import { NgZone } from '@angular/core';
import { OperatorFunction } from 'rxjs';
export declare function toInteger(value: any): number;
export declare function toString(value: any): string;
export declare function getValueInRange(value: number, max: number, min?: number): number;
export declare function isString(value: any): value is string;
export declare function isNumber(value: any): value is number;
export declare function isInteger(value: any): value is number;
export declare function isDefined(value: any): boolean;
export declare function padNumber(value: number): string;
export declare function regExpEscape(text: any): any;
export declare function hasClassName(element: any, className: string): boolean;
export declare function closest(element: HTMLElement, selector?: string): HTMLElement | null;
/**
 * Force a browser reflow
 * @param element element where to apply the reflow
 */
export declare function reflow(element: HTMLElement): DOMRect;
/**
 * Creates an observable where all callbacks are executed inside a given zone
 *
 * @param zone
 */
export declare function runInZone<T>(zone: NgZone): OperatorFunction<T, T>;
export declare function removeAccents(str: string): string;
/**
* Returns the the last element in the array where predicate is true, and null
* otherwise.
* @param array The source array to search in
* @param predicate find calls predicate once for each element of the array, in descending
* order, until it finds one where predicate returns true. If such an element is found,
* findLast immediately returns that element. Otherwise, findLast returns null.
*/
export declare function findLast<T>(array: Array<T>, predicate: (value: T, index: number, obj: T[]) => boolean): T;
/**
* Returns the the last element's index in the array where predicate is true, and null
* otherwise.
* @param array The source array to search in
* @param predicate calls predicate once for each element of the array, in descending
* order, until it finds one where predicate returns true. If such an element is found,
* findLastIndex immediately returns that element's index. Otherwise, findLast returns -1.
*/
export declare function findLastIndex<T>(array: Array<T>, predicate: (value: T, index: number, obj: T[]) => boolean): number;
/**
 * Gets the next focusable item in a list. It is expected that the items in the given list contain
 * a disabled property such that disabled items are skipped when calculating next focusable item.
 * @param currentIndex - Starting point from where to start checking
 * @param allItems - all items in list
 * @param delta - either 1 to get next item in positive direction or -1 to get next item in previous direction
 * @returns next item
 */
export declare function getNextItemInList<T extends {
    disabled: boolean;
}>(currentIndex: number, allItems: T[], delta: 1 | -1): T;
/**
 * Gets the next focusable item's index in a list. It is expected that the items in the given list contain
 * a disabled property such that disabled items are skipped when calculating next focusable item.
 * @param currentIndex - Starting point from where to start checking
 * @param allItems - all items in list
 * @param delta - either 1 to get next item in positive direction or -1 to get next item in previous direction
 * @returns next focusable item's index
 */
export declare function getNextItemIndexInList<T extends {
    disabled?: boolean;
}>(currentIndex: number, allItems: T[], delta: 1 | -1): number;
/**
 * Coerces a value to an array of trimmed non-empty strings.
 * Any input that is not an array, `null` or `undefined` will be turned into a string
 * via `toString()` and subsequently split with the given separator.
 * `null` and `undefined` will result in an empty array.
 * This results in the following outcomes:
 * - `null` -&gt; `[]`
 * - `[null]` -&gt; `["null"]`
 * - `["a", "b ", " "]` -&gt; `["a", "b"]`
 * - `[1, [2, 3]]` -&gt; `["1", "2,3"]`
 * - `[{ a: 0 }]` -&gt; `["[object Object]"]`
 * - `{ a: 0 }` -&gt; `["[object", "Object]"]`
 *
 * Useful for defining CSS classes or table columns.
 * @param value the value to coerce into an array of strings
 * @param separator split-separator if value isn't an array
 */
export declare function coerceStringArray(value: any, separator?: string | RegExp): string[];