/**
 * @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
 */
import { Observable } from 'rxjs';
/**
 * An unmodifiable list of items that Angular keeps up to date when the state
 * of the application changes.
 *
 * The type of object that {@link ViewChildren}, {@link ContentChildren}, and {@link QueryList}
 * provide.
 *
 * Implements an iterable interface, therefore it can be used in both ES6
 * javascript `for (var i of items)` loops as well as in Angular templates with
 * `*ngFor="let i of myList"`.
 *
 * Changes can be observed by subscribing to the changes `Observable`.
 *
 * NOTE: In the future this class will implement an `Observable` interface.
 *
 * @usageNotes
 * ### Example
 * ```typescript
 * @Component({...})
 * class Container {
 *   @ViewChildren(Item) items:QueryList<Item>;
 * }
 * ```
 *
 * @publicApi
 */
export declare class QueryList<T> {
    readonly dirty = true;
    private _results;
    readonly changes: Observable<any>;
    readonly length: number;
    readonly first: T;
    readonly last: T;
    /**
     * See
     * [Array.map](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map)
     */
    map<U>(fn: (item: T, index: number, array: T[]) => U): U[];
    /**
     * See
     * [Array.filter](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter)
     */
    filter(fn: (item: T, index: number, array: T[]) => boolean): T[];
    /**
     * See
     * [Array.find](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find)
     */
    find(fn: (item: T, index: number, array: T[]) => boolean): T | undefined;
    /**
     * See
     * [Array.reduce](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/reduce)
     */
    reduce<U>(fn: (prevValue: U, curValue: T, curIndex: number, array: T[]) => U, init: U): U;
    /**
     * See
     * [Array.forEach](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach)
     */
    forEach(fn: (item: T, index: number, array: T[]) => void): void;
    /**
     * See
     * [Array.some](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/some)
     */
    some(fn: (value: T, index: number, array: T[]) => boolean): boolean;
    toArray(): T[];
    toString(): string;
    reset(res: Array<T | any[]>): void;
    notifyOnChanges(): void;
    /** internal */
    setDirty(): void;
    /** internal */
    destroy(): void;
}
