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RxJS operator functions
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import { Observable } from 'rxjs'; | |
import { filter } from 'rxjs/operators'; | |
function inputIsNotNullOrUndefined<T>(input: null | undefined | T): input is T { | |
return input !== null && input !== undefined; | |
} | |
export function isNotNullOrUndefined<T>() { | |
return (source$: Observable<null | undefined | T>) => | |
source$.pipe( | |
filter(inputIsNotNullOrUndefined) | |
); | |
} |
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