/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
export declare function shallowEqualArrays(a: any[], b: any[]): boolean;
export declare function shallowEqual(a: {
    [x: string]: any;
}, b: {
    [x: string]: any;
}): boolean;
export declare function flatten<T>(a: T[][]): T[];
export declare function first<T>(a: T[]): T;
export declare function last<T>(a: T[]): T;
export declare function and(bools: boolean[]): boolean;
export declare function merge<V>(m1: {
    [key: string]: V;
}, m2: {
    [key: string]: V;
}): {
    [key: string]: V;
};
export declare function forEach<K, V>(map: {
    [key: string]: V;
}, callback: Function): void;