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- import { Operator } from '../Operator';
- import { Observer } from '../Observer';
- import { Observable } from '../Observable';
- import { Subscriber } from '../Subscriber';
- import { OperatorFunction } from '../interfaces';
- /**
- * Compares all values of two observables in sequence using an optional comparor function
- * and returns an observable of a single boolean value representing whether or not the two sequences
- * are equal.
- *
- * <span class="informal">Checks to see of all values emitted by both observables are equal, in order.</span>
- *
- * <img src="./img/sequenceEqual.png" width="100%">
- *
- * `sequenceEqual` subscribes to two observables and buffers incoming values from each observable. Whenever either
- * observable emits a value, the value is buffered and the buffers are shifted and compared from the bottom
- * up; If any value pair doesn't match, the returned observable will emit `false` and complete. If one of the
- * observables completes, the operator will wait for the other observable to complete; If the other
- * observable emits before completing, the returned observable will emit `false` and complete. If one observable never
- * completes or emits after the other complets, the returned observable will never complete.
- *
- * @example <caption>figure out if the Konami code matches</caption>
- * var code = Rx.Observable.from([
- * "ArrowUp",
- * "ArrowUp",
- * "ArrowDown",
- * "ArrowDown",
- * "ArrowLeft",
- * "ArrowRight",
- * "ArrowLeft",
- * "ArrowRight",
- * "KeyB",
- * "KeyA",
- * "Enter" // no start key, clearly.
- * ]);
- *
- * var keys = Rx.Observable.fromEvent(document, 'keyup')
- * .map(e => e.code);
- * var matches = keys.bufferCount(11, 1)
- * .mergeMap(
- * last11 =>
- * Rx.Observable.from(last11)
- * .sequenceEqual(code)
- * );
- * matches.subscribe(matched => console.log('Successful cheat at Contra? ', matched));
- *
- * @see {@link combineLatest}
- * @see {@link zip}
- * @see {@link withLatestFrom}
- *
- * @param {Observable} compareTo The observable sequence to compare the source sequence to.
- * @param {function} [comparor] An optional function to compare each value pair
- * @return {Observable} An Observable of a single boolean value representing whether or not
- * the values emitted by both observables were equal in sequence.
- * @method sequenceEqual
- * @owner Observable
- */
- export declare function sequenceEqual<T>(compareTo: Observable<T>, comparor?: (a: T, b: T) => boolean): OperatorFunction<T, boolean>;
- export declare class SequenceEqualOperator<T> implements Operator<T, boolean> {
- private compareTo;
- private comparor;
- constructor(compareTo: Observable<T>, comparor: (a: T, b: T) => boolean);
- call(subscriber: Subscriber<boolean>, source: any): any;
- }
- /**
- * We need this JSDoc comment for affecting ESDoc.
- * @ignore
- * @extends {Ignored}
- */
- export declare class SequenceEqualSubscriber<T, R> extends Subscriber<T> {
- private compareTo;
- private comparor;
- private _a;
- private _b;
- private _oneComplete;
- constructor(destination: Observer<R>, compareTo: Observable<T>, comparor: (a: T, b: T) => boolean);
- protected _next(value: T): void;
- _complete(): void;
- checkValues(): void;
- emit(value: boolean): void;
- nextB(value: T): void;
- }
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