import type { Comparer } from '../../types/Comparer.js';
/**
 * Finds elements in this array that don't appear in the other.
 *
 * @param other - The other array to compare with.
 * @param comparerFn - An optional function that accepts two arguments.
 *  The union method calls the comparerFn function to determine the
 *  equality of values. Triple equal `===` comparison is used by default.
 *
 * @returns A new array containing only the elements in this array that
 *  don't appear in the other.
 */
export declare const except: <T>(arr: readonly T[], other: ReadonlyArray<T>, arg2?: Comparer<T>) => Array<T>;