forkJoin is deprecated: resultSelector is deprecated, pipe to map instead

Question

I\'m working on an Angular 6 project.

Running ng lint gives the following Warning:

"forkJoin is deprecated: resultSelector is deprecated,

Answer 1

This is because they the RXJS team puts their deprecation warnings at the top of the file.

 import { Observable } from '../Observable';
import { ObservableInput, ObservedValueOf, ObservedValuesFromArray, SubscribableOrPromise } from '../types';

/** @deprecated Use the version that takes an array of Observables instead */
export declare function forkJoin(v1: SubscribableOrPromise): Observable<[T]>;
/** @deprecated Use the version that takes an array of Observables instead */
export declare function forkJoin(v1: ObservableInput, v2: ObservableInput): Observable<[T, T2]>;
/** @deprecated Use the version that takes an array of Observables instead */
export declare function forkJoin(v1: ObservableInput, v2: ObservableInput, v3: ObservableInput): Observable<[T, T2, T3]>;
/** @deprecated Use the version that takes an array of Observables instead */
export declare function forkJoin(v1: ObservableInput, v2: ObservableInput, v3: ObservableInput, v4: ObservableInput): Observable<[T, T2, T3, T4]>;
/** @deprecated Use the version that takes an array of Observables instead */
export declare function forkJoin(v1: ObservableInput, v2: ObservableInput, v3: ObservableInput, v4: ObservableInput, v5: ObservableInput): Observable<[T, T2, T3, T4, T5]>;
/** @deprecated Use the version that takes an array of Observables instead */
export declare function forkJoin(v1: ObservableInput, v2: ObservableInput, v3: ObservableInput, v4: ObservableInput, v5: ObservableInput, v6: ObservableInput): Observable<[T, T2, T3, T4, T5, T6]>;
export declare function forkJoin(sources: [ObservableInput]): Observable<[A]>;
export declare function forkJoin(sources: [ObservableInput, ObservableInput]): Observable<[A, B]>;
export declare function forkJoin(sources: [ObservableInput, ObservableInput, ObservableInput]): Observable<[A, B, C]>;
export declare function forkJoin(sources: [ObservableInput, ObservableInput, ObservableInput, ObservableInput]): Observable<[A, B, C, D]>;
export declare function forkJoin(sources: [ObservableInput, ObservableInput, ObservableInput, ObservableInput, ObservableInput]): Observable<[A, B, C, D, E]>;
export declare function forkJoin(sources: [ObservableInput, ObservableInput, ObservableInput, ObservableInput, ObservableInput, ObservableInput]): Observable<[A, B, C, D, E, F]>;
export declare function forkJoin[]>(sources: A): Observable[]>;
export declare function forkJoin(sourcesObject: {}): Observable;
export declare function forkJoin(sourcesObject: T): Observable<{
    [K in keyof T]: ObservedValueOf;
}>;
/** @deprecated resultSelector is deprecated, pipe to map instead */
export declare function forkJoin(...args: Array | Function>): Observable;
/** @deprecated Use the version that takes an array of Observables instead */
export declare function forkJoin(...sources: ObservableInput[]): Observable;