rxjs/dist/types/internal/operators/groupBy.d.ts

Reactive Extensions for modern JavaScript

/** @prettier */
import { Observable } from '../Observable';
import { Subject } from '../Subject';
import { OperatorFunction } from '../types';
export declare function groupBy<T, K extends T>(keySelector: (value: T) => value is K): OperatorFunction<T, GroupedObservable<true, K> | GroupedObservable<false, Exclude<T, K>>>;
export declare function groupBy<T, K>(keySelector: (value: T) => K): OperatorFunction<T, GroupedObservable<K, T>>;
export declare function groupBy<T, K>(keySelector: (value: T) => K, elementSelector: void, durationSelector: (grouped: GroupedObservable<K, T>) => Observable<any>): OperatorFunction<T, GroupedObservable<K, T>>;
export declare function groupBy<T, K, R>(keySelector: (value: T) => K, elementSelector?: (value: T) => R, durationSelector?: (grouped: GroupedObservable<K, R>) => Observable<any>): OperatorFunction<T, GroupedObservable<K, R>>;
export declare function groupBy<T, K, R>(keySelector: (value: T) => K, elementSelector?: (value: T) => R, durationSelector?: (grouped: GroupedObservable<K, R>) => Observable<any>, subjectSelector?: () => Subject<R>): OperatorFunction<T, GroupedObservable<K, R>>;
/**
 * An observable of values that is the emitted by the result of a {@link groupBy} operator,
 * contains a `key` property for the grouping.
 */
export interface GroupedObservable<K, T> extends Observable<T> {
    /**
     * The key value for the grouped notifications.
     */
    readonly key: K;
}
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