specified length.
 *
 * @param length - The desired length of the token.
 * @returns A random token.
 */
export declare function randomToken(length?: number): string;
/**
 * Creates an array of whole numbers in a specified range.
 *
 * @param start - The start of the range.
 * @param end - The end of the range (exclusive).
 * @param step - The step size between values, defaults to 1.
 * @returns The generated array.
 */
export declare function range(start: number, end: number, step?: number): number[];
/**
 * Shuffles an array and returns it.
 * Does not modify the original array.
 *
 * @param arr - The array to shuffle.
 * @returns The shuffled array.
 */
export declare function shuffle<T>(arr: T[]): T[];
/**
 * Selects a random element from an array, or returns null if the array is
 * empty.
 *
 * @param arr - The array to select from.
 * @returns A random element from the array, or null.
 */
export declare function randomEl<T>(arr: T[]): T | null;
/**
 * Checks how closely a search string matches a value, and returns a score
 * representing the match quality.
 *
 * @param search - The search string.
 * @param val - The value to check for a match.
 * @returns 0 if no match, 1+ if there was a match (lower is better).
 */
export declare function searchScore(search: string, val: string): number;
/**
 * Calculates the sum of all numbers in an array.
 *
 * @param ar - The array of numbers to sum.
 * @returns The sum of all numbers in the array.
 */
export declare function sum(ar: number[]): number;
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